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Importing libart_lgpl from cvs.gnome.org. Version 2.3.7, plus Raph's 

2001-11-07 changes to use the new intersector code.

These files are licensed under the LGPL.

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*.lo
*.la
.deps
.libs
INSTALL
Makefile
Makefile.in
aclocal.m4
art_config.h
confdefs.h
config.cache
config.guess
config.h
config.h.in
config.log
config.status
config.sub
configure
gen_art_config
install-sh
libart-features.h
libtool
ltconfig
ltmain.sh
missing
mkinstalldirs
stamp-h
stamp-h.in
testart
testuta
libart2-config
libartConf.sh
libart-2.0.pc

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Raph Levien <raph@acm.org>

482
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GNU LIBRARY GENERAL PUBLIC LICENSE
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879
other-licenses/libart_lgpl/ChangeLog Normal file
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2001-11-07 Raph Levien <raph@pixel.artofcode.com>
* art_svp_intersect.c (art_svp_intersect_horiz): Fixed important
logic bug, failing to test crossings of neighbors when inserting
horizontal lines. Also changed printf to art_dprint.
* art_misc.c (art_dprint): Added function for debug printing,
so verbose intersector output doesn't have to go through printf.
* art_misc.h (ART_USE_NEW_INTERSECTOR): I've turned this on
now, as the new intersector certainly seems to be performing
better than the old one now.
2001-10-31 Anders Carlsson <andersca@gnu.org>
* Release 2.3.7
2001-10-15 Raph Levien <raph@pixel.artofcode.com>
* art_svp_intersect.c (art_svp_intersect_horiz): Minor
logic fix so that horiz segments successfully cross
zero length segments in the active list.
(art_svp_intersect_test_cross): Flags indicating whether to
do add_point (potentially breaking neighbors) to left and
to right.
(art_svp_intersect_insert_cross): Provide ART_BREAK_LEFT and
ART_BREAK_RIGHT flags to art_svp_intersect_test_cross,
depending on direction of search.
(art_svp_intersect_advance_cursor): Provide flags (allow
both left and right breaking) to test_cross.
2001-10-15 Raph Levien <raph@pixel.artofcode.com>
* art_svp_intersect.c (CHEAP_SANITYCHECK): Added an inexpensive
sanitycheck to detect multiple insertions of a segment into the
horiz list.
(art_svp_writer_rewind_add_point): Avoid breaking lines below
their bottom point.
(art_svp_intersect_test_cross): Handle cases correctly where
intersection point matches y0 of left or right segment. These _do_
happen in real world examples. Also, do add_point on newly
inserted intersection point.
2001-10-14 Raph Levien <raph@pixel.artofcode.com>
* art_svp_intersect.c (art_svp_intersect_add_point): Fixed
rather subtle logic bug that misplaced insertion point
when seg argument was NULL.
2001-10-11 Raph Levien <raph@pixel.artofcode.com>
* art_svp_render_aa.c (art_svp_render_aa_iter_step): Got rid
of qsort of steps, and now keep the step list in sorted order.
Further, we combine duplicate steps with the same x value,
which bounds the size of the step list to x1 - x0, so we
don't need to dynamically resize it. Thanks greatly to
Bruce Q. Hammond for the original version of this patch.
2001-10-09 Raph Levien <raph@pixel.artofcode.com>
* art_svp_intersect.c (art_svp_intersect_test_cross): Breaks
bottom part of line segments in "too close" cases.
2001-10-09 Raph Levien <raph@pixel.artofcode.com>
* art_svp_intersect.c (art_svp_writer_rewind_add_point): Fixed
bbox computation.
(art_svp_intersector): Handle degenerate case where input
SVP has 0 segments.
* art_svp_intersect.h: Moved definition of art_svp_intersector
inside #ifdef __cplusplus, so it links properly against C++
2001-10-09 Raph Levien <raph@pixel.artofcode.com>
* art_svp_intersect.c (art_svp_intersect_break): Handle
case when break y equals sweep line correctly. Also adds
first try at winding number sanitychecker, but that makes
too many false positives.
2001-10-07 Raph Levien <raph@pixel.artofcode.com>
* art_svp.c (EPSILON): Set to zero if new intersector is
in use - we want svp's to be in strict sorted order.
* art_svp_intersect.c (art_svp_intersect_test_cross): Explicitly
check that top points are equal, and swap immediately if b is out
of order.
(art_svp_intersect_horiz): Break segments that intersect
horizontal lines. Now passes "two squares with offset" test.
2001-10-05 Raph Levien <raph@pixel.artofcode.com>
* art_svp_intersect.c: Major changes to accommodate
horizontal lines. Intersections of horizontal lines
aren't fully processed, but should work a lot better
than before.
* testart.c: Minor tweaks. testpat now frees memory
so it can be run under memprof to detect leaks.
2001-10-03 Raph Levien <raph@pixel.artofcode.com>
* art_svp_intersect.c (art_svp_intersect_advance_cursor):
Made test_cross for inserted segments common between
intersection processing and cursor advance, and also took
care of a case that hadn't been handled before. Also added
invariant sanitychecker for debugging purposes.
2001-10-02 Raph Levien <raph@pixel.artofcode.com>
* art_svp_ops.c: ART_USE_NEW_INTERSECTOR variants of svp
ops changed to do shallow free of merged svp.
2001-10-01 Raph Levien <raph@acm.org>
* art_svp_intersect.c:
* art_svp_intersect.h:
* Makefile.am:
* art_misc.h:
* art_svp_wind.h: First commit of new intersector code. It is
turned off by default, but can be enabled by #defining
ART_USE_NEW_INTERSECTOR in art_misc.h.
* art_svp_ops.c: Make svp ops use new intersector if enabled.
* art_svp_vpath_stroke.c: Make vpath stroking use new intersector
if enabled.
* testart.c: New test case for intersector.
Wed Sep 26 03:48:13 2001 George Lebl <jirka@5z.com>
* Release 2.3.6
Wed Sep 26 03:11:40 2001 George Lebl <jirka@5z.com>
* gen_art_config.c: Fix 64bit issues, cast sizeof return when
using %d to print it.
2001-09-13 Havoc Pennington <hp@redhat.com>
* Makefile.am: rename library to libart_lgpl_2
* libart-2.0.pc.in (Cflags): move includes
* libart-config.in: move includes
* Makefile.am: delete libartConf.sh, rename libart-config
(EXTRA_DIST): don't install m4 files
(libart_lgplincdir): move headers
2001-08-03 Michael Meeks <michael@ximian.com>
* Version 2.3.5 for the API freeze.
2001-07-12 Darin Adler <darin@bentspoon.com>
* art_affine.c: (art_affine_expansion): Fix handling of
negative numbers. We ran into this bug a while back when
figuring out why librsvg couldn't handle certain svg files.
2001-07-12 Darin Adler <darin@bentspoon.com>
* art_misc.h: Change art_expand macro so it's a single
statement, using the do while (0) trick, which gets rid
of some warnings.
* art_pixbuf.c: Add a missing include.
* art_vpath_svp.c: (art_vpath_from_svp): Initialize a
variable to avoid a compiler warning.
* gen_art_config.c: Add a missing include.
2001-03-24 Martin Baulig <baulig@suse.de>
Applied the patch from Alexander Larsson which was sitting
in gnome-libs/patches/libart.diff since February.
[FIXME: Alex, can you please provide a ChangeLog?])
* art_rgb_a_affine.[ch]: New files.
2001-01-07 Hans Breuer <Hans@Breuer.Org>
* art_misc.c : embryonic change to use libart_lgpl on win32
* libart.def : new file, exported functions for win32 dll
* makefile.msc : handwritten for MSVC compiler
2000-09-30 Martin Baulig <baulig@suse.de>
* libart-2.0.pc.in: Provide pkg-config script.
* configure.in: Create libart-2.0.pc from libart-2.0.pc.in.
* Makefile.am (pkgconfig_DATA): Install the libart-2.0.pc
script in `$(libdir)/pkgconfig'.
2000-08-15 Raph Levien <raph@acm.org>
* art_render.c (art_render_image_solid_negotiate): Only
sets ART_IMAGE_SOURCE_CAN_COMPOSITE when a compositing
callback is selected. Previously was causing segfaults on
non-alpha images. Thanks to Leonard Rosenthol for spotting
the bug.
Fri Jun 30 22:56:58 2000 Raph Levien <raph@acm.org>
* art_render.c (art_render_composite): Fixed a bug that caused
it to ignore the alpha setting. Also art_render_composite_8().
2000-06-01 John Sullivan <sullivan@eazel.com>
* art_svp_render_aa.c: (art_svp_render_aa_iter_step):
Made it build by correcting struct member name from
Raph's previous checkin.
Wed May 31 11:10:58 2000 Raph Levien <raph@acm.org>
* art_svp_render_aa.c (art_svp_render_aa_iter_step): Updated
n_steps_max in iter structure after steps reallocation.
Tue May 30 10:33:13 2000 Raph Levien <raph@acm.org>
* art_svp_render_aa.c (art_svp_render_aa_iter_step): Fixed not
updating iter->steps when steps gets reallocated.
2000-05-30 Pavel Cisler <pavel@eazel.com>
* art_rgba.c:
Make it build -- fix a broken include.
Tue May 30 00:09:21 2000 Raph Levien <raph@acm.org>
* art_render_gradient.c (art_render_gradient_setpix): Fixed
an off-by-one loop error.
Mon May 29 15:00:39 2000 Raph Levien <raph@acm.org>
* Makefile.am: Moved relevant .h files into HEADERS stanza.
Mon May 29 13:48:49 2000 Raph Levien <raph@acm.org>
This is a fairly major commit, as it adds both the new, modular
rendering architecture and gradients. Quite a bit of the code
feels like "reference code" now, in that it is (hopefully)
correct, but not necessarily very fast. In addition, there remain
a few things not done, including the use of SVP's as non-driver
mask sources. AlphaGamma and filter level also remain
unimplemented. No compositing modes other than ART_NORMAL are
implemented. All in good time!
* configure.in: added -Wmissing-prototypes flag. Bumped version
number to 2.3.0.
* art_render.h:
* art_render.c: Added new rendering architecture.
* art_render_svp.h:
* art_render_svp.c: Added renderers to use SVP's as mask
sources in new rendering architecture.
* art_render_gradient.h:
* art_render_gradient.c: Added linear and radial gradients
as image sources in new rendering architecture.
* art_rgba.h:
* art_rgba.c: Added functions for manipulating and compositing
RGBA pixels.
* art_svp_wind.c: Added static to trap_epsilon(), #ifdef'd out
traverse().
* art_uta_ops.c: Added #include "art_uta_ops.h".
* art_uta_rect.c: Added #include "art_uta_rect.h".
* art_uta_svp.h: fixed __ART_UTA_SVP_H__ name.
* art_misc.h: Added ART_GNUC_NORETURN attribute, added that
to the prototype for art_die(). Added "static" to function
declarations to avoid warnings when compiled with
* testart.c: Added gradient test.
Thu May 25 23:30:39 2000 Raph Levien <raph@acm.org>
* art_svp_render_aa.h:
* art_svp_render_aa.c: Added art_svp_render_aa_iter functions,
suitable for iterative rendering of an svp, one scan line at a
time.
* configure.in: Bumped version to 2.2.0.
Tue May 16 15:03:35 2000 Raph Levien <raph@acm.org>
* art_rgb_pixbuf_affine.c: Included corresponding .h file.
* art_rgb_pixbuf_affine.h: Put recursive #includes inside
LIBART_COMPILATION test.
* art_gray_svp.c:
* art_rgb_svp.c: Explicit casts for callback data. Also removed
"render the steps into tmpbuf" comment.
* gen_art_config.c:
* Makefile.am:
* configure.in: Added code to automatically generate an
art_config.h file, to be installed in libart's include dir. This
file defines ART_SIZEOF_{CHAR,SHORT,INT,LONG} and art_u{8,16,32}.
* art_misc.h: Moved definition of art_u8 and art_u32 into
art_config.h. Added GCC printf format attributes.
* art_svp_wind.c (traverse): Fixed UMR bug here. The function
isn't actually used, so it's just for cleanliness.
2000-04-18 Lauris Kaplinski <lauris@ariman.ee>
* art_affine.c (art_affine_to_string): Replaced snprinf with
art_ftoa to avoid localisation of generated numbers
2000-04-18 ERDI Gergo <cactus@cactus.rulez.org>
* art_rgb_pixbuf_affine.h: Included the ArtPixBuf declaration
Fri Apr 14 16:33:55 2000 Raph Levien <raph@acm.org>
* art_svp_wind.c (art_svp_uncross, art_svp_rewind_uncrossed):
Fixed uninitialized memory reads when inserting new segment into
active_segs.
* art_bpath.c (art_bpath_affine_transform): Made it avoid
potential uninitialized memory reads when not all the coordinates
are needed. Thanks to Morten Welinder for spotting both of these
problems.
2000-04-05 Raph Levien <raph@gimp.org>
* art_svp_wind.c: Make "colinear" warnings go to stderr instead
of stdout. Of course, when I finish the new intersector, these
will go away entirely.
2000-04-04 Raph Levien <raph@gimp.org>
* art_uta_vpath.c (art_uta_add_line): Fixed bug that was causing
segfaults on alphas. Thanks to msw for localizing it.
2000-01-17 Raph Levien <raph@gimp.org>
* art_svp_vpath_stroke.c (art_svp_vpath_stroke): Typo in api
header (thanks rak).
2000-01-16 Timur Bakeyev <timur@gnu.org>
* autoconf.sh: Instead of jumping between srdir and builddir just process
all the auto* staff in srcdir. In fact, just saying the same things in
other words.
2000-01-10 Elliot Lee <sopwith@redhat.com>
* Makefile.am, *.h: Add rather bad hacks to the header files to allow compilation
* Makefile.am: Distribute libart-config.in
2000-01-09 Raph Levien <raph@gimp.org>
art_rgb_pixbuf_affine.c, art_rgb_rgba_affine.c, art_rgb_svp.c,
art_svp.c, art_svp_ops.c, art_svp_point.c, art_svp_render_aa.c,
art_svp_vpath.c, art_svp_vpath_stroke.c, art_svp_wind.c,
art_uta.c, art_uta_ops.c, art_uta_rect.c, art_uta_svp.c,
art_uta_vpath.c, art_vpath.c, art_vpath_bpath.c, art_vpath_dash.c,
art_vpath_svp.c: Added API documentation.
Fri Sep 24 17:53:21 1999 Raph Levien <raph@acm.org>
* art_svp_render_aa.c (art_svp_render_insert_active): Avoid
reading undefined memory (thanks to Morten Welinder).
1999-09-19 Raph Levien <raph@gimp.org>
* art_pixbuf.c (art_pixbuf_duplicate): Added a duplicate function
at the request of Michael Meeks.
1999-09-11 Raph Levien <raph@gimp.org>
* art_affine.c (art_affine_to_string): Tightened the predicate for
matching rotate-only affines, which was too weak. Thanks to lewing
for spotting it!
1999-09-01 Raph Levien <raph@gimp.org>
* art_affine.c, art_alphagamma.c, art_bpath.c, art_gray_svp.c,
art_misc.c, art_pixbuf.c, art_rect.c, art_rect_svp.c,
art_rect_uta.c, art_rgb.c, art_rgb_affine.c,
art_rgb_bitmap_affine.c: Updates to api doc headers.
1999-08-24 Raph Levien <raph@gimp.org>
* art_affine.c, art_alphagamma.c, art_alphagamma.h, art_bpath.c,
art_bpath.h, art_gray_svp.c, art_misc.c, art_pixbuf.c,
art_pixbuf.h, art_point.h, art_rect.c, art_rect.h: Added api
documentation headers.
* testart.c: Added "dash" test, for testing the vpath_dash
functions.
* art_rgb_pixbuf_affine.h: Fixed the #ifdef for conditional
inclusion. Thanks to Kristian Hogsberg Kristensen for spotting
the bug.
1999-08-24 Raph Levien <raph@gimp.org>
* art_svp_render_aa.c (art_svp_render_aa): Added some tests to
avoid NaN for infinite slopes, which were causing problems on
Alphas. Closes bug #1966.
1999-08-20 Federico Mena Quintero <federico@redhat.com>
* configure.in: Fixed library's libtool version number.
1999-08-03 Larry Ewing <lewing@gimp.org>
* art_vpath_dash.c (art_vpath_dash): fix a bug/typo that was causing
certain paths to loop infinitely.
1999-07-28 Raph Levien <raph@gimp.org>
* art_vpath_dash.[ch]: Added a function to add a dash style
to vpaths. It is tested, but has a couple of rough edges (see
code for details).
* testart.c: added tests for the new vpath_dash functionality.
* Makefile.am: added art_vpath_dash.[ch] files.
1999-07-26 Raph Levien <raph@gimp.org>
* art_rgb.c (art_rgb_fill_run): fixed incorrect test for
big-endianness. Thanks to Michael Zucchi for spotting it.
Fri Jul 16 23:42:59 1999 Tim Janik <timj@gtk.org>
* art_affine.c (art_affine_flip): flip translation matrixes as well, by
inverting matrix[4] if (horz) and inverting matrix[5] if (vert).
Fri Jul 16 23:03:26 1999 Tim Janik <timj@gtk.org>
* art_pixbuf.[hc]: deprecated art_pixbuf_free_shallow(), people should
always free pixbufs with art_pixbuf_free() and use the _dnotify variants
for specific destruction behaviour.
added art_pixbuf_new_rgb_dnotify() and art_pixbuf_new_rgba_dnotify()
which allow for a destruction notification function. (this involved
adding two extra pointers to the ArtPixBuf structure, and removal of
the recently introduced int flags field).
Mon Jul 12 01:13:23 1999 Tim Janik <timj@gtk.org>
* art_affine.[hc]: added art_affine_equal(), which checks two
matrixes for equality within grid alignment.
Fri Jul 9 17:50:19 1999 Tim Janik <timj@gtk.org>
* art_affine.[hc]: added art_affine_flip() to flip a matrix horizontally
and/or vertically, or just copy it.
added art_affine_shear() to setup a shearing matrix.
Tue Jul 6 19:03:39 1999 Tim Janik <timj@gtk.org>
* art_pixbuf.h: added an int flags; member to the end of the
structure, it currently only holds information about whether the
pixels member should be freed. (raph: i think flags is more generic
than free_pixels, so we can reuse that field if further demands popup
in the future).
* art_pixbuf.c:
(art_pixbuf_new_const_rgba):
(art_pixbuf_new_const_rgb): new functions that prevent the pixels
member from being freed upon art_pixbuf_free ().
(art_pixbuf_free): only free the pixels member if it is non-NULL and
the PIXBUF_FLAG_DESTROY_PIXELS is set.
1999-07-02 Raph Levien <raph@gimp.org>
* art_vpath_bpath.c (art_vpath_render_bez): Bad bad uninitialized
variables.
* configure.in: added compile warnings. Guess why :)
1999-06-28 Raph Levien <raph@gimp.org>
* art_svp_point.h:
* art_svp_point.c: Added methods for insideness and distance
testing, very useful for ::point methods in canvas items.
* testart.c: test code to exercise the art_svp_point functions.
* Makefile.am: Additional entries for art_svp_point.
1999-06-28 Raph Levien <raph@gimp.org>
* art_svp_render_aa.c (art_svp_render_aa): Subtle boundary
case in realloc code -- was causing nasty segfaults.
Wed Jun 23 15:05:43 1999 Raph Levien <raph@gimp.org>
* art_rgb_svp.c (art_rgb_svp_alpha_opaque_callback): Missed a
case in the anti-segfault crusade. Thanks lewing!
Wed Jun 23 11:16:42 1999 Raph Levien <raph@gimp.org>
* art_rgb_svp.c: Made these routines so they won't segfault even
if alpha is out of range. Of course, that begs the question of
fixing the render routines so they won't _make_ alpha go out of
range, but all in good time.
Fri Jun 18 17:32:34 1999 Raph Levien <raph@acm.org>
* art_vpath_bpath.c (art_bez_path_to_vec): Switched to a new
adaptive subdivision algorithm, which (finally!) takes flatness
into account. This should result in both smoother curves and
faster operation.
Sun Jun 13 21:07:20 1999 Raph Levien <raph@gimp.org>
* art_svp_wind.c (art_svp_rewind_uncrossed): Made the winding
rule logic even more correct :). I somehow missed the fact that
a clockwise path should be given a winding number of zero;
last night's commit tried to make it -1 (which worked for the
test cases I was using).
Sun Jun 13 01:23:14 1999 Raph Levien <raph@gimp.org>
* art_svp_wind.c (art_svp_rewind_uncrossed): Change to winding
rule logic so that it correctly handles the case where the
leftmost segment is negative.
* Makefile.am (libart_lgplinc_HEADERS): made art_svp_wind.h
a public headerfile. This is needed for the bpath canvas item.
I'm not sure this is the correct way to do it, but it will do
for now.
* art_vpath_bpath.h:
* art_vpath_bpath.c (art_bez_path_to_vec): Added const to arg.
* art_vpath_bpath.h: Embarrassing typo.
* art_bpath.h: Minor tweaks to the #include paths. It is now
consistent with the other header files.
Wed Jun 9 20:24:45 1999 Raph Levien <raph@gimp.org>
* art_svp_vpath_stroke.c: Added all remaining line join and cap
types, including round, which takes flatness into account. Several
new internal functions (art_svp_vpath_stroke_arc) and added
flatness argument to a few internal functions. I might want to
change the BEVEL join type to MITER for very small turn angles
(i.e. within a flatness threshold) for efficiency.
* art_misc.h: Added M_SQRT2 constant.
Wed Jun 2 21:56:30 1999 Raph Levien <raph@gimp.org>
* art_svp_vpath_stroke.c (art_svp_vpath_stroke_raw): Made the
closed path detection capable of PostScript semantics (i.e. it
now senses the difference between ART_MOVETO and ART_MOVETO_OPEN).
* art_svp_vpath_stroke.c (art_svp_vpath_stroke_raw): it now
filters out successive points that are (nearly) coincident. This
fixes some of the crashes and hangs, including Tim Janik's
singularity (trying to stroke MOVETO 50, 50; LINETO 50, 50; END).
* art_svp_wind.c (art_svp_rewind_uncrossed): added a test to
correctly handle empty input svp's.
* art_svp_wind.c (art_svp_uncross): added a test to correctly
handle empty input svp's.
Sun Jan 17 20:53:40 1999 Jeff Garzik <jgarzik@pobox.com>
* art_affine.c:
Include string.h for memcpy.
* art_svp_vpath.c:
Remove conflicting static func definition.
* art_uta_svp.c:
Include art_vpath_svp.h for func definition.
Mon Jan 4 12:47:47 1999 Raph Levien <raph@acm.org>
* art_bpath.c (art_bpath_affine_transform): Stupid misnaming
of this function (forgot the "art_").
Thu Dec 31 09:04:23 1998 Raph Levien <raph@gimp.org>
* art_affine.c (art_affine_rectilinear): Added this function.
* art_rect.c (art_drect_affine_transform): Corrected the name (it
was right in the .h). Also made it work with non-rectilinear
transforms, while I was at it.
Thu Dec 17 11:58:24 1998 Raph Levien <raph@acm.org>
* art_alphagamma.h:
* art_alphagamma.c: The real code for alphagamma.
Wed Dec 16 14:18:46 1998 Raph Levien <raph@gimp.org>
* art_alphagamma.h:
* art_alphagamma.c: Added. At present, it only contains a dummy
stub. When the real code is added, it supports doing alpha
compositing in a gamma-corrected color space (suppressing
jaggies).
* art_pixbuf.h:
* art_pixbuf.c: Added. This is a virtualization layer over
a few different kinds of image formats.
* art_rgb_pixbuf_affine.h:
* art_rgb_pixbuf_affine.c: Added. Supports compositing of
generic images over an rgb buffer.
* art_affine.h:
* art_affine.c (art_affine_expansion): Added this function,
which reports the exact scale factor in the case of rotation,
scaling, and transformation (an approximate number in the
case of shearing or anamorphic distortion).
* art_misc.h:
* art_misc.c (art_warn): Added.
* art_rgb_affine.h:
* art_rgb_affine.c: Added alphagamma argument (not yet implemented).
* art_rgb_affine_private.c: Fixed typo bug that was causing
repaint problems for nonsquare images.
* art_rgb_bitmap_affine.h:
* art_rgb_bitmap_affine.c: Major speed improvement, probably fixed
correctness while I was at it. Added alphagamma argument (not yet
implemented).
* art_rgb_svp.h:
* art_rgb_svp.c: Added alphagamma argument (only implemented
in aa case, not yet alpha case).
* art_vpath.c: increased perturbation to 2e-3, because the old
value (1e-6) was too small.
* testart.c: added alphagamma.
* Makefile.am: added new files
Sun Dec 27 21:45:03 1998 Raph Levien <raph@gimp.org>
* art_rect.h:
* art_rect.c: Added DRect versions of the basic ops (double
rather than int).
* art_rect_svp.h:
* art_rect_svp.c: Added. This computes the bounding box of
an svp.
Wed Dec 16 14:18:46 1998 Raph Levien <raph@gimp.org>
* art_alphagamma.h:
* art_alphagamma.c: Added. At present, it only contains a dummy
stub. When the real code is added, it supports doing alpha
compositing in a gamma-corrected color space (suppressing
jaggies).
* art_pixbuf.h:
* art_pixbuf.c: Added. This is a virtualization layer over
a few different kinds of image formats.
* art_rgb_pixbuf_affine.h:
* art_rgb_pixbuf_affine.c: Added. Supports compositing of
generic images over an rgb buffer.
* art_affine.h:
* art_affine.c (art_affine_expansion): Added this function,
which reports the exact scale factor in the case of rotation,
scaling, and transformation (an approximate number in the
case of shearing or anamorphic distortion).
* art_misc.h:
* art_misc.c (art_warn): Added.
* art_rgb_affine.h:
* art_rgb_affine.c: Added alphagamma argument (not yet implemented).
* art_rgb_affine_private.c: Fixed typo bug that was causing
repaint problems for nonsquare images.
* art_rgb_bitmap_affine.h:
* art_rgb_bitmap_affine.c: Major speed improvement, probably fixed
correctness while I was at it. Added alphagamma argument (not yet
implemented).
* art_rgb_svp.h:
* art_rgb_svp.c: Added alphagamma argument (only implemented
in aa case, not yet alpha case).
* art_vpath.c: increased perturbation to 2e-3, because the old
value (1e-6) was too small.
* testart.c: added alphagamma.
* Makefile.am: added new files
Mon Dec 14 00:16:53 1998 Raph Levien <raph@gimp.org>
* art_affine.c (art_affine_to_string): re-added the "scale" method
that was accidentally deleted before check-in.
* Makefile.am: added new files
Sun Dec 13 00:52:39 1998 Raph Levien <raph@gimp.org>
* art_affine.h:
* art_affine.c: Added. Everything you ever wanted to do with an
affine transform. Especially check the functions that generate
concise PostScript strings for affine transforms.
* art_filterlevel.h: A simple enum for selecting filtering
style.
* art_rgb_affine.h:
* art_rgb_affine.c (art_rgb_affine): Added. This function
composites an (opaque) rgb image over an rgb pixel buffer. At
present, it's slow and only nearest neighbor filtering is enabled.
* art_rgb_rgba_affine.h:
* art_rgb_rgba_affine.c: Analogous, but for compositing rgba
images.
* art_rgb_bitmap_affine.h:
* art_rgb_bitmap_affine.c: Analogous, but for compositing bitmap
images.
* art_rgb_affine_private.c (art_rgb_affine_run): Added. This is
a common function used by all the rgb_affine modules to move
testing for source image bbox out of the inner loop.
* Makefile.am: added the new files
* testart.c: exercise the image compositors
Wed Dec 9 23:36:35 1998 Raph Levien <raph@gimp.org>
* art_vpath.c (art_vpath_perturb): Made it deal correctly
with closed paths (the MOVETO and closing LINETO have to
agree).
* art_svp_wind.c: Made the bbox calculations for the resulting
svp's correct.
* art_svp.h:
* art_svp.c: The art_svp_seg_compare function moved here, because
it's required in art_svp_ops.
* art_svp.c (art_svp_add_segment): It now does bbox calculations.
* art_svp_ops.h:
* art_svp_ops.c: Added. Populated with basic union, intersection,
and diff functions.
* art_vpath_svp.h:
* art_vpath_svp.c: Added. Populated with a function to convert
from sorted to unsorted vector paths
* Makefile.am: added the new files
* testart.c: exercise the stroke outline and vector path
operations.
1998-12-08 Herbert Valerio Riedel <hvr@hvrlab.ml.org>
* art_svp_wind.c: added #include <string.h> for memcpy()
Sun Dec 6 22:15:12 1998 Raph Levien <raph@gimp.org>
* art_svp_wind.[ch], art_svp_vpath_stroke.[ch]: Added, but it
doesn't work yet. These will do stroke outline and basic
vector ops like union, intersect, etc.
* art_svp_render_aa.c: Added a simple speedup based on bbox
culling. I will want to do more speedups, but none of this is
necessary for the freeze.
* art_svp_vpath.c: Fixed some bugs in the art_svp_from_vpath in
cases where there is more than one subpath.
* art_vpath.h:
* art_vpath.c (art_vpath_perturb): Added this function. This will
help cheat as long as the basic vector ops have numerical
stability problems.
Fri Dec 4 18:00:38 1998 Raph Levien <raph@gimp.org>
* art_svp_render_aa.c (art_svp_render_aa): Changed the api
slightly, to guarantee that the steps are all within the range
from x0 (inclusive) to x1 (exclusive).
* art_gray_svp.c, art_gray_svp.h: Added. Populated with functions
to render into a simple graymap.
* art_rgb.c, art_rgb.c: Added. Populated with fill_run and
run_alpha methods.
* art_rgb_svp.c, art_rgb_svp.h: Added. Populated with functions to
render into an RGB buffer, and to composite over an RGB buffer.
* Makefile.am: added art_gray_svp, art_rgb, and art_rgb_svp.
* testart.c: test the color and layered rendering.
Mon Nov 30 01:30:25 1998 Raph Levien <raph@gimp.org>
* testart.c: added vector path rendering stuff. Some of it needs
to go out of the test framework and into the module, but the
api hasn't settled down entirely yet (in the real code, all
x's in the step field are within bounds).
* art_svp_render_aa.c, art_svp_render_aa.c.h: added.
* art_svp_vpath.c, art_svp_vpath.h: added.
* art_pathcode.h: added ART_MOVETO_OPEN (libart uses an
ART_MOVETO_OPEN code at the beginning to indicate an open path,
while PostScript uses the lack of a closepath at the end).
* art_vpath_bpath.c, art_vpath_bpath.h: fixed it up, added
flatness arg to api.
* Makefile.am: added new source files.
Wed Nov 25 17:19:44 1998 Raph Levien <raph@gimp.org>
* art_svp.h, art_svp.c: added, basic constructors for sorted
vector paths.
Sun Nov 22 23:21:09 1998 Raph Levien <raph@gimp.org>
* Makefile.am (libart_lgplincdir): Fixed stupid bug in naming of
the variable.
Sun Nov 22 21:41:13 1998 Raph Levien <raph@gimp.org>
* art_uta_vpath.c: moved art_uta_union into art_uta_ops.
* art_uta_ops.[ch]: added, populated with art_uta_union.
Thu Nov 19 00:19:40 1998 Raph Levien <raph@gimp.org>
* libartConf.sh.in: added
* Makefile.am: added creation of libartConf.sh, added -version-info
* configure.in: added LIBART_VERSION_INFO, support for libartConf.sh
* libart.m4: updated version history :)
Wed Nov 18 18:15:20 1998 Raph Levien <raph@gimp.org>
* configure.in (LIBART_VERSION): set this, so that libart-config
--version now works.
Wed Nov 18 16:50:58 1998 Raph Levien <raph@gimp.org>
* libart.m4: added (just copied from esound)
* configure.in, Makefile.am: added support for libart-config
* libart-config.in: added (mostly copied from esound)
Tue Nov 10 12:43:30 1998 Raph Levien <raph@acm.org>
* Getting the library in shape for initial checkin to CVS.

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noinst_PROGRAMS = testart testuta gen_art_config
bin_SCRIPTS = \
libart2-config
BUILT_SOURCES = art_config.h
art_config.h: gen_art_config
./gen_art_config > art_config.h
EXTRA_DIST = \
libart-config.in \
libart-2.0.pc.in
lib_LTLIBRARIES = libart_lgpl_2.la
libart_lgpl_2_la_SOURCES = \
art_affine.c \
art_alphagamma.c \
art_bpath.c \
art_gray_svp.c \
art_misc.c \
art_pixbuf.c \
art_rect.c \
art_rect_svp.c \
art_rect_uta.c \
art_render.c \
art_render_gradient.c \
art_render_svp.c \
art_rgb.c \
art_rgb_affine.c \
art_rgb_affine_private.c \
art_rgb_affine_private.h \
art_rgb_bitmap_affine.c \
art_rgb_pixbuf_affine.c \
art_rgb_rgba_affine.c \
art_rgb_a_affine.c \
art_rgba.c \
art_rgb_svp.c \
art_svp.c \
art_svp_intersect.c \
art_svp_ops.c \
art_svp_point.c \
art_svp_render_aa.c \
art_svp_vpath.c \
art_svp_vpath_stroke.c \
art_svp_wind.c \
art_uta.c \
art_uta_ops.c \
art_uta_rect.c \
art_uta_vpath.c \
art_uta_svp.c \
art_vpath.c \
art_vpath_bpath.c \
art_vpath_dash.c \
art_vpath_svp.c \
libart-features.c
libart_lgpl_2_la_LDFLAGS = -version-info @LIBART_VERSION_INFO@
libart_lgplincdir = $(includedir)/libart-2.0/libart_lgpl
libart_lgplinc_HEADERS = \
art_affine.h \
art_alphagamma.h \
art_bpath.h \
art_config.h \
art_filterlevel.h \
art_gray_svp.h \
art_misc.h \
art_pathcode.h \
art_pixbuf.h \
art_point.h \
art_rect.h \
art_rect_svp.h \
art_rect_uta.h \
art_render.h \
art_render_gradient.h \
art_render_svp.h \
art_rgb.h \
art_rgb_affine.h \
art_rgb_bitmap_affine.h \
art_rgb_pixbuf_affine.h \
art_rgb_rgba_affine.h \
art_rgb_a_affine.h \
art_rgb_svp.h \
art_rgba.h \
art_svp.h \
art_svp_intersect.h \
art_svp_ops.h \
art_svp_point.h \
art_svp_render_aa.h \
art_svp_vpath.h \
art_svp_vpath_stroke.h \
art_svp_wind.h \
art_uta.h \
art_uta_ops.h \
art_uta_rect.h \
art_uta_vpath.h \
art_uta_svp.h \
art_vpath.h \
art_vpath_bpath.h \
art_vpath_dash.h \
art_vpath_svp.h \
libart.h \
libart-features.h
INCLUDES = -I$(top_srcdir) -I$(top_builddir) -DLIBART_COMPILATION
DEPS = $(top_builddir)/libart_lgpl_2.la
LDADDS = $(top_builddir)/libart_lgpl_2.la
testart_SOURCES=testart.c
testart_LDFLAGS =
testart_DEPENDENCIES = $(DEPS)
testart_LDADD = $(LDADDS) -lm
testuta_SOURCES=testuta.c
testuta_LDFLAGS =
testuta_DEPENDENCIES = $(DEPS)
testuta_LDADD = $(LDADDS) -lm
tests: testart testuta
pkgconfigdir = $(libdir)/pkgconfig
pkgconfig_DATA = libart-2.0.pc
libart2-config: libart-config
cp -f libart-config libart2-config

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Please see http://www.levien.com/libart/ for the latest news.

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This is the LGPL'd component of libart. All functions needed for
running the Gnome canvas, and for printing support, will be going in
here. The GPL'd component will be getting various enhanced functions
for specific applications.
Libart is free software. It is also for sale. For information about
licensing libart, please contact Raph Levien
<raph@acm.org>. Contributions to the codebase are also very welcome,
but the copyright must be assigned in writing to preserve the
licensing flexibility.
For more information about libart, see the web page:
http://www.levien.com/libart/

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Welcome to the libart source tree!
This code is being developed in a "free software for sale"
model. Thus, it's available under a free software license (LGPL for
this module), but I'm also requesting that for all changes to the code
the copyright gets assigned back to me.
So if you want to contribute, please do, but contact me about getting
the copyright assigned. Otherwise, I will have to back your changes
out.
Thanks!
Raph Levien <raph@acm.org>

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#undef PACKAGE
#undef VERSION

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Simple manipulations with affine transformations */
#include <math.h>
#include <stdio.h> /* for sprintf */
#include <string.h> /* for strcpy */
#include "art_misc.h"
#include "art_point.h"
#include "art_affine.h"
/* According to a strict interpretation of the libart structure, this
routine should go into its own module, art_point_affine. However,
it's only two lines of code, and it can be argued that it is one of
the natural basic functions of an affine transformation.
*/
/**
* art_affine_point: Do an affine transformation of a point.
* @dst: Where the result point is stored.
* @src: The original point.
@ @affine: The affine transformation.
**/
void
art_affine_point (ArtPoint *dst, const ArtPoint *src,
const double affine[6])
{
double x, y;
x = src->x;
y = src->y;
dst->x = x * affine[0] + y * affine[2] + affine[4];
dst->y = x * affine[1] + y * affine[3] + affine[5];
}
/**
* art_affine_invert: Find the inverse of an affine transformation.
* @dst: Where the resulting affine is stored.
* @src: The original affine transformation.
*
* All non-degenerate affine transforms are invertible. If the original
* affine is degenerate or nearly so, expect numerical instability and
* very likely core dumps on Alpha and other fp-picky architectures.
* Otherwise, @dst multiplied with @src, or @src multiplied with @dst
* will be (to within roundoff error) the identity affine.
**/
void
art_affine_invert (double dst[6], const double src[6])
{
double r_det;
r_det = 1.0 / (src[0] * src[3] - src[1] * src[2]);
dst[0] = src[3] * r_det;
dst[1] = -src[1] * r_det;
dst[2] = -src[2] * r_det;
dst[3] = src[0] * r_det;
dst[4] = -src[4] * dst[0] - src[5] * dst[2];
dst[5] = -src[4] * dst[1] - src[5] * dst[3];
}
/**
* art_affine_flip: Flip an affine transformation horizontally and/or vertically.
* @dst_affine: Where the resulting affine is stored.
* @src_affine: The original affine transformation.
* @horiz: Whether or not to flip horizontally.
* @vert: Whether or not to flip horizontally.
*
* Flips the affine transform. FALSE for both @horiz and @vert implements
* a simple copy operation. TRUE for both @horiz and @vert is a
* 180 degree rotation. It is ok for @src_affine and @dst_affine to
* be equal pointers.
**/
void
art_affine_flip (double dst_affine[6], const double src_affine[6], int horz, int vert)
{
dst_affine[0] = horz ? - src_affine[0] : src_affine[0];
dst_affine[1] = horz ? - src_affine[1] : src_affine[1];
dst_affine[2] = vert ? - src_affine[2] : src_affine[2];
dst_affine[3] = vert ? - src_affine[3] : src_affine[3];
dst_affine[4] = horz ? - src_affine[4] : src_affine[4];
dst_affine[5] = vert ? - src_affine[5] : src_affine[5];
}
#define EPSILON 1e-6
/* It's ridiculous I have to write this myself. This is hardcoded to
six digits of precision, which is good enough for PostScript.
The return value is the number of characters (i.e. strlen (str)).
It is no more than 12. */
static int
art_ftoa (char str[80], double x)
{
char *p = str;
int i, j;
p = str;
if (fabs (x) < EPSILON / 2)
{
strcpy (str, "0");
return 1;
}
if (x < 0)
{
*p++ = '-';
x = -x;
}
if ((int)floor ((x + EPSILON / 2) < 1))
{
*p++ = '0';
*p++ = '.';
i = sprintf (p, "%06d", (int)floor ((x + EPSILON / 2) * 1e6));
while (i && p[i - 1] == '0')
i--;
if (i == 0)
i--;
p += i;
}
else if (x < 1e6)
{
i = sprintf (p, "%d", (int)floor (x + EPSILON / 2));
p += i;
if (i < 6)
{
int ix;
*p++ = '.';
x -= floor (x + EPSILON / 2);
for (j = i; j < 6; j++)
x *= 10;
ix = floor (x + 0.5);
for (j = 0; j < i; j++)
ix *= 10;
/* A cheap hack, this routine can round wrong for fractions
near one. */
if (ix == 1000000)
ix = 999999;
sprintf (p, "%06d", ix);
i = 6 - i;
while (i && p[i - 1] == '0')
i--;
if (i == 0)
i--;
p += i;
}
}
else
p += sprintf (p, "%g", x);
*p = '\0';
return p - str;
}
#include <stdlib.h>
/**
* art_affine_to_string: Convert affine transformation to concise PostScript string representation.
* @str: Where to store the resulting string.
* @src: The affine transform.
*
* Converts an affine transform into a bit of PostScript code that
* implements the transform. Special cases of scaling, rotation, and
* translation are detected, and the corresponding PostScript
* operators used (this greatly aids understanding the output
* generated). The identity transform is mapped to the null string.
**/
void
art_affine_to_string (char str[128], const double src[6])
{
char tmp[80];
int i, ix;
#if 0
for (i = 0; i < 1000; i++)
{
double d = rand () * .1 / RAND_MAX;
art_ftoa (tmp, d);
printf ("%g %f %s\n", d, d, tmp);
}
#endif
if (fabs (src[4]) < EPSILON && fabs (src[5]) < EPSILON)
{
/* could be scale or rotate */
if (fabs (src[1]) < EPSILON && fabs (src[2]) < EPSILON)
{
/* scale */
if (fabs (src[0] - 1) < EPSILON && fabs (src[3] - 1) < EPSILON)
{
/* identity transform */
str[0] = '\0';
return;
}
else
{
ix = 0;
ix += art_ftoa (str + ix, src[0]);
str[ix++] = ' ';
ix += art_ftoa (str + ix, src[3]);
strcpy (str + ix, " scale");
return;
}
}
else
{
/* could be rotate */
if (fabs (src[0] - src[3]) < EPSILON &&
fabs (src[1] + src[2]) < EPSILON &&
fabs (src[0] * src[0] + src[1] * src[1] - 1) < 2 * EPSILON)
{
double theta;
theta = (180 / M_PI) * atan2 (src[1], src[0]);
art_ftoa (tmp, theta);
sprintf (str, "%s rotate", tmp);
return;
}
}
}
else
{
/* could be translate */
if (fabs (src[0] - 1) < EPSILON && fabs (src[1]) < EPSILON &&
fabs (src[2]) < EPSILON && fabs (src[3] - 1) < EPSILON)
{
ix = 0;
ix += art_ftoa (str + ix, src[4]);
str[ix++] = ' ';
ix += art_ftoa (str + ix, src[5]);
strcpy (str + ix, " translate");
return;
}
}
ix = 0;
str[ix++] = '[';
str[ix++] = ' ';
for (i = 0; i < 6; i++)
{
ix += art_ftoa (str + ix, src[i]);
str[ix++] = ' ';
}
strcpy (str + ix, "] concat");
}
/**
* art_affine_multiply: Multiply two affine transformation matrices.
* @dst: Where to store the result.
* @src1: The first affine transform to multiply.
* @src2: The second affine transform to multiply.
*
* Multiplies two affine transforms together, i.e. the resulting @dst
* is equivalent to doing first @src1 then @src2. Note that the
* PostScript concat operator multiplies on the left, i.e. "M concat"
* is equivalent to "CTM = multiply (M, CTM)";
*
* It is safe to call this function with @dst equal to @src1 or @src2.
**/
void
art_affine_multiply (double dst[6], const double src1[6], const double src2[6])
{
double d0, d1, d2, d3, d4, d5;
d0 = src1[0] * src2[0] + src1[1] * src2[2];
d1 = src1[0] * src2[1] + src1[1] * src2[3];
d2 = src1[2] * src2[0] + src1[3] * src2[2];
d3 = src1[2] * src2[1] + src1[3] * src2[3];
d4 = src1[4] * src2[0] + src1[5] * src2[2] + src2[4];
d5 = src1[4] * src2[1] + src1[5] * src2[3] + src2[5];
dst[0] = d0;
dst[1] = d1;
dst[2] = d2;
dst[3] = d3;
dst[4] = d4;
dst[5] = d5;
}
/**
* art_affine_identity: Set up the identity matrix.
* @dst: Where to store the resulting affine transform.
*
* Sets up an identity matrix.
**/
void
art_affine_identity (double dst[6])
{
dst[0] = 1;
dst[1] = 0;
dst[2] = 0;
dst[3] = 1;
dst[4] = 0;
dst[5] = 0;
}
/**
* art_affine_scale: Set up a scaling matrix.
* @dst: Where to store the resulting affine transform.
* @sx: X scale factor.
* @sy: Y scale factor.
*
* Sets up a scaling matrix.
**/
void
art_affine_scale (double dst[6], double sx, double sy)
{
dst[0] = sx;
dst[1] = 0;
dst[2] = 0;
dst[3] = sy;
dst[4] = 0;
dst[5] = 0;
}
/**
* art_affine_rotate: Set up a rotation affine transform.
* @dst: Where to store the resulting affine transform.
* @theta: Rotation angle in degrees.
*
* Sets up a rotation matrix. In the standard libart coordinate
* system, in which increasing y moves downward, this is a
* counterclockwise rotation. In the standard PostScript coordinate
* system, which is reversed in the y direction, it is a clockwise
* rotation.
**/
void
art_affine_rotate (double dst[6], double theta)
{
double s, c;
s = sin (theta * M_PI / 180.0);
c = cos (theta * M_PI / 180.0);
dst[0] = c;
dst[1] = s;
dst[2] = -s;
dst[3] = c;
dst[4] = 0;
dst[5] = 0;
}
/**
* art_affine_shear: Set up a shearing matrix.
* @dst: Where to store the resulting affine transform.
* @theta: Shear angle in degrees.
*
* Sets up a shearing matrix. In the standard libart coordinate system
* and a small value for theta, || becomes \\. Horizontal lines remain
* unchanged.
**/
void
art_affine_shear (double dst[6], double theta)
{
double t;
t = tan (theta * M_PI / 180.0);
dst[0] = 1;
dst[1] = 0;
dst[2] = t;
dst[3] = 1;
dst[4] = 0;
dst[5] = 0;
}
/**
* art_affine_translate: Set up a translation matrix.
* @dst: Where to store the resulting affine transform.
* @tx: X translation amount.
* @tx: Y translation amount.
*
* Sets up a translation matrix.
**/
void
art_affine_translate (double dst[6], double tx, double ty)
{
dst[0] = 1;
dst[1] = 0;
dst[2] = 0;
dst[3] = 1;
dst[4] = tx;
dst[5] = ty;
}
/**
* art_affine_expansion: Find the affine's expansion factor.
* @src: The affine transformation.
*
* Finds the expansion factor, i.e. the square root of the factor
* by which the affine transform affects area. In an affine transform
* composed of scaling, rotation, shearing, and translation, returns
* the amount of scaling.
*
* Return value: the expansion factor.
**/
double
art_affine_expansion (const double src[6])
{
return sqrt (fabs (src[0] * src[3] - src[1] * src[2]));
}
/**
* art_affine_rectilinear: Determine whether the affine transformation is rectilinear.
* @src: The original affine transformation.
*
* Determines whether @src is rectilinear, i.e. grid-aligned
* rectangles are transformed to other grid-aligned rectangles. The
* implementation has epsilon-tolerance for roundoff errors.
*
* Return value: TRUE if @src is rectilinear.
**/
int
art_affine_rectilinear (const double src[6])
{
return ((fabs (src[1]) < EPSILON && fabs (src[2]) < EPSILON) ||
(fabs (src[0]) < EPSILON && fabs (src[3]) < EPSILON));
}
/**
* art_affine_equal: Determine whether two affine transformations are equal.
* @matrix1: An affine transformation.
* @matrix2: Another affine transformation.
*
* Determines whether @matrix1 and @matrix2 are equal, with
* epsilon-tolerance for roundoff errors.
*
* Return value: TRUE if @matrix1 and @matrix2 are equal.
**/
int
art_affine_equal (double matrix1[6], double matrix2[6])
{
return (fabs (matrix1[0] - matrix2[0]) < EPSILON &&
fabs (matrix1[1] - matrix2[1]) < EPSILON &&
fabs (matrix1[2] - matrix2[2]) < EPSILON &&
fabs (matrix1[3] - matrix2[3]) < EPSILON &&
fabs (matrix1[4] - matrix2[4]) < EPSILON &&
fabs (matrix1[5] - matrix2[5]) < EPSILON);
}

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_AFFINE_H__
#define __ART_AFFINE_H__
#ifdef LIBART_COMPILATION
#include "art_point.h"
#else
#include <libart_lgpl/art_point.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
void
art_affine_point (ArtPoint *dst, const ArtPoint *src,
const double affine[6]);
void
art_affine_invert (double dst_affine[6], const double src_affine[6]);
/* flip the matrix, FALSE, FALSE is a simple copy operation, and
TRUE, TRUE equals a rotation by 180 degrees */
void
art_affine_flip (double dst_affine[6], const double src_affine[6],
int horz, int vert);
void
art_affine_to_string (char str[128], const double src[6]);
void
art_affine_multiply (double dst[6],
const double src1[6], const double src2[6]);
/* set up the identity matrix */
void
art_affine_identity (double dst[6]);
/* set up a scaling matrix */
void
art_affine_scale (double dst[6], double sx, double sy);
/* set up a rotation matrix; theta is given in degrees */
void
art_affine_rotate (double dst[6], double theta);
/* set up a shearing matrix; theta is given in degrees */
void
art_affine_shear (double dst[6], double theta);
/* set up a translation matrix */
void
art_affine_translate (double dst[6], double tx, double ty);
/* find the affine's "expansion factor", i.e. the scale amount */
double
art_affine_expansion (const double src[6]);
/* Determine whether the affine transformation is rectilinear,
i.e. whether a rectangle aligned to the grid is transformed into
another rectangle aligned to the grid. */
int
art_affine_rectilinear (const double src[6]);
/* Determine whether two affine transformations are equal within grid allignment */
int
art_affine_equal (double matrix1[6], double matrix2[6]);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_AFFINE_H__ */

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Some functions to build alphagamma tables */
#include <math.h>
#include "art_misc.h"
#include "art_alphagamma.h"
/**
* art_alphagamma_new: Create a new #ArtAlphaGamma.
* @gamma: Gamma value.
*
* Create a new #ArtAlphaGamma for a specific value of @gamma. When
* correctly implemented (which is generally not the case in libart),
* alpha compositing with an alphagamma parameter is equivalent to
* applying the gamma transformation to source images, doing the alpha
* compositing (in linear intensity space), then applying the inverse
* gamma transformation, bringing it back to a gamma-adjusted
* intensity space.
*
* Return value: The newly created #ArtAlphaGamma.
**/
ArtAlphaGamma *
art_alphagamma_new (double gamma)
{
int tablesize;
ArtAlphaGamma *alphagamma;
int i;
int *table;
art_u8 *invtable;
double s, r_gamma;
tablesize = ceil (gamma * 8);
if (tablesize < 10)
tablesize = 10;
alphagamma = (ArtAlphaGamma *)art_alloc (sizeof(ArtAlphaGamma) +
((1 << tablesize) - 1) *
sizeof(art_u8));
alphagamma->gamma = gamma;
alphagamma->invtable_size = tablesize;
table = alphagamma->table;
for (i = 0; i < 256; i++)
table[i] = (int)floor (((1 << tablesize) - 1) *
pow (i * (1.0 / 255), gamma) + 0.5);
invtable = alphagamma->invtable;
s = 1.0 / ((1 << tablesize) - 1);
r_gamma = 1.0 / gamma;
for (i = 0; i < 1 << tablesize; i++)
invtable[i] = (int)floor (255 * pow (i * s, r_gamma) + 0.5);
return alphagamma;
}
/**
* art_alphagamma_free: Free an #ArtAlphaGamma.
* @alphagamma: An #ArtAlphaGamma.
*
* Frees the #ArtAlphaGamma.
**/
void
art_alphagamma_free (ArtAlphaGamma *alphagamma)
{
art_free (alphagamma);
}

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other-licenses/libart_lgpl/art_alphagamma.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_ALPHAGAMMA_H__
#define __ART_ALPHAGAMMA_H__
/* Alphagamma tables */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#ifdef LIBART_COMPILATION
#include "art_misc.h"
#else
#include <libart_lgpl/art_misc.h>
#endif
typedef struct _ArtAlphaGamma ArtAlphaGamma;
struct _ArtAlphaGamma {
/*< private >*/
double gamma;
int invtable_size;
int table[256];
art_u8 invtable[1];
};
ArtAlphaGamma *
art_alphagamma_new (double gamma);
void
art_alphagamma_free (ArtAlphaGamma *alphagamma);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_SVP_H__ */

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other-licenses/libart_lgpl/art_bpath.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Basic constructors and operations for bezier paths */
#include <math.h>
#include "art_misc.h"
#include "art_bpath.h"
/**
* art_bpath_affine_transform: Affine transform an #ArtBpath.
* @src: The source #ArtBpath.
* @matrix: The affine transform.
*
* Affine transform the bezpath, returning a newly allocated #ArtBpath
* (allocated using art_alloc()).
*
* Result (x', y') = (matrix[0] * x + matrix[2] * y + matrix[4],
* matrix[1] * x + matrix[3] * y + matrix[5])
*
* Return value: the transformed #ArtBpath.
**/
ArtBpath *
art_bpath_affine_transform (const ArtBpath *src, const double matrix[6])
{
int i;
int size;
ArtBpath *new;
ArtPathcode code;
double x, y;
for (i = 0; src[i].code != ART_END; i++);
size = i;
new = art_new (ArtBpath, size + 1);
for (i = 0; i < size; i++)
{
code = src[i].code;
new[i].code = code;
if (code == ART_CURVETO)
{
x = src[i].x1;
y = src[i].y1;
new[i].x1 = matrix[0] * x + matrix[2] * y + matrix[4];
new[i].y1 = matrix[1] * x + matrix[3] * y + matrix[5];
x = src[i].x2;
y = src[i].y2;
new[i].x2 = matrix[0] * x + matrix[2] * y + matrix[4];
new[i].y2 = matrix[1] * x + matrix[3] * y + matrix[5];
}
else
{
new[i].x1 = 0;
new[i].y1 = 0;
new[i].x2 = 0;
new[i].y2 = 0;
}
x = src[i].x3;
y = src[i].y3;
new[i].x3 = matrix[0] * x + matrix[2] * y + matrix[4];
new[i].y3 = matrix[1] * x + matrix[3] * y + matrix[5];
}
new[i].code = ART_END;
new[i].x1 = 0;
new[i].y1 = 0;
new[i].x2 = 0;
new[i].y2 = 0;
new[i].x3 = 0;
new[i].y3 = 0;
return new;
}

57
other-licenses/libart_lgpl/art_bpath.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_BPATH_H__
#define __ART_BPATH_H__
#ifdef LIBART_COMPILATION
#include "art_point.h"
#include "art_pathcode.h"
#else
#include <libart_lgpl/art_point.h>
#include <libart_lgpl/art_pathcode.h>
#endif
/* Basic data structures and constructors for bezier paths */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef struct _ArtBpath ArtBpath;
struct _ArtBpath {
/*< public >*/
ArtPathcode code;
double x1;
double y1;
double x2;
double y2;
double x3;
double y3;
};
ArtBpath *
art_bpath_affine_transform (const ArtBpath *src, const double matrix[6]);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_BPATH_H__ */

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other-licenses/libart_lgpl/art_filterlevel.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_FILTERLEVEL_H__
#define __ART_FILTERLEVEL_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef enum {
ART_FILTER_NEAREST,
ART_FILTER_TILES,
ART_FILTER_BILINEAR,
ART_FILTER_HYPER
} ArtFilterLevel;
/* NEAREST is nearest neighbor. It is the fastest and lowest quality.
TILES is an accurate simulation of the PostScript image operator
without any interpolation enabled; each pixel is rendered as a tiny
parallelogram of solid color, the edges of which are implemented
with antialiasing. It resembles nearest neighbor for enlargement,
and bilinear for reduction.
BILINEAR is bilinear interpolation. For enlargement, it is
equivalent to point-sampling the ideal bilinear-interpolated
image. For reduction, it is equivalent to laying down small tiles
and integrating over the coverage area.
HYPER is the highest quality reconstruction function. It is derived
from the hyperbolic filters in Wolberg's "Digital Image Warping,"
and is formally defined as the hyperbolic-filter sampling the ideal
hyperbolic-filter interpolated image (the filter is designed to be
idempotent for 1:1 pixel mapping). It is the slowest and highest
quality.
Note: at this stage of implementation, most filter modes are likely
not to be implemented.
Note: cubic filtering is missing from this list, because there isn't
much point - hyper is just as fast to implement and slightly better
in quality.
*/
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_PATHCODE_H__ */

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other-licenses/libart_lgpl/art_gray_svp.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Render a sorted vector path into a graymap. */
#include <string.h> /* for memset */
#include "art_misc.h"
#include "art_svp.h"
#include "art_svp_render_aa.h"
#include "art_gray_svp.h"
typedef struct _ArtGraySVPData ArtGraySVPData;
struct _ArtGraySVPData {
art_u8 *buf;
int rowstride;
int x0, x1;
};
static void
art_gray_svp_callback (void *callback_data, int y,
int start, ArtSVPRenderAAStep *steps, int n_steps)
{
ArtGraySVPData *data = (ArtGraySVPData *)callback_data;
art_u8 *linebuf;
int run_x0, run_x1;
int running_sum = start;
int x0, x1;
int k;
#if 0
printf ("start = %d", start);
running_sum = start;
for (k = 0; k < n_steps; k++)
{
running_sum += steps[k].delta;
printf (" %d:%d", steps[k].x, running_sum >> 16);
}
printf ("\n");
#endif
linebuf = data->buf;
x0 = data->x0;
x1 = data->x1;
if (n_steps > 0)
{
run_x1 = steps[0].x;
if (run_x1 > x0)
memset (linebuf, running_sum >> 16, run_x1 - x0);
for (k = 0; k < n_steps - 1; k++)
{
running_sum += steps[k].delta;
run_x0 = run_x1;
run_x1 = steps[k + 1].x;
if (run_x1 > run_x0)
memset (linebuf + run_x0 - x0, running_sum >> 16, run_x1 - run_x0);
}
running_sum += steps[k].delta;
if (x1 > run_x1)
memset (linebuf + run_x1 - x0, running_sum >> 16, x1 - run_x1);
}
else
{
memset (linebuf, running_sum >> 16, x1 - x0);
}
data->buf += data->rowstride;
}
/**
* art_gray_svp_aa: Render the vector path into the bytemap.
* @svp: The SVP to render.
* @x0: The view window's left coord.
* @y0: The view window's top coord.
* @x1: The view window's right coord.
* @y1: The view window's bottom coord.
* @buf: The buffer where the bytemap is stored.
* @rowstride: the rowstride for @buf.
*
* Each pixel gets a value proportional to the area within the pixel
* overlapping the (filled) SVP. Pixel (x, y) is stored at:
*
* @buf[(y - * @y0) * @rowstride + (x - @x0)]
*
* All pixels @x0 <= x < @x1, @y0 <= y < @y1 are generated. A
* stored value of zero is no coverage, and a value of 255 is full
* coverage. The area within the pixel (x, y) is the region covered
* by [x..x+1] and [y..y+1].
**/
void
art_gray_svp_aa (const ArtSVP *svp,
int x0, int y0, int x1, int y1,
art_u8 *buf, int rowstride)
{
ArtGraySVPData data;
data.buf = buf;
data.rowstride = rowstride;
data.x0 = x0;
data.x1 = x1;
art_svp_render_aa (svp, x0, y0, x1, y1, art_gray_svp_callback, &data);
}

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Render a sorted vector path into a graymap. */
#ifndef __ART_GRAY_SVP_H__
#define __ART_GRAY_SVP_H__
#ifdef LIBART_COMPILATION
#include "art_svp.h"
#else
#include <libart_lgpl/art_svp.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
void
art_gray_svp_aa (const ArtSVP *svp,
int x0, int y0, int x1, int y1,
art_u8 *buf, int rowstride);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_GRAY_SVP_H__ */

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other-licenses/libart_lgpl/art_misc.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Various utility functions RLL finds useful. */
#include "config.h"
#ifdef HAVE_UINSTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#include <stdarg.h>
#include "art_misc.h"
/**
* art_die: Print the error message to stderr and exit with a return code of 1.
* @fmt: The printf-style format for the error message.
*
* Used for dealing with severe errors.
**/
void
art_die (const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
vfprintf (stderr, fmt, ap);
va_end (ap);
exit (1);
}
/**
* art_warn: Print the warning message to stderr.
* @fmt: The printf-style format for the warning message.
*
* Used for generating warnings.
**/
void
art_warn (const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
vfprintf (stderr, fmt, ap);
va_end (ap);
}
/**
* art_dprint: Print the debug message to stderr.
* @fmt: The printf-style format for the debug message.
*
* Used for generating debug output.
**/
void
art_dprint (const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
vfprintf (stderr, fmt, ap);
va_end (ap);
}

96
other-licenses/libart_lgpl/art_misc.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Simple macros to set up storage allocation and basic types for libart
functions. */
#ifndef __ART_MISC_H__
#define __ART_MISC_H__
#include <stdlib.h> /* for malloc, etc. */
/* The art_config.h file is automatically generated by
gen_art_config.c and contains definitions of
ART_SIZEOF_{CHAR,SHORT,INT,LONG} and art_u{8,16,32}. */
#ifdef LIBART_COMPILATION
#include "art_config.h"
#else
#include <libart_lgpl/art_config.h>
#endif
#define art_alloc malloc
#define art_free free
#define art_realloc realloc
/* These aren't, strictly speaking, configuration macros, but they're
damn handy to have around, and may be worth playing with for
debugging. */
#define art_new(type, n) ((type *)art_alloc ((n) * sizeof(type)))
#define art_renew(p, type, n) ((type *)art_realloc (p, (n) * sizeof(type)))
/* This one must be used carefully - in particular, p and max should
be variables. They can also be pstruct->el lvalues. */
#define art_expand(p, type, max) do { if(max) { p = art_renew (p, type, max <<= 1); } else { max = 1; p = art_new(type, 1); } } while (0)
typedef int art_boolean;
#define ART_FALSE 0
#define ART_TRUE 1
/* define pi */
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif /* M_PI */
#ifndef M_SQRT2
#define M_SQRT2 1.41421356237309504880 /* sqrt(2) */
#endif /* M_SQRT2 */
/* Provide macros to feature the GCC function attribute.
*/
#if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4))
#define ART_GNUC_PRINTF( format_idx, arg_idx ) \
__attribute__((format (printf, format_idx, arg_idx)))
#define ART_GNUC_NORETURN \
__attribute__((noreturn))
#else /* !__GNUC__ */
#define ART_GNUC_PRINTF( format_idx, arg_idx )
#define ART_GNUC_NORETURN
#endif /* !__GNUC__ */
#ifdef __cplusplus
extern "C" {
#endif
void ART_GNUC_NORETURN
art_die (const char *fmt, ...) ART_GNUC_PRINTF (1, 2);
void
art_warn (const char *fmt, ...) ART_GNUC_PRINTF (1, 2);
void
art_dprint (const char *fmt, ...) ART_GNUC_PRINTF (1, 2);
#ifdef __cplusplus
}
#endif
#define ART_USE_NEW_INTERSECTOR
#endif /* __ART_MISC_H__ */

39
other-licenses/libart_lgpl/art_pathcode.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_PATHCODE_H__
#define __ART_PATHCODE_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef enum {
ART_MOVETO,
ART_MOVETO_OPEN,
ART_CURVETO,
ART_LINETO,
ART_END
} ArtPathcode;
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_PATHCODE_H__ */

283
other-licenses/libart_lgpl/art_pixbuf.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "art_misc.h"
#include "art_pixbuf.h"
#include <string.h>
/**
* art_pixbuf_new_rgb_dnotify: Create a new RGB #ArtPixBuf with explicit destroy notification.
* @pixels: A buffer containing the actual pixel data.
* @width: The width of the pixbuf.
* @height: The height of the pixbuf.
* @rowstride: The rowstride of the pixbuf.
* @dfunc_data: The private data passed to @dfunc.
* @dfunc: The destroy notification function.
*
* Creates a generic data structure for holding a buffer of RGB
* pixels. It is possible to think of an #ArtPixBuf as a
* virtualization over specific pixel buffer formats.
*
* @dfunc is called with @dfunc_data and @pixels as arguments when the
* #ArtPixBuf is destroyed. Using a destroy notification function
* allows a wide range of memory management disciplines for the pixel
* memory. A NULL value for @dfunc is also allowed and means that no
* special action will be taken on destruction.
*
* Return value: The newly created #ArtPixBuf.
**/
ArtPixBuf *
art_pixbuf_new_rgb_dnotify (art_u8 *pixels, int width, int height, int rowstride,
void *dfunc_data, ArtDestroyNotify dfunc)
{
ArtPixBuf *pixbuf;
pixbuf = art_new (ArtPixBuf, 1);
pixbuf->format = ART_PIX_RGB;
pixbuf->n_channels = 3;
pixbuf->has_alpha = 0;
pixbuf->bits_per_sample = 8;
pixbuf->pixels = (art_u8 *) pixels;
pixbuf->width = width;
pixbuf->height = height;
pixbuf->rowstride = rowstride;
pixbuf->destroy_data = dfunc_data;
pixbuf->destroy = dfunc;
return pixbuf;
}
/**
* art_pixbuf_new_rgba_dnotify: Create a new RGBA #ArtPixBuf with explicit destroy notification.
* @pixels: A buffer containing the actual pixel data.
* @width: The width of the pixbuf.
* @height: The height of the pixbuf.
* @rowstride: The rowstride of the pixbuf.
* @dfunc_data: The private data passed to @dfunc.
* @dfunc: The destroy notification function.
*
* Creates a generic data structure for holding a buffer of RGBA
* pixels. It is possible to think of an #ArtPixBuf as a
* virtualization over specific pixel buffer formats.
*
* @dfunc is called with @dfunc_data and @pixels as arguments when the
* #ArtPixBuf is destroyed. Using a destroy notification function
* allows a wide range of memory management disciplines for the pixel
* memory. A NULL value for @dfunc is also allowed and means that no
* special action will be taken on destruction.
*
* Return value: The newly created #ArtPixBuf.
**/
ArtPixBuf *
art_pixbuf_new_rgba_dnotify (art_u8 *pixels, int width, int height, int rowstride,
void *dfunc_data, ArtDestroyNotify dfunc)
{
ArtPixBuf *pixbuf;
pixbuf = art_new (ArtPixBuf, 1);
pixbuf->format = ART_PIX_RGB;
pixbuf->n_channels = 4;
pixbuf->has_alpha = 1;
pixbuf->bits_per_sample = 8;
pixbuf->pixels = (art_u8 *) pixels;
pixbuf->width = width;
pixbuf->height = height;
pixbuf->rowstride = rowstride;
pixbuf->destroy_data = dfunc_data;
pixbuf->destroy = dfunc;
return pixbuf;
}
/**
* art_pixbuf_new_const_rgb: Create a new RGB #ArtPixBuf with constant pixel data.
* @pixels: A buffer containing the actual pixel data.
* @width: The width of the pixbuf.
* @height: The height of the pixbuf.
* @rowstride: The rowstride of the pixbuf.
*
* Creates a generic data structure for holding a buffer of RGB
* pixels. It is possible to think of an #ArtPixBuf as a
* virtualization over specific pixel buffer formats.
*
* No action is taken when the #ArtPixBuf is destroyed. Thus, this
* function is useful when the pixel data is constant or statically
* allocated.
*
* Return value: The newly created #ArtPixBuf.
**/
ArtPixBuf *
art_pixbuf_new_const_rgb (const art_u8 *pixels, int width, int height, int rowstride)
{
return art_pixbuf_new_rgb_dnotify ((art_u8 *) pixels, width, height, rowstride, NULL, NULL);
}
/**
* art_pixbuf_new_const_rgba: Create a new RGBA #ArtPixBuf with constant pixel data.
* @pixels: A buffer containing the actual pixel data.
* @width: The width of the pixbuf.
* @height: The height of the pixbuf.
* @rowstride: The rowstride of the pixbuf.
*
* Creates a generic data structure for holding a buffer of RGBA
* pixels. It is possible to think of an #ArtPixBuf as a
* virtualization over specific pixel buffer formats.
*
* No action is taken when the #ArtPixBuf is destroyed. Thus, this
* function is suitable when the pixel data is constant or statically
* allocated.
*
* Return value: The newly created #ArtPixBuf.
**/
ArtPixBuf *
art_pixbuf_new_const_rgba (const art_u8 *pixels, int width, int height, int rowstride)
{
return art_pixbuf_new_rgba_dnotify ((art_u8 *) pixels, width, height, rowstride, NULL, NULL);
}
static void
art_pixel_destroy (void *func_data, void *data)
{
art_free (data);
}
/**
* art_pixbuf_new_rgb: Create a new RGB #ArtPixBuf.
* @pixels: A buffer containing the actual pixel data.
* @width: The width of the pixbuf.
* @height: The height of the pixbuf.
* @rowstride: The rowstride of the pixbuf.
*
* Creates a generic data structure for holding a buffer of RGB
* pixels. It is possible to think of an #ArtPixBuf as a
* virtualization over specific pixel buffer formats.
*
* The @pixels buffer is freed with art_free() when the #ArtPixBuf is
* destroyed. Thus, this function is suitable when the pixel data is
* allocated with art_alloc().
*
* Return value: The newly created #ArtPixBuf.
**/
ArtPixBuf *
art_pixbuf_new_rgb (art_u8 *pixels, int width, int height, int rowstride)
{
return art_pixbuf_new_rgb_dnotify (pixels, width, height, rowstride, NULL, art_pixel_destroy);
}
/**
* art_pixbuf_new_rgba: Create a new RGBA #ArtPixBuf.
* @pixels: A buffer containing the actual pixel data.
* @width: The width of the pixbuf.
* @height: The height of the pixbuf.
* @rowstride: The rowstride of the pixbuf.
*
* Creates a generic data structure for holding a buffer of RGBA
* pixels. It is possible to think of an #ArtPixBuf as a
* virtualization over specific pixel buffer formats.
*
* The @pixels buffer is freed with art_free() when the #ArtPixBuf is
* destroyed. Thus, this function is suitable when the pixel data is
* allocated with art_alloc().
*
* Return value: The newly created #ArtPixBuf.
**/
ArtPixBuf *
art_pixbuf_new_rgba (art_u8 *pixels, int width, int height, int rowstride)
{
return art_pixbuf_new_rgba_dnotify (pixels, width, height, rowstride, NULL, art_pixel_destroy);
}
/**
* art_pixbuf_free: Destroy an #ArtPixBuf.
* @pixbuf: The #ArtPixBuf to be destroyed.
*
* Destroys the #ArtPixBuf, calling the destroy notification function
* (if non-NULL) so that the memory for the pixel buffer can be
* properly reclaimed.
**/
void
art_pixbuf_free (ArtPixBuf *pixbuf)
{
ArtDestroyNotify destroy = pixbuf->destroy;
void *destroy_data = pixbuf->destroy_data;
art_u8 *pixels = pixbuf->pixels;
pixbuf->pixels = NULL;
pixbuf->destroy = NULL;
pixbuf->destroy_data = NULL;
if (destroy)
destroy (destroy_data, pixels);
art_free (pixbuf);
}
/**
* art_pixbuf_free_shallow:
* @pixbuf: The #ArtPixBuf to be destroyed.
*
* Destroys the #ArtPixBuf without calling the destroy notification function.
*
* This function is deprecated. Use the _dnotify variants for
* allocation instead.
**/
void
art_pixbuf_free_shallow (ArtPixBuf *pixbuf)
{
art_free (pixbuf);
}
/**
* art_pixbuf_duplicate: Duplicate a pixbuf.
* @pixbuf: The #ArtPixBuf to duplicate.
*
* Duplicates a pixbuf, including duplicating the buffer.
*
* Return value: The duplicated pixbuf.
**/
ArtPixBuf *
art_pixbuf_duplicate (const ArtPixBuf *pixbuf)
{
ArtPixBuf *result;
int size;
result = art_new (ArtPixBuf, 1);
result->format = pixbuf->format;
result->n_channels = pixbuf->n_channels;
result->has_alpha = pixbuf->has_alpha;
result->bits_per_sample = pixbuf->bits_per_sample;
size = (pixbuf->height - 1) * pixbuf->rowstride +
pixbuf->width * ((pixbuf->n_channels * pixbuf->bits_per_sample + 7) >> 3);
result->pixels = art_alloc (size);
memcpy (result->pixels, pixbuf->pixels, size);
result->width = pixbuf->width;
result->height = pixbuf->height;
result->rowstride = pixbuf->rowstride;
result->destroy_data = NULL;
result->destroy = art_pixel_destroy;
return result;
}

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_PIXBUF_H__
#define __ART_PIXBUF_H__
/* A generic data structure for holding a buffer of pixels. One way
to think about this module is as a virtualization over specific
pixel buffer formats. */
#ifdef __cplusplus
extern "C" {
#endif
typedef void (*ArtDestroyNotify) (void *func_data, void *data);
typedef struct _ArtPixBuf ArtPixBuf;
typedef enum {
ART_PIX_RGB
/* gray, cmyk, lab, ... ? */
} ArtPixFormat;
/* The pixel buffer consists of width * height pixels, each of which
has n_channels samples. It is stored in simple packed format. */
struct _ArtPixBuf {
/*< public >*/
ArtPixFormat format;
int n_channels;
int has_alpha;
int bits_per_sample;
art_u8 *pixels;
int width;
int height;
int rowstride;
void *destroy_data;
ArtDestroyNotify destroy;
};
/* allocate an ArtPixBuf from art_alloc()ed pixels (automated destruction) */
ArtPixBuf *
art_pixbuf_new_rgb (art_u8 *pixels, int width, int height, int rowstride);
ArtPixBuf *
art_pixbuf_new_rgba (art_u8 *pixels, int width, int height, int rowstride);
/* allocate an ArtPixBuf from constant pixels (no destruction) */
ArtPixBuf *
art_pixbuf_new_const_rgb (const art_u8 *pixels, int width, int height, int rowstride);
ArtPixBuf *
art_pixbuf_new_const_rgba (const art_u8 *pixels, int width, int height, int rowstride);
/* allocate an ArtPixBuf and notify creator upon destruction */
ArtPixBuf *
art_pixbuf_new_rgb_dnotify (art_u8 *pixels, int width, int height, int rowstride,
void *dfunc_data, ArtDestroyNotify dfunc);
ArtPixBuf *
art_pixbuf_new_rgba_dnotify (art_u8 *pixels, int width, int height, int rowstride,
void *dfunc_data, ArtDestroyNotify dfunc);
/* free an ArtPixBuf with destroy notification */
void
art_pixbuf_free (ArtPixBuf *pixbuf);
/* deprecated function, use the _dnotify variants for allocation instead */
void
art_pixbuf_free_shallow (ArtPixBuf *pixbuf);
ArtPixBuf *
art_pixbuf_duplicate (const ArtPixBuf *pixbuf);
#ifdef __cplusplus
}
#endif
#endif

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other-licenses/libart_lgpl/art_point.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_POINT_H__
#define __ART_POINT_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef struct _ArtPoint ArtPoint;
struct _ArtPoint {
/*< public >*/
double x, y;
};
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_POINT_H__ */

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other-licenses/libart_lgpl/art_rect.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <math.h>
#include "art_misc.h"
#include "art_rect.h"
#ifndef MAX
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
#endif /* MAX */
#ifndef MIN
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#endif /* MIN */
/* rectangle primitives stolen from gzilla */
/**
* art_irect_copy: Make a copy of an integer rectangle.
* @dest: Where the copy is stored.
* @src: The source rectangle.
*
* Copies the rectangle.
**/
void
art_irect_copy (ArtIRect *dest, const ArtIRect *src) {
dest->x0 = src->x0;
dest->y0 = src->y0;
dest->x1 = src->x1;
dest->y1 = src->y1;
}
/**
* art_irect_union: Find union of two integer rectangles.
* @dest: Where the result is stored.
* @src1: A source rectangle.
* @src2: Another source rectangle.
*
* Finds the smallest rectangle that includes @src1 and @src2.
**/
void
art_irect_union (ArtIRect *dest, const ArtIRect *src1, const ArtIRect *src2) {
if (art_irect_empty (src1)) {
art_irect_copy (dest, src2);
} else if (art_irect_empty (src2)) {
art_irect_copy (dest, src1);
} else {
dest->x0 = MIN (src1->x0, src2->x0);
dest->y0 = MIN (src1->y0, src2->y0);
dest->x1 = MAX (src1->x1, src2->x1);
dest->y1 = MAX (src1->y1, src2->y1);
}
}
/**
* art_irect_intersection: Find intersection of two integer rectangles.
* @dest: Where the result is stored.
* @src1: A source rectangle.
* @src2: Another source rectangle.
*
* Finds the intersection of @src1 and @src2.
**/
void
art_irect_intersect (ArtIRect *dest, const ArtIRect *src1, const ArtIRect *src2) {
dest->x0 = MAX (src1->x0, src2->x0);
dest->y0 = MAX (src1->y0, src2->y0);
dest->x1 = MIN (src1->x1, src2->x1);
dest->y1 = MIN (src1->y1, src2->y1);
}
/**
* art_irect_empty: Determine whether integer rectangle is empty.
* @src: The source rectangle.
*
* Return value: TRUE if @src is an empty rectangle, FALSE otherwise.
**/
int
art_irect_empty (const ArtIRect *src) {
return (src->x1 <= src->x0 || src->y1 <= src->y0);
}
#if 0
gboolean irect_point_inside (ArtIRect *rect, GzwPoint *point) {
return (point->x >= rect->x0 && point->y >= rect->y0 &&
point->x < rect->x1 && point->y < rect->y1);
}
#endif
/**
* art_drect_copy: Make a copy of a rectangle.
* @dest: Where the copy is stored.
* @src: The source rectangle.
*
* Copies the rectangle.
**/
void
art_drect_copy (ArtDRect *dest, const ArtDRect *src) {
dest->x0 = src->x0;
dest->y0 = src->y0;
dest->x1 = src->x1;
dest->y1 = src->y1;
}
/**
* art_drect_union: Find union of two rectangles.
* @dest: Where the result is stored.
* @src1: A source rectangle.
* @src2: Another source rectangle.
*
* Finds the smallest rectangle that includes @src1 and @src2.
**/
void
art_drect_union (ArtDRect *dest, const ArtDRect *src1, const ArtDRect *src2) {
if (art_drect_empty (src1)) {
art_drect_copy (dest, src2);
} else if (art_drect_empty (src2)) {
art_drect_copy (dest, src1);
} else {
dest->x0 = MIN (src1->x0, src2->x0);
dest->y0 = MIN (src1->y0, src2->y0);
dest->x1 = MAX (src1->x1, src2->x1);
dest->y1 = MAX (src1->y1, src2->y1);
}
}
/**
* art_drect_intersection: Find intersection of two rectangles.
* @dest: Where the result is stored.
* @src1: A source rectangle.
* @src2: Another source rectangle.
*
* Finds the intersection of @src1 and @src2.
**/
void
art_drect_intersect (ArtDRect *dest, const ArtDRect *src1, const ArtDRect *src2) {
dest->x0 = MAX (src1->x0, src2->x0);
dest->y0 = MAX (src1->y0, src2->y0);
dest->x1 = MIN (src1->x1, src2->x1);
dest->y1 = MIN (src1->y1, src2->y1);
}
/**
* art_irect_empty: Determine whether rectangle is empty.
* @src: The source rectangle.
*
* Return value: TRUE if @src is an empty rectangle, FALSE otherwise.
**/
int
art_drect_empty (const ArtDRect *src) {
return (src->x1 <= src->x0 || src->y1 <= src->y0);
}
/**
* art_drect_affine_transform: Affine transform rectangle.
* @dst: Where to store the result.
* @src: The source rectangle.
* @matrix: The affine transformation.
*
* Find the smallest rectangle enclosing the affine transformed @src.
* The result is exactly the affine transformation of @src when
* @matrix specifies a rectilinear affine transformation, otherwise it
* is a conservative approximation.
**/
void
art_drect_affine_transform (ArtDRect *dst, const ArtDRect *src, const double matrix[6])
{
double x00, y00, x10, y10;
double x01, y01, x11, y11;
x00 = src->x0 * matrix[0] + src->y0 * matrix[2] + matrix[4];
y00 = src->x0 * matrix[1] + src->y0 * matrix[3] + matrix[5];
x10 = src->x1 * matrix[0] + src->y0 * matrix[2] + matrix[4];
y10 = src->x1 * matrix[1] + src->y0 * matrix[3] + matrix[5];
x01 = src->x0 * matrix[0] + src->y1 * matrix[2] + matrix[4];
y01 = src->x0 * matrix[1] + src->y1 * matrix[3] + matrix[5];
x11 = src->x1 * matrix[0] + src->y1 * matrix[2] + matrix[4];
y11 = src->x1 * matrix[1] + src->y1 * matrix[3] + matrix[5];
dst->x0 = MIN (MIN (x00, x10), MIN (x01, x11));
dst->y0 = MIN (MIN (y00, y10), MIN (y01, y11));
dst->x1 = MAX (MAX (x00, x10), MAX (x01, x11));
dst->y1 = MAX (MAX (y00, y10), MAX (y01, y11));
}
/**
* art_drect_to_irect: Convert rectangle to integer rectangle.
* @dst: Where to store resulting integer rectangle.
* @src: The source rectangle.
*
* Find the smallest integer rectangle that encloses @src.
**/
void
art_drect_to_irect (ArtIRect *dst, ArtDRect *src)
{
dst->x0 = floor (src->x0);
dst->y0 = floor (src->y0);
dst->x1 = ceil (src->x1);
dst->y1 = ceil (src->y1);
}

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other-licenses/libart_lgpl/art_rect.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_RECT_H__
#define __ART_RECT_H__
#ifdef __cplusplus
extern "C" {
#endif
typedef struct _ArtDRect ArtDRect;
typedef struct _ArtIRect ArtIRect;
struct _ArtDRect {
/*< public >*/
double x0, y0, x1, y1;
};
struct _ArtIRect {
/*< public >*/
int x0, y0, x1, y1;
};
/* Make a copy of the rectangle. */
void art_irect_copy (ArtIRect *dest, const ArtIRect *src);
/* Find the smallest rectangle that includes both source rectangles. */
void art_irect_union (ArtIRect *dest,
const ArtIRect *src1, const ArtIRect *src2);
/* Return the intersection of the two rectangles */
void art_irect_intersect (ArtIRect *dest,
const ArtIRect *src1, const ArtIRect *src2);
/* Return true if the rectangle is empty. */
int art_irect_empty (const ArtIRect *src);
/* Make a copy of the rectangle. */
void art_drect_copy (ArtDRect *dest, const ArtDRect *src);
/* Find the smallest rectangle that includes both source rectangles. */
void art_drect_union (ArtDRect *dest,
const ArtDRect *src1, const ArtDRect *src2);
/* Return the intersection of the two rectangles */
void art_drect_intersect (ArtDRect *dest,
const ArtDRect *src1, const ArtDRect *src2);
/* Return true if the rectangle is empty. */
int art_drect_empty (const ArtDRect *src);
void
art_drect_affine_transform (ArtDRect *dst, const ArtDRect *src,
const double matrix[6]);
void art_drect_to_irect (ArtIRect *dst, ArtDRect *src);
#ifdef __cplusplus
}
#endif
#endif

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other-licenses/libart_lgpl/art_rect_svp.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "art_misc.h"
#include "art_svp.h"
#include "art_rect.h"
#include "art_rect_svp.h"
/**
* art_drect_svp: Find the bounding box of a sorted vector path.
* @bbox: Where to store the bounding box.
* @svp: The SVP.
*
* Finds the bounding box of the SVP.
**/
void
art_drect_svp (ArtDRect *bbox, const ArtSVP *svp)
{
int i;
bbox->x0 = 0;
bbox->y0 = 0;
bbox->x1 = 0;
bbox->y1 = 0;
for (i = 0; i < svp->n_segs; i++)
{
art_drect_union (bbox, bbox, &svp->segs[i].bbox);
}
}
/**
* art_drect_svp_union: Compute the bounding box of the svp and union it in to the existing bounding box.
* @bbox: Initial boundin box and where to store the bounding box.
* @svp: The SVP.
*
* Finds the bounding box of the SVP, computing its union with an
* existing bbox.
**/
void
art_drect_svp_union (ArtDRect *bbox, const ArtSVP *svp)
{
int i;
for (i = 0; i < svp->n_segs; i++)
{
art_drect_union (bbox, bbox, &svp->segs[i].bbox);
}
}

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other-licenses/libart_lgpl/art_rect_svp.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_RECT_SVP_H__
#define __ART_RECT_SVP_H__
/* Find the bounding box of a sorted vector path. */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
void
art_drect_svp (ArtDRect *bbox, const ArtSVP *svp);
/* Compute the bounding box of the svp and union it in to the
existing bounding box. */
void
art_drect_svp_union (ArtDRect *bbox, const ArtSVP *svp);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_RECT_SVP_H__ */

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other-licenses/libart_lgpl/art_rect_uta.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "art_misc.h"
#include "art_uta.h"
#include "art_rect.h"
#include "art_rect_uta.h"
/* Functions to decompose a microtile array into a list of rectangles. */
/**
* art_rect_list_from_uta: Decompose uta into list of rectangles.
* @uta: The source uta.
* @max_width: The maximum width of the resulting rectangles.
* @max_height: The maximum height of the resulting rectangles.
* @p_nrects: Where to store the number of returned rectangles.
*
* Allocates a new list of rectangles, sets *@p_nrects to the number
* in the list. This list should be freed with art_free().
*
* Each rectangle bounded in size by (@max_width, @max_height).
* However, these bounds must be at least the size of one tile.
*
* This routine provides a precise implementation, i.e. the rectangles
* cover exactly the same area as the uta. It is thus appropriate in
* cases where the overhead per rectangle is small compared with the
* cost of filling in extra pixels.
*
* Return value: An array containing the resulting rectangles.
**/
ArtIRect *
art_rect_list_from_uta (ArtUta *uta, int max_width, int max_height,
int *p_nrects)
{
ArtIRect *rects;
int n_rects, n_rects_max;
int x, y;
int width, height;
int ix;
int left_ix;
ArtUtaBbox *utiles;
ArtUtaBbox bb;
int x0, y0, x1, y1;
int *glom;
int glom_rect;
n_rects = 0;
n_rects_max = 1;
rects = art_new (ArtIRect, n_rects_max);
width = uta->width;
height = uta->height;
utiles = uta->utiles;
glom = art_new (int, width * height);
for (ix = 0; ix < width * height; ix++)
glom[ix] = -1;
ix = 0;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
{
bb = utiles[ix];
if (bb)
{
x0 = ((uta->x0 + x) << ART_UTILE_SHIFT) + ART_UTA_BBOX_X0(bb);
y0 = ((uta->y0 + y) << ART_UTILE_SHIFT) + ART_UTA_BBOX_Y0(bb);
y1 = ((uta->y0 + y) << ART_UTILE_SHIFT) + ART_UTA_BBOX_Y1(bb);
left_ix = ix;
/* now try to extend to the right */
while (x != width - 1 &&
ART_UTA_BBOX_X1(bb) == ART_UTILE_SIZE &&
(((bb & 0xffffff) ^ utiles[ix + 1]) & 0xffff00ff) == 0 &&
(((uta->x0 + x + 1) << ART_UTILE_SHIFT) +
ART_UTA_BBOX_X1(utiles[ix + 1]) -
x0) <= max_width)
{
bb = utiles[ix + 1];
ix++;
x++;
}
x1 = ((uta->x0 + x) << ART_UTILE_SHIFT) + ART_UTA_BBOX_X1(bb);
/* if rectangle nonempty */
if ((x1 ^ x0) | (y1 ^ y0))
{
/* try to glom onto an existing rectangle */
glom_rect = glom[left_ix];
if (glom_rect != -1 &&
x0 == rects[glom_rect].x0 &&
x1 == rects[glom_rect].x1 &&
y0 == rects[glom_rect].y1 &&
y1 - rects[glom_rect].y0 <= max_height)
{
rects[glom_rect].y1 = y1;
}
else
{
if (n_rects == n_rects_max)
art_expand (rects, ArtIRect, n_rects_max);
rects[n_rects].x0 = x0;
rects[n_rects].y0 = y0;
rects[n_rects].x1 = x1;
rects[n_rects].y1 = y1;
glom_rect = n_rects;
n_rects++;
}
if (y != height - 1)
glom[left_ix + width] = glom_rect;
}
}
ix++;
}
art_free (glom);
*p_nrects = n_rects;
return rects;
}

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_RECT_UTA_H__
#define __ART_RECT_UTA_H__
#ifdef LIBART_COMPILATION
#include "art_uta.h"
#else
#include <libart_lgpl/art_uta.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
ArtIRect *
art_rect_list_from_uta (ArtUta *uta, int max_width, int max_height,
int *p_nrects);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_RECT_UTA_H__ */

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/*
* art_render.h: Modular rendering architecture.
*
* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_RENDER_H__
#define __ART_RENDER_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* Render object */
#ifndef ART_MAX_DEPTH
#define ART_MAX_DEPTH 16
#endif
#if ART_MAX_DEPTH == 16
typedef art_u16 ArtPixMaxDepth;
#define ART_PIX_MAX_FROM_8(x) ((x) | ((x) << 8))
#define ART_PIX_8_FROM_MAX(x) (((x) + 0x80 - (((x) + 0x80) >> 8)) >> 8)
#else
#if ART_MAX_DEPTH == 8
typedef art_u8 ArtPixMaxDepth;
#define ART_PIX_MAX_FROM_8(x) (x)
#define ART_PIX_8_FROM_MAX(x) (x)
#else
#error ART_MAX_DEPTH must be either 8 or 16
#endif
#endif
#define ART_MAX_CHAN 16
typedef struct _ArtRender ArtRender;
typedef struct _ArtRenderCallback ArtRenderCallback;
typedef struct _ArtRenderMaskRun ArtRenderMaskRun;
typedef struct _ArtImageSource ArtImageSource;
typedef struct _ArtMaskSource ArtMaskSource;
typedef enum {
ART_ALPHA_NONE = 0,
ART_ALPHA_SEPARATE = 1,
ART_ALPHA_PREMUL = 2
} ArtAlphaType;
typedef enum {
ART_COMPOSITE_NORMAL,
ART_COMPOSITE_MULTIPLY,
/* todo: more */
ART_COMPOSITE_CUSTOM
} ArtCompositingMode;
typedef enum {
ART_IMAGE_SOURCE_CAN_CLEAR = 1,
ART_IMAGE_SOURCE_CAN_COMPOSITE = 2
} ArtImageSourceFlags;
struct _ArtRenderMaskRun {
int x;
int alpha;
};
struct _ArtRenderCallback {
void (*render) (ArtRenderCallback *self, ArtRender *render,
art_u8 *dest, int y);
void (*done) (ArtRenderCallback *self, ArtRender *render);
};
struct _ArtImageSource {
ArtRenderCallback super;
void (*negotiate) (ArtImageSource *self, ArtRender *render,
ArtImageSourceFlags *p_flags,
int *p_buf_depth, ArtAlphaType *p_alpha_type);
};
struct _ArtMaskSource {
ArtRenderCallback super;
int (*can_drive) (ArtMaskSource *self, ArtRender *render);
/* For each mask source, ::prepare() is invoked if it is not
a driver, or ::invoke_driver() if it is. */
void (*invoke_driver) (ArtMaskSource *self, ArtRender *render);
void (*prepare) (ArtMaskSource *self, ArtRender *render, art_boolean first);
};
struct _ArtRender {
/* parameters of destination image */
int x0, y0;
int x1, y1;
art_u8 *pixels;
int rowstride;
int n_chan;
int depth;
ArtAlphaType alpha_type;
art_boolean clear;
ArtPixMaxDepth clear_color[ART_MAX_CHAN + 1];
art_u32 opacity; /* [0..0x10000] */
ArtCompositingMode compositing_mode;
ArtAlphaGamma *alphagamma;
art_u8 *alpha_buf;
/* parameters of intermediate buffer */
int buf_depth;
ArtAlphaType buf_alpha;
art_u8 *image_buf;
/* driving alpha scanline data */
/* A "run" is a contiguous sequence of x values with the same alpha value. */
int n_run;
ArtRenderMaskRun *run;
/* A "span" is a contiguous sequence of x values with non-zero alpha. */
int n_span;
int *span_x;
art_boolean need_span;
};
ArtRender *
art_render_new (int x0, int y0, int x1, int y1,
art_u8 *pixels, int rowstride,
int n_chan, int depth, ArtAlphaType alpha_type,
ArtAlphaGamma *alphagamma);
void
art_render_invoke (ArtRender *render);
void
art_render_clear (ArtRender *render, const ArtPixMaxDepth *clear_color);
void
art_render_clear_rgb (ArtRender *render, art_u32 clear_rgb);
void
art_render_mask_solid (ArtRender *render, int opacity);
void
art_render_image_solid (ArtRender *render, ArtPixMaxDepth *color);
/* The next two functions are for custom mask sources only. */
void
art_render_add_mask_source (ArtRender *render, ArtMaskSource *mask_source);
void
art_render_invoke_callbacks (ArtRender *render, art_u8 *dest, int y);
/* The following function is for custom image sources only. */
void
art_render_add_image_source (ArtRender *render, ArtImageSource *image_source);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_RENDER_H__ */

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/*
* art_render_gradient.c: Gradient image source for modular rendering.
*
* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors: Raph Levien <raph@acm.org>
* Alexander Larsson <alla@lysator.liu.se>
*/
#include <math.h>
#include "art_misc.h"
#include "art_alphagamma.h"
#include "art_filterlevel.h"
#include "art_render.h"
#include "art_render_gradient.h"
typedef struct _ArtImageSourceGradLin ArtImageSourceGradLin;
typedef struct _ArtImageSourceGradRad ArtImageSourceGradRad;
struct _ArtImageSourceGradLin {
ArtImageSource super;
const ArtGradientLinear *gradient;
};
struct _ArtImageSourceGradRad {
ArtImageSource super;
const ArtGradientRadial *gradient;
double a;
};
#define EPSILON 1e-6
/**
* art_render_gradient_setpix: Set a gradient pixel.
* @render: The render object.
* @dst: Pointer to destination (where to store pixel).
* @n_stops: Number of stops in @stops.
* @stops: The stops for the gradient.
* @offset: The offset.
*
* @n_stops must be > 0.
*
* Sets a gradient pixel, storing it at @dst.
**/
static void
art_render_gradient_setpix (ArtRender *render,
art_u8 *dst,
int n_stops, ArtGradientStop *stops,
double offset)
{
int ix;
int j;
double off0, off1;
int n_ch = render->n_chan + 1;
for (ix = 0; ix < n_stops; ix++)
if (stops[ix].offset > offset)
break;
/* stops[ix - 1].offset < offset < stops[ix].offset */
if (ix > 0 && ix < n_stops)
{
off0 = stops[ix - 1].offset;
off1 = stops[ix].offset;
if (fabs (off1 - off0) > EPSILON)
{
double interp;
interp = (offset - off0) / (off1 - off0);
for (j = 0; j < n_ch; j++)
{
int z0, z1;
int z;
z0 = stops[ix - 1].color[j];
z1 = stops[ix].color[j];
z = floor (z0 + (z1 - z0) * interp + 0.5);
if (render->buf_depth == 8)
dst[j] = ART_PIX_8_FROM_MAX (z);
else /* (render->buf_depth == 16) */
((art_u16 *)dst)[j] = z;
}
return;
}
}
else if (ix == n_stops)
ix--;
for (j = 0; j < n_ch; j++)
{
int z;
z = stops[ix].color[j];
if (render->buf_depth == 8)
dst[j] = ART_PIX_8_FROM_MAX (z);
else /* (render->buf_depth == 16) */
((art_u16 *)dst)[j] = z;
}
}
static void
art_render_gradient_linear_done (ArtRenderCallback *self, ArtRender *render)
{
art_free (self);
}
static void
art_render_gradient_linear_render (ArtRenderCallback *self, ArtRender *render,
art_u8 *dest, int y)
{
ArtImageSourceGradLin *z = (ArtImageSourceGradLin *)self;
const ArtGradientLinear *gradient = z->gradient;
int pixstride = (render->n_chan + 1) * (render->depth >> 3);
int x;
int width = render->x1 - render->x0;
double offset, d_offset;
double actual_offset;
int n_stops = gradient->n_stops;
ArtGradientStop *stops = gradient->stops;
art_u8 *bufp = render->image_buf;
ArtGradientSpread spread = gradient->spread;
offset = render->x0 * gradient->a + y * gradient->b + gradient->c;
d_offset = gradient->a;
for (x = 0; x < width; x++)
{
if (spread == ART_GRADIENT_PAD)
actual_offset = offset;
else if (spread == ART_GRADIENT_REPEAT)
actual_offset = offset - floor (offset);
else /* (spread == ART_GRADIENT_REFLECT) */
{
double tmp;
tmp = offset - 2 * floor (0.5 * offset);
actual_offset = tmp > 1 ? 2 - tmp : tmp;
}
art_render_gradient_setpix (render, bufp, n_stops, stops, actual_offset);
offset += d_offset;
bufp += pixstride;
}
}
static void
art_render_gradient_linear_negotiate (ArtImageSource *self, ArtRender *render,
ArtImageSourceFlags *p_flags,
int *p_buf_depth, ArtAlphaType *p_alpha)
{
self->super.render = art_render_gradient_linear_render;
*p_flags = 0;
*p_buf_depth = render->depth;
*p_alpha = ART_ALPHA_PREMUL;
}
/**
* art_render_gradient_linear: Add a linear gradient image source.
* @render: The render object.
* @gradient: The linear gradient.
*
* Adds the linear gradient @gradient as the image source for rendering
* in the render object @render.
**/
void
art_render_gradient_linear (ArtRender *render,
const ArtGradientLinear *gradient,
ArtFilterLevel level)
{
ArtImageSourceGradLin *image_source = art_new (ArtImageSourceGradLin, 1);
image_source->super.super.render = NULL;
image_source->super.super.done = art_render_gradient_linear_done;
image_source->super.negotiate = art_render_gradient_linear_negotiate;
image_source->gradient = gradient;
art_render_add_image_source (render, &image_source->super);
}
static void
art_render_gradient_radial_done (ArtRenderCallback *self, ArtRender *render)
{
art_free (self);
}
static void
art_render_gradient_radial_render (ArtRenderCallback *self, ArtRender *render,
art_u8 *dest, int y)
{
ArtImageSourceGradRad *z = (ArtImageSourceGradRad *)self;
const ArtGradientRadial *gradient = z->gradient;
int pixstride = (render->n_chan + 1) * (render->depth >> 3);
int x;
int x0 = render->x0;
int width = render->x1 - x0;
int n_stops = gradient->n_stops;
ArtGradientStop *stops = gradient->stops;
art_u8 *bufp = render->image_buf;
double fx = gradient->fx;
double fy = gradient->fy;
double dx, dy;
double *affine = gradient->affine;
double aff0 = affine[0];
double aff1 = affine[1];
const double a = z->a;
const double arecip = 1.0 / a;
double b, db;
double c, dc, ddc;
double b_a, db_a;
double rad, drad, ddrad;
dx = x0 * aff0 + y * affine[2] + affine[4] - fx;
dy = x0 * aff1 + y * affine[3] + affine[5] - fy;
b = dx * fx + dy * fy;
db = aff0 * fx + aff1 * fy;
c = dx * dx + dy * dy;
dc = 2 * aff0 * dx + aff0 * aff0 + 2 * aff1 * dy + aff1 * aff1;
ddc = 2 * aff0 * aff0 + 2 * aff1 * aff1;
b_a = b * arecip;
db_a = db * arecip;
rad = b_a * b_a + c * arecip;
drad = 2 * b_a * db_a + db_a * db_a + dc * arecip;
ddrad = 2 * db_a * db_a + ddc * arecip;
for (x = 0; x < width; x++)
{
double z;
if (rad > 0)
z = b_a + sqrt (rad);
else
z = b_a;
art_render_gradient_setpix (render, bufp, n_stops, stops, z);
bufp += pixstride;
b_a += db_a;
rad += drad;
drad += ddrad;
}
}
static void
art_render_gradient_radial_negotiate (ArtImageSource *self, ArtRender *render,
ArtImageSourceFlags *p_flags,
int *p_buf_depth, ArtAlphaType *p_alpha)
{
self->super.render = art_render_gradient_radial_render;
*p_flags = 0;
*p_buf_depth = render->depth;
*p_alpha = ART_ALPHA_PREMUL;
}
/**
* art_render_gradient_radial: Add a radial gradient image source.
* @render: The render object.
* @gradient: The radial gradient.
*
* Adds the radial gradient @gradient as the image source for rendering
* in the render object @render.
**/
void
art_render_gradient_radial (ArtRender *render,
const ArtGradientRadial *gradient,
ArtFilterLevel level)
{
ArtImageSourceGradRad *image_source = art_new (ArtImageSourceGradRad, 1);
double fx = gradient->fx;
double fy = gradient->fy;
image_source->super.super.render = NULL;
image_source->super.super.done = art_render_gradient_radial_done;
image_source->super.negotiate = art_render_gradient_radial_negotiate;
image_source->gradient = gradient;
/* todo: sanitycheck fx, fy? */
image_source->a = 1 - fx * fx - fy * fy;
art_render_add_image_source (render, &image_source->super);
}

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/*
* art_render_gradient.h: Gradient image source for modular rendering.
*
* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors: Raph Levien <raph@acm.org>
* Alexander Larsson <alla@lysator.liu.se>
*/
#ifndef __ART_RENDER_GRADIENT_H__
#define __ART_RENDER_GRADIENT_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef struct _ArtGradientLinear ArtGradientLinear;
typedef struct _ArtGradientRadial ArtGradientRadial;
typedef struct _ArtGradientStop ArtGradientStop;
typedef enum {
ART_GRADIENT_PAD,
ART_GRADIENT_REFLECT,
ART_GRADIENT_REPEAT
} ArtGradientSpread;
struct _ArtGradientLinear {
double a;
double b;
double c;
ArtGradientSpread spread;
int n_stops;
ArtGradientStop *stops;
};
struct _ArtGradientRadial {
double affine[6]; /* transforms user coordinates to unit circle */
double fx, fy; /* focal point in unit circle coords */
int n_stops;
ArtGradientStop *stops;
};
struct _ArtGradientStop {
double offset;
ArtPixMaxDepth color[ART_MAX_CHAN + 1];
};
void
art_render_gradient_linear (ArtRender *render,
const ArtGradientLinear *gradient,
ArtFilterLevel level);
void
art_render_gradient_radial (ArtRender *render,
const ArtGradientRadial *gradient,
ArtFilterLevel level);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_RENDER_GRADIENT_H__ */

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/*
* art_render_gradient.c: SVP mask source for modular rendering.
*
* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors: Raph Levien <raph@acm.org>
*/
#include "art_misc.h"
#include "art_alphagamma.h"
#include "art_svp.h"
#include "art_svp_render_aa.h"
#include "art_render.h"
#include "art_render_svp.h"
typedef struct _ArtMaskSourceSVP ArtMaskSourceSVP;
struct _ArtMaskSourceSVP {
ArtMaskSource super;
ArtRender *render;
const ArtSVP *svp;
art_u8 *dest_ptr;
};
static void
art_render_svp_done (ArtRenderCallback *self, ArtRender *render)
{
art_free (self);
}
static int
art_render_svp_can_drive (ArtMaskSource *self, ArtRender *render)
{
return 10;
}
/* The basic art_render_svp_callback function is repeated four times,
for all combinations of non-unit opacity and generating spans. In
general, I'd consider this bad style, but in this case I plead
a measurable performance improvement. */
static void
art_render_svp_callback (void *callback_data, int y,
int start, ArtSVPRenderAAStep *steps, int n_steps)
{
ArtMaskSourceSVP *z = (ArtMaskSourceSVP *)callback_data;
ArtRender *render = z->render;
int n_run = 0;
int i;
int running_sum = start;
int x0 = render->x0;
int x1 = render->x1;
int run_x0, run_x1;
ArtRenderMaskRun *run = render->run;
if (n_steps > 0)
{
run_x1 = steps[0].x;
if (run_x1 > x0 && running_sum > 0x80ff)
{
run[0].x = x0;
run[0].alpha = running_sum;
n_run++;
}
for (i = 0; i < n_steps - 1; i++)
{
running_sum += steps[i].delta;
run_x0 = run_x1;
run_x1 = steps[i + 1].x;
if (run_x1 > run_x0)
{
run[n_run].x = run_x0;
run[n_run].alpha = running_sum;
n_run++;
}
}
if (x1 > run_x1)
{
running_sum += steps[n_steps - 1].delta;
run[n_run].x = run_x1;
run[n_run].alpha = running_sum;
n_run++;
}
if (running_sum > 0x80ff)
{
run[n_run].x = x1;
run[n_run].alpha = 0x8000;
n_run++;
}
}
render->n_run = n_run;
art_render_invoke_callbacks (render, z->dest_ptr, y);
z->dest_ptr += render->rowstride;
}
static void
art_render_svp_callback_span (void *callback_data, int y,
int start, ArtSVPRenderAAStep *steps, int n_steps)
{
ArtMaskSourceSVP *z = (ArtMaskSourceSVP *)callback_data;
ArtRender *render = z->render;
int n_run = 0;
int n_span = 0;
int i;
int running_sum = start;
int x0 = render->x0;
int x1 = render->x1;
int run_x0, run_x1;
ArtRenderMaskRun *run = render->run;
int *span_x = render->span_x;
if (n_steps > 0)
{
run_x1 = steps[0].x;
if (run_x1 > x0 && running_sum > 0x80ff)
{
run[0].x = x0;
run[0].alpha = running_sum;
n_run++;
span_x[0] = x0;
n_span++;
}
for (i = 0; i < n_steps - 1; i++)
{
running_sum += steps[i].delta;
run_x0 = run_x1;
run_x1 = steps[i + 1].x;
if (run_x1 > run_x0)
{
run[n_run].x = run_x0;
run[n_run].alpha = running_sum;
n_run++;
if ((n_span & 1) != (running_sum > 0x80ff))
span_x[n_span++] = run_x0;
}
}
if (x1 > run_x1)
{
running_sum += steps[n_steps - 1].delta;
run[n_run].x = run_x1;
run[n_run].alpha = running_sum;
n_run++;
if ((n_span & 1) != (running_sum > 0x80ff))
span_x[n_span++] = run_x1;
}
if (running_sum > 0x80ff)
{
run[n_run].x = x1;
run[n_run].alpha = 0x8000;
n_run++;
span_x[n_span++] = x1;
}
}
render->n_run = n_run;
render->n_span = n_span;
art_render_invoke_callbacks (render, z->dest_ptr, y);
z->dest_ptr += render->rowstride;
}
static void
art_render_svp_callback_opacity (void *callback_data, int y,
int start, ArtSVPRenderAAStep *steps, int n_steps)
{
ArtMaskSourceSVP *z = (ArtMaskSourceSVP *)callback_data;
ArtRender *render = z->render;
int n_run = 0;
int i;
art_u32 running_sum;
int x0 = render->x0;
int x1 = render->x1;
int run_x0, run_x1;
ArtRenderMaskRun *run = render->run;
art_u32 opacity = render->opacity;
art_u32 alpha;
running_sum = start - 0x7f80;
if (n_steps > 0)
{
run_x1 = steps[0].x;
alpha = ((running_sum >> 8) * opacity + 0x80080) >> 8;
if (run_x1 > x0 && alpha > 0x80ff)
{
run[0].x = x0;
run[0].alpha = alpha;
n_run++;
}
for (i = 0; i < n_steps - 1; i++)
{
running_sum += steps[i].delta;
run_x0 = run_x1;
run_x1 = steps[i + 1].x;
if (run_x1 > run_x0)
{
run[n_run].x = run_x0;
alpha = ((running_sum >> 8) * opacity + 0x80080) >> 8;
run[n_run].alpha = alpha;
n_run++;
}
}
if (x1 > run_x1)
{
running_sum += steps[n_steps - 1].delta;
run[n_run].x = run_x1;
alpha = ((running_sum >> 8) * opacity + 0x80080) >> 8;
run[n_run].alpha = alpha;
n_run++;
}
if (alpha > 0x80ff)
{
run[n_run].x = x1;
run[n_run].alpha = 0x8000;
n_run++;
}
}
render->n_run = n_run;
art_render_invoke_callbacks (render, z->dest_ptr, y);
z->dest_ptr += render->rowstride;
}
static void
art_render_svp_callback_opacity_span (void *callback_data, int y,
int start, ArtSVPRenderAAStep *steps, int n_steps)
{
ArtMaskSourceSVP *z = (ArtMaskSourceSVP *)callback_data;
ArtRender *render = z->render;
int n_run = 0;
int n_span = 0;
int i;
art_u32 running_sum;
int x0 = render->x0;
int x1 = render->x1;
int run_x0, run_x1;
ArtRenderMaskRun *run = render->run;
int *span_x = render->span_x;
art_u32 opacity = render->opacity;
art_u32 alpha;
running_sum = start - 0x7f80;
if (n_steps > 0)
{
run_x1 = steps[0].x;
alpha = ((running_sum >> 8) * opacity + 0x800080) >> 8;
if (run_x1 > x0 && alpha > 0x80ff)
{
run[0].x = x0;
run[0].alpha = alpha;
n_run++;
span_x[0] = x0;
n_span++;
}
for (i = 0; i < n_steps - 1; i++)
{
running_sum += steps[i].delta;
run_x0 = run_x1;
run_x1 = steps[i + 1].x;
if (run_x1 > run_x0)
{
run[n_run].x = run_x0;
alpha = ((running_sum >> 8) * opacity + 0x800080) >> 8;
run[n_run].alpha = alpha;
n_run++;
if ((n_span & 1) != (alpha > 0x80ff))
span_x[n_span++] = run_x0;
}
}
if (x1 > run_x1)
{
running_sum += steps[n_steps - 1].delta;
run[n_run].x = run_x1;
alpha = ((running_sum >> 8) * opacity + 0x800080) >> 8;
run[n_run].alpha = alpha;
n_run++;
if ((n_span & 1) != (alpha > 0x80ff))
span_x[n_span++] = run_x1;
}
if (alpha > 0x80ff)
{
run[n_run].x = x1;
run[n_run].alpha = 0x8000;
n_run++;
span_x[n_span++] = x1;
}
}
render->n_run = n_run;
render->n_span = n_span;
art_render_invoke_callbacks (render, z->dest_ptr, y);
z->dest_ptr += render->rowstride;
}
static void
art_render_svp_invoke_driver (ArtMaskSource *self, ArtRender *render)
{
ArtMaskSourceSVP *z = (ArtMaskSourceSVP *)self;
void (*callback) (void *callback_data,
int y,
int start,
ArtSVPRenderAAStep *steps, int n_steps);
z->dest_ptr = render->pixels;
if (render->opacity == 0x10000)
{
if (render->need_span)
callback = art_render_svp_callback_span;
else
callback = art_render_svp_callback;
}
else
{
if (render->need_span)
callback = art_render_svp_callback_opacity_span;
else
callback = art_render_svp_callback_opacity;
}
art_svp_render_aa (z->svp,
render->x0, render->y0,
render->x1, render->y1, callback,
self);
art_render_svp_done (&self->super, render);
}
static void
art_render_svp_prepare (ArtMaskSource *self, ArtRender *render,
art_boolean first)
{
/* todo */
art_die ("art_render_svp non-driver mode not yet implemented.\n");
}
/**
* art_render_svp: Use an SVP as a render mask source.
* @render: Render object.
* @svp: SVP.
*
* Adds @svp to the render object as a mask. Note: @svp must remain
* allocated until art_render_invoke() is called on @render.
**/
void
art_render_svp (ArtRender *render, const ArtSVP *svp)
{
ArtMaskSourceSVP *mask_source;
mask_source = art_new (ArtMaskSourceSVP, 1);
mask_source->super.super.render = NULL;
mask_source->super.super.done = art_render_svp_done;
mask_source->super.can_drive = art_render_svp_can_drive;
mask_source->super.invoke_driver = art_render_svp_invoke_driver;
mask_source->super.prepare = art_render_svp_prepare;
mask_source->render = render;
mask_source->svp = svp;
art_render_add_mask_source (render, &mask_source->super);
}

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/*
* art_render_gradient.h: SVP mask source for modular rendering.
*
* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors: Raph Levien <raph@acm.org>
*/
#ifndef __ART_RENDER_SVP_H__
#define __ART_RENDER_SVP_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
void
art_render_svp (ArtRender *render, const ArtSVP *svp);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_RENDER_SVP_H__ */

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <string.h> /* for memset */
#include "art_misc.h"
#include "art_rgb.h"
#include "config.h" /* for endianness */
/* Basic operators for manipulating 24-bit packed RGB buffers. */
#define COLOR_RUN_COMPLEX
#ifdef COLOR_RUN_SIMPLE
/* This is really slow. Is there any way we might speed it up?
Two ideas:
First, maybe we should be working at 32-bit alignment. Then,
this can be a simple loop over word stores.
Second, we can keep working at 24-bit alignment, but have some
intelligence about storing. For example, we can iterate over
4-pixel chunks (aligned at 4 pixels), with an inner loop
something like:
*buf++ = v1;
*buf++ = v2;
*buf++ = v3;
One source of extra complexity is the need to make sure linebuf is
aligned to a 32-bit boundary.
This second alternative has some complexity to it, but is
appealing because it really minimizes the memory bandwidth. */
void
art_rgb_fill_run (art_u8 *buf, art_u8 r, art_u8 g, art_u8 b, gint n)
{
int i;
if (r == g && g == b)
{
memset (buf, g, n + n + n);
}
else
{
for (i = 0; i < n; i++)
{
*buf++ = r;
*buf++ = g;
*buf++ = b;
}
}
}
#endif
#ifdef COLOR_RUN_COMPLEX
/* This implements the second of the two ideas above. The test results
are _very_ encouraging - it seems the speed is within 10% of
memset, which is quite good! */
/**
* art_rgb_fill_run: fill a buffer a solid RGB color.
* @buf: Buffer to fill.
* @r: Red, range 0..255.
* @g: Green, range 0..255.
* @b: Blue, range 0..255.
* @n: Number of RGB triples to fill.
*
* Fills a buffer with @n copies of the (@r, @g, @b) triple. Thus,
* locations @buf (inclusive) through @buf + 3 * @n (exclusive) are
* written.
*
* The implementation of this routine is very highly optimized.
**/
void
art_rgb_fill_run (art_u8 *buf, art_u8 r, art_u8 g, art_u8 b, int n)
{
int i;
unsigned int v1, v2, v3;
if (r == g && g == b)
{
memset (buf, g, n + n + n);
}
else
{
if (n < 8)
{
for (i = 0; i < n; i++)
{
*buf++ = r;
*buf++ = g;
*buf++ = b;
}
} else {
/* handle prefix up to byte alignment */
/* I'm worried about this cast on sizeof(long) != sizeof(uchar *)
architectures, but it _should_ work. */
for (i = 0; ((unsigned long)buf) & 3; i++)
{
*buf++ = r;
*buf++ = g;
*buf++ = b;
}
#ifndef WORDS_BIGENDIAN
v1 = r | (g << 8) | (b << 16) | (r << 24);
v3 = (v1 << 8) | b;
v2 = (v3 << 8) | g;
#else
v1 = (r << 24) | (g << 16) | (b << 8) | r;
v2 = (v1 << 8) | g;
v3 = (v2 << 8) | b;
#endif
for (; i < n - 3; i += 4)
{
((art_u32 *)buf)[0] = v1;
((art_u32 *)buf)[1] = v2;
((art_u32 *)buf)[2] = v3;
buf += 12;
}
/* handle postfix */
for (; i < n; i++)
{
*buf++ = r;
*buf++ = g;
*buf++ = b;
}
}
}
}
#endif
/**
* art_rgb_run_alpha: Render semitransparent color over RGB buffer.
* @buf: Buffer for rendering.
* @r: Red, range 0..255.
* @g: Green, range 0..255.
* @b: Blue, range 0..255.
* @alpha: Alpha, range 0..256.
* @n: Number of RGB triples to render.
*
* Renders a sequential run of solid (@r, @g, @b) color over @buf with
* opacity @alpha.
**/
void
art_rgb_run_alpha (art_u8 *buf, art_u8 r, art_u8 g, art_u8 b, int alpha, int n)
{
int i;
int v;
for (i = 0; i < n; i++)
{
v = *buf;
*buf++ = v + (((r - v) * alpha + 0x80) >> 8);
v = *buf;
*buf++ = v + (((g - v) * alpha + 0x80) >> 8);
v = *buf;
*buf++ = v + (((b - v) * alpha + 0x80) >> 8);
}
}

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other-licenses/libart_lgpl/art_rgb.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_RGB_H__
#define __ART_RGB_H__
#ifdef __cplusplus
extern "C" {
#endif
void
art_rgb_fill_run (art_u8 *buf, art_u8 r, art_u8 g, art_u8 b, int n);
void
art_rgb_run_alpha (art_u8 *buf, art_u8 r, art_u8 g, art_u8 b, int alpha,
int n);
#ifdef __cplusplus
}
#endif
#endif

147
other-licenses/libart_lgpl/art_rgb_a_affine.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <math.h>
#include "art_misc.h"
#include "art_point.h"
#include "art_affine.h"
#include "art_rgb_affine_private.h"
#include "art_rgb_a_affine.h"
/* This module handles compositing of affine-transformed alpha only images
over rgb pixel buffers. */
/* Composite the source image over the destination image, applying the
affine transform. */
/**
* art_rgb_a_affine: Affine transform source Alpha image and composite.
* @dst: Destination image RGB buffer.
* @x0: Left coordinate of destination rectangle.
* @y0: Top coordinate of destination rectangle.
* @x1: Right coordinate of destination rectangle.
* @y1: Bottom coordinate of destination rectangle.
* @dst_rowstride: Rowstride of @dst buffer.
* @src: Source image alpha buffer.
* @src_width: Width of source image.
* @src_height: Height of source image.
* @src_rowstride: Rowstride of @src buffer.
* @rgb: RGB foreground color, in 0xRRGGBB.
* @affine: Affine transform.
* @level: Filter level.
* @alphagamma: #ArtAlphaGamma for gamma-correcting the compositing.
*
* Affine transform the solid color rgb with alpha specified by the
* source image stored in @src, compositing over the area of destination
* image @dst specified by the rectangle (@x0, @y0) - (@x1, @y1).
* As usual in libart, the left and top edges of this rectangle are
* included, and the right and bottom edges are excluded.
*
* The @alphagamma parameter specifies that the alpha compositing be
* done in a gamma-corrected color space. In the current
* implementation, it is ignored.
*
* The @level parameter specifies the speed/quality tradeoff of the
* image interpolation. Currently, only ART_FILTER_NEAREST is
* implemented.
**/
void
art_rgb_a_affine (art_u8 *dst,
int x0, int y0, int x1, int y1, int dst_rowstride,
const art_u8 *src,
int src_width, int src_height, int src_rowstride,
art_u32 rgb,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alphagamma)
{
/* Note: this is a slow implementation, and is missing all filter
levels other than NEAREST. It is here for clarity of presentation
and to establish the interface. */
int x, y;
double inv[6];
art_u8 *dst_p, *dst_linestart;
const art_u8 *src_p;
ArtPoint pt, src_pt;
int src_x, src_y;
int alpha;
art_u8 bg_r, bg_g, bg_b;
art_u8 fg_r, fg_g, fg_b;
int tmp;
int run_x0, run_x1;
art_u8 r, g, b;
r = (rgb>>16)&0xff;
g = (rgb>>8)&0xff;
b = (rgb)&0xff;
dst_linestart = dst;
art_affine_invert (inv, affine);
for (y = y0; y < y1; y++)
{
pt.y = y + 0.5;
run_x0 = x0;
run_x1 = x1;
art_rgb_affine_run (&run_x0, &run_x1, y, src_width, src_height,
inv);
dst_p = dst_linestart + (run_x0 - x0) * 3;
for (x = run_x0; x < run_x1; x++)
{
pt.x = x + 0.5;
art_affine_point (&src_pt, &pt, inv);
src_x = floor (src_pt.x);
src_y = floor (src_pt.y);
src_p = src + (src_y * src_rowstride) + src_x;
if (src_x >= 0 && src_x < src_width &&
src_y >= 0 && src_y < src_height)
{
alpha = *src_p;
if (alpha)
{
if (alpha == 255)
{
dst_p[0] = r;
dst_p[1] = g;
dst_p[2] = b;
}
else
{
bg_r = dst_p[0];
bg_g = dst_p[1];
bg_b = dst_p[2];
tmp = (r - bg_r) * alpha;
fg_r = bg_r + ((tmp + (tmp >> 8) + 0x80) >> 8);
tmp = (g - bg_g) * alpha;
fg_g = bg_g + ((tmp + (tmp >> 8) + 0x80) >> 8);
tmp = (b - bg_b) * alpha;
fg_b = bg_b + ((tmp + (tmp >> 8) + 0x80) >> 8);
dst_p[0] = fg_r;
dst_p[1] = fg_g;
dst_p[2] = fg_b;
}
}
} else { dst_p[0] = 255; dst_p[1] = 0; dst_p[2] = 0; }
dst_p += 3;
}
dst_linestart += dst_rowstride;
}
}

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other-licenses/libart_lgpl/art_rgb_a_affine.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_RGB_A_AFFINE_H__
#define __ART_RGB_A_AFFINE_H__
/* This module handles compositing of affine-transformed alpha only images
over rgb pixel buffers. */
#ifdef LIBART_COMPILATION
#include "art_filterlevel.h"
#include "art_alphagamma.h"
#else
#include <libart_lgpl/art_filterlevel.h>
#include <libart_lgpl/art_alphagamma.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
void
art_rgb_a_affine (art_u8 *dst,
int x0, int y0, int x1, int y1, int dst_rowstride,
const art_u8 *src,
int src_width, int src_height, int src_rowstride,
art_u32 rgb,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alphagamma);
#ifdef __cplusplus
}
#endif
#endif

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <math.h>
#include "art_misc.h"
#include "art_point.h"
#include "art_affine.h"
#include "art_rgb_affine.h"
#include "art_rgb_affine_private.h"
/* This module handles compositing of affine-transformed rgb images
over rgb pixel buffers. */
/**
* art_rgb_affine: Affine transform source RGB image and composite.
* @dst: Destination image RGB buffer.
* @x0: Left coordinate of destination rectangle.
* @y0: Top coordinate of destination rectangle.
* @x1: Right coordinate of destination rectangle.
* @y1: Bottom coordinate of destination rectangle.
* @dst_rowstride: Rowstride of @dst buffer.
* @src: Source image RGB buffer.
* @src_width: Width of source image.
* @src_height: Height of source image.
* @src_rowstride: Rowstride of @src buffer.
* @affine: Affine transform.
* @level: Filter level.
* @alphagamma: #ArtAlphaGamma for gamma-correcting the compositing.
*
* Affine transform the source image stored in @src, compositing over
* the area of destination image @dst specified by the rectangle
* (@x0, @y0) - (@x1, @y1). As usual in libart, the left and top edges
* of this rectangle are included, and the right and bottom edges are
* excluded.
*
* The @alphagamma parameter specifies that the alpha compositing be done
* in a gamma-corrected color space. Since the source image is opaque RGB,
* this argument only affects the edges. In the current implementation,
* it is ignored.
*
* The @level parameter specifies the speed/quality tradeoff of the
* image interpolation. Currently, only ART_FILTER_NEAREST is
* implemented.
**/
void
art_rgb_affine (art_u8 *dst, int x0, int y0, int x1, int y1, int dst_rowstride,
const art_u8 *src,
int src_width, int src_height, int src_rowstride,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alphagamma)
{
/* Note: this is a slow implementation, and is missing all filter
levels other than NEAREST. It is here for clarity of presentation
and to establish the interface. */
int x, y;
double inv[6];
art_u8 *dst_p, *dst_linestart;
const art_u8 *src_p;
ArtPoint pt, src_pt;
int src_x, src_y;
int run_x0, run_x1;
dst_linestart = dst;
art_affine_invert (inv, affine);
for (y = y0; y < y1; y++)
{
pt.y = y + 0.5;
run_x0 = x0;
run_x1 = x1;
art_rgb_affine_run (&run_x0, &run_x1, y, src_width, src_height,
inv);
dst_p = dst_linestart + (run_x0 - x0) * 3;
for (x = run_x0; x < run_x1; x++)
{
pt.x = x + 0.5;
art_affine_point (&src_pt, &pt, inv);
src_x = floor (src_pt.x);
src_y = floor (src_pt.y);
src_p = src + (src_y * src_rowstride) + src_x * 3;
dst_p[0] = src_p[0];
dst_p[1] = src_p[1];
dst_p[2] = src_p[2];
dst_p += 3;
}
dst_linestart += dst_rowstride;
}
}

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_RGB_AFFINE_H__
#define __ART_RGB_AFFINE_H__
/* This module handles compositing of affine-transformed rgb images
over rgb pixel buffers. */
#ifdef LIBART_COMPILATION
#include "art_filterlevel.h"
#include "art_alphagamma.h"
#else
#include <libart_lgpl/art_filterlevel.h>
#include <libart_lgpl/art_alphagamma.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
void
art_rgb_affine (art_u8 *dst, int x0, int y0, int x1, int y1, int dst_rowstride,
const art_u8 *src,
int src_width, int src_height, int src_rowstride,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alphagamma);
#ifdef __cplusplus
}
#endif
#endif

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other-licenses/libart_lgpl/art_rgb_affine_private.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <math.h>
#include "art_misc.h"
#include "art_point.h"
#include "art_affine.h"
#include "art_rgb_affine_private.h"
/* Private functions for the rgb affine image compositors - primarily,
the determination of runs, eliminating the need for source image
bbox calculation in the inner loop. */
/* Determine a "run", such that the inverse affine of all pixels from
(x0, y) inclusive to (x1, y) exclusive fit within the bounds
of the source image.
Initial values of x0, x1, and result values stored in first two
pointer arguments.
*/
#define EPSILON 1e-6
void
art_rgb_affine_run (int *p_x0, int *p_x1, int y,
int src_width, int src_height,
const double affine[6])
{
int x0, x1;
double z;
double x_intercept;
int xi;
x0 = *p_x0;
x1 = *p_x1;
/* do left and right edges */
if (affine[0] > EPSILON)
{
z = affine[2] * (y + 0.5) + affine[4];
x_intercept = -z / affine[0];
xi = ceil (x_intercept + EPSILON - 0.5);
if (xi > x0)
x0 = xi;
x_intercept = (-z + src_width) / affine[0];
xi = ceil (x_intercept - EPSILON - 0.5);
if (xi < x1)
x1 = xi;
}
else if (affine[0] < -EPSILON)
{
z = affine[2] * (y + 0.5) + affine[4];
x_intercept = (-z + src_width) / affine[0];
xi = ceil (x_intercept + EPSILON - 0.5);
if (xi > x0)
x0 = xi;
x_intercept = -z / affine[0];
xi = ceil (x_intercept - EPSILON - 0.5);
if (xi < x1)
x1 = xi;
}
else
{
z = affine[2] * (y + 0.5) + affine[4];
if (z < 0 || z >= src_width)
{
*p_x1 = *p_x0;
return;
}
}
/* do top and bottom edges */
if (affine[1] > EPSILON)
{
z = affine[3] * (y + 0.5) + affine[5];
x_intercept = -z / affine[1];
xi = ceil (x_intercept + EPSILON - 0.5);
if (xi > x0)
x0 = xi;
x_intercept = (-z + src_height) / affine[1];
xi = ceil (x_intercept - EPSILON - 0.5);
if (xi < x1)
x1 = xi;
}
else if (affine[1] < -EPSILON)
{
z = affine[3] * (y + 0.5) + affine[5];
x_intercept = (-z + src_height) / affine[1];
xi = ceil (x_intercept + EPSILON - 0.5);
if (xi > x0)
x0 = xi;
x_intercept = -z / affine[1];
xi = ceil (x_intercept - EPSILON - 0.5);
if (xi < x1)
x1 = xi;
}
else
{
z = affine[3] * (y + 0.5) + affine[5];
if (z < 0 || z >= src_height)
{
*p_x1 = *p_x0;
return;
}
}
*p_x0 = x0;
*p_x1 = x1;
}

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other-licenses/libart_lgpl/art_rgb_affine_private.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_RGB_AFFINE_PRIVATE_H__
#define __ART_RGB_AFFINE_PRIVATE_H__
/* This module handles compositing of affine-transformed rgb images
over rgb pixel buffers. */
#ifdef __cplusplus
extern "C" {
#endif
void
art_rgb_affine_run (int *p_x0, int *p_x1, int y,
int src_width, int src_height,
const double affine[6]);
#ifdef __cplusplus
}
#endif
#endif

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other-licenses/libart_lgpl/art_rgb_bitmap_affine.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <math.h>
#include "art_misc.h"
#include "art_point.h"
#include "art_affine.h"
#include "art_rgb_affine_private.h"
#include "art_rgb_bitmap_affine.h"
/* This module handles compositing of affine-transformed bitmap images
over rgb pixel buffers. */
/* Composite the source image over the destination image, applying the
affine transform. Foreground color is given and assumed to be
opaque, background color is assumed to be fully transparent. */
static void
art_rgb_bitmap_affine_opaque (art_u8 *dst,
int x0, int y0, int x1, int y1,
int dst_rowstride,
const art_u8 *src,
int src_width, int src_height, int src_rowstride,
art_u32 rgb,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alphagamma)
{
/* Note: this is a slow implementation, and is missing all filter
levels other than NEAREST. It is here for clarity of presentation
and to establish the interface. */
int x, y;
double inv[6];
art_u8 *dst_p, *dst_linestart;
const art_u8 *src_p;
ArtPoint pt, src_pt;
int src_x, src_y;
art_u8 r, g, b;
int run_x0, run_x1;
r = rgb >> 16;
g = (rgb >> 8) & 0xff;
b = rgb & 0xff;
dst_linestart = dst;
art_affine_invert (inv, affine);
for (y = y0; y < y1; y++)
{
pt.y = y + 0.5;
run_x0 = x0;
run_x1 = x1;
art_rgb_affine_run (&run_x0, &run_x1, y, src_width, src_height,
inv);
dst_p = dst_linestart + (run_x0 - x0) * 3;
for (x = run_x0; x < run_x1; x++)
{
pt.x = x + 0.5;
art_affine_point (&src_pt, &pt, inv);
src_x = floor (src_pt.x);
src_y = floor (src_pt.y);
src_p = src + (src_y * src_rowstride) + (src_x >> 3);
if (*src_p & (128 >> (src_x & 7)))
{
dst_p[0] = r;
dst_p[1] = g;
dst_p[2] = b;
}
dst_p += 3;
}
dst_linestart += dst_rowstride;
}
}
/* Composite the source image over the destination image, applying the
affine transform. Foreground color is given, background color is
assumed to be fully transparent. */
/**
* art_rgb_bitmap_affine: Affine transform source bitmap image and composite.
* @dst: Destination image RGB buffer.
* @x0: Left coordinate of destination rectangle.
* @y0: Top coordinate of destination rectangle.
* @x1: Right coordinate of destination rectangle.
* @y1: Bottom coordinate of destination rectangle.
* @dst_rowstride: Rowstride of @dst buffer.
* @src: Source image bitmap buffer.
* @src_width: Width of source image.
* @src_height: Height of source image.
* @src_rowstride: Rowstride of @src buffer.
* @rgba: RGBA foreground color, in 0xRRGGBBAA.
* @affine: Affine transform.
* @level: Filter level.
* @alphagamma: #ArtAlphaGamma for gamma-correcting the compositing.
*
* Affine transform the source image stored in @src, compositing over
* the area of destination image @dst specified by the rectangle
* (@x0, @y0) - (@x1, @y1).
*
* The source bitmap stored with MSB as the leftmost pixel. Source 1
* bits correspond to the semitransparent color @rgba, while source 0
* bits are transparent.
*
* See art_rgb_affine() for a description of additional parameters.
**/
void
art_rgb_bitmap_affine (art_u8 *dst,
int x0, int y0, int x1, int y1, int dst_rowstride,
const art_u8 *src,
int src_width, int src_height, int src_rowstride,
art_u32 rgba,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alphagamma)
{
/* Note: this is a slow implementation, and is missing all filter
levels other than NEAREST. It is here for clarity of presentation
and to establish the interface. */
int x, y;
double inv[6];
art_u8 *dst_p, *dst_linestart;
const art_u8 *src_p;
ArtPoint pt, src_pt;
int src_x, src_y;
int alpha;
art_u8 bg_r, bg_g, bg_b;
art_u8 fg_r, fg_g, fg_b;
art_u8 r, g, b;
int run_x0, run_x1;
alpha = rgba & 0xff;
if (alpha == 0xff)
{
art_rgb_bitmap_affine_opaque (dst, x0, y0, x1, y1, dst_rowstride,
src,
src_width, src_height, src_rowstride,
rgba >> 8,
affine,
level,
alphagamma);
return;
}
/* alpha = (65536 * alpha) / 255; */
alpha = (alpha << 8) + alpha + (alpha >> 7);
r = rgba >> 24;
g = (rgba >> 16) & 0xff;
b = (rgba >> 8) & 0xff;
dst_linestart = dst;
art_affine_invert (inv, affine);
for (y = y0; y < y1; y++)
{
pt.y = y + 0.5;
run_x0 = x0;
run_x1 = x1;
art_rgb_affine_run (&run_x0, &run_x1, y, src_width, src_height,
inv);
dst_p = dst_linestart + (run_x0 - x0) * 3;
for (x = run_x0; x < run_x1; x++)
{
pt.x = x + 0.5;
art_affine_point (&src_pt, &pt, inv);
src_x = floor (src_pt.x);
src_y = floor (src_pt.y);
src_p = src + (src_y * src_rowstride) + (src_x >> 3);
if (*src_p & (128 >> (src_x & 7)))
{
bg_r = dst_p[0];
bg_g = dst_p[1];
bg_b = dst_p[2];
fg_r = bg_r + (((r - bg_r) * alpha + 0x8000) >> 16);
fg_g = bg_g + (((g - bg_g) * alpha + 0x8000) >> 16);
fg_b = bg_b + (((b - bg_b) * alpha + 0x8000) >> 16);
dst_p[0] = fg_r;
dst_p[1] = fg_g;
dst_p[2] = fg_b;
}
dst_p += 3;
}
dst_linestart += dst_rowstride;
}
}

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other-licenses/libart_lgpl/art_rgb_bitmap_affine.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_RGB_BITMAP_AFFINE_H__
#define __ART_RGB_BITMAP_AFFINE_H__
/* This module handles compositing of affine-transformed bitmap images
over rgb pixel buffers. */
#ifdef LIBART_COMPILATION
#include "art_filterlevel.h"
#include "art_alphagamma.h"
#else
#include <libart_lgpl/art_filterlevel.h>
#include <libart_lgpl/art_alphagamma.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
void
art_rgb_bitmap_affine (art_u8 *dst,
int x0, int y0, int x1, int y1, int dst_rowstride,
const art_u8 *src,
int src_width, int src_height, int src_rowstride,
art_u32 rgba,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alphagamma);
#ifdef __cplusplus
}
#endif
#endif

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other-licenses/libart_lgpl/art_rgb_pixbuf_affine.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <math.h>
#include "art_misc.h"
#include "art_point.h"
#include "art_affine.h"
#include "art_pixbuf.h"
#include "art_rgb_affine.h"
#include "art_rgb_affine.h"
#include "art_rgb_rgba_affine.h"
#include "art_rgb_pixbuf_affine.h"
/* This module handles compositing of affine-transformed generic
pixbuf images over rgb pixel buffers. */
/* Composite the source image over the destination image, applying the
affine transform. */
/**
* art_rgb_pixbuf_affine: Affine transform source RGB pixbuf and composite.
* @dst: Destination image RGB buffer.
* @x0: Left coordinate of destination rectangle.
* @y0: Top coordinate of destination rectangle.
* @x1: Right coordinate of destination rectangle.
* @y1: Bottom coordinate of destination rectangle.
* @dst_rowstride: Rowstride of @dst buffer.
* @pixbuf: source image pixbuf.
* @affine: Affine transform.
* @level: Filter level.
* @alphagamma: #ArtAlphaGamma for gamma-correcting the compositing.
*
* Affine transform the source image stored in @src, compositing over
* the area of destination image @dst specified by the rectangle
* (@x0, @y0) - (@x1, @y1). As usual in libart, the left and top edges
* of this rectangle are included, and the right and bottom edges are
* excluded.
*
* The @alphagamma parameter specifies that the alpha compositing be
* done in a gamma-corrected color space. In the current
* implementation, it is ignored.
*
* The @level parameter specifies the speed/quality tradeoff of the
* image interpolation. Currently, only ART_FILTER_NEAREST is
* implemented.
**/
void
art_rgb_pixbuf_affine (art_u8 *dst,
int x0, int y0, int x1, int y1, int dst_rowstride,
const ArtPixBuf *pixbuf,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alphagamma)
{
if (pixbuf->format != ART_PIX_RGB)
{
art_warn ("art_rgb_pixbuf_affine: need RGB format image\n");
return;
}
if (pixbuf->bits_per_sample != 8)
{
art_warn ("art_rgb_pixbuf_affine: need 8-bit sample data\n");
return;
}
if (pixbuf->n_channels != 3 + (pixbuf->has_alpha != 0))
{
art_warn ("art_rgb_pixbuf_affine: need 8-bit sample data\n");
return;
}
if (pixbuf->has_alpha)
art_rgb_rgba_affine (dst, x0, y0, x1, y1, dst_rowstride,
pixbuf->pixels,
pixbuf->width, pixbuf->height, pixbuf->rowstride,
affine,
level,
alphagamma);
else
art_rgb_affine (dst, x0, y0, x1, y1, dst_rowstride,
pixbuf->pixels,
pixbuf->width, pixbuf->height, pixbuf->rowstride,
affine,
level,
alphagamma);
}

52
other-licenses/libart_lgpl/art_rgb_pixbuf_affine.h Normal file
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@ -0,0 +1,52 @@
/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_RGB_PIXBUF_AFFINE_H__
#define __ART_RGB_PIXBUF_AFFINE_H__
/* This module handles compositing of affine-transformed generic
pixbuf images over rgb pixel buffers. */
#ifdef LIBART_COMPILATION
#include "art_filterlevel.h"
#include "art_alphagamma.h"
#include "art_pixbuf.h"
#else
#include <libart_lgpl/art_filterlevel.h>
#include <libart_lgpl/art_alphagamma.h>
#include <libart_lgpl/art_pixbuf.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
void
art_rgb_pixbuf_affine (art_u8 *dst,
int x0, int y0, int x1, int y1, int dst_rowstride,
const ArtPixBuf *pixbuf,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alphagamma);
#ifdef __cplusplus
}
#endif
#endif

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other-licenses/libart_lgpl/art_rgb_rgba_affine.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <math.h>
#include "art_misc.h"
#include "art_point.h"
#include "art_affine.h"
#include "art_rgb_affine_private.h"
#include "art_rgb_rgba_affine.h"
/* This module handles compositing of affine-transformed rgba images
over rgb pixel buffers. */
/* Composite the source image over the destination image, applying the
affine transform. */
/**
* art_rgb_rgba_affine: Affine transform source RGBA image and composite.
* @dst: Destination image RGB buffer.
* @x0: Left coordinate of destination rectangle.
* @y0: Top coordinate of destination rectangle.
* @x1: Right coordinate of destination rectangle.
* @y1: Bottom coordinate of destination rectangle.
* @dst_rowstride: Rowstride of @dst buffer.
* @src: Source image RGBA buffer.
* @src_width: Width of source image.
* @src_height: Height of source image.
* @src_rowstride: Rowstride of @src buffer.
* @affine: Affine transform.
* @level: Filter level.
* @alphagamma: #ArtAlphaGamma for gamma-correcting the compositing.
*
* Affine transform the source image stored in @src, compositing over
* the area of destination image @dst specified by the rectangle
* (@x0, @y0) - (@x1, @y1). As usual in libart, the left and top edges
* of this rectangle are included, and the right and bottom edges are
* excluded.
*
* The @alphagamma parameter specifies that the alpha compositing be
* done in a gamma-corrected color space. In the current
* implementation, it is ignored.
*
* The @level parameter specifies the speed/quality tradeoff of the
* image interpolation. Currently, only ART_FILTER_NEAREST is
* implemented.
**/
void
art_rgb_rgba_affine (art_u8 *dst,
int x0, int y0, int x1, int y1, int dst_rowstride,
const art_u8 *src,
int src_width, int src_height, int src_rowstride,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alphagamma)
{
/* Note: this is a slow implementation, and is missing all filter
levels other than NEAREST. It is here for clarity of presentation
and to establish the interface. */
int x, y;
double inv[6];
art_u8 *dst_p, *dst_linestart;
const art_u8 *src_p;
ArtPoint pt, src_pt;
int src_x, src_y;
int alpha;
art_u8 bg_r, bg_g, bg_b;
art_u8 fg_r, fg_g, fg_b;
int tmp;
int run_x0, run_x1;
dst_linestart = dst;
art_affine_invert (inv, affine);
for (y = y0; y < y1; y++)
{
pt.y = y + 0.5;
run_x0 = x0;
run_x1 = x1;
art_rgb_affine_run (&run_x0, &run_x1, y, src_width, src_height,
inv);
dst_p = dst_linestart + (run_x0 - x0) * 3;
for (x = run_x0; x < run_x1; x++)
{
pt.x = x + 0.5;
art_affine_point (&src_pt, &pt, inv);
src_x = floor (src_pt.x);
src_y = floor (src_pt.y);
src_p = src + (src_y * src_rowstride) + src_x * 4;
if (src_x >= 0 && src_x < src_width &&
src_y >= 0 && src_y < src_height)
{
alpha = src_p[3];
if (alpha)
{
if (alpha == 255)
{
dst_p[0] = src_p[0];
dst_p[1] = src_p[1];
dst_p[2] = src_p[2];
}
else
{
bg_r = dst_p[0];
bg_g = dst_p[1];
bg_b = dst_p[2];
tmp = (src_p[0] - bg_r) * alpha;
fg_r = bg_r + ((tmp + (tmp >> 8) + 0x80) >> 8);
tmp = (src_p[1] - bg_g) * alpha;
fg_g = bg_g + ((tmp + (tmp >> 8) + 0x80) >> 8);
tmp = (src_p[2] - bg_b) * alpha;
fg_b = bg_b + ((tmp + (tmp >> 8) + 0x80) >> 8);
dst_p[0] = fg_r;
dst_p[1] = fg_g;
dst_p[2] = fg_b;
}
}
} else { dst_p[0] = 255; dst_p[1] = 0; dst_p[2] = 0; }
dst_p += 3;
}
dst_linestart += dst_rowstride;
}
}

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_RGB_RGBA_AFFINE_H__
#define __ART_RGB_RGBA_AFFINE_H__
/* This module handles compositing of affine-transformed rgba images
over rgb pixel buffers. */
#ifdef LIBART_COMPILATION
#include "art_filterlevel.h"
#include "art_alphagamma.h"
#else
#include <libart_lgpl/art_filterlevel.h>
#include <libart_lgpl/art_alphagamma.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
void
art_rgb_rgba_affine (art_u8 *dst,
int x0, int y0, int x1, int y1, int dst_rowstride,
const art_u8 *src,
int src_width, int src_height, int src_rowstride,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alphagamma);
#ifdef __cplusplus
}
#endif
#endif

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Render a sorted vector path into an RGB buffer. */
#include "art_misc.h"
#include "art_svp.h"
#include "art_svp_render_aa.h"
#include "art_rgb.h"
#include "art_rgb_svp.h"
typedef struct _ArtRgbSVPData ArtRgbSVPData;
typedef struct _ArtRgbSVPAlphaData ArtRgbSVPAlphaData;
struct _ArtRgbSVPData {
art_u32 rgbtab[256];
art_u8 *buf;
int rowstride;
int x0, x1;
};
struct _ArtRgbSVPAlphaData {
int alphatab[256];
art_u8 r, g, b, alpha;
art_u8 *buf;
int rowstride;
int x0, x1;
};
static void
art_rgb_svp_callback (void *callback_data, int y,
int start, ArtSVPRenderAAStep *steps, int n_steps)
{
ArtRgbSVPData *data = (ArtRgbSVPData *)callback_data;
art_u8 *linebuf;
int run_x0, run_x1;
art_u32 running_sum = start;
art_u32 rgb;
int x0, x1;
int k;
linebuf = data->buf;
x0 = data->x0;
x1 = data->x1;
if (n_steps > 0)
{
run_x1 = steps[0].x;
if (run_x1 > x0)
{
rgb = data->rgbtab[(running_sum >> 16) & 0xff];
art_rgb_fill_run (linebuf,
rgb >> 16, (rgb >> 8) & 0xff, rgb & 0xff,
run_x1 - x0);
}
for (k = 0; k < n_steps - 1; k++)
{
running_sum += steps[k].delta;
run_x0 = run_x1;
run_x1 = steps[k + 1].x;
if (run_x1 > run_x0)
{
rgb = data->rgbtab[(running_sum >> 16) & 0xff];
art_rgb_fill_run (linebuf + (run_x0 - x0) * 3,
rgb >> 16, (rgb >> 8) & 0xff, rgb & 0xff,
run_x1 - run_x0);
}
}
running_sum += steps[k].delta;
if (x1 > run_x1)
{
rgb = data->rgbtab[(running_sum >> 16) & 0xff];
art_rgb_fill_run (linebuf + (run_x1 - x0) * 3,
rgb >> 16, (rgb >> 8) & 0xff, rgb & 0xff,
x1 - run_x1);
}
}
else
{
rgb = data->rgbtab[(running_sum >> 16) & 0xff];
art_rgb_fill_run (linebuf,
rgb >> 16, (rgb >> 8) & 0xff, rgb & 0xff,
x1 - x0);
}
data->buf += data->rowstride;
}
/* Render the vector path into the RGB buffer. */
/**
* art_rgb_svp_aa: Render sorted vector path into RGB buffer.
* @svp: The source sorted vector path.
* @x0: Left coordinate of destination rectangle.
* @y0: Top coordinate of destination rectangle.
* @x1: Right coordinate of destination rectangle.
* @y1: Bottom coordinate of destination rectangle.
* @fg_color: Foreground color in 0xRRGGBB format.
* @bg_color: Background color in 0xRRGGBB format.
* @buf: Destination RGB buffer.
* @rowstride: Rowstride of @buf buffer.
* @alphagamma: #ArtAlphaGamma for gamma-correcting the rendering.
*
* Renders the shape specified with @svp into the @buf RGB buffer.
* @x1 - @x0 specifies the width, and @y1 - @y0 specifies the height,
* of the rectangle rendered. The new pixels are stored starting at
* the first byte of @buf. Thus, the @x0 and @y0 parameters specify
* an offset within @svp, and may be tweaked as a way of doing
* integer-pixel translations without fiddling with @svp itself.
*
* The @fg_color and @bg_color arguments specify the opaque colors to
* be used for rendering. For pixels of entirely 0 winding-number,
* @bg_color is used. For pixels of entirely 1 winding number,
* @fg_color is used. In between, the color is interpolated based on
* the fraction of the pixel with a winding number of 1. If
* @alphagamma is NULL, then linear interpolation (in pixel counts) is
* the default. Otherwise, the interpolation is as specified by
* @alphagamma.
**/
void
art_rgb_svp_aa (const ArtSVP *svp,
int x0, int y0, int x1, int y1,
art_u32 fg_color, art_u32 bg_color,
art_u8 *buf, int rowstride,
ArtAlphaGamma *alphagamma)
{
ArtRgbSVPData data;
int r_fg, g_fg, b_fg;
int r_bg, g_bg, b_bg;
int r, g, b;
int dr, dg, db;
int i;
if (alphagamma == NULL)
{
r_fg = fg_color >> 16;
g_fg = (fg_color >> 8) & 0xff;
b_fg = fg_color & 0xff;
r_bg = bg_color >> 16;
g_bg = (bg_color >> 8) & 0xff;
b_bg = bg_color & 0xff;
r = (r_bg << 16) + 0x8000;
g = (g_bg << 16) + 0x8000;
b = (b_bg << 16) + 0x8000;
dr = ((r_fg - r_bg) << 16) / 255;
dg = ((g_fg - g_bg) << 16) / 255;
db = ((b_fg - b_bg) << 16) / 255;
for (i = 0; i < 256; i++)
{
data.rgbtab[i] = (r & 0xff0000) | ((g & 0xff0000) >> 8) | (b >> 16);
r += dr;
g += dg;
b += db;
}
}
else
{
int *table;
art_u8 *invtab;
table = alphagamma->table;
r_fg = table[fg_color >> 16];
g_fg = table[(fg_color >> 8) & 0xff];
b_fg = table[fg_color & 0xff];
r_bg = table[bg_color >> 16];
g_bg = table[(bg_color >> 8) & 0xff];
b_bg = table[bg_color & 0xff];
r = (r_bg << 16) + 0x8000;
g = (g_bg << 16) + 0x8000;
b = (b_bg << 16) + 0x8000;
dr = ((r_fg - r_bg) << 16) / 255;
dg = ((g_fg - g_bg) << 16) / 255;
db = ((b_fg - b_bg) << 16) / 255;
invtab = alphagamma->invtable;
for (i = 0; i < 256; i++)
{
data.rgbtab[i] = (invtab[r >> 16] << 16) |
(invtab[g >> 16] << 8) |
invtab[b >> 16];
r += dr;
g += dg;
b += db;
}
}
data.buf = buf;
data.rowstride = rowstride;
data.x0 = x0;
data.x1 = x1;
art_svp_render_aa (svp, x0, y0, x1, y1, art_rgb_svp_callback, &data);
}
static void
art_rgb_svp_alpha_callback (void *callback_data, int y,
int start, ArtSVPRenderAAStep *steps, int n_steps)
{
ArtRgbSVPAlphaData *data = (ArtRgbSVPAlphaData *)callback_data;
art_u8 *linebuf;
int run_x0, run_x1;
art_u32 running_sum = start;
int x0, x1;
int k;
art_u8 r, g, b;
int *alphatab;
int alpha;
linebuf = data->buf;
x0 = data->x0;
x1 = data->x1;
r = data->r;
g = data->g;
b = data->b;
alphatab = data->alphatab;
if (n_steps > 0)
{
run_x1 = steps[0].x;
if (run_x1 > x0)
{
alpha = (running_sum >> 16) & 0xff;
if (alpha)
art_rgb_run_alpha (linebuf,
r, g, b, alphatab[alpha],
run_x1 - x0);
}
for (k = 0; k < n_steps - 1; k++)
{
running_sum += steps[k].delta;
run_x0 = run_x1;
run_x1 = steps[k + 1].x;
if (run_x1 > run_x0)
{
alpha = (running_sum >> 16) & 0xff;
if (alpha)
art_rgb_run_alpha (linebuf + (run_x0 - x0) * 3,
r, g, b, alphatab[alpha],
run_x1 - run_x0);
}
}
running_sum += steps[k].delta;
if (x1 > run_x1)
{
alpha = (running_sum >> 16) & 0xff;
if (alpha)
art_rgb_run_alpha (linebuf + (run_x1 - x0) * 3,
r, g, b, alphatab[alpha],
x1 - run_x1);
}
}
else
{
alpha = (running_sum >> 16) & 0xff;
if (alpha)
art_rgb_run_alpha (linebuf,
r, g, b, alphatab[alpha],
x1 - x0);
}
data->buf += data->rowstride;
}
static void
art_rgb_svp_alpha_opaque_callback (void *callback_data, int y,
int start,
ArtSVPRenderAAStep *steps, int n_steps)
{
ArtRgbSVPAlphaData *data = (ArtRgbSVPAlphaData *)callback_data;
art_u8 *linebuf;
int run_x0, run_x1;
art_u32 running_sum = start;
int x0, x1;
int k;
art_u8 r, g, b;
int *alphatab;
int alpha;
linebuf = data->buf;
x0 = data->x0;
x1 = data->x1;
r = data->r;
g = data->g;
b = data->b;
alphatab = data->alphatab;
if (n_steps > 0)
{
run_x1 = steps[0].x;
if (run_x1 > x0)
{
alpha = running_sum >> 16;
if (alpha)
{
if (alpha >= 255)
art_rgb_fill_run (linebuf,
r, g, b,
run_x1 - x0);
else
art_rgb_run_alpha (linebuf,
r, g, b, alphatab[alpha],
run_x1 - x0);
}
}
for (k = 0; k < n_steps - 1; k++)
{
running_sum += steps[k].delta;
run_x0 = run_x1;
run_x1 = steps[k + 1].x;
if (run_x1 > run_x0)
{
alpha = running_sum >> 16;
if (alpha)
{
if (alpha >= 255)
art_rgb_fill_run (linebuf + (run_x0 - x0) * 3,
r, g, b,
run_x1 - run_x0);
else
art_rgb_run_alpha (linebuf + (run_x0 - x0) * 3,
r, g, b, alphatab[alpha],
run_x1 - run_x0);
}
}
}
running_sum += steps[k].delta;
if (x1 > run_x1)
{
alpha = running_sum >> 16;
if (alpha)
{
if (alpha >= 255)
art_rgb_fill_run (linebuf + (run_x1 - x0) * 3,
r, g, b,
x1 - run_x1);
else
art_rgb_run_alpha (linebuf + (run_x1 - x0) * 3,
r, g, b, alphatab[alpha],
x1 - run_x1);
}
}
}
else
{
alpha = running_sum >> 16;
if (alpha)
{
if (alpha >= 255)
art_rgb_fill_run (linebuf,
r, g, b,
x1 - x0);
else
art_rgb_run_alpha (linebuf,
r, g, b, alphatab[alpha],
x1 - x0);
}
}
data->buf += data->rowstride;
}
/**
* art_rgb_svp_alpha: Alpha-composite sorted vector path over RGB buffer.
* @svp: The source sorted vector path.
* @x0: Left coordinate of destination rectangle.
* @y0: Top coordinate of destination rectangle.
* @x1: Right coordinate of destination rectangle.
* @y1: Bottom coordinate of destination rectangle.
* @rgba: Color in 0xRRGGBBAA format.
* @buf: Destination RGB buffer.
* @rowstride: Rowstride of @buf buffer.
* @alphagamma: #ArtAlphaGamma for gamma-correcting the compositing.
*
* Renders the shape specified with @svp over the @buf RGB buffer.
* @x1 - @x0 specifies the width, and @y1 - @y0 specifies the height,
* of the rectangle rendered. The new pixels are stored starting at
* the first byte of @buf. Thus, the @x0 and @y0 parameters specify
* an offset within @svp, and may be tweaked as a way of doing
* integer-pixel translations without fiddling with @svp itself.
*
* The @rgba argument specifies the color for the rendering. Pixels of
* entirely 0 winding number are left untouched. Pixels of entirely
* 1 winding number have the color @rgba composited over them (ie,
* are replaced by the red, green, blue components of @rgba if the alpha
* component is 0xff). Pixels of intermediate coverage are interpolated
* according to the rule in @alphagamma, or default to linear if
* @alphagamma is NULL.
**/
void
art_rgb_svp_alpha (const ArtSVP *svp,
int x0, int y0, int x1, int y1,
art_u32 rgba,
art_u8 *buf, int rowstride,
ArtAlphaGamma *alphagamma)
{
ArtRgbSVPAlphaData data;
int r, g, b, alpha;
int i;
int a, da;
r = rgba >> 24;
g = (rgba >> 16) & 0xff;
b = (rgba >> 8) & 0xff;
alpha = rgba & 0xff;
data.r = r;
data.g = g;
data.b = b;
data.alpha = alpha;
a = 0x8000;
da = (alpha * 66051 + 0x80) >> 8; /* 66051 equals 2 ^ 32 / (255 * 255) */
for (i = 0; i < 256; i++)
{
data.alphatab[i] = a >> 16;
a += da;
}
data.buf = buf;
data.rowstride = rowstride;
data.x0 = x0;
data.x1 = x1;
if (alpha == 255)
art_svp_render_aa (svp, x0, y0, x1, y1, art_rgb_svp_alpha_opaque_callback,
&data);
else
art_svp_render_aa (svp, x0, y0, x1, y1, art_rgb_svp_alpha_callback, &data);
}

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other-licenses/libart_lgpl/art_rgb_svp.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_RGB_SVP_H__
#define __ART_RGB_SVP_H__
/* Render a sorted vector path into an RGB buffer. */
#ifdef LIBART_COMPILATION
#include "art_alphagamma.h"
#else
#include <libart_lgpl/art_alphagamma.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
void
art_rgb_svp_aa (const ArtSVP *svp,
int x0, int y0, int x1, int y1,
art_u32 fg_color, art_u32 bg_color,
art_u8 *buf, int rowstride,
ArtAlphaGamma *alphagamma);
void
art_rgb_svp_alpha (const ArtSVP *svp,
int x0, int y0, int x1, int y1,
art_u32 rgba,
art_u8 *buf, int rowstride,
ArtAlphaGamma *alphagamma);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_RGB_SVP_H__ */

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other-licenses/libart_lgpl/art_rgba.c Normal file
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/*
* art_rgba.c: Functions for manipulating RGBA pixel data.
*
* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include "art_misc.h"
#include "art_rgba.h"
#define ART_OPTIMIZE_SPACE
#ifndef ART_OPTIMIZE_SPACE
#include "art_rgba_table.c"
#endif
/**
* art_rgba_rgba_composite: Composite RGBA image over RGBA buffer.
* @dst: Destination RGBA buffer.
* @src: Source RGBA buffer.
* @n: Number of RGBA pixels to composite.
*
* Composites the RGBA pixels in @dst over the @src buffer.
**/
void
art_rgba_rgba_composite (art_u8 *dst, const art_u8 *src, int n)
{
int i;
#ifdef WORDS_BIGENDIAN
art_u32 src_rgba, dst_rgba;
#else
art_u32 src_abgr, dst_abgr;
#endif
art_u8 src_alpha, dst_alpha;
for (i = 0; i < n; i++)
{
#ifdef WORDS_BIGENDIAN
src_rgba = ((art_u32 *)src)[i];
src_alpha = src_rgba & 0xff;
#else
src_abgr = ((art_u32 *)src)[i];
src_alpha = (src_abgr >> 24) & 0xff;
#endif
if (src_alpha)
{
if (src_alpha == 0xff ||
(
#ifdef WORDS_BIGENDIAN
dst_rgba = ((art_u32 *)dst)[i],
dst_alpha = dst_rgba & 0xff,
#else
dst_abgr = ((art_u32 *)dst)[i],
dst_alpha = (dst_abgr >> 24),
#endif
dst_alpha == 0))
#ifdef WORDS_BIGENDIAN
((art_u32 *)dst)[i] = src_rgba;
#else
((art_u32 *)dst)[i] = src_abgr;
#endif
else
{
int r, g, b, a;
int src_r, src_g, src_b;
int dst_r, dst_g, dst_b;
int tmp;
int c;
#ifdef ART_OPTIMIZE_SPACE
tmp = (255 - src_alpha) * (255 - dst_alpha) + 0x80;
a = 255 - ((tmp + (tmp >> 8)) >> 8);
c = ((src_alpha << 16) + (a >> 1)) / a;
#else
tmp = art_rgba_composite_table[(src_alpha << 8) + dst_alpha];
c = tmp & 0x1ffff;
a = tmp >> 24;
#endif
#ifdef WORDS_BIGENDIAN
src_r = (src_rgba >> 24) & 0xff;
src_g = (src_rgba >> 16) & 0xff;
src_b = (src_rgba >> 8) & 0xff;
dst_r = (dst_rgba >> 24) & 0xff;
dst_g = (dst_rgba >> 16) & 0xff;
dst_b = (dst_rgba >> 8) & 0xff;
#else
src_r = src_abgr & 0xff;
src_g = (src_abgr >> 8) & 0xff;
src_b = (src_abgr >> 16) & 0xff;
dst_r = dst_abgr & 0xff;
dst_g = (dst_abgr >> 8) & 0xff;
dst_b = (dst_abgr >> 16) & 0xff;
#endif
r = dst_r + (((src_r - dst_r) * c + 0x8000) >> 16);
g = dst_g + (((src_g - dst_g) * c + 0x8000) >> 16);
b = dst_b + (((src_b - dst_b) * c + 0x8000) >> 16);
#ifdef WORDS_BIGENDIAN
((art_u32 *)dst)[i] = (r << 24) | (g << 16) | (b << 8) | a;
#else
((art_u32 *)dst)[i] = (a << 24) | (b << 16) | (g << 8) | r;
#endif
}
}
#if 0
/* it's not clear to me this optimization really wins */
else
{
/* skip over run of transparent pixels */
for (; i < n - 1; i++)
{
#ifdef WORDS_BIGENDIAN
src_rgba = ((art_u32 *)src)[i + 1];
if (src_rgba & 0xff)
break;
#else
src_abgr = ((art_u32 *)src)[i + 1];
if (src_abgr & 0xff000000)
break;
#endif
}
}
#endif
}
}
/**
* art_rgba_fill_run: fill an RGBA buffer a solid RGB color.
* @buf: Buffer to fill.
* @r: Red, range 0..255.
* @g: Green, range 0..255.
* @b: Blue, range 0..255.
* @n: Number of RGB triples to fill.
*
* Fills a buffer with @n copies of the (@r, @g, @b) triple, solid
* alpha. Thus, locations @buf (inclusive) through @buf + 4 * @n
* (exclusive) are written.
**/
void
art_rgba_fill_run (art_u8 *buf, art_u8 r, art_u8 g, art_u8 b, int n)
{
int i;
#ifdef WORDS_BIGENDIAN
art_u32 src_rgba;
#else
art_u32 src_abgr;
#endif
#ifdef WORDS_BIGENDIAN
src_rgba = (r << 24) | (g << 16) | (b << 8) | 255;
#else
src_abgr = (255 << 24) | (b << 16) | (g << 8) | r;
#endif
for (i = 0; i < n; i++)
{
#ifdef WORDS_BIGENDIAN
((art_u32 *)buf)[i] = src_rgba;
#else
((art_u32 *)buf)[i] = src_abgr;
#endif
}
}
/**
* art_rgba_run_alpha: Render semitransparent color over RGBA buffer.
* @buf: Buffer for rendering.
* @r: Red, range 0..255.
* @g: Green, range 0..255.
* @b: Blue, range 0..255.
* @alpha: Alpha, range 0..255.
* @n: Number of RGB triples to render.
*
* Renders a sequential run of solid (@r, @g, @b) color over @buf with
* opacity @alpha. Note that the range of @alpha is 0..255, in contrast
* to art_rgb_run_alpha, which has a range of 0..256.
**/
void
art_rgba_run_alpha (art_u8 *buf, art_u8 r, art_u8 g, art_u8 b, int alpha, int n)
{
int i;
#ifdef WORDS_BIGENDIAN
art_u32 src_rgba, dst_rgba;
#else
art_u32 src_abgr, dst_abgr;
#endif
art_u8 dst_alpha;
int a;
int dst_r, dst_g, dst_b;
int tmp;
int c;
#ifdef WORDS_BIGENDIAN
src_rgba = (r << 24) | (g << 16) | (b << 8) | alpha;
#else
src_abgr = (alpha << 24) | (b << 16) | (g << 8) | r;
#endif
for (i = 0; i < n; i++)
{
#ifdef WORDS_BIGENDIAN
dst_rgba = ((art_u32 *)buf)[i];
dst_alpha = dst_rgba & 0xff;
#else
dst_abgr = ((art_u32 *)buf)[i];
dst_alpha = (dst_abgr >> 24) & 0xff;
#endif
if (dst_alpha)
{
#ifdef ART_OPTIMIZE_SPACE
tmp = (255 - alpha) * (255 - dst_alpha) + 0x80;
a = 255 - ((tmp + (tmp >> 8)) >> 8);
c = ((alpha << 16) + (a >> 1)) / a;
#else
tmp = art_rgba_composite_table[(alpha << 8) + dst_alpha];
c = tmp & 0x1ffff;
a = tmp >> 24;
#endif
#ifdef WORDS_BIGENDIAN
dst_r = (dst_rgba >> 24) & 0xff;
dst_g = (dst_rgba >> 16) & 0xff;
dst_b = (dst_rgba >> 8) & 0xff;
#else
dst_r = dst_abgr & 0xff;
dst_g = (dst_abgr >> 8) & 0xff;
dst_b = (dst_abgr >> 16) & 0xff;
#endif
dst_r += (((r - dst_r) * c + 0x8000) >> 16);
dst_g += (((g - dst_g) * c + 0x8000) >> 16);
dst_b += (((b - dst_b) * c + 0x8000) >> 16);
#ifdef WORDS_BIGENDIAN
((art_u32 *)buf)[i] = (dst_r << 24) | (dst_g << 16) | (dst_b << 8) | a;
#else
((art_u32 *)buf)[i] = (a << 24) | (dst_b << 16) | (dst_g << 8) | dst_r;
#endif
}
else
{
#ifdef WORDS_BIGENDIAN
((art_u32 *)buf)[i] = src_rgba;
#else
((art_u32 *)buf)[i] = src_abgr;
#endif
}
}
}

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/*
* art_rgba.h: Functions for manipulating RGBA pixel data.
*
* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_RGBA_H__
#define __ART_RGBA_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
void
art_rgba_rgba_composite (art_u8 *dst, const art_u8 *src, int n);
void
art_rgba_fill_run (art_u8 *buf, art_u8 r, art_u8 g, art_u8 b, int n);
void
art_rgba_run_alpha (art_u8 *buf, art_u8 r, art_u8 g, art_u8 b, int alpha, int n);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Basic constructors and operations for sorted vector paths */
#include "art_misc.h"
#include "art_rect.h"
#include "art_svp.h"
/* Add a new segment. The arguments can be zero and NULL if the caller
would rather fill them in later.
We also realloc one auxiliary array of ints of size n_segs if
desired.
*/
/**
* art_svp_add_segment: Add a segment to an #ArtSVP structure.
* @p_vp: Pointer to where the #ArtSVP structure is stored.
* @pn_segs_max: Pointer to the allocated size of *@p_vp.
* @pn_points_max: Pointer to where auxiliary array is stored.
* @n_points: Number of points for new segment.
* @dir: Direction for new segment; 0 is up, 1 is down.
* @points: Points for new segment.
* @bbox: Bounding box for new segment.
*
* Adds a new segment to an ArtSVP structure. This routine reallocates
* the structure if necessary, updating *@p_vp and *@pn_segs_max as
* necessary.
*
* The new segment is simply added after all other segments. Thus,
* this routine should be called in order consistent with the #ArtSVP
* sorting rules.
*
* If the @bbox argument is given, it is simply stored in the new
* segment. Otherwise (if it is NULL), the bounding box is computed
* from the @points given.
**/
int
art_svp_add_segment (ArtSVP **p_vp, int *pn_segs_max,
int **pn_points_max,
int n_points, int dir, ArtPoint *points,
ArtDRect *bbox)
{
int seg_num;
ArtSVP *svp;
ArtSVPSeg *seg;
svp = *p_vp;
seg_num = svp->n_segs++;
if (*pn_segs_max == seg_num)
{
*pn_segs_max <<= 1;
svp = (ArtSVP *)art_realloc (svp, sizeof(ArtSVP) +
(*pn_segs_max - 1) * sizeof(ArtSVPSeg));
*p_vp = svp;
if (pn_points_max != NULL)
*pn_points_max = art_renew (*pn_points_max, int, *pn_segs_max);
}
seg = &svp->segs[seg_num];
seg->n_points = n_points;
seg->dir = dir;
seg->points = points;
if (bbox)
seg->bbox = *bbox;
else if (points)
{
double x_min, x_max;
int i;
x_min = x_max = points[0].x;
for (i = 1; i < n_points; i++)
{
if (x_min > points[i].x)
x_min = points[i].x;
if (x_max < points[i].x)
x_max = points[i].x;
}
seg->bbox.x0 = x_min;
seg->bbox.y0 = points[0].y;
seg->bbox.x1 = x_max;
seg->bbox.y1 = points[n_points - 1].y;
}
return seg_num;
}
/**
* art_svp_free: Free an #ArtSVP structure.
* @svp: #ArtSVP to free.
*
* Frees an #ArtSVP structure and all the segments in it.
**/
void
art_svp_free (ArtSVP *svp)
{
int n_segs = svp->n_segs;
int i;
for (i = 0; i < n_segs; i++)
art_free (svp->segs[i].points);
art_free (svp);
}
#ifdef ART_USE_NEW_INTERSECTOR
#define EPSILON 0
#else
#define EPSILON 1e-6
#endif
/**
* art_svp_seg_compare: Compare two segments of an svp.
* @seg1: First segment to compare.
* @seg2: Second segment to compare.
*
* Compares two segments of an svp. Return 1 if @seg2 is below or to the
* right of @seg1, -1 otherwise.
**/
int
art_svp_seg_compare (const void *s1, const void *s2)
{
const ArtSVPSeg *seg1 = s1;
const ArtSVPSeg *seg2 = s2;
if (seg1->points[0].y - EPSILON > seg2->points[0].y) return 1;
else if (seg1->points[0].y + EPSILON < seg2->points[0].y) return -1;
else if (seg1->points[0].x - EPSILON > seg2->points[0].x) return 1;
else if (seg1->points[0].x + EPSILON < seg2->points[0].x) return -1;
else if ((seg1->points[1].x - seg1->points[0].x) *
(seg2->points[1].y - seg2->points[0].y) -
(seg1->points[1].y - seg1->points[0].y) *
(seg2->points[1].x - seg2->points[0].x) > 0) return 1;
else return -1;
}

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_SVP_H__
#define __ART_SVP_H__
/* Basic data structures and constructors for sorted vector paths */
#ifdef LIBART_COMPILATION
#include "art_rect.h"
#include "art_point.h"
#else
#include <libart_lgpl/art_rect.h>
#include <libart_lgpl/art_point.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef struct _ArtSVP ArtSVP;
typedef struct _ArtSVPSeg ArtSVPSeg;
struct _ArtSVPSeg {
int n_points;
int dir; /* == 0 for "up", 1 for "down" */
ArtDRect bbox;
ArtPoint *points;
};
struct _ArtSVP {
int n_segs;
ArtSVPSeg segs[1];
};
int
art_svp_add_segment (ArtSVP **p_vp, int *pn_segs_max,
int **pn_points_max,
int n_points, int dir, ArtPoint *points,
ArtDRect *bbox);
void
art_svp_free (ArtSVP *svp);
int
art_svp_seg_compare (const void *s1, const void *s2);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_SVP_H__ */

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other-licenses/libart_lgpl/art_svp_intersect.c Normal file
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other-licenses/libart_lgpl/art_svp_intersect.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 2001 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_SVP_INTERSECT_H__
#define __ART_SVP_INTERSECT_H__
/* The funky new SVP intersector. */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#ifndef ART_WIND_RULE_DEFINED
#define ART_WIND_RULE_DEFINED
typedef enum {
ART_WIND_RULE_NONZERO,
ART_WIND_RULE_INTERSECT,
ART_WIND_RULE_ODDEVEN,
ART_WIND_RULE_POSITIVE
} ArtWindRule;
#endif
typedef struct _ArtSvpWriter ArtSvpWriter;
struct _ArtSvpWriter {
int (*add_segment) (ArtSvpWriter *self, int wind_left, int delta_wind,
double x, double y);
void (*add_point) (ArtSvpWriter *self, int seg_id, double x, double y);
void (*close_segment) (ArtSvpWriter *self, int seg_id);
};
ArtSvpWriter *
art_svp_writer_rewind_new (ArtWindRule rule);
ArtSVP *
art_svp_writer_rewind_reap (ArtSvpWriter *self);
int
art_svp_seg_compare (const void *s1, const void *s2);
void
art_svp_intersector (const ArtSVP *in, ArtSvpWriter *out);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_SVP_INTERSECT_H__ */

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998-2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#define noVERBOSE
/* Vector path set operations, over sorted vpaths. */
#include "art_misc.h"
#include "art_svp.h"
#include "art_vpath.h"
#include "art_svp_vpath.h"
#include "art_svp.h"
#ifdef ART_USE_NEW_INTERSECTOR
#include "art_svp_intersect.h"
#else
#include "art_svp_wind.h"
#endif
#include "art_svp_ops.h"
#include "art_vpath_svp.h"
/* Merge the segments of the two svp's. The resulting svp will share
segments with args passed in, so be super-careful with the
allocation. */
/**
* art_svp_merge: Merge the segments of two svp's.
* @svp1: One svp to merge.
* @svp2: The other svp to merge.
*
* Merges the segments of two SVP's into a new one. The resulting
* #ArtSVP data structure will share the segments of the argument
* svp's, so it is probably a good idea to free it shallowly,
* especially if the arguments will be freed with art_svp_free().
*
* Return value: The merged #ArtSVP.
**/
static ArtSVP *
art_svp_merge (const ArtSVP *svp1, const ArtSVP *svp2)
{
ArtSVP *svp_new;
int ix;
int ix1, ix2;
svp_new = (ArtSVP *)art_alloc (sizeof(ArtSVP) +
(svp1->n_segs + svp2->n_segs - 1) *
sizeof(ArtSVPSeg));
ix1 = 0;
ix2 = 0;
for (ix = 0; ix < svp1->n_segs + svp2->n_segs; ix++)
{
if (ix1 < svp1->n_segs &&
(ix2 == svp2->n_segs ||
art_svp_seg_compare (&svp1->segs[ix1], &svp2->segs[ix2]) < 1))
svp_new->segs[ix] = svp1->segs[ix1++];
else
svp_new->segs[ix] = svp2->segs[ix2++];
}
svp_new->n_segs = ix;
return svp_new;
}
#ifdef VERBOSE
#define XOFF 50
#define YOFF 700
static void
print_ps_vpath (ArtVpath *vpath)
{
int i;
for (i = 0; vpath[i].code != ART_END; i++)
{
switch (vpath[i].code)
{
case ART_MOVETO:
printf ("%g %g moveto\n", XOFF + vpath[i].x, YOFF - vpath[i].y);
break;
case ART_LINETO:
printf ("%g %g lineto\n", XOFF + vpath[i].x, YOFF - vpath[i].y);
break;
default:
break;
}
}
printf ("stroke showpage\n");
}
#define DELT 4
static void
print_ps_svp (ArtSVP *vpath)
{
int i, j;
printf ("%% begin\n");
for (i = 0; i < vpath->n_segs; i++)
{
printf ("%g setgray\n", vpath->segs[i].dir ? 0.7 : 0);
for (j = 0; j < vpath->segs[i].n_points; j++)
{
printf ("%g %g %s\n",
XOFF + vpath->segs[i].points[j].x,
YOFF - vpath->segs[i].points[j].y,
j ? "lineto" : "moveto");
}
printf ("%g %g moveto %g %g lineto %g %g lineto %g %g lineto stroke\n",
XOFF + vpath->segs[i].points[0].x - DELT,
YOFF - DELT - vpath->segs[i].points[0].y,
XOFF + vpath->segs[i].points[0].x - DELT,
YOFF - vpath->segs[i].points[0].y,
XOFF + vpath->segs[i].points[0].x + DELT,
YOFF - vpath->segs[i].points[0].y,
XOFF + vpath->segs[i].points[0].x + DELT,
YOFF - DELT - vpath->segs[i].points[0].y);
printf ("%g %g moveto %g %g lineto %g %g lineto %g %g lineto stroke\n",
XOFF + vpath->segs[i].points[j - 1].x - DELT,
YOFF + DELT - vpath->segs[i].points[j - 1].y,
XOFF + vpath->segs[i].points[j - 1].x - DELT,
YOFF - vpath->segs[i].points[j - 1].y,
XOFF + vpath->segs[i].points[j - 1].x + DELT,
YOFF - vpath->segs[i].points[j - 1].y,
XOFF + vpath->segs[i].points[j - 1].x + DELT,
YOFF + DELT - vpath->segs[i].points[j - 1].y);
printf ("stroke\n");
}
printf ("showpage\n");
}
#endif
#ifndef ART_USE_NEW_INTERSECTOR
static ArtSVP *
art_svp_merge_perturbed (const ArtSVP *svp1, const ArtSVP *svp2)
{
ArtVpath *vpath1, *vpath2;
ArtVpath *vpath1_p, *vpath2_p;
ArtSVP *svp1_p, *svp2_p;
ArtSVP *svp_new;
vpath1 = art_vpath_from_svp (svp1);
vpath1_p = art_vpath_perturb (vpath1);
art_free (vpath1);
svp1_p = art_svp_from_vpath (vpath1_p);
art_free (vpath1_p);
vpath2 = art_vpath_from_svp (svp2);
vpath2_p = art_vpath_perturb (vpath2);
art_free (vpath2);
svp2_p = art_svp_from_vpath (vpath2_p);
art_free (vpath2_p);
svp_new = art_svp_merge (svp1_p, svp2_p);
#ifdef VERBOSE
print_ps_svp (svp1_p);
print_ps_svp (svp2_p);
print_ps_svp (svp_new);
#endif
art_free (svp1_p);
art_free (svp2_p);
return svp_new;
}
#endif
/* Compute the union of two vector paths.
Status of this routine:
Basic correctness: Seems to work.
Numerical stability: We cheat (adding random perturbation). Thus,
it seems very likely that no numerical stability problems will be
seen in practice.
Speed: Would be better if we didn't go to unsorted vector path
and back to add the perturbation.
Precision: The perturbation fuzzes the coordinates slightly. In
cases of butting segments, razor thin long holes may appear.
*/
/**
* art_svp_union: Compute the union of two sorted vector paths.
* @svp1: One sorted vector path.
* @svp2: The other sorted vector path.
*
* Computes the union of the two argument svp's. Given two svp's with
* winding numbers of 0 and 1 everywhere, the resulting winding number
* will be 1 where either (or both) of the argument svp's has a
* winding number 1, 0 otherwise. The result is newly allocated.
*
* Currently, this routine has accuracy problems pending the
* implementation of the new intersector.
*
* Return value: The union of @svp1 and @svp2.
**/
ArtSVP *
art_svp_union (const ArtSVP *svp1, const ArtSVP *svp2)
{
#ifdef ART_USE_NEW_INTERSECTOR
ArtSVP *svp3, *svp_new;
ArtSvpWriter *swr;
svp3 = art_svp_merge (svp1, svp2);
swr = art_svp_writer_rewind_new (ART_WIND_RULE_POSITIVE);
art_svp_intersector (svp3, swr);
svp_new = art_svp_writer_rewind_reap (swr);
art_free (svp3); /* shallow free because svp3 contains shared segments */
return svp_new;
#else
ArtSVP *svp3, *svp4, *svp_new;
svp3 = art_svp_merge_perturbed (svp1, svp2);
svp4 = art_svp_uncross (svp3);
art_svp_free (svp3);
svp_new = art_svp_rewind_uncrossed (svp4, ART_WIND_RULE_POSITIVE);
#ifdef VERBOSE
print_ps_svp (svp4);
print_ps_svp (svp_new);
#endif
art_svp_free (svp4);
return svp_new;
#endif
}
/* Compute the intersection of two vector paths.
Status of this routine:
Basic correctness: Seems to work.
Numerical stability: We cheat (adding random perturbation). Thus,
it seems very likely that no numerical stability problems will be
seen in practice.
Speed: Would be better if we didn't go to unsorted vector path
and back to add the perturbation.
Precision: The perturbation fuzzes the coordinates slightly. In
cases of butting segments, razor thin long isolated segments may
appear.
*/
/**
* art_svp_intersect: Compute the intersection of two sorted vector paths.
* @svp1: One sorted vector path.
* @svp2: The other sorted vector path.
*
* Computes the intersection of the two argument svp's. Given two
* svp's with winding numbers of 0 and 1 everywhere, the resulting
* winding number will be 1 where both of the argument svp's has a
* winding number 1, 0 otherwise. The result is newly allocated.
*
* Currently, this routine has accuracy problems pending the
* implementation of the new intersector.
*
* Return value: The intersection of @svp1 and @svp2.
**/
ArtSVP *
art_svp_intersect (const ArtSVP *svp1, const ArtSVP *svp2)
{
#ifdef ART_USE_NEW_INTERSECTOR
ArtSVP *svp3, *svp_new;
ArtSvpWriter *swr;
svp3 = art_svp_merge (svp1, svp2);
swr = art_svp_writer_rewind_new (ART_WIND_RULE_INTERSECT);
art_svp_intersector (svp3, swr);
svp_new = art_svp_writer_rewind_reap (swr);
art_free (svp3); /* shallow free because svp3 contains shared segments */
return svp_new;
#else
ArtSVP *svp3, *svp4, *svp_new;
svp3 = art_svp_merge_perturbed (svp1, svp2);
svp4 = art_svp_uncross (svp3);
art_svp_free (svp3);
svp_new = art_svp_rewind_uncrossed (svp4, ART_WIND_RULE_INTERSECT);
art_svp_free (svp4);
return svp_new;
#endif
}
/* Compute the symmetric difference of two vector paths.
Status of this routine:
Basic correctness: Seems to work.
Numerical stability: We cheat (adding random perturbation). Thus,
it seems very likely that no numerical stability problems will be
seen in practice.
Speed: We could do a lot better by scanning through the svp
representations and culling out any segments that are exactly
identical. It would also be better if we didn't go to unsorted
vector path and back to add the perturbation.
Precision: Awful. In the case of inputs which are similar (the
common case for canvas display), the entire outline is "hairy." In
addition, the perturbation fuzzes the coordinates slightly. It can
be used as a conservative approximation.
*/
/**
* art_svp_diff: Compute the symmetric difference of two sorted vector paths.
* @svp1: One sorted vector path.
* @svp2: The other sorted vector path.
*
* Computes the symmetric of the two argument svp's. Given two svp's
* with winding numbers of 0 and 1 everywhere, the resulting winding
* number will be 1 where either, but not both, of the argument svp's
* has a winding number 1, 0 otherwise. The result is newly allocated.
*
* Currently, this routine has accuracy problems pending the
* implementation of the new intersector.
*
* Return value: The symmetric difference of @svp1 and @svp2.
**/
ArtSVP *
art_svp_diff (const ArtSVP *svp1, const ArtSVP *svp2)
{
#ifdef ART_USE_NEW_INTERSECTOR
ArtSVP *svp3, *svp_new;
ArtSvpWriter *swr;
svp3 = art_svp_merge (svp1, svp2);
swr = art_svp_writer_rewind_new (ART_WIND_RULE_ODDEVEN);
art_svp_intersector (svp3, swr);
svp_new = art_svp_writer_rewind_reap (swr);
art_free (svp3); /* shallow free because svp3 contains shared segments */
return svp_new;
#else
ArtSVP *svp3, *svp4, *svp_new;
svp3 = art_svp_merge_perturbed (svp1, svp2);
svp4 = art_svp_uncross (svp3);
art_svp_free (svp3);
svp_new = art_svp_rewind_uncrossed (svp4, ART_WIND_RULE_ODDEVEN);
art_svp_free (svp4);
return svp_new;
#endif
}
/* todo: implement minus */

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_SVP_OPS_H__
#define __ART_SVP_OPS_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* Vector path set operations, over sorted vpaths. */
ArtSVP *art_svp_union (const ArtSVP *svp1, const ArtSVP *svp2);
ArtSVP *art_svp_intersect (const ArtSVP *svp1, const ArtSVP *svp2);
ArtSVP *art_svp_diff (const ArtSVP *svp1, const ArtSVP *svp2);
ArtSVP *art_svp_minus (const ArtSVP *svp1, const ArtSVP *svp2);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_SVP_OPS_H__ */

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1999 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <math.h>
#include "art_misc.h"
#include "art_svp.h"
#include "art_svp_point.h"
/* Determine whether a point is inside, or near, an svp. */
/* return winding number of point wrt svp */
/**
* art_svp_point_wind: Determine winding number of a point with respect to svp.
* @svp: The svp.
* @x: The X coordinate of the point.
* @y: The Y coordinate of the point.
*
* Determine the winding number of the point @x, @y with respect to @svp.
*
* Return value: the winding number.
**/
int
art_svp_point_wind (ArtSVP *svp, double x, double y)
{
int i, j;
int wind = 0;
for (i = 0; i < svp->n_segs; i++)
{
ArtSVPSeg *seg = &svp->segs[i];
if (seg->bbox.y0 > y)
break;
if (seg->bbox.y1 > y)
{
if (seg->bbox.x1 < x)
wind += seg->dir ? 1 : -1;
else if (seg->bbox.x0 <= x)
{
double x0, y0, x1, y1, dx, dy;
for (j = 0; j < seg->n_points - 1; j++)
{
if (seg->points[j + 1].y > y)
break;
}
x0 = seg->points[j].x;
y0 = seg->points[j].y;
x1 = seg->points[j + 1].x;
y1 = seg->points[j + 1].y;
dx = x1 - x0;
dy = y1 - y0;
if ((x - x0) * dy > (y - y0) * dx)
wind += seg->dir ? 1 : -1;
}
}
}
return wind;
}
/**
* art_svp_point_dist: Determine distance between point and svp.
* @svp: The svp.
* @x: The X coordinate of the point.
* @y: The Y coordinate of the point.
*
* Determines the distance of the point @x, @y to the closest edge in
* @svp. A large number is returned if @svp is empty.
*
* Return value: the distance.
**/
double
art_svp_point_dist (ArtSVP *svp, double x, double y)
{
int i, j;
double dist_sq;
double best_sq = -1;
for (i = 0; i < svp->n_segs; i++)
{
ArtSVPSeg *seg = &svp->segs[i];
for (j = 0; j < seg->n_points - 1; j++)
{
double x0 = seg->points[j].x;
double y0 = seg->points[j].y;
double x1 = seg->points[j + 1].x;
double y1 = seg->points[j + 1].y;
double dx = x1 - x0;
double dy = y1 - y0;
double dxx0 = x - x0;
double dyy0 = y - y0;
double dot = dxx0 * dx + dyy0 * dy;
if (dot < 0)
dist_sq = dxx0 * dxx0 + dyy0 * dyy0;
else
{
double rr = dx * dx + dy * dy;
if (dot > rr)
dist_sq = (x - x1) * (x - x1) + (y - y1) * (y - y1);
else
{
double perp = (y - y0) * dx - (x - x0) * dy;
dist_sq = perp * perp / rr;
}
}
if (best_sq < 0 || dist_sq < best_sq)
best_sq = dist_sq;
}
}
if (best_sq >= 0)
return sqrt (best_sq);
else
return 1e12;
}

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1999 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_SVP_POINT_H__
#define __ART_SVP_POINT_H__
/* Determine whether a point is inside, or near, an svp. */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
int
art_svp_point_wind (ArtSVP *svp, double x, double y);
double
art_svp_point_dist (ArtSVP *svp, double x, double y);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_SVP_H__ */

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998-2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* The spiffy antialiased renderer for sorted vector paths. */
#include <math.h>
#include <string.h> /* for memmove */
#include "art_misc.h"
#include "art_rect.h"
#include "art_svp.h"
#include "art_svp_render_aa.h"
#include "stdio.h"
typedef double artfloat;
struct _ArtSVPRenderAAIter {
const ArtSVP *svp;
int x0, x1;
int y;
int seg_ix;
int *active_segs;
int n_active_segs;
int *cursor;
artfloat *seg_x;
artfloat *seg_dx;
ArtSVPRenderAAStep *steps;
};
static void
art_svp_render_insert_active (int i, int *active_segs, int n_active_segs,
artfloat *seg_x, artfloat *seg_dx)
{
int j;
artfloat x;
int tmp1, tmp2;
/* this is a cheap hack to get ^'s sorted correctly */
x = seg_x[i] + 0.001 * seg_dx[i];
for (j = 0; j < n_active_segs && seg_x[active_segs[j]] < x; j++);
tmp1 = i;
while (j < n_active_segs)
{
tmp2 = active_segs[j];
active_segs[j] = tmp1;
tmp1 = tmp2;
j++;
}
active_segs[j] = tmp1;
}
static void
art_svp_render_delete_active (int *active_segs, int j, int n_active_segs)
{
int k;
for (k = j; k < n_active_segs; k++)
active_segs[k] = active_segs[k + 1];
}
#define EPSILON 1e-6
/* Render the sorted vector path in the given rectangle, antialiased.
This interface uses a callback for the actual pixel rendering. The
callback is called y1 - y0 times (once for each scan line). The y
coordinate is given as an argument for convenience (it could be
stored in the callback's private data and incremented on each
call).
The rendered polygon is represented in a semi-runlength format: a
start value and a sequence of "steps". Each step has an x
coordinate and a value delta. The resulting value at position x is
equal to the sum of the start value and all step delta values for
which the step x coordinate is less than or equal to x. An
efficient algorithm will traverse the steps left to right, keeping
a running sum.
All x coordinates in the steps are guaranteed to be x0 <= x < x1.
(This guarantee is a change from the gfonted vpaar renderer, and is
designed to simplify the callback).
There is now a further guarantee that no two steps will have the
same x value. This may allow for further speedup and simplification
of renderers.
The value 0x8000 represents 0% coverage by the polygon, while
0xff8000 represents 100% coverage. This format is designed so that
>> 16 results in a standard 0x00..0xff value range, with nice
rounding.
Status of this routine:
Basic correctness: OK
Numerical stability: pretty good, although probably not
bulletproof.
Speed: Needs more aggressive culling of bounding boxes. Can
probably speed up the [x0,x1) clipping of step values. Can do more
of the step calculation in fixed point.
Precision: No known problems, although it should be tested
thoroughly, especially for symmetry.
*/
ArtSVPRenderAAIter *
art_svp_render_aa_iter (const ArtSVP *svp,
int x0, int y0, int x1, int y1)
{
ArtSVPRenderAAIter *iter = art_new (ArtSVPRenderAAIter, 1);
iter->svp = svp;
iter->y = y0;
iter->x0 = x0;
iter->x1 = x1;
iter->seg_ix = 0;
iter->active_segs = art_new (int, svp->n_segs);
iter->cursor = art_new (int, svp->n_segs);
iter->seg_x = art_new (artfloat, svp->n_segs);
iter->seg_dx = art_new (artfloat, svp->n_segs);
iter->steps = art_new (ArtSVPRenderAAStep, x1 - x0);
iter->n_active_segs = 0;
return iter;
}
#define ADD_STEP(xpos, xdelta) \
/* stereotype code fragment for adding a step */ \
if (n_steps == 0 || steps[n_steps - 1].x < xpos) \
{ \
sx = n_steps; \
steps[sx].x = xpos; \
steps[sx].delta = xdelta; \
n_steps++; \
} \
else \
{ \
for (sx = n_steps; sx > 0; sx--) \
{ \
if (steps[sx - 1].x == xpos) \
{ \
steps[sx - 1].delta += xdelta; \
sx = n_steps; \
break; \
} \
else if (steps[sx - 1].x < xpos) \
{ \
break; \
} \
} \
if (sx < n_steps) \
{ \
memmove (&steps[sx + 1], &steps[sx], \
(n_steps - sx) * sizeof(steps[0])); \
steps[sx].x = xpos; \
steps[sx].delta = xdelta; \
n_steps++; \
} \
}
void
art_svp_render_aa_iter_step (ArtSVPRenderAAIter *iter, int *p_start,
ArtSVPRenderAAStep **p_steps, int *p_n_steps)
{
const ArtSVP *svp = iter->svp;
int *active_segs = iter->active_segs;
int n_active_segs = iter->n_active_segs;
int *cursor = iter->cursor;
artfloat *seg_x = iter->seg_x;
artfloat *seg_dx = iter->seg_dx;
int i = iter->seg_ix;
int j;
int x0 = iter->x0;
int x1 = iter->x1;
int y = iter->y;
int seg_index;
int x;
ArtSVPRenderAAStep *steps = iter->steps;
int n_steps;
artfloat y_top, y_bot;
artfloat x_top, x_bot;
artfloat x_min, x_max;
int ix_min, ix_max;
artfloat delta; /* delta should be int too? */
int last, this;
int xdelta;
artfloat rslope, drslope;
int start;
const ArtSVPSeg *seg;
int curs;
artfloat dy;
int sx;
/* insert new active segments */
for (; i < svp->n_segs && svp->segs[i].bbox.y0 < y + 1; i++)
{
if (svp->segs[i].bbox.y1 > y &&
svp->segs[i].bbox.x0 < x1)
{
seg = &svp->segs[i];
/* move cursor to topmost vector which overlaps [y,y+1) */
for (curs = 0; seg->points[curs + 1].y < y; curs++);
cursor[i] = curs;
dy = seg->points[curs + 1].y - seg->points[curs].y;
if (fabs (dy) >= EPSILON)
seg_dx[i] = (seg->points[curs + 1].x - seg->points[curs].x) /
dy;
else
seg_dx[i] = 1e12;
seg_x[i] = seg->points[curs].x +
(y - seg->points[curs].y) * seg_dx[i];
art_svp_render_insert_active (i, active_segs, n_active_segs++,
seg_x, seg_dx);
}
}
n_steps = 0;
/* render the runlengths, advancing and deleting as we go */
start = 0x8000;
for (j = 0; j < n_active_segs; j++)
{
seg_index = active_segs[j];
seg = &svp->segs[seg_index];
curs = cursor[seg_index];
while (curs != seg->n_points - 1 &&
seg->points[curs].y < y + 1)
{
y_top = y;
if (y_top < seg->points[curs].y)
y_top = seg->points[curs].y;
y_bot = y + 1;
if (y_bot > seg->points[curs + 1].y)
y_bot = seg->points[curs + 1].y;
if (y_top != y_bot) {
delta = (seg->dir ? 16711680.0 : -16711680.0) *
(y_bot - y_top);
x_top = seg_x[seg_index] + (y_top - y) * seg_dx[seg_index];
x_bot = seg_x[seg_index] + (y_bot - y) * seg_dx[seg_index];
if (x_top < x_bot)
{
x_min = x_top;
x_max = x_bot;
}
else
{
x_min = x_bot;
x_max = x_top;
}
ix_min = floor (x_min);
ix_max = floor (x_max);
if (ix_min >= x1)
{
/* skip; it starts to the right of the render region */
}
else if (ix_max < x0)
/* it ends to the left of the render region */
start += delta;
else if (ix_min == ix_max)
{
/* case 1, antialias a single pixel */
xdelta = (ix_min + 1 - (x_min + x_max) * 0.5) * delta;
ADD_STEP(ix_min, xdelta)
if (ix_min + 1 < x1)
{
xdelta = delta - xdelta;
ADD_STEP(ix_min + 1, xdelta)
}
}
else
{
/* case 2, antialias a run */
rslope = 1.0 / fabs (seg_dx[seg_index]);
drslope = delta * rslope;
last =
drslope * 0.5 *
(ix_min + 1 - x_min) * (ix_min + 1 - x_min);
xdelta = last;
if (ix_min >= x0)
{
ADD_STEP(ix_min, xdelta)
x = ix_min + 1;
}
else
{
start += last;
x = x0;
}
if (ix_max > x1)
ix_max = x1;
for (; x < ix_max; x++)
{
this = (seg->dir ? 16711680.0 : -16711680.0) * rslope *
(x + 0.5 - x_min);
xdelta = this - last;
last = this;
ADD_STEP(x, xdelta)
}
if (x < x1)
{
this =
delta * (1 - 0.5 *
(x_max - ix_max) * (x_max - ix_max) *
rslope);
xdelta = this - last;
last = this;
ADD_STEP(x, xdelta)
if (x + 1 < x1)
{
xdelta = delta - last;
ADD_STEP(x + 1, xdelta)
}
}
}
}
curs++;
if (curs != seg->n_points - 1 &&
seg->points[curs].y < y + 1)
{
dy = seg->points[curs + 1].y - seg->points[curs].y;
if (fabs (dy) >= EPSILON)
seg_dx[seg_index] = (seg->points[curs + 1].x -
seg->points[curs].x) / dy;
else
seg_dx[seg_index] = 1e12;
seg_x[seg_index] = seg->points[curs].x +
(y - seg->points[curs].y) * seg_dx[seg_index];
}
/* break here, instead of duplicating predicate in while? */
}
if (seg->points[curs].y >= y + 1)
{
curs--;
cursor[seg_index] = curs;
seg_x[seg_index] += seg_dx[seg_index];
}
else
{
art_svp_render_delete_active (active_segs, j--,
--n_active_segs);
}
}
*p_start = start;
*p_steps = steps;
*p_n_steps = n_steps;
iter->seg_ix = i;
iter->n_active_segs = n_active_segs;
iter->y++;
}
void
art_svp_render_aa_iter_done (ArtSVPRenderAAIter *iter)
{
art_free (iter->steps);
art_free (iter->seg_dx);
art_free (iter->seg_x);
art_free (iter->cursor);
art_free (iter->active_segs);
art_free (iter);
}
/**
* art_svp_render_aa: Render SVP antialiased.
* @svp: The #ArtSVP to render.
* @x0: Left coordinate of destination rectangle.
* @y0: Top coordinate of destination rectangle.
* @x1: Right coordinate of destination rectangle.
* @y1: Bottom coordinate of destination rectangle.
* @callback: The callback which actually paints the pixels.
* @callback_data: Private data for @callback.
*
* Renders the sorted vector path in the given rectangle, antialiased.
*
* This interface uses a callback for the actual pixel rendering. The
* callback is called @y1 - @y0 times (once for each scan line). The y
* coordinate is given as an argument for convenience (it could be
* stored in the callback's private data and incremented on each
* call).
*
* The rendered polygon is represented in a semi-runlength format: a
* start value and a sequence of "steps". Each step has an x
* coordinate and a value delta. The resulting value at position x is
* equal to the sum of the start value and all step delta values for
* which the step x coordinate is less than or equal to x. An
* efficient algorithm will traverse the steps left to right, keeping
* a running sum.
*
* All x coordinates in the steps are guaranteed to be @x0 <= x < @x1.
* (This guarantee is a change from the gfonted vpaar renderer from
* which this routine is derived, and is designed to simplify the
* callback).
*
* The value 0x8000 represents 0% coverage by the polygon, while
* 0xff8000 represents 100% coverage. This format is designed so that
* >> 16 results in a standard 0x00..0xff value range, with nice
* rounding.
*
**/
void
art_svp_render_aa (const ArtSVP *svp,
int x0, int y0, int x1, int y1,
void (*callback) (void *callback_data,
int y,
int start,
ArtSVPRenderAAStep *steps, int n_steps),
void *callback_data)
{
ArtSVPRenderAAIter *iter;
int y;
int start;
ArtSVPRenderAAStep *steps;
int n_steps;
iter = art_svp_render_aa_iter (svp, x0, y0, x1, y1);
for (y = y0; y < y1; y++)
{
art_svp_render_aa_iter_step (iter, &start, &steps, &n_steps);
(*callback) (callback_data, y, start, steps, n_steps);
}
art_svp_render_aa_iter_done (iter);
}

61
other-licenses/libart_lgpl/art_svp_render_aa.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_SVP_RENDER_AA_H__
#define __ART_SVP_RENDER_AA_H__
/* The spiffy antialiased renderer for sorted vector paths. */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef struct _ArtSVPRenderAAStep ArtSVPRenderAAStep;
typedef struct _ArtSVPRenderAAIter ArtSVPRenderAAIter;
struct _ArtSVPRenderAAStep {
int x;
int delta; /* stored with 16 fractional bits */
};
ArtSVPRenderAAIter *
art_svp_render_aa_iter (const ArtSVP *svp,
int x0, int y0, int x1, int y1);
void
art_svp_render_aa_iter_step (ArtSVPRenderAAIter *iter, int *p_start,
ArtSVPRenderAAStep **p_steps, int *p_n_steps);
void
art_svp_render_aa_iter_done (ArtSVPRenderAAIter *iter);
void
art_svp_render_aa (const ArtSVP *svp,
int x0, int y0, int x1, int y1,
void (*callback) (void *callback_data,
int y,
int start,
ArtSVPRenderAAStep *steps, int n_steps),
void *callback_data);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_SVP_RENDER_AA_H__ */

213
other-licenses/libart_lgpl/art_svp_vpath.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998-2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Sort vector paths into sorted vector paths */
#include <stdlib.h>
#include <math.h>
#include "art_misc.h"
#include "art_vpath.h"
#include "art_svp.h"
#include "art_svp_vpath.h"
/* reverse a list of points in place */
static void
reverse_points (ArtPoint *points, int n_points)
{
int i;
ArtPoint tmp_p;
for (i = 0; i < (n_points >> 1); i++)
{
tmp_p = points[i];
points[i] = points[n_points - (i + 1)];
points[n_points - (i + 1)] = tmp_p;
}
}
/**
* art_svp_from_vpath: Convert a vpath to a sorted vector path.
* @vpath: #ArtVPath to convert.
*
* Converts a vector path into sorted vector path form. The svp form is
* more efficient for rendering and other vector operations.
*
* Basically, the implementation is to traverse the vector path,
* generating a new segment for each "run" of points in the vector
* path with monotonically increasing Y values. All the resulting
* values are then sorted.
*
* Note: I'm not sure that the sorting rule is correct with respect
* to numerical stability issues.
*
* Return value: Resulting sorted vector path.
**/
ArtSVP *
art_svp_from_vpath (ArtVpath *vpath)
{
int n_segs, n_segs_max;
ArtSVP *svp;
int dir;
int new_dir;
int i;
ArtPoint *points;
int n_points, n_points_max;
double x, y;
double x_min, x_max;
n_segs = 0;
n_segs_max = 16;
svp = (ArtSVP *)art_alloc (sizeof(ArtSVP) +
(n_segs_max - 1) * sizeof(ArtSVPSeg));
dir = 0;
n_points = 0;
n_points_max = 0;
points = NULL;
i = 0;
x = y = 0; /* unnecessary, given "first code must not be LINETO" invariant,
but it makes gcc -Wall -ansi -pedantic happier */
x_min = x_max = 0; /* same */
while (vpath[i].code != ART_END) {
if (vpath[i].code == ART_MOVETO || vpath[i].code == ART_MOVETO_OPEN)
{
if (points != NULL && n_points >= 2)
{
if (n_segs == n_segs_max)
{
n_segs_max <<= 1;
svp = (ArtSVP *)art_realloc (svp, sizeof(ArtSVP) +
(n_segs_max - 1) *
sizeof(ArtSVPSeg));
}
svp->segs[n_segs].n_points = n_points;
svp->segs[n_segs].dir = (dir > 0);
if (dir < 0)
reverse_points (points, n_points);
svp->segs[n_segs].points = points;
svp->segs[n_segs].bbox.x0 = x_min;
svp->segs[n_segs].bbox.x1 = x_max;
svp->segs[n_segs].bbox.y0 = points[0].y;
svp->segs[n_segs].bbox.y1 = points[n_points - 1].y;
n_segs++;
points = NULL;
}
if (points == NULL)
{
n_points_max = 4;
points = art_new (ArtPoint, n_points_max);
}
n_points = 1;
points[0].x = x = vpath[i].x;
points[0].y = y = vpath[i].y;
x_min = x;
x_max = x;
dir = 0;
}
else /* must be LINETO */
{
new_dir = (vpath[i].y > y ||
(vpath[i].y == y && vpath[i].x > x)) ? 1 : -1;
if (dir && dir != new_dir)
{
/* new segment */
x = points[n_points - 1].x;
y = points[n_points - 1].y;
if (n_segs == n_segs_max)
{
n_segs_max <<= 1;
svp = (ArtSVP *)art_realloc (svp, sizeof(ArtSVP) +
(n_segs_max - 1) *
sizeof(ArtSVPSeg));
}
svp->segs[n_segs].n_points = n_points;
svp->segs[n_segs].dir = (dir > 0);
if (dir < 0)
reverse_points (points, n_points);
svp->segs[n_segs].points = points;
svp->segs[n_segs].bbox.x0 = x_min;
svp->segs[n_segs].bbox.x1 = x_max;
svp->segs[n_segs].bbox.y0 = points[0].y;
svp->segs[n_segs].bbox.y1 = points[n_points - 1].y;
n_segs++;
n_points = 1;
n_points_max = 4;
points = art_new (ArtPoint, n_points_max);
points[0].x = x;
points[0].y = y;
x_min = x;
x_max = x;
}
if (points != NULL)
{
if (n_points == n_points_max)
art_expand (points, ArtPoint, n_points_max);
points[n_points].x = x = vpath[i].x;
points[n_points].y = y = vpath[i].y;
if (x < x_min) x_min = x;
else if (x > x_max) x_max = x;
n_points++;
}
dir = new_dir;
}
i++;
}
if (points != NULL)
{
if (n_points >= 2)
{
if (n_segs == n_segs_max)
{
n_segs_max <<= 1;
svp = (ArtSVP *)art_realloc (svp, sizeof(ArtSVP) +
(n_segs_max - 1) *
sizeof(ArtSVPSeg));
}
svp->segs[n_segs].n_points = n_points;
svp->segs[n_segs].dir = (dir > 0);
if (dir < 0)
reverse_points (points, n_points);
svp->segs[n_segs].points = points;
svp->segs[n_segs].bbox.x0 = x_min;
svp->segs[n_segs].bbox.x1 = x_max;
svp->segs[n_segs].bbox.y0 = points[0].y;
svp->segs[n_segs].bbox.y1 = points[n_points - 1].y;
n_segs++;
}
else
art_free (points);
}
svp->n_segs = n_segs;
qsort (&svp->segs, n_segs, sizeof (ArtSVPSeg), art_svp_seg_compare);
return svp;
}

42
other-licenses/libart_lgpl/art_svp_vpath.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_SVP_VPATH_H__
#define __ART_SVP_VPATH_H__
#ifdef LIBART_COMPILATION
#include "art_vpath.h"
#else
#include <libart_lgpl/art_vpath.h>
#endif
/* Sort vector paths into sorted vector paths. */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
ArtSVP *
art_svp_from_vpath (ArtVpath *vpath);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_SVP_VPATH_H__ */

729
other-licenses/libart_lgpl/art_svp_vpath_stroke.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998-2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include <math.h>
#include "art_misc.h"
#include "art_vpath.h"
#include "art_svp.h"
#ifdef ART_USE_NEW_INTERSECTOR
#include "art_svp_intersect.h"
#else
#include "art_svp_wind.h"
#endif
#include "art_svp_vpath.h"
#include "art_svp_vpath_stroke.h"
#define EPSILON 1e-6
#define EPSILON_2 1e-12
#define yes_OPTIMIZE_INNER
/* Render an arc segment starting at (xc + x0, yc + y0) to (xc + x1,
yc + y1), centered at (xc, yc), and with given radius. Both x0^2 +
y0^2 and x1^2 + y1^2 should be equal to radius^2.
A positive value of radius means curve to the left, negative means
curve to the right.
*/
static void
art_svp_vpath_stroke_arc (ArtVpath **p_vpath, int *pn, int *pn_max,
double xc, double yc,
double x0, double y0,
double x1, double y1,
double radius,
double flatness)
{
double theta;
double th_0, th_1;
int n_pts;
int i;
double aradius;
aradius = fabs (radius);
theta = 2 * M_SQRT2 * sqrt (flatness / aradius);
th_0 = atan2 (y0, x0);
th_1 = atan2 (y1, x1);
if (radius > 0)
{
/* curve to the left */
if (th_0 < th_1) th_0 += M_PI * 2;
n_pts = ceil ((th_0 - th_1) / theta);
}
else
{
/* curve to the right */
if (th_1 < th_0) th_1 += M_PI * 2;
n_pts = ceil ((th_1 - th_0) / theta);
}
#ifdef VERBOSE
printf ("start %f %f; th_0 = %f, th_1 = %f, r = %f, theta = %f\n", x0, y0, th_0, th_1, radius, theta);
#endif
art_vpath_add_point (p_vpath, pn, pn_max,
ART_LINETO, xc + x0, yc + y0);
for (i = 1; i < n_pts; i++)
{
theta = th_0 + (th_1 - th_0) * i / n_pts;
art_vpath_add_point (p_vpath, pn, pn_max,
ART_LINETO, xc + cos (theta) * aradius,
yc + sin (theta) * aradius);
#ifdef VERBOSE
printf ("mid %f %f\n", cos (theta) * radius, sin (theta) * radius);
#endif
}
art_vpath_add_point (p_vpath, pn, pn_max,
ART_LINETO, xc + x1, yc + y1);
#ifdef VERBOSE
printf ("end %f %f\n", x1, y1);
#endif
}
/* Assume that forw and rev are at point i0. Bring them to i1,
joining with the vector i1 - i2.
This used to be true, but isn't now that the stroke_raw code is
filtering out (near)zero length vectors: {It so happens that all
invocations of this function maintain the precondition i1 = i0 + 1,
so we could decrease the number of arguments by one. We haven't
done that here, though.}
forw is to the line's right and rev is to its left.
Precondition: no zero-length vectors, otherwise a divide by
zero will happen. */
static void
render_seg (ArtVpath **p_forw, int *pn_forw, int *pn_forw_max,
ArtVpath **p_rev, int *pn_rev, int *pn_rev_max,
ArtVpath *vpath, int i0, int i1, int i2,
ArtPathStrokeJoinType join,
double line_width, double miter_limit, double flatness)
{
double dx0, dy0;
double dx1, dy1;
double dlx0, dly0;
double dlx1, dly1;
double dmx, dmy;
double dmr2;
double scale;
double cross;
#ifdef VERBOSE
printf ("join style = %d\n", join);
#endif
/* The vectors of the lines from i0 to i1 and i1 to i2. */
dx0 = vpath[i1].x - vpath[i0].x;
dy0 = vpath[i1].y - vpath[i0].y;
dx1 = vpath[i2].x - vpath[i1].x;
dy1 = vpath[i2].y - vpath[i1].y;
/* Set dl[xy]0 to the vector from i0 to i1, rotated counterclockwise
90 degrees, and scaled to the length of line_width. */
scale = line_width / sqrt (dx0 * dx0 + dy0 * dy0);
dlx0 = dy0 * scale;
dly0 = -dx0 * scale;
/* Set dl[xy]1 to the vector from i1 to i2, rotated counterclockwise
90 degrees, and scaled to the length of line_width. */
scale = line_width / sqrt (dx1 * dx1 + dy1 * dy1);
dlx1 = dy1 * scale;
dly1 = -dx1 * scale;
#ifdef VERBOSE
printf ("%% render_seg: (%g, %g) - (%g, %g) - (%g, %g)\n",
vpath[i0].x, vpath[i0].y,
vpath[i1].x, vpath[i1].y,
vpath[i2].x, vpath[i2].y);
printf ("%% render_seg: d[xy]0 = (%g, %g), dl[xy]0 = (%g, %g)\n",
dx0, dy0, dlx0, dly0);
printf ("%% render_seg: d[xy]1 = (%g, %g), dl[xy]1 = (%g, %g)\n",
dx1, dy1, dlx1, dly1);
#endif
/* now, forw's last point is expected to be colinear along d[xy]0
to point i0 - dl[xy]0, and rev with i0 + dl[xy]0. */
/* positive for positive area (i.e. left turn) */
cross = dx1 * dy0 - dx0 * dy1;
dmx = (dlx0 + dlx1) * 0.5;
dmy = (dly0 + dly1) * 0.5;
dmr2 = dmx * dmx + dmy * dmy;
if (join == ART_PATH_STROKE_JOIN_MITER &&
dmr2 * miter_limit * miter_limit < line_width * line_width)
join = ART_PATH_STROKE_JOIN_BEVEL;
/* the case when dmr2 is zero or very small bothers me
(i.e. near a 180 degree angle) */
scale = line_width * line_width / dmr2;
dmx *= scale;
dmy *= scale;
if (cross * cross < EPSILON_2 && dx0 * dx1 + dy0 * dy1 >= 0)
{
/* going straight */
#ifdef VERBOSE
printf ("%% render_seg: straight\n");
#endif
art_vpath_add_point (p_forw, pn_forw, pn_forw_max,
ART_LINETO, vpath[i1].x - dlx0, vpath[i1].y - dly0);
art_vpath_add_point (p_rev, pn_rev, pn_rev_max,
ART_LINETO, vpath[i1].x + dlx0, vpath[i1].y + dly0);
}
else if (cross > 0)
{
/* left turn, forw is outside and rev is inside */
#ifdef VERBOSE
printf ("%% render_seg: left\n");
#endif
if (
#ifdef NO_OPTIMIZE_INNER
0 &&
#endif
/* check that i1 + dm[xy] is inside i0-i1 rectangle */
(dx0 + dmx) * dx0 + (dy0 + dmy) * dy0 > 0 &&
/* and that i1 + dm[xy] is inside i1-i2 rectangle */
((dx1 - dmx) * dx1 + (dy1 - dmy) * dy1 > 0)
#ifdef PEDANTIC_INNER
&&
/* check that i1 + dl[xy]1 is inside i0-i1 rectangle */
(dx0 + dlx1) * dx0 + (dy0 + dly1) * dy0 > 0 &&
/* and that i1 + dl[xy]0 is inside i1-i2 rectangle */
((dx1 - dlx0) * dx1 + (dy1 - dly0) * dy1 > 0)
#endif
)
{
/* can safely add single intersection point */
art_vpath_add_point (p_rev, pn_rev, pn_rev_max,
ART_LINETO, vpath[i1].x + dmx, vpath[i1].y + dmy);
}
else
{
/* need to loop-de-loop the inside */
art_vpath_add_point (p_rev, pn_rev, pn_rev_max,
ART_LINETO, vpath[i1].x + dlx0, vpath[i1].y + dly0);
art_vpath_add_point (p_rev, pn_rev, pn_rev_max,
ART_LINETO, vpath[i1].x, vpath[i1].y);
art_vpath_add_point (p_rev, pn_rev, pn_rev_max,
ART_LINETO, vpath[i1].x + dlx1, vpath[i1].y + dly1);
}
if (join == ART_PATH_STROKE_JOIN_BEVEL)
{
/* bevel */
art_vpath_add_point (p_forw, pn_forw, pn_forw_max,
ART_LINETO, vpath[i1].x - dlx0, vpath[i1].y - dly0);
art_vpath_add_point (p_forw, pn_forw, pn_forw_max,
ART_LINETO, vpath[i1].x - dlx1, vpath[i1].y - dly1);
}
else if (join == ART_PATH_STROKE_JOIN_MITER)
{
art_vpath_add_point (p_forw, pn_forw, pn_forw_max,
ART_LINETO, vpath[i1].x - dmx, vpath[i1].y - dmy);
}
else if (join == ART_PATH_STROKE_JOIN_ROUND)
art_svp_vpath_stroke_arc (p_forw, pn_forw, pn_forw_max,
vpath[i1].x, vpath[i1].y,
-dlx0, -dly0,
-dlx1, -dly1,
line_width,
flatness);
}
else
{
/* right turn, rev is outside and forw is inside */
#ifdef VERBOSE
printf ("%% render_seg: right\n");
#endif
if (
#ifdef NO_OPTIMIZE_INNER
0 &&
#endif
/* check that i1 - dm[xy] is inside i0-i1 rectangle */
(dx0 - dmx) * dx0 + (dy0 - dmy) * dy0 > 0 &&
/* and that i1 - dm[xy] is inside i1-i2 rectangle */
((dx1 + dmx) * dx1 + (dy1 + dmy) * dy1 > 0)
#ifdef PEDANTIC_INNER
&&
/* check that i1 - dl[xy]1 is inside i0-i1 rectangle */
(dx0 - dlx1) * dx0 + (dy0 - dly1) * dy0 > 0 &&
/* and that i1 - dl[xy]0 is inside i1-i2 rectangle */
((dx1 + dlx0) * dx1 + (dy1 + dly0) * dy1 > 0)
#endif
)
{
/* can safely add single intersection point */
art_vpath_add_point (p_forw, pn_forw, pn_forw_max,
ART_LINETO, vpath[i1].x - dmx, vpath[i1].y - dmy);
}
else
{
/* need to loop-de-loop the inside */
art_vpath_add_point (p_forw, pn_forw, pn_forw_max,
ART_LINETO, vpath[i1].x - dlx0, vpath[i1].y - dly0);
art_vpath_add_point (p_forw, pn_forw, pn_forw_max,
ART_LINETO, vpath[i1].x, vpath[i1].y);
art_vpath_add_point (p_forw, pn_forw, pn_forw_max,
ART_LINETO, vpath[i1].x - dlx1, vpath[i1].y - dly1);
}
if (join == ART_PATH_STROKE_JOIN_BEVEL)
{
/* bevel */
art_vpath_add_point (p_rev, pn_rev, pn_rev_max,
ART_LINETO, vpath[i1].x + dlx0, vpath[i1].y + dly0);
art_vpath_add_point (p_rev, pn_rev, pn_rev_max,
ART_LINETO, vpath[i1].x + dlx1, vpath[i1].y + dly1);
}
else if (join == ART_PATH_STROKE_JOIN_MITER)
{
art_vpath_add_point (p_rev, pn_rev, pn_rev_max,
ART_LINETO, vpath[i1].x + dmx, vpath[i1].y + dmy);
}
else if (join == ART_PATH_STROKE_JOIN_ROUND)
art_svp_vpath_stroke_arc (p_rev, pn_rev, pn_rev_max,
vpath[i1].x, vpath[i1].y,
dlx0, dly0,
dlx1, dly1,
-line_width,
flatness);
}
}
/* caps i1, under the assumption of a vector from i0 */
static void
render_cap (ArtVpath **p_result, int *pn_result, int *pn_result_max,
ArtVpath *vpath, int i0, int i1,
ArtPathStrokeCapType cap, double line_width, double flatness)
{
double dx0, dy0;
double dlx0, dly0;
double scale;
int n_pts;
int i;
dx0 = vpath[i1].x - vpath[i0].x;
dy0 = vpath[i1].y - vpath[i0].y;
/* Set dl[xy]0 to the vector from i0 to i1, rotated counterclockwise
90 degrees, and scaled to the length of line_width. */
scale = line_width / sqrt (dx0 * dx0 + dy0 * dy0);
dlx0 = dy0 * scale;
dly0 = -dx0 * scale;
#ifdef VERBOSE
printf ("cap style = %d\n", cap);
#endif
switch (cap)
{
case ART_PATH_STROKE_CAP_BUTT:
art_vpath_add_point (p_result, pn_result, pn_result_max,
ART_LINETO, vpath[i1].x - dlx0, vpath[i1].y - dly0);
art_vpath_add_point (p_result, pn_result, pn_result_max,
ART_LINETO, vpath[i1].x + dlx0, vpath[i1].y + dly0);
break;
case ART_PATH_STROKE_CAP_ROUND:
n_pts = ceil (M_PI / (2.0 * M_SQRT2 * sqrt (flatness / line_width)));
art_vpath_add_point (p_result, pn_result, pn_result_max,
ART_LINETO, vpath[i1].x - dlx0, vpath[i1].y - dly0);
for (i = 1; i < n_pts; i++)
{
double theta, c_th, s_th;
theta = M_PI * i / n_pts;
c_th = cos (theta);
s_th = sin (theta);
art_vpath_add_point (p_result, pn_result, pn_result_max,
ART_LINETO,
vpath[i1].x - dlx0 * c_th - dly0 * s_th,
vpath[i1].y - dly0 * c_th + dlx0 * s_th);
}
art_vpath_add_point (p_result, pn_result, pn_result_max,
ART_LINETO, vpath[i1].x + dlx0, vpath[i1].y + dly0);
break;
case ART_PATH_STROKE_CAP_SQUARE:
art_vpath_add_point (p_result, pn_result, pn_result_max,
ART_LINETO,
vpath[i1].x - dlx0 - dly0,
vpath[i1].y - dly0 + dlx0);
art_vpath_add_point (p_result, pn_result, pn_result_max,
ART_LINETO,
vpath[i1].x + dlx0 - dly0,
vpath[i1].y + dly0 + dlx0);
break;
}
}
/**
* art_svp_from_vpath_raw: Stroke a vector path, raw version
* @vpath: #ArtVPath to stroke.
* @join: Join style.
* @cap: Cap style.
* @line_width: Width of stroke.
* @miter_limit: Miter limit.
* @flatness: Flatness.
*
* Exactly the same as art_svp_vpath_stroke(), except that the resulting
* stroke outline may self-intersect and have regions of winding number
* greater than 1.
*
* Return value: Resulting raw stroked outline in svp format.
**/
ArtVpath *
art_svp_vpath_stroke_raw (ArtVpath *vpath,
ArtPathStrokeJoinType join,
ArtPathStrokeCapType cap,
double line_width,
double miter_limit,
double flatness)
{
int begin_idx, end_idx;
int i;
ArtVpath *forw, *rev;
int n_forw, n_rev;
int n_forw_max, n_rev_max;
ArtVpath *result;
int n_result, n_result_max;
double half_lw = 0.5 * line_width;
int closed;
int last, this, next, second;
double dx, dy;
n_forw_max = 16;
forw = art_new (ArtVpath, n_forw_max);
n_rev_max = 16;
rev = art_new (ArtVpath, n_rev_max);
n_result = 0;
n_result_max = 16;
result = art_new (ArtVpath, n_result_max);
for (begin_idx = 0; vpath[begin_idx].code != ART_END; begin_idx = end_idx)
{
n_forw = 0;
n_rev = 0;
closed = (vpath[begin_idx].code == ART_MOVETO);
/* we don't know what the first point joins with until we get to the
last point and see if it's closed. So we start with the second
line in the path.
Note: this is not strictly true (we now know it's closed from
the opening pathcode), but why fix code that isn't broken?
*/
this = begin_idx;
/* skip over identical points at the beginning of the subpath */
for (i = this + 1; vpath[i].code == ART_LINETO; i++)
{
dx = vpath[i].x - vpath[this].x;
dy = vpath[i].y - vpath[this].y;
if (dx * dx + dy * dy > EPSILON_2)
break;
}
next = i;
second = next;
/* invariant: this doesn't coincide with next */
while (vpath[next].code == ART_LINETO)
{
last = this;
this = next;
/* skip over identical points after the beginning of the subpath */
for (i = this + 1; vpath[i].code == ART_LINETO; i++)
{
dx = vpath[i].x - vpath[this].x;
dy = vpath[i].y - vpath[this].y;
if (dx * dx + dy * dy > EPSILON_2)
break;
}
next = i;
if (vpath[next].code != ART_LINETO)
{
/* reached end of path */
/* make "closed" detection conform to PostScript
semantics (i.e. explicit closepath code rather than
just the fact that end of the path is the beginning) */
if (closed &&
vpath[this].x == vpath[begin_idx].x &&
vpath[this].y == vpath[begin_idx].y)
{
int j;
/* path is closed, render join to beginning */
render_seg (&forw, &n_forw, &n_forw_max,
&rev, &n_rev, &n_rev_max,
vpath, last, this, second,
join, half_lw, miter_limit, flatness);
#ifdef VERBOSE
printf ("%% forw %d, rev %d\n", n_forw, n_rev);
#endif
/* do forward path */
art_vpath_add_point (&result, &n_result, &n_result_max,
ART_MOVETO, forw[n_forw - 1].x,
forw[n_forw - 1].y);
for (j = 0; j < n_forw; j++)
art_vpath_add_point (&result, &n_result, &n_result_max,
ART_LINETO, forw[j].x,
forw[j].y);
/* do reverse path, reversed */
art_vpath_add_point (&result, &n_result, &n_result_max,
ART_MOVETO, rev[0].x,
rev[0].y);
for (j = n_rev - 1; j >= 0; j--)
art_vpath_add_point (&result, &n_result, &n_result_max,
ART_LINETO, rev[j].x,
rev[j].y);
}
else
{
/* path is open */
int j;
/* add to forw rather than result to ensure that
forw has at least one point. */
render_cap (&forw, &n_forw, &n_forw_max,
vpath, last, this,
cap, half_lw, flatness);
art_vpath_add_point (&result, &n_result, &n_result_max,
ART_MOVETO, forw[0].x,
forw[0].y);
for (j = 1; j < n_forw; j++)
art_vpath_add_point (&result, &n_result, &n_result_max,
ART_LINETO, forw[j].x,
forw[j].y);
for (j = n_rev - 1; j >= 0; j--)
art_vpath_add_point (&result, &n_result, &n_result_max,
ART_LINETO, rev[j].x,
rev[j].y);
render_cap (&result, &n_result, &n_result_max,
vpath, second, begin_idx,
cap, half_lw, flatness);
art_vpath_add_point (&result, &n_result, &n_result_max,
ART_LINETO, forw[0].x,
forw[0].y);
}
}
else
render_seg (&forw, &n_forw, &n_forw_max,
&rev, &n_rev, &n_rev_max,
vpath, last, this, next,
join, half_lw, miter_limit, flatness);
}
end_idx = next;
}
art_free (forw);
art_free (rev);
#ifdef VERBOSE
printf ("%% n_result = %d\n", n_result);
#endif
art_vpath_add_point (&result, &n_result, &n_result_max, ART_END, 0, 0);
return result;
}
#define noVERBOSE
#ifdef VERBOSE
#define XOFF 50
#define YOFF 700
static void
print_ps_vpath (ArtVpath *vpath)
{
int i;
for (i = 0; vpath[i].code != ART_END; i++)
{
switch (vpath[i].code)
{
case ART_MOVETO:
printf ("%g %g moveto\n", XOFF + vpath[i].x, YOFF - vpath[i].y);
break;
case ART_LINETO:
printf ("%g %g lineto\n", XOFF + vpath[i].x, YOFF - vpath[i].y);
break;
default:
break;
}
}
printf ("stroke showpage\n");
}
static void
print_ps_svp (ArtSVP *vpath)
{
int i, j;
printf ("%% begin\n");
for (i = 0; i < vpath->n_segs; i++)
{
printf ("%g setgray\n", vpath->segs[i].dir ? 0.7 : 0);
for (j = 0; j < vpath->segs[i].n_points; j++)
{
printf ("%g %g %s\n",
XOFF + vpath->segs[i].points[j].x,
YOFF - vpath->segs[i].points[j].y,
j ? "lineto" : "moveto");
}
printf ("stroke\n");
}
printf ("showpage\n");
}
#endif
/* Render a vector path into a stroked outline.
Status of this routine:
Basic correctness: Only miter and bevel line joins are implemented,
and only butt line caps. Otherwise, seems to be fine.
Numerical stability: We cheat (adding random perturbation). Thus,
it seems very likely that no numerical stability problems will be
seen in practice.
Speed: Should be pretty good.
Precision: The perturbation fuzzes the coordinates slightly,
but not enough to be visible. */
/**
* art_svp_vpath_stroke: Stroke a vector path.
* @vpath: #ArtVPath to stroke.
* @join: Join style.
* @cap: Cap style.
* @line_width: Width of stroke.
* @miter_limit: Miter limit.
* @flatness: Flatness.
*
* Computes an svp representing the stroked outline of @vpath. The
* width of the stroked line is @line_width.
*
* Lines are joined according to the @join rule. Possible values are
* ART_PATH_STROKE_JOIN_MITER (for mitered joins),
* ART_PATH_STROKE_JOIN_ROUND (for round joins), and
* ART_PATH_STROKE_JOIN_BEVEL (for bevelled joins). The mitered join
* is converted to a bevelled join if the miter would extend to a
* distance of more than @miter_limit * @line_width from the actual
* join point.
*
* If there are open subpaths, the ends of these subpaths are capped
* according to the @cap rule. Possible values are
* ART_PATH_STROKE_CAP_BUTT (squared cap, extends exactly to end
* point), ART_PATH_STROKE_CAP_ROUND (rounded half-circle centered at
* the end point), and ART_PATH_STROKE_CAP_SQUARE (squared cap,
* extending half @line_width past the end point).
*
* The @flatness parameter controls the accuracy of the rendering. It
* is most important for determining the number of points to use to
* approximate circular arcs for round lines and joins. In general, the
* resulting vector path will be within @flatness pixels of the "ideal"
* path containing actual circular arcs. I reserve the right to use
* the @flatness parameter to convert bevelled joins to miters for very
* small turn angles, as this would reduce the number of points in the
* resulting outline path.
*
* The resulting path is "clean" with respect to self-intersections, i.e.
* the winding number is 0 or 1 at each point.
*
* Return value: Resulting stroked outline in svp format.
**/
ArtSVP *
art_svp_vpath_stroke (ArtVpath *vpath,
ArtPathStrokeJoinType join,
ArtPathStrokeCapType cap,
double line_width,
double miter_limit,
double flatness)
{
#ifdef ART_USE_NEW_INTERSECTOR
ArtVpath *vpath_stroke;
ArtSVP *svp, *svp2;
ArtSvpWriter *swr;
vpath_stroke = art_svp_vpath_stroke_raw (vpath, join, cap,
line_width, miter_limit, flatness);
#ifdef VERBOSE
print_ps_vpath (vpath_stroke);
#endif
svp = art_svp_from_vpath (vpath_stroke);
#ifdef VERBOSE
print_ps_svp (svp);
#endif
art_free (vpath_stroke);
swr = art_svp_writer_rewind_new (ART_WIND_RULE_NONZERO);
art_svp_intersector (svp, swr);
svp2 = art_svp_writer_rewind_reap (swr);
#ifdef VERBOSE
print_ps_svp (svp2);
#endif
art_svp_free (svp);
return svp2;
#else
ArtVpath *vpath_stroke, *vpath2;
ArtSVP *svp, *svp2, *svp3;
vpath_stroke = art_svp_vpath_stroke_raw (vpath, join, cap,
line_width, miter_limit, flatness);
#ifdef VERBOSE
print_ps_vpath (vpath_stroke);
#endif
vpath2 = art_vpath_perturb (vpath_stroke);
#ifdef VERBOSE
print_ps_vpath (vpath2);
#endif
art_free (vpath_stroke);
svp = art_svp_from_vpath (vpath2);
#ifdef VERBOSE
print_ps_svp (svp);
#endif
art_free (vpath2);
svp2 = art_svp_uncross (svp);
#ifdef VERBOSE
print_ps_svp (svp2);
#endif
art_svp_free (svp);
svp3 = art_svp_rewind_uncrossed (svp2, ART_WIND_RULE_NONZERO);
#ifdef VERBOSE
print_ps_svp (svp3);
#endif
art_svp_free (svp2);
return svp3;
#endif
}

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_SVP_VPATH_STROKE_H__
#define __ART_SVP_VPATH_STROKE_H__
/* Sort vector paths into sorted vector paths. */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef enum {
ART_PATH_STROKE_JOIN_MITER,
ART_PATH_STROKE_JOIN_ROUND,
ART_PATH_STROKE_JOIN_BEVEL
} ArtPathStrokeJoinType;
typedef enum {
ART_PATH_STROKE_CAP_BUTT,
ART_PATH_STROKE_CAP_ROUND,
ART_PATH_STROKE_CAP_SQUARE
} ArtPathStrokeCapType;
ArtSVP *
art_svp_vpath_stroke (ArtVpath *vpath,
ArtPathStrokeJoinType join,
ArtPathStrokeCapType cap,
double line_width,
double miter_limit,
double flatness);
/* This version may have winding numbers exceeding 1. */
ArtVpath *
art_svp_vpath_stroke_raw (ArtVpath *vpath,
ArtPathStrokeJoinType join,
ArtPathStrokeCapType cap,
double line_width,
double miter_limit,
double flatness);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_SVP_VPATH_STROKE_H__ */

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other-licenses/libart_lgpl/art_svp_wind.c Normal file
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other-licenses/libart_lgpl/art_svp_wind.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_SVP_WIND_H__
#define __ART_SVP_WIND_H__
/* Primitive intersection and winding number operations on sorted
vector paths. */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#ifndef ART_WIND_RULE_DEFINED
#define ART_WIND_RULE_DEFINED
typedef enum {
ART_WIND_RULE_NONZERO,
ART_WIND_RULE_INTERSECT,
ART_WIND_RULE_ODDEVEN,
ART_WIND_RULE_POSITIVE
} ArtWindRule;
#endif
ArtSVP *
art_svp_uncross (ArtSVP *vp);
ArtSVP *
art_svp_rewind_uncrossed (ArtSVP *vp, ArtWindRule rule);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_SVP_WIND_H__ */

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other-licenses/libart_lgpl/art_uta.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <string.h>
#include "art_misc.h"
#include "art_uta.h"
/**
* art_uta_new: Allocate a new uta.
* @x0: Left coordinate of uta.
* @y0: Top coordinate of uta.
* @x1: Right coordinate of uta.
* @y1: Bottom coordinate of uta.
*
* Allocates a new microtile array. The arguments are in units of
* tiles, not pixels.
*
* Returns: the newly allocated #ArtUta.
**/
ArtUta *
art_uta_new (int x0, int y0, int x1, int y1)
{
ArtUta *uta;
uta = art_new (ArtUta, 1);
uta->x0 = x0;
uta->y0 = y0;
uta->width = x1 - x0;
uta->height = y1 - y0;
uta->utiles = art_new (ArtUtaBbox, uta->width * uta->height);
memset (uta->utiles, 0, uta->width * uta->height * sizeof(ArtUtaBbox));
return uta;
}
/**
* art_uta_new_coords: Allocate a new uta, based on pixel coordinates.
* @x0: Left coordinate of uta.
* @y0: Top coordinate of uta.
* @x1: Right coordinate of uta.
* @y1: Bottom coordinate of uta.
*
* Allocates a new microtile array. The arguments are in pixels
*
* Returns: the newly allocated #ArtUta.
**/
ArtUta *
art_uta_new_coords (int x0, int y0, int x1, int y1)
{
return art_uta_new (x0 >> ART_UTILE_SHIFT, y0 >> ART_UTILE_SHIFT,
1 + (x1 >> ART_UTILE_SHIFT),
1 + (y1 >> ART_UTILE_SHIFT));
}
/**
* art_uta_free: Free a uta.
* @uta: The uta to free.
*
* Frees the microtile array structure, including the actual microtile
* data.
**/
void
art_uta_free (ArtUta *uta)
{
art_free (uta->utiles);
art_free (uta);
}
/* User to Aardvark! */

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other-licenses/libart_lgpl/art_uta.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_UTA_H__
#define __ART_UTA_H__
/* Basic data structures and constructors for microtile arrays */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef art_u32 ArtUtaBbox;
typedef struct _ArtUta ArtUta;
#define ART_UTA_BBOX_CONS(x0, y0, x1, y1) (((x0) << 24) | ((y0) << 16) | \
((x1) << 8) | (y1))
#define ART_UTA_BBOX_X0(ub) ((ub) >> 24)
#define ART_UTA_BBOX_Y0(ub) (((ub) >> 16) & 0xff)
#define ART_UTA_BBOX_X1(ub) (((ub) >> 8) & 0xff)
#define ART_UTA_BBOX_Y1(ub) ((ub) & 0xff)
#define ART_UTILE_SHIFT 5
#define ART_UTILE_SIZE (1 << ART_UTILE_SHIFT)
/* Coordinates are shifted right by ART_UTILE_SHIFT wrt the real
coordinates. */
struct _ArtUta {
int x0;
int y0;
int width;
int height;
ArtUtaBbox *utiles;
};
ArtUta *
art_uta_new (int x0, int y0, int x1, int y1);
ArtUta *
art_uta_new_coords (int x0, int y0, int x1, int y1);
void
art_uta_free (ArtUta *uta);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_UTA_H__ */

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998-2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <string.h>
#include "art_misc.h"
#include "art_uta.h"
#include "art_uta_ops.h"
#ifndef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif
#ifndef MAX
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif
/**
* art_uta_union: Compute union of two uta's.
* @uta1: One uta.
* @uta2: The other uta.
*
* Computes the union of @uta1 and @uta2. The union is approximate,
* but coverage is guaranteed over all pixels included in either of
* the arguments, ie more pixels may be covered than the "exact"
* union.
*
* Note: this routine is used in the Gnome Canvas to accumulate the
* region that needs to be repainted. However, since it copies over
* the entire uta (which might be largish) even when the update may be
* small, it can be a performance bottleneck. There are two approaches
* to this problem, both of which are probably worthwhile. First, the
* generated uta's should always be limited to the visible window,
* thus guaranteeing that uta's never become large. Second, there
* should be a new, destructive union operation that only touches a
* small part of the uta when the update is small.
*
* Return value: The new union uta.
**/
ArtUta *
art_uta_union (ArtUta *uta1, ArtUta *uta2)
{
ArtUta *uta;
int x0, y0, x1, y1;
int x, y;
int ix, ix1, ix2;
ArtUtaBbox bb, bb1, bb2;
x0 = MIN(uta1->x0, uta2->x0);
y0 = MIN(uta1->y0, uta2->y0);
x1 = MAX(uta1->x0 + uta1->width, uta2->x0 + uta2->width);
y1 = MAX(uta1->y0 + uta1->height, uta2->y0 + uta2->height);
uta = art_uta_new (x0, y0, x1, y1);
/* could move the first two if/else statements out of the loop */
ix = 0;
for (y = y0; y < y1; y++)
{
ix1 = (y - uta1->y0) * uta1->width + x0 - uta1->x0;
ix2 = (y - uta2->y0) * uta2->width + x0 - uta2->x0;
for (x = x0; x < x1; x++)
{
if (x < uta1->x0 || y < uta1->y0 ||
x >= uta1->x0 + uta1->width || y >= uta1->y0 + uta1->height)
bb1 = 0;
else
bb1 = uta1->utiles[ix1];
if (x < uta2->x0 || y < uta2->y0 ||
x >= uta2->x0 + uta2->width || y >= uta2->y0 + uta2->height)
bb2 = 0;
else
bb2 = uta2->utiles[ix2];
if (bb1 == 0)
bb = bb2;
else if (bb2 == 0)
bb = bb1;
else
bb = ART_UTA_BBOX_CONS(MIN(ART_UTA_BBOX_X0(bb1),
ART_UTA_BBOX_X0(bb2)),
MIN(ART_UTA_BBOX_Y0(bb1),
ART_UTA_BBOX_Y0(bb2)),
MAX(ART_UTA_BBOX_X1(bb1),
ART_UTA_BBOX_X1(bb2)),
MAX(ART_UTA_BBOX_Y1(bb1),
ART_UTA_BBOX_Y1(bb2)));
uta->utiles[ix] = bb;
ix++;
ix1++;
ix2++;
}
}
return uta;
}

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other-licenses/libart_lgpl/art_uta_ops.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_UTA_OPS_H__
#define __ART_UTA_OPS_H__
/* Basic operations on microtile arrays */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
ArtUta *
art_uta_union (ArtUta *uta1, ArtUta *uta2);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_UTA_OPS_H__ */

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "art_misc.h"
#include "art_uta.h"
#include "art_rect.h"
#include "art_uta_rect.h"
/**
* art_uta_from_irect: Generate uta covering a rectangle.
* @bbox: The source rectangle.
*
* Generates a uta exactly covering @bbox. Please do not call this
* function with a @bbox with zero height or width.
*
* Return value: the new uta.
**/
ArtUta *
art_uta_from_irect (ArtIRect *bbox)
{
ArtUta *uta;
ArtUtaBbox *utiles;
ArtUtaBbox bb;
int width, height;
int x, y;
int xf0, yf0, xf1, yf1;
int ix;
uta = art_new (ArtUta, 1);
uta->x0 = bbox->x0 >> ART_UTILE_SHIFT;
uta->y0 = bbox->y0 >> ART_UTILE_SHIFT;
width = ((bbox->x1 + ART_UTILE_SIZE - 1) >> ART_UTILE_SHIFT) - uta->x0;
height = ((bbox->y1 + ART_UTILE_SIZE - 1) >> ART_UTILE_SHIFT) - uta->y0;
utiles = art_new (ArtUtaBbox, width * height);
uta->width = width;
uta->height = height;
uta->utiles = utiles;
xf0 = bbox->x0 & (ART_UTILE_SIZE - 1);
yf0 = bbox->y0 & (ART_UTILE_SIZE - 1);
xf1 = ((bbox->x1 - 1) & (ART_UTILE_SIZE - 1)) + 1;
yf1 = ((bbox->y1 - 1) & (ART_UTILE_SIZE - 1)) + 1;
if (height == 1)
{
if (width == 1)
utiles[0] = ART_UTA_BBOX_CONS (xf0, yf0, xf1, yf1);
else
{
utiles[0] = ART_UTA_BBOX_CONS (xf0, yf0, ART_UTILE_SIZE, yf1);
bb = ART_UTA_BBOX_CONS (0, yf0, ART_UTILE_SIZE, yf1);
for (x = 1; x < width - 1; x++)
utiles[x] = bb;
utiles[x] = ART_UTA_BBOX_CONS (0, yf0, xf1, yf1);
}
}
else
{
if (width == 1)
{
utiles[0] = ART_UTA_BBOX_CONS (xf0, yf0, xf1, ART_UTILE_SIZE);
bb = ART_UTA_BBOX_CONS (xf0, 0, xf1, ART_UTILE_SIZE);
for (y = 1; y < height - 1; y++)
utiles[y] = bb;
utiles[y] = ART_UTA_BBOX_CONS (xf0, 0, xf1, yf1);
}
else
{
utiles[0] =
ART_UTA_BBOX_CONS (xf0, yf0, ART_UTILE_SIZE, ART_UTILE_SIZE);
bb = ART_UTA_BBOX_CONS (0, yf0, ART_UTILE_SIZE, ART_UTILE_SIZE);
for (x = 1; x < width - 1; x++)
utiles[x] = bb;
utiles[x] = ART_UTA_BBOX_CONS (0, yf0, xf1, ART_UTILE_SIZE);
ix = width;
for (y = 1; y < height - 1; y++)
{
utiles[ix++] =
ART_UTA_BBOX_CONS (xf0, 0, ART_UTILE_SIZE, ART_UTILE_SIZE);
bb = ART_UTA_BBOX_CONS (0, 0, ART_UTILE_SIZE, ART_UTILE_SIZE);
for (x = 1; x < width - 1; x++)
utiles[ix++] = bb;
utiles[ix++] = ART_UTA_BBOX_CONS (0, 0, xf1, ART_UTILE_SIZE);
}
utiles[ix++] = ART_UTA_BBOX_CONS (xf0, 0, ART_UTILE_SIZE, yf1);
bb = ART_UTA_BBOX_CONS (0, 0, ART_UTILE_SIZE, yf1);
for (x = 1; x < width - 1; x++)
utiles[ix++] = bb;
utiles[ix++] = ART_UTA_BBOX_CONS (0, 0, xf1, yf1);
}
}
return uta;
}

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other-licenses/libart_lgpl/art_uta_rect.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_UTA_RECT_H__
#define __ART_UTA_RECT_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
ArtUta *
art_uta_from_irect (ArtIRect *bbox);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_UTA_RECT_H__ */

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other-licenses/libart_lgpl/art_uta_svp.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998-2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* LGPL Copyright 1998 Raph Levien <raph@acm.org> */
#include "art_misc.h"
#include "art_vpath.h"
#include "art_uta.h"
#include "art_uta_vpath.h"
#include "art_svp.h"
#include "art_uta_svp.h"
#include "art_vpath_svp.h"
/**
* art_uta_from_svp: Generate uta covering an svp.
* @svp: The source svp.
*
* Generates a uta covering @svp. The resulting uta is of course
* approximate, ie it may cover more pixels than covered by @svp.
*
* Note: I will want to replace this with a more direct
* implementation. But this gets the api in place.
*
* Return value: the new uta.
**/
ArtUta *
art_uta_from_svp (const ArtSVP *svp)
{
ArtVpath *vpath;
ArtUta *uta;
vpath = art_vpath_from_svp (svp);
uta = art_uta_from_vpath (vpath);
art_free (vpath);
return uta;
}

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other-licenses/libart_lgpl/art_uta_svp.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_UTA_SVP_H__
#define __ART_UTA_SVP_H__
/* Basic data structures and constructors for microtile arrays */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
ArtUta *
art_uta_from_svp (const ArtSVP *svp);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_UTA_SVP_H__ */

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other-licenses/libart_lgpl/art_uta_vpath.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998-2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* LGPL Copyright 1998 Raph Levien <raph@acm.org> */
#include <math.h>
#include "art_misc.h"
#include "art_vpath.h"
#include "art_uta.h"
#include "art_uta_vpath.h"
#ifndef MAX
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
#endif /* MAX */
#ifndef MIN
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#endif /* MIN */
/**
* art_uta_add_line: Add a line to the uta.
* @uta: The uta to modify.
* @x0: X coordinate of line start point.
* @y0: Y coordinate of line start point.
* @x1: X coordinate of line end point.
* @y1: Y coordinate of line end point.
* @rbuf: Buffer containing first difference of winding number.
* @rbuf_rowstride: Rowstride of @rbuf.
*
* Add the line (@x0, @y0) - (@x1, @y1) to @uta, and also update the
* winding number buffer used for rendering the interior. @rbuf
* contains the first partial difference (in the X direction) of the
* winding number, measured in grid cells. Thus, each time that a line
* crosses a horizontal uta grid line, an entry of @rbuf is
* incremented if @y1 > @y0, decremented otherwise.
*
* Note that edge handling is fairly delicate. Please rtfs for
* details.
**/
void
art_uta_add_line (ArtUta *uta, double x0, double y0, double x1, double y1,
int *rbuf, int rbuf_rowstride)
{
int xmin, ymin;
double xmax, ymax;
int xmaxf, ymaxf;
int xmaxc, ymaxc;
int xt0, yt0;
int xt1, yt1;
int xf0, yf0;
int xf1, yf1;
int ix, ix1;
ArtUtaBbox bb;
xmin = floor (MIN(x0, x1));
xmax = MAX(x0, x1);
xmaxf = floor (xmax);
xmaxc = ceil (xmax);
ymin = floor (MIN(y0, y1));
ymax = MAX(y0, y1);
ymaxf = floor (ymax);
ymaxc = ceil (ymax);
xt0 = (xmin >> ART_UTILE_SHIFT) - uta->x0;
yt0 = (ymin >> ART_UTILE_SHIFT) - uta->y0;
xt1 = (xmaxf >> ART_UTILE_SHIFT) - uta->x0;
yt1 = (ymaxf >> ART_UTILE_SHIFT) - uta->y0;
if (xt0 == xt1 && yt0 == yt1)
{
/* entirely inside a microtile, this is easy! */
xf0 = xmin & (ART_UTILE_SIZE - 1);
yf0 = ymin & (ART_UTILE_SIZE - 1);
xf1 = (xmaxf & (ART_UTILE_SIZE - 1)) + xmaxc - xmaxf;
yf1 = (ymaxf & (ART_UTILE_SIZE - 1)) + ymaxc - ymaxf;
ix = yt0 * uta->width + xt0;
bb = uta->utiles[ix];
if (bb == 0)
bb = ART_UTA_BBOX_CONS(xf0, yf0, xf1, yf1);
else
bb = ART_UTA_BBOX_CONS(MIN(ART_UTA_BBOX_X0(bb), xf0),
MIN(ART_UTA_BBOX_Y0(bb), yf0),
MAX(ART_UTA_BBOX_X1(bb), xf1),
MAX(ART_UTA_BBOX_Y1(bb), yf1));
uta->utiles[ix] = bb;
}
else
{
double dx, dy;
int sx, sy;
dx = x1 - x0;
dy = y1 - y0;
sx = dx > 0 ? 1 : dx < 0 ? -1 : 0;
sy = dy > 0 ? 1 : dy < 0 ? -1 : 0;
if (ymin == ymaxf)
{
/* special case horizontal (dx/dy slope would be infinite) */
xf0 = xmin & (ART_UTILE_SIZE - 1);
yf0 = ymin & (ART_UTILE_SIZE - 1);
xf1 = (xmaxf & (ART_UTILE_SIZE - 1)) + xmaxc - xmaxf;
yf1 = (ymaxf & (ART_UTILE_SIZE - 1)) + ymaxc - ymaxf;
ix = yt0 * uta->width + xt0;
ix1 = yt0 * uta->width + xt1;
while (ix != ix1)
{
bb = uta->utiles[ix];
if (bb == 0)
bb = ART_UTA_BBOX_CONS(xf0, yf0, ART_UTILE_SIZE, yf1);
else
bb = ART_UTA_BBOX_CONS(MIN(ART_UTA_BBOX_X0(bb), xf0),
MIN(ART_UTA_BBOX_Y0(bb), yf0),
ART_UTILE_SIZE,
MAX(ART_UTA_BBOX_Y1(bb), yf1));
uta->utiles[ix] = bb;
xf0 = 0;
ix++;
}
bb = uta->utiles[ix];
if (bb == 0)
bb = ART_UTA_BBOX_CONS(0, yf0, xf1, yf1);
else
bb = ART_UTA_BBOX_CONS(0,
MIN(ART_UTA_BBOX_Y0(bb), yf0),
MAX(ART_UTA_BBOX_X1(bb), xf1),
MAX(ART_UTA_BBOX_Y1(bb), yf1));
uta->utiles[ix] = bb;
}
else
{
/* Do a Bresenham-style traversal of the line */
double dx_dy;
double x, y;
double xn, yn;
/* normalize coordinates to uta origin */
x0 -= uta->x0 << ART_UTILE_SHIFT;
y0 -= uta->y0 << ART_UTILE_SHIFT;
x1 -= uta->x0 << ART_UTILE_SHIFT;
y1 -= uta->y0 << ART_UTILE_SHIFT;
if (dy < 0)
{
double tmp;
tmp = x0;
x0 = x1;
x1 = tmp;
tmp = y0;
y0 = y1;
y1 = tmp;
dx = -dx;
sx = -sx;
dy = -dy;
/* we leave sy alone, because it would always be 1,
and we need it for the rbuf stuff. */
}
xt0 = ((int)floor (x0) >> ART_UTILE_SHIFT);
xt1 = ((int)floor (x1) >> ART_UTILE_SHIFT);
/* now [xy]0 is above [xy]1 */
ix = yt0 * uta->width + xt0;
ix1 = yt1 * uta->width + xt1;
#ifdef VERBOSE
printf ("%% ix = %d,%d; ix1 = %d,%d\n", xt0, yt0, xt1, yt1);
#endif
dx_dy = dx / dy;
x = x0;
y = y0;
while (ix != ix1)
{
int dix;
/* figure out whether next crossing is horizontal or vertical */
#ifdef VERBOSE
printf ("%% %d,%d\n", xt0, yt0);
#endif
yn = (yt0 + 1) << ART_UTILE_SHIFT;
xn = x0 + dx_dy * (yn - y0);
if (xt0 != (int)floor (xn) >> ART_UTILE_SHIFT)
{
/* horizontal crossing */
xt0 += sx;
dix = sx;
if (dx > 0)
{
xn = xt0 << ART_UTILE_SHIFT;
yn = y0 + (xn - x0) / dx_dy;
xf0 = (int)floor (x) & (ART_UTILE_SIZE - 1);
xf1 = ART_UTILE_SIZE;
}
else
{
xn = (xt0 + 1) << ART_UTILE_SHIFT;
yn = y0 + (xn - x0) / dx_dy;
xf0 = 0;
xmaxc = (int)ceil (x);
xf1 = xmaxc - ((xt0 + 1) << ART_UTILE_SHIFT);
}
ymaxf = (int)floor (yn);
ymaxc = (int)ceil (yn);
yf1 = (ymaxf & (ART_UTILE_SIZE - 1)) + ymaxc - ymaxf;
}
else
{
/* vertical crossing */
dix = uta->width;
xf0 = (int)floor (MIN(x, xn)) & (ART_UTILE_SIZE - 1);
xmax = MAX(x, xn);
xmaxc = (int)ceil (xmax);
xf1 = xmaxc - (xt0 << ART_UTILE_SHIFT);
yf1 = ART_UTILE_SIZE;
if (rbuf != NULL)
rbuf[yt0 * rbuf_rowstride + xt0] += sy;
yt0++;
}
yf0 = (int)floor (y) & (ART_UTILE_SIZE - 1);
bb = uta->utiles[ix];
if (bb == 0)
bb = ART_UTA_BBOX_CONS(xf0, yf0, xf1, yf1);
else
bb = ART_UTA_BBOX_CONS(MIN(ART_UTA_BBOX_X0(bb), xf0),
MIN(ART_UTA_BBOX_Y0(bb), yf0),
MAX(ART_UTA_BBOX_X1(bb), xf1),
MAX(ART_UTA_BBOX_Y1(bb), yf1));
uta->utiles[ix] = bb;
x = xn;
y = yn;
ix += dix;
}
xmax = MAX(x, x1);
xmaxc = ceil (xmax);
ymaxc = ceil (y1);
xf0 = (int)floor (MIN(x1, x)) & (ART_UTILE_SIZE - 1);
yf0 = (int)floor (y) & (ART_UTILE_SIZE - 1);
xf1 = xmaxc - (xt0 << ART_UTILE_SHIFT);
yf1 = ymaxc - (yt0 << ART_UTILE_SHIFT);
bb = uta->utiles[ix];
if (bb == 0)
bb = ART_UTA_BBOX_CONS(xf0, yf0, xf1, yf1);
else
bb = ART_UTA_BBOX_CONS(MIN(ART_UTA_BBOX_X0(bb), xf0),
MIN(ART_UTA_BBOX_Y0(bb), yf0),
MAX(ART_UTA_BBOX_X1(bb), xf1),
MAX(ART_UTA_BBOX_Y1(bb), yf1));
uta->utiles[ix] = bb;
}
}
}
/**
* art_uta_from_vpath: Generate uta covering a vpath.
* @vec: The source vpath.
*
* Generates a uta covering @vec. The resulting uta is of course
* approximate, ie it may cover more pixels than covered by @vec.
*
* Return value: the new uta.
**/
ArtUta *
art_uta_from_vpath (const ArtVpath *vec)
{
ArtUta *uta;
ArtIRect bbox;
int *rbuf;
int i;
double x, y;
int sum;
int xt, yt;
ArtUtaBbox *utiles;
ArtUtaBbox bb;
int width;
int height;
int ix;
art_vpath_bbox_irect (vec, &bbox);
uta = art_uta_new_coords (bbox.x0, bbox.y0, bbox.x1, bbox.y1);
width = uta->width;
height = uta->height;
utiles = uta->utiles;
rbuf = art_new (int, width * height);
for (i = 0; i < width * height; i++)
rbuf[i] = 0;
x = 0;
y = 0;
for (i = 0; vec[i].code != ART_END; i++)
{
switch (vec[i].code)
{
case ART_MOVETO:
x = vec[i].x;
y = vec[i].y;
break;
case ART_LINETO:
art_uta_add_line (uta, vec[i].x, vec[i].y, x, y, rbuf, width);
x = vec[i].x;
y = vec[i].y;
break;
default:
/* this shouldn't happen */
break;
}
}
/* now add in the filling from rbuf */
ix = 0;
for (yt = 0; yt < height; yt++)
{
sum = 0;
for (xt = 0; xt < width; xt++)
{
sum += rbuf[ix];
/* Nonzero winding rule - others are possible, but hardly
worth it. */
if (sum != 0)
{
bb = utiles[ix];
bb &= 0xffff0000;
bb |= (ART_UTILE_SIZE << 8) | ART_UTILE_SIZE;
utiles[ix] = bb;
if (xt != width - 1)
{
bb = utiles[ix + 1];
bb &= 0xffff00;
bb |= ART_UTILE_SIZE;
utiles[ix + 1] = bb;
}
if (yt != height - 1)
{
bb = utiles[ix + width];
bb &= 0xff0000ff;
bb |= ART_UTILE_SIZE << 8;
utiles[ix + width] = bb;
if (xt != width - 1)
{
utiles[ix + width + 1] &= 0xffff;
}
}
}
ix++;
}
}
art_free (rbuf);
return uta;
}

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other-licenses/libart_lgpl/art_uta_vpath.h Normal file
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@ -0,0 +1,42 @@
/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_UTA_VPATH_H__
#define __ART_UTA_VPATH_H__
/* Basic data structures and constructors for microtile arrays */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
ArtUta *
art_uta_from_vpath (const ArtVpath *vec);
/* This is a private function: */
void
art_uta_add_line (ArtUta *uta, double x0, double y0, double x1, double y1,
int *rbuf, int rbuf_rowstride);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_UTA_VPATH_H__ */

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998-2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Basic constructors and operations for vector paths */
#include <math.h>
#include <stdlib.h>
#include "art_misc.h"
#include "art_rect.h"
#include "art_vpath.h"
/**
* art_vpath_add_point: Add point to vpath.
* @p_vpath: Where the pointer to the #ArtVpath structure is stored.
* @pn_points: Pointer to the number of points in *@p_vpath.
* @pn_points_max: Pointer to the number of points allocated.
* @code: The pathcode for the new point.
* @x: The X coordinate of the new point.
* @y: The Y coordinate of the new point.
*
* Adds a new point to *@p_vpath, reallocating and updating *@p_vpath
* and *@pn_points_max as necessary. *@pn_points is incremented.
*
* This routine always adds the point after all points already in the
* vpath. Thus, it should be called in the order the points are
* desired.
**/
void
art_vpath_add_point (ArtVpath **p_vpath, int *pn_points, int *pn_points_max,
ArtPathcode code, double x, double y)
{
int i;
i = (*pn_points)++;
if (i == *pn_points_max)
art_expand (*p_vpath, ArtVpath, *pn_points_max);
(*p_vpath)[i].code = code;
(*p_vpath)[i].x = x;
(*p_vpath)[i].y = y;
}
/* number of steps should really depend on radius. */
#define CIRCLE_STEPS 128
/**
* art_vpath_new_circle: Create a new circle.
* @x: X coordinate of center.
* @y: Y coordinate of center.
* @r: radius.
*
* Creates a new polygon closely approximating a circle with center
* (@x, @y) and radius @r. Currently, the number of points used in the
* approximation is fixed, but that will probably change.
*
* Return value: The newly created #ArtVpath.
**/
ArtVpath *
art_vpath_new_circle (double x, double y, double r)
{
int i;
ArtVpath *vec;
double theta;
vec = art_new (ArtVpath, CIRCLE_STEPS + 2);
for (i = 0; i < CIRCLE_STEPS + 1; i++)
{
vec[i].code = i ? ART_LINETO : ART_MOVETO;
theta = (i & (CIRCLE_STEPS - 1)) * (M_PI * 2.0 / CIRCLE_STEPS);
vec[i].x = x + r * cos (theta);
vec[i].y = y - r * sin (theta);
}
vec[i].code = ART_END;
return vec;
}
/**
* art_vpath_affine_transform: Affine transform a vpath.
* @src: Source vpath to transform.
* @matrix: Affine transform.
*
* Computes the affine transform of the vpath, using @matrix as the
* transform. @matrix is stored in the same format as PostScript, ie.
* x' = @matrix[0] * x + @matrix[2] * y + @matrix[4]
* y' = @matrix[1] * x + @matrix[3] * y + @matrix[5]
*
* Return value: the newly allocated vpath resulting from the transform.
**/
ArtVpath *
art_vpath_affine_transform (const ArtVpath *src, const double matrix[6])
{
int i;
int size;
ArtVpath *new;
double x, y;
for (i = 0; src[i].code != ART_END; i++);
size = i;
new = art_new (ArtVpath, size + 1);
for (i = 0; i < size; i++)
{
new[i].code = src[i].code;
x = src[i].x;
y = src[i].y;
new[i].x = matrix[0] * x + matrix[2] * y + matrix[4];
new[i].y = matrix[1] * x + matrix[3] * y + matrix[5];
}
new[i].code = ART_END;
return new;
}
/**
* art_vpath_bbox_drect: Determine bounding box of vpath.
* @vec: Source vpath.
* @drect: Where to store bounding box.
*
* Determines bounding box of @vec, and stores it in @drect.
**/
void
art_vpath_bbox_drect (const ArtVpath *vec, ArtDRect *drect)
{
int i;
double x0, y0, x1, y1;
if (vec[0].code == ART_END)
{
x0 = y0 = x1 = y1 = 0;
}
else
{
x0 = x1 = vec[0].x;
y0 = y1 = vec[0].y;
for (i = 1; vec[i].code != ART_END; i++)
{
if (vec[i].x < x0) x0 = vec[i].x;
if (vec[i].x > x1) x1 = vec[i].x;
if (vec[i].y < y0) y0 = vec[i].y;
if (vec[i].y > y1) y1 = vec[i].y;
}
}
drect->x0 = x0;
drect->y0 = y0;
drect->x1 = x1;
drect->y1 = y1;
}
/**
* art_vpath_bbox_irect: Determine integer bounding box of vpath.
* @vec: Source vpath.
* idrect: Where to store bounding box.
*
* Determines integer bounding box of @vec, and stores it in @irect.
**/
void
art_vpath_bbox_irect (const ArtVpath *vec, ArtIRect *irect)
{
ArtDRect drect;
art_vpath_bbox_drect (vec, &drect);
art_drect_to_irect (irect, &drect);
}
#define PERTURBATION 2e-3
/**
* art_vpath_perturb: Perturb each point in vpath by small random amount.
* @src: Source vpath.
*
* Perturbs each of the points by a small random amount. This is
* helpful for cheating in cases when algorithms haven't attained
* numerical stability yet.
*
* Return value: Newly allocated vpath containing perturbed @src.
**/
ArtVpath *
art_vpath_perturb (ArtVpath *src)
{
int i;
int size;
ArtVpath *new;
double x, y;
double x_start, y_start;
int open;
for (i = 0; src[i].code != ART_END; i++);
size = i;
new = art_new (ArtVpath, size + 1);
x_start = 0;
y_start = 0;
open = 0;
for (i = 0; i < size; i++)
{
new[i].code = src[i].code;
x = src[i].x + (PERTURBATION * rand ()) / RAND_MAX - PERTURBATION * 0.5;
y = src[i].y + (PERTURBATION * rand ()) / RAND_MAX - PERTURBATION * 0.5;
if (src[i].code == ART_MOVETO)
{
x_start = x;
y_start = y;
open = 0;
}
else if (src[i].code == ART_MOVETO_OPEN)
open = 1;
if (!open && (i + 1 == size || src[i + 1].code != ART_LINETO))
{
x = x_start;
y = y_start;
}
new[i].x = x;
new[i].y = y;
}
new[i].code = ART_END;
return new;
}

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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_VPATH_H__
#define __ART_VPATH_H__
#ifdef LIBART_COMPILATION
#include "art_rect.h"
#include "art_pathcode.h"
#else
#include <libart_lgpl/art_rect.h>
#include <libart_lgpl/art_pathcode.h>
#endif
/* Basic data structures and constructors for simple vector paths */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef struct _ArtVpath ArtVpath;
/* CURVETO is not allowed! */
struct _ArtVpath {
ArtPathcode code;
double x;
double y;
};
/* Some of the functions need to go into their own modules */
void
art_vpath_add_point (ArtVpath **p_vpath, int *pn_points, int *pn_points_max,
ArtPathcode code, double x, double y);
ArtVpath *
art_vpath_new_circle (double x, double y, double r);
ArtVpath *
art_vpath_affine_transform (const ArtVpath *src, const double matrix[6]);
void
art_vpath_bbox_drect (const ArtVpath *vec, ArtDRect *drect);
void
art_vpath_bbox_irect (const ArtVpath *vec, ArtIRect *irect);
ArtVpath *
art_vpath_perturb (ArtVpath *src);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_VPATH_H__ */

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other-licenses/libart_lgpl/art_vpath_bpath.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Basic constructors and operations for bezier paths */
#include <math.h>
#include "art_misc.h"
#include "art_bpath.h"
#include "art_vpath.h"
#include "art_vpath_bpath.h"
/* p must be allocated 2^level points. */
/* level must be >= 1 */
ArtPoint *
art_bezier_to_vec (double x0, double y0,
double x1, double y1,
double x2, double y2,
double x3, double y3,
ArtPoint *p,
int level)
{
double x_m, y_m;
#ifdef VERBOSE
printf ("bezier_to_vec: %g,%g %g,%g %g,%g %g,%g %d\n",
x0, y0, x1, y1, x2, y2, x3, y3, level);
#endif
if (level == 1) {
x_m = (x0 + 3 * (x1 + x2) + x3) * 0.125;
y_m = (y0 + 3 * (y1 + y2) + y3) * 0.125;
p->x = x_m;
p->y = y_m;
p++;
p->x = x3;
p->y = y3;
p++;
#ifdef VERBOSE
printf ("-> (%g, %g) -> (%g, %g)\n", x_m, y_m, x3, y3);
#endif
} else {
double xa1, ya1;
double xa2, ya2;
double xb1, yb1;
double xb2, yb2;
xa1 = (x0 + x1) * 0.5;
ya1 = (y0 + y1) * 0.5;
xa2 = (x0 + 2 * x1 + x2) * 0.25;
ya2 = (y0 + 2 * y1 + y2) * 0.25;
xb1 = (x1 + 2 * x2 + x3) * 0.25;
yb1 = (y1 + 2 * y2 + y3) * 0.25;
xb2 = (x2 + x3) * 0.5;
yb2 = (y2 + y3) * 0.5;
x_m = (xa2 + xb1) * 0.5;
y_m = (ya2 + yb1) * 0.5;
#ifdef VERBOSE
printf ("%g,%g %g,%g %g,%g %g,%g\n", xa1, ya1, xa2, ya2,
xb1, yb1, xb2, yb2);
#endif
p = art_bezier_to_vec (x0, y0, xa1, ya1, xa2, ya2, x_m, y_m, p, level - 1);
p = art_bezier_to_vec (x_m, y_m, xb1, yb1, xb2, yb2, x3, y3, p, level - 1);
}
return p;
}
#define RENDER_LEVEL 4
#define RENDER_SIZE (1 << (RENDER_LEVEL))
/**
* art_vpath_render_bez: Render a bezier segment into the vpath.
* @p_vpath: Where the pointer to the #ArtVpath structure is stored.
* @pn_points: Pointer to the number of points in *@p_vpath.
* @pn_points_max: Pointer to the number of points allocated.
* @x0: X coordinate of starting bezier point.
* @y0: Y coordinate of starting bezier point.
* @x1: X coordinate of first bezier control point.
* @y1: Y coordinate of first bezier control point.
* @x2: X coordinate of second bezier control point.
* @y2: Y coordinate of second bezier control point.
* @x3: X coordinate of ending bezier point.
* @y3: Y coordinate of ending bezier point.
* @flatness: Flatness control.
*
* Renders a bezier segment into the vector path, reallocating and
* updating *@p_vpath and *@pn_vpath_max as necessary. *@pn_vpath is
* incremented by the number of vector points added.
*
* This step includes (@x0, @y0) but not (@x3, @y3).
*
* The @flatness argument guides the amount of subdivision. The Adobe
* PostScript reference manual defines flatness as the maximum
* deviation between the any point on the vpath approximation and the
* corresponding point on the "true" curve, and we follow this
* definition here. A value of 0.25 should ensure high quality for aa
* rendering.
**/
static void
art_vpath_render_bez (ArtVpath **p_vpath, int *pn, int *pn_max,
double x0, double y0,
double x1, double y1,
double x2, double y2,
double x3, double y3,
double flatness)
{
double x3_0, y3_0;
double z3_0_dot;
double z1_dot, z2_dot;
double z1_perp, z2_perp;
double max_perp_sq;
double x_m, y_m;
double xa1, ya1;
double xa2, ya2;
double xb1, yb1;
double xb2, yb2;
/* It's possible to optimize this routine a fair amount.
First, once the _dot conditions are met, they will also be met in
all further subdivisions. So we might recurse to a different
routine that only checks the _perp conditions.
Second, the distance _should_ decrease according to fairly
predictable rules (a factor of 4 with each subdivision). So it might
be possible to note that the distance is within a factor of 4 of
acceptable, and subdivide once. But proving this might be hard.
Third, at the last subdivision, x_m and y_m can be computed more
expeditiously (as in the routine above).
Finally, if we were able to subdivide by, say 2 or 3, this would
allow considerably finer-grain control, i.e. fewer points for the
same flatness tolerance. This would speed things up downstream.
In any case, this routine is unlikely to be the bottleneck. It's
just that I have this undying quest for more speed...
*/
x3_0 = x3 - x0;
y3_0 = y3 - y0;
/* z3_0_dot is dist z0-z3 squared */
z3_0_dot = x3_0 * x3_0 + y3_0 * y3_0;
/* todo: this test is far from satisfactory. */
if (z3_0_dot < 0.001)
goto nosubdivide;
/* we can avoid subdivision if:
z1 has distance no more than flatness from the z0-z3 line
z1 is no more z0'ward than flatness past z0-z3
z1 is more z0'ward than z3'ward on the line traversing z0-z3
and correspondingly for z2 */
/* perp is distance from line, multiplied by dist z0-z3 */
max_perp_sq = flatness * flatness * z3_0_dot;
z1_perp = (y1 - y0) * x3_0 - (x1 - x0) * y3_0;
if (z1_perp * z1_perp > max_perp_sq)
goto subdivide;
z2_perp = (y3 - y2) * x3_0 - (x3 - x2) * y3_0;
if (z2_perp * z2_perp > max_perp_sq)
goto subdivide;
z1_dot = (x1 - x0) * x3_0 + (y1 - y0) * y3_0;
if (z1_dot < 0 && z1_dot * z1_dot > max_perp_sq)
goto subdivide;
z2_dot = (x3 - x2) * x3_0 + (y3 - y2) * y3_0;
if (z2_dot < 0 && z2_dot * z2_dot > max_perp_sq)
goto subdivide;
if (z1_dot + z1_dot > z3_0_dot)
goto subdivide;
if (z2_dot + z2_dot > z3_0_dot)
goto subdivide;
nosubdivide:
/* don't subdivide */
art_vpath_add_point (p_vpath, pn, pn_max,
ART_LINETO, x3, y3);
return;
subdivide:
xa1 = (x0 + x1) * 0.5;
ya1 = (y0 + y1) * 0.5;
xa2 = (x0 + 2 * x1 + x2) * 0.25;
ya2 = (y0 + 2 * y1 + y2) * 0.25;
xb1 = (x1 + 2 * x2 + x3) * 0.25;
yb1 = (y1 + 2 * y2 + y3) * 0.25;
xb2 = (x2 + x3) * 0.5;
yb2 = (y2 + y3) * 0.5;
x_m = (xa2 + xb1) * 0.5;
y_m = (ya2 + yb1) * 0.5;
#ifdef VERBOSE
printf ("%g,%g %g,%g %g,%g %g,%g\n", xa1, ya1, xa2, ya2,
xb1, yb1, xb2, yb2);
#endif
art_vpath_render_bez (p_vpath, pn, pn_max,
x0, y0, xa1, ya1, xa2, ya2, x_m, y_m, flatness);
art_vpath_render_bez (p_vpath, pn, pn_max,
x_m, y_m, xb1, yb1, xb2, yb2, x3, y3, flatness);
}
/**
* art_bez_path_to_vec: Create vpath from bezier path.
* @bez: Bezier path.
* @flatness: Flatness control.
*
* Creates a vector path closely approximating the bezier path defined by
* @bez. The @flatness argument controls the amount of subdivision. In
* general, the resulting vpath deviates by at most @flatness pixels
* from the "ideal" path described by @bez.
*
* Return value: Newly allocated vpath.
**/
ArtVpath *
art_bez_path_to_vec (const ArtBpath *bez, double flatness)
{
ArtVpath *vec;
int vec_n, vec_n_max;
int bez_index;
double x, y;
vec_n = 0;
vec_n_max = RENDER_SIZE;
vec = art_new (ArtVpath, vec_n_max);
/* Initialization is unnecessary because of the precondition that the
bezier path does not begin with LINETO or CURVETO, but is here
to make the code warning-free. */
x = 0;
y = 0;
bez_index = 0;
do
{
#ifdef VERBOSE
printf ("%s %g %g\n",
bez[bez_index].code == ART_CURVETO ? "curveto" :
bez[bez_index].code == ART_LINETO ? "lineto" :
bez[bez_index].code == ART_MOVETO ? "moveto" :
bez[bez_index].code == ART_MOVETO_OPEN ? "moveto-open" :
"end", bez[bez_index].x3, bez[bez_index].y3);
#endif
/* make sure space for at least one more code */
if (vec_n >= vec_n_max)
art_expand (vec, ArtVpath, vec_n_max);
switch (bez[bez_index].code)
{
case ART_MOVETO_OPEN:
case ART_MOVETO:
case ART_LINETO:
x = bez[bez_index].x3;
y = bez[bez_index].y3;
vec[vec_n].code = bez[bez_index].code;
vec[vec_n].x = x;
vec[vec_n].y = y;
vec_n++;
break;
case ART_END:
vec[vec_n].code = bez[bez_index].code;
vec[vec_n].x = 0;
vec[vec_n].y = 0;
vec_n++;
break;
case ART_CURVETO:
#ifdef VERBOSE
printf ("%g,%g %g,%g %g,%g %g,%g\n", x, y,
bez[bez_index].x1, bez[bez_index].y1,
bez[bez_index].x2, bez[bez_index].y2,
bez[bez_index].x3, bez[bez_index].y3);
#endif
art_vpath_render_bez (&vec, &vec_n, &vec_n_max,
x, y,
bez[bez_index].x1, bez[bez_index].y1,
bez[bez_index].x2, bez[bez_index].y2,
bez[bez_index].x3, bez[bez_index].y3,
flatness);
x = bez[bez_index].x3;
y = bez[bez_index].y3;
break;
}
}
while (bez[bez_index++].code != ART_END);
return vec;
}

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other-licenses/libart_lgpl/art_vpath_bpath.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_VPATH_BPATH_H__
#define __ART_VPATH_BPATH_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
ArtPoint *art_bezier_to_vec (double x0, double y0,
double x1, double y1,
double x2, double y2,
double x3, double y3,
ArtPoint *p,
int level);
ArtVpath *art_bez_path_to_vec (const ArtBpath *bez, double flatness);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_VPATH_BPATH_H__ */

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other-licenses/libart_lgpl/art_vpath_dash.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1999-2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Apply a dash style to a vector path. */
#include <math.h>
#include <stdlib.h>
#include "art_misc.h"
#include "art_vpath.h"
#include "art_vpath_dash.h"
/* Return the length of the largest subpath within vpath */
static int
art_vpath_dash_max_subpath (const ArtVpath *vpath)
{
int max_subpath;
int i;
int start;
max_subpath = 0;
start = 0;
for (i = 0; vpath[i].code != ART_END; i++)
{
if (vpath[i].code == ART_MOVETO || vpath[i].code == ART_MOVETO_OPEN)
{
if (i - start > max_subpath)
max_subpath = i - start;
start = i;
}
}
if (i - start > max_subpath)
max_subpath = i - start;
return max_subpath;
}
/**
* art_vpath_dash: Add dash style to vpath.
* @vpath: Original vpath.
* @dash: Dash style.
*
* Creates a new vpath that is the result of applying dash style @dash
* to @vpath.
*
* This implementation has two known flaws:
*
* First, it adds a spurious break at the beginning of the vpath. The
* only way I see to resolve this flaw is to run the state forward one
* dash break at the beginning, and fix up by looping back to the
* first dash break at the end. This is doable but of course adds some
* complexity.
*
* Second, it does not suppress output points that are within epsilon
* of each other.
*
* Return value: Newly created vpath.
**/
ArtVpath *
art_vpath_dash (const ArtVpath *vpath, const ArtVpathDash *dash)
{
int max_subpath;
double *dists;
ArtVpath *result;
int n_result, n_result_max;
int start, end;
int i;
double total_dist;
/* state while traversing dasharray - offset is offset of current dash
value, toggle is 0 for "off" and 1 for "on", and phase is the distance
in, >= 0, < dash->dash[offset]. */
int offset, toggle;
double phase;
/* initial values */
int offset_init, toggle_init;
double phase_init;
max_subpath = art_vpath_dash_max_subpath (vpath);
dists = art_new (double, max_subpath);
n_result = 0;
n_result_max = 16;
result = art_new (ArtVpath, n_result_max);
/* determine initial values of dash state */
toggle_init = 1;
offset_init = 0;
phase_init = dash->offset;
while (phase_init >= dash->dash[offset_init])
{
toggle_init = !toggle_init;
phase_init -= dash->dash[offset_init];
offset_init++;
if (offset_init == dash->n_dash)
offset_init = 0;
}
for (start = 0; vpath[start].code != ART_END; start = end)
{
for (end = start + 1; vpath[end].code == ART_LINETO; end++);
/* subpath is [start..end) */
total_dist = 0;
for (i = start; i < end - 1; i++)
{
double dx, dy;
dx = vpath[i + 1].x - vpath[i].x;
dy = vpath[i + 1].y - vpath[i].y;
dists[i - start] = sqrt (dx * dx + dy * dy);
total_dist += dists[i - start];
}
if (total_dist <= dash->dash[offset_init] - phase_init)
{
/* subpath fits entirely within first dash */
if (toggle_init)
{
for (i = start; i < end; i++)
art_vpath_add_point (&result, &n_result, &n_result_max,
vpath[i].code, vpath[i].x, vpath[i].y);
}
}
else
{
/* subpath is composed of at least one dash - thus all
generated pieces are open */
double dist;
phase = phase_init;
offset = offset_init;
toggle = toggle_init;
dist = 0;
i = start;
if (toggle)
art_vpath_add_point (&result, &n_result, &n_result_max,
ART_MOVETO_OPEN, vpath[i].x, vpath[i].y);
while (i != end - 1)
{
if (dists[i - start] - dist > dash->dash[offset] - phase)
{
/* dash boundary is next */
double a;
double x, y;
dist += dash->dash[offset] - phase;
a = dist / dists[i - start];
x = vpath[i].x + a * (vpath[i + 1].x - vpath[i].x);
y = vpath[i].y + a * (vpath[i + 1].y - vpath[i].y);
art_vpath_add_point (&result, &n_result, &n_result_max,
toggle ? ART_LINETO : ART_MOVETO_OPEN,
x, y);
/* advance to next dash */
toggle = !toggle;
phase = 0;
offset++;
if (offset == dash->n_dash)
offset = 0;
}
else
{
/* end of line in vpath is next */
phase += dists[i - start] - dist;
i++;
dist = 0;
if (toggle)
art_vpath_add_point (&result, &n_result, &n_result_max,
ART_LINETO, vpath[i].x, vpath[i].y);
}
}
}
}
art_vpath_add_point (&result, &n_result, &n_result_max,
ART_END, 0, 0);
art_free (dists);
return result;
}

44
other-licenses/libart_lgpl/art_vpath_dash.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1999 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_VPATH_DASH_H__
#define __ART_VPATH_DASH_H__
/* Apply a dash style to a vector path. */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef struct _ArtVpathDash ArtVpathDash;
struct _ArtVpathDash {
double offset;
int n_dash;
double *dash;
};
ArtVpath *
art_vpath_dash (const ArtVpath *vpath, const ArtVpathDash *dash);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_VPATH_DASH_H__ */

194
other-licenses/libart_lgpl/art_vpath_svp.c Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998-2000 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* "Unsort" a sorted vector path into an ordinary vector path. */
#include <stdio.h> /* for printf - debugging */
#include "art_misc.h"
#include "art_vpath.h"
#include "art_svp.h"
#include "art_vpath_svp.h"
typedef struct _ArtVpathSVPEnd ArtVpathSVPEnd;
struct _ArtVpathSVPEnd {
int seg_num;
int which; /* 0 = top, 1 = bottom */
double x, y;
};
#define EPSILON 1e-6
static int
art_vpath_svp_point_compare (double x1, double y1, double x2, double y2)
{
if (y1 - EPSILON > y2) return 1;
if (y1 + EPSILON < y2) return -1;
if (x1 - EPSILON > x2) return 1;
if (x1 + EPSILON < x2) return -1;
return 0;
}
static int
art_vpath_svp_compare (const void *s1, const void *s2)
{
const ArtVpathSVPEnd *e1 = s1;
const ArtVpathSVPEnd *e2 = s2;
return art_vpath_svp_point_compare (e1->x, e1->y, e2->x, e2->y);
}
/* Convert from sorted vector path representation into regular
vector path representation.
Status of this routine:
Basic correctness: Only works with closed paths.
Numerical stability: Not known to work when more than two segments
meet at a point.
Speed: Should be pretty good.
Precision: Does not degrade precision.
*/
/**
* art_vpath_from_svp: Convert from svp to vpath form.
* @svp: Original #ArtSVP.
*
* Converts the sorted vector path @svp into standard vpath form.
*
* Return value: the newly allocated vpath.
**/
ArtVpath *
art_vpath_from_svp (const ArtSVP *svp)
{
int n_segs = svp->n_segs;
ArtVpathSVPEnd *ends;
ArtVpath *new;
int *visited;
int n_new, n_new_max;
int i, k;
int j = 0; /* Quiet compiler */
int seg_num;
int first;
double last_x, last_y;
int n_points;
int pt_num;
last_x = 0; /* to eliminate "uninitialized" warning */
last_y = 0;
ends = art_new (ArtVpathSVPEnd, n_segs * 2);
for (i = 0; i < svp->n_segs; i++)
{
int lastpt;
ends[i * 2].seg_num = i;
ends[i * 2].which = 0;
ends[i * 2].x = svp->segs[i].points[0].x;
ends[i * 2].y = svp->segs[i].points[0].y;
lastpt = svp->segs[i].n_points - 1;
ends[i * 2 + 1].seg_num = i;
ends[i * 2 + 1].which = 1;
ends[i * 2 + 1].x = svp->segs[i].points[lastpt].x;
ends[i * 2 + 1].y = svp->segs[i].points[lastpt].y;
}
qsort (ends, n_segs * 2, sizeof (ArtVpathSVPEnd), art_vpath_svp_compare);
n_new = 0;
n_new_max = 16; /* I suppose we _could_ estimate this from traversing
the svp, so we don't have to reallocate */
new = art_new (ArtVpath, n_new_max);
visited = art_new (int, n_segs);
for (i = 0; i < n_segs; i++)
visited[i] = 0;
first = 1;
for (i = 0; i < n_segs; i++)
{
if (!first)
{
/* search for the continuation of the existing subpath */
/* This could be a binary search (which is why we sorted, above) */
for (j = 0; j < n_segs * 2; j++)
{
if (!visited[ends[j].seg_num] &&
art_vpath_svp_point_compare (last_x, last_y,
ends[j].x, ends[j].y) == 0)
break;
}
if (j == n_segs * 2)
first = 1;
}
if (first)
{
/* start a new subpath */
for (j = 0; j < n_segs * 2; j++)
if (!visited[ends[j].seg_num])
break;
}
if (j == n_segs * 2)
{
printf ("failure\n");
}
seg_num = ends[j].seg_num;
n_points = svp->segs[seg_num].n_points;
for (k = 0; k < n_points; k++)
{
pt_num = svp->segs[seg_num].dir ? k : n_points - (1 + k);
if (k == 0)
{
if (first)
{
art_vpath_add_point (&new, &n_new, &n_new_max,
ART_MOVETO,
svp->segs[seg_num].points[pt_num].x,
svp->segs[seg_num].points[pt_num].y);
}
}
else
{
art_vpath_add_point (&new, &n_new, &n_new_max,
ART_LINETO,
svp->segs[seg_num].points[pt_num].x,
svp->segs[seg_num].points[pt_num].y);
if (k == n_points - 1)
{
last_x = svp->segs[seg_num].points[pt_num].x;
last_y = svp->segs[seg_num].points[pt_num].y;
/* to make more robust, check for meeting first_[xy],
set first if so */
}
}
first = 0;
}
visited[seg_num] = 1;
}
art_vpath_add_point (&new, &n_new, &n_new_max,
ART_END, 0, 0);
art_free (visited);
art_free (ends);
return new;
}

43
other-licenses/libart_lgpl/art_vpath_svp.h Normal file
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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_VPATH_SVP_H__
#define __ART_VPATH_SVP_H__
/* "Unsort" a sorted vector path into an ordinary vector path. */
#ifdef LIBART_COMPILATION
#include "art_rect.h"
#include "art_point.h"
#else
#include <libart_lgpl/art_rect.h>
#include <libart_lgpl/art_point.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
ArtVpath *art_vpath_from_svp (const ArtSVP *svp);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_VPATH_SVP_H__ */

63
other-licenses/libart_lgpl/autogen.sh Executable file
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#!/bin/sh
# Run this to generate all the initial makefiles, etc.
# This was lifted from the Gimp, and adapted slightly by
# Raph Levien <raph@acm.org>.
DIE=0
srcdir=`dirname $0`
test -z "$srcdir" && srcdir=.
PROJECT=LibArt_LGPL
(autoconf --version) < /dev/null > /dev/null 2>&1 || {
echo
echo "You must have autoconf installed to compile $PROJECT."
echo "Download the appropriate package for your distribution,"
echo "or get the source tarball at ftp://ftp.gnu.org/pub/gnu/"
DIE=1
}
# Do we really need libtool?
(libtool --version) < /dev/null > /dev/null 2>&1 || {
echo
echo "You must have libtool installed to compile $PROJECT."
echo "Get ftp://ftp.gnu.org/pub/gnu/libtool-1.2.tar.gz"
echo "(or a newer version if it is available)"
DIE=1
}
(automake --version) < /dev/null > /dev/null 2>&1 || {
echo
echo "You must have automake installed to compile $PROJECT."
echo "Get ftp://ftp.gnu.org/pub/gnu/automake-1.3.tar.gz"
echo "(or a newer version if it is available)"
DIE=1
}
if test "$DIE" -eq 1; then
exit 1
fi
if test -z "$*"; then
echo "I am going to run ./configure with no arguments - if you wish "
echo "to pass any to it, please specify them on the $0 command line."
fi
case $CC in
xlc )
am_opt=--include-deps;;
esac
for dir in $srcdir
do
echo processing $dir
(cd $dir; \
aclocalinclude="$ACLOCAL_FLAGS"; \
aclocal $aclocalinclude; \
autoheader; automake --add-missing --gnu $am_opt; autoconf)
done
$srcdir/configure "$@"
echo
echo "Now type 'make' to compile $PROJECT."

69
other-licenses/libart_lgpl/configure.in Normal file
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AC_INIT(art_misc.h)
AM_CONFIG_HEADER(config.h)
LIBART_MAJOR_VERSION=2
LIBART_MINOR_VERSION=3
LIBART_MICRO_VERSION=7
LIBART_VERSION=$LIBART_MAJOR_VERSION.$LIBART_MINOR_VERSION.$LIBART_MICRO_VERSION
LIBART_VERSION_INFO=`expr $LIBART_MAJOR_VERSION + $LIBART_MINOR_VERSION`:$LIBART_MICRO_VERSION:$LIBART_MINOR_VERSION
AC_SUBST(LIBART_MAJOR_VERSION)
AC_SUBST(LIBART_MINOR_VERSION)
AC_SUBST(LIBART_MICRO_VERSION)
AC_SUBST(LIBART_VERSION)
AC_SUBST(LIBART_VERSION_INFO)
VERSION=$LIBART_VERSION
AM_INIT_AUTOMAKE(libart_lgpl, $VERSION)
AC_ARG_ENABLE(ansi, [ --enable-ansi turn on strict ansi [default=no]],
, enable_ansi=no)
AC_PROG_CC
AC_PROG_CPP
AM_PROG_LIBTOOL
AM_MAINTAINER_MODE
changequote(,)dnl
if test "x$GCC" = "xyes"; then
case " $CFLAGS " in
*[\ \ ]-Wall[\ \ ]*) ;;
*) CFLAGS="$CFLAGS -Wall" ;;
esac
case " $CFLAGS " in
*[\ \ ]-Wmissing-prototypes[\ \ ]*) ;;
*) CFLAGS="$CFLAGS -Wmissing-prototypes" ;;
esac
if test "x$enable_ansi" = "xyes"; then
case " $CFLAGS " in
*[\ \ ]-ansi[\ \ ]*) ;;
*) CFLAGS="$CFLAGS -ansi" ;;
esac
case " $CFLAGS " in
*[\ \ ]-pedantic[\ \ ]*) ;;
*) CFLAGS="$CFLAGS -pedantic" ;;
esac
fi
fi
changequote([,])dnl
LIBART_LIBDIR='-L${libdir}'
LIBART_INCLUDEDIR='-I${includedir}'
LIBART_LIBS='-lart_lgpl'
AC_SUBST(LIBART_LIBDIR)
AC_SUBST(LIBART_INCLUDEDIR)
AC_SUBST(LIBART_LIBS)
AC_C_BIGENDIAN
AC_OUTPUT([
libart-features.h
Makefile
libart-config
libart-2.0.pc], [case "$CONFIG_FILES" in *libart-config*) chmod +x libart-config;; esac])

52
other-licenses/libart_lgpl/gen_art_config.c Normal file
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#include <stdio.h>
#include "config.h"
#include <stdlib.h>
/**
* A little utility function to generate header info.
*
* Yes, it would be possible to do this using more "native" autoconf
* features, but I personally find this approach to be cleaner.
*
* The output of this program is generally written to art_config.h,
* which is installed in libart's include dir.
**/
static void
die (char *why)
{
fprintf (stderr, "gen_art_config: %s\n", why);
exit (1);
}
int
main (int argc, char **argv)
{
printf ("/* Automatically generated by gen_art_config.c */\n"
"\n"
"#define ART_SIZEOF_CHAR %d\n"
"#define ART_SIZEOF_SHORT %d\n"
"#define ART_SIZEOF_INT %d\n"
"#define ART_SIZEOF_LONG %d\n"
"\n",
(int)sizeof(char), (int)sizeof(short), (int)sizeof(int), (int)sizeof(long));
if (sizeof(char) == 1)
printf ("typedef unsigned char art_u8;\n");
else
die ("sizeof(char) != 1");
if (sizeof(short) == 2)
printf ("typedef unsigned short art_u16;\n");
else
die ("sizeof(short) != 2");
if (sizeof(int) == 4)
printf ("typedef unsigned int art_u32;\n");
else if (sizeof(long) == 4)
printf ("typedef unsigned long art_u32;\n");
else
die ("sizeof(int) != 4 and sizeof(long) != 4");
return 0;
}

10
other-licenses/libart_lgpl/libart-2.0.pc.in Normal file
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@ -0,0 +1,10 @@
prefix=@prefix@
exec_prefix=@exec_prefix@
libdir=@libdir@
includedir=@includedir@
Name: libart
Description: LGPL version of the libart library
Version: @VERSION@
Libs: -L${libdir} -lart_lgpl_2
Cflags: -I${includedir}/libart-2.0

56
other-licenses/libart_lgpl/libart-config.in Normal file
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@ -0,0 +1,56 @@
#!/bin/sh
prefix=@prefix@
exec_prefix=@exec_prefix@
exec_prefix_set=no
usage="\
Usage: libart-config [--prefix[=DIR]] [--exec-prefix[=DIR]] [--version] [--libs] [--cflags]"
if test $# -eq 0; then
echo "${usage}" 1>&2
exit 1
fi
while test $# -gt 0; do
case "$1" in
-*=*) optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
*) optarg= ;;
esac
case $1 in
--prefix=*)
prefix=$optarg
if test $exec_prefix_set = no ; then
exec_prefix=$optarg
fi
;;
--prefix)
echo $prefix
;;
--exec-prefix=*)
exec_prefix=$optarg
exec_prefix_set=yes
;;
--exec-prefix)
echo $exec_prefix
;;
--version)
echo @LIBART_VERSION@
;;
--cflags)
includes=-I@includedir@/libart-2.0
echo $includes
;;
--libs)
libdirs=-L@libdir@
echo $libdirs -lart_lgpl_2 -lm
;;
*)
echo "${usage}" 1>&2
exit 1
;;
esac
shift
done

18
other-licenses/libart_lgpl/libart-features.c Normal file
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@ -0,0 +1,18 @@
#include "libart-features.h"
/* General initialization hooks */
const unsigned int libart_major_version=LIBART_MAJOR_VERSION,
libart_minor_version=LIBART_MINOR_VERSION,
libart_micro_version=LIBART_MICRO_VERSION;
const char *libart_version = LIBART_VERSION;
void
libart_preinit(void *app, void *modinfo)
{
}
void
libart_postinit(void *app, void *modinfo)
{
}

14
other-licenses/libart_lgpl/libart-features.h.in Normal file
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@ -0,0 +1,14 @@
#ifndef LIBART_FEATURES_H
#define LIBART_FEATURES_H 1
#define LIBART_MAJOR_VERSION (@LIBART_MAJOR_VERSION@)
#define LIBART_MINOR_VERSION (@LIBART_MINOR_VERSION@)
#define LIBART_MICRO_VERSION (@LIBART_MICRO_VERSION@)
#define LIBART_VERSION "@LIBART_VERSION@"
extern const unsigned int libart_major_version, libart_minor_version, libart_micro_version;
extern const char *libart_version;
void libart_preinit(void *app, void *modinfo);
void libart_postinit(void *app, void *modinfo);
#endif

93
other-licenses/libart_lgpl/libart.def Normal file
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; libart.def : Declares the funcion exports of the DLL.
LIBRARY "libart"
DESCRIPTION 'libart Windows Dynamic Link Library'
EXPORTS
art_affine_equal
art_affine_expansion
art_affine_flip
art_affine_identity
art_affine_invert
art_affine_multiply
art_affine_point
art_affine_rectilinear
art_affine_rotate
art_affine_scale
art_affine_shear
art_affine_to_string
art_affine_translate
art_alphagamma_free
art_alphagamma_new
art_bez_path_to_vec
art_bezier_to_vec
art_bpath_affine_transform
art_die
art_drect_affine_transform
art_drect_copy
art_drect_empty
art_drect_intersect
art_drect_svp
art_drect_svp_union
art_drect_to_irect
art_drect_union
art_gray_svp_aa
art_irect_copy
art_irect_empty
art_irect_intersect
art_irect_union
art_pixbuf_duplicate
art_pixbuf_free
art_pixbuf_free_shallow
art_pixbuf_new_const_rgb
art_pixbuf_new_const_rgba
art_pixbuf_new_rgb
art_pixbuf_new_rgb_dnotify
art_pixbuf_new_rgba
art_pixbuf_new_rgba_dnotify
art_rect_list_from_uta
art_rgba_rgba_composite
art_rgba_fill_run
art_rgba_run_alpha
art_rgb_affine
art_rgb_affine_run
art_rgb_bitmap_affine
art_rgb_fill_run
art_rgb_pixbuf_affine
art_rgb_rgba_affine
art_rgb_run_alpha
art_rgb_svp_aa
art_rgb_svp_alpha
art_svp_add_segment
art_svp_diff
art_svp_free
art_svp_from_vpath
art_svp_intersect
art_svp_point_dist
art_svp_point_wind
art_svp_render_aa
art_svp_rewind_uncrossed
art_svp_seg_compare
art_svp_uncross
art_svp_union
art_svp_vpath_stroke
art_svp_vpath_stroke_raw
art_uta_add_line
art_uta_free
art_uta_from_irect
art_uta_from_svp
art_uta_from_vpath
art_uta_new
art_uta_new_coords
art_uta_union
art_vpath_add_point
art_vpath_affine_transform
art_vpath_bbox_drect
art_vpath_bbox_irect
art_vpath_dash
art_vpath_from_svp
art_vpath_new_circle
art_vpath_perturb
art_warn
; trap_epsilon
; traverse

39
other-licenses/libart_lgpl/libart.h Normal file
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@ -0,0 +1,39 @@
#ifndef LIBART_H
#define LIBART_H 1
#include <libart_lgpl/art_affine.h>
#include <libart_lgpl/art_alphagamma.h>
#include <libart_lgpl/art_bpath.h>
#include <libart_lgpl/art_filterlevel.h>
#include <libart_lgpl/art_gray_svp.h>
#include <libart_lgpl/art_misc.h>
#include <libart_lgpl/art_pathcode.h>
#include <libart_lgpl/art_pixbuf.h>
#include <libart_lgpl/art_point.h>
#include <libart_lgpl/art_rect.h>
#include <libart_lgpl/art_rect_svp.h>
#include <libart_lgpl/art_rect_uta.h>
#include <libart_lgpl/art_rgb.h>
#include <libart_lgpl/art_rgb_affine.h>
#include <libart_lgpl/art_rgb_bitmap_affine.h>
#include <libart_lgpl/art_rgb_pixbuf_affine.h>
#include <libart_lgpl/art_rgb_rgba_affine.h>
#include <libart_lgpl/art_rgb_svp.h>
#include <libart_lgpl/art_svp.h>
#include <libart_lgpl/art_svp_ops.h>
#include <libart_lgpl/art_svp_point.h>
#include <libart_lgpl/art_svp_render_aa.h>
#include <libart_lgpl/art_svp_vpath.h>
#include <libart_lgpl/art_svp_vpath_stroke.h>
#include <libart_lgpl/art_svp_wind.h>
#include <libart_lgpl/art_uta.h>
#include <libart_lgpl/art_uta_ops.h>
#include <libart_lgpl/art_uta_rect.h>
#include <libart_lgpl/art_uta_svp.h>
#include <libart_lgpl/art_uta_vpath.h>
#include <libart_lgpl/art_vpath.h>
#include <libart_lgpl/art_vpath_bpath.h>
#include <libart_lgpl/art_vpath_dash.h>
#include <libart_lgpl/art_vpath_svp.h>
#endif

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other-licenses/libart_lgpl/libart.m4 Normal file
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# Configure paths for LIBART
# Raph Levien 98-11-18
# stolen from Manish Singh 98-9-30
# stolen back from Frank Belew
# stolen from Manish Singh
# Shamelessly stolen from Owen Taylor
dnl AM_PATH_LIBART([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
dnl Test for LIBART, and define LIBART_CFLAGS and LIBART_LIBS
dnl
AC_DEFUN(AM_PATH_LIBART,
[dnl
dnl Get the cflags and libraries from the libart-config script
dnl
AC_ARG_WITH(libart-prefix,[ --with-libart-prefix=PFX Prefix where LIBART is installed (optional)],
libart_prefix="$withval", libart_prefix="")
AC_ARG_WITH(libart-exec-prefix,[ --with-libart-exec-prefix=PFX Exec prefix where LIBART is installed (optional)],
libart_exec_prefix="$withval", libart_exec_prefix="")
AC_ARG_ENABLE(libarttest, [ --disable-libarttest Do not try to compile and run a test LIBART program],
, enable_libarttest=yes)
if test x$libart_exec_prefix != x ; then
libart_args="$libart_args --exec-prefix=$libart_exec_prefix"
if test x${LIBART_CONFIG+set} != xset ; then
LIBART_CONFIG=$libart_exec_prefix/bin/libart-config
fi
fi
if test x$libart_prefix != x ; then
libart_args="$libart_args --prefix=$libart_prefix"
if test x${LIBART_CONFIG+set} != xset ; then
LIBART_CONFIG=$libart_prefix/bin/libart-config
fi
fi
AC_PATH_PROG(LIBART_CONFIG, libart-config, no)
min_libart_version=ifelse([$1], ,0.2.5,$1)
AC_MSG_CHECKING(for LIBART - version >= $min_libart_version)
no_libart=""
if test "$LIBART_CONFIG" = "no" ; then
no_libart=yes
else
LIBART_CFLAGS=`$LIBART_CONFIG $libartconf_args --cflags`
LIBART_LIBS=`$LIBART_CONFIG $libartconf_args --libs`
libart_major_version=`$LIBART_CONFIG $libart_args --version | \
sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
libart_minor_version=`$LIBART_CONFIG $libart_args --version | \
sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
libart_micro_version=`$LIBART_CONFIG $libart_config_args --version | \
sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
if test "x$enable_libarttest" = "xyes" ; then
ac_save_CFLAGS="$CFLAGS"
ac_save_LIBS="$LIBS"
CFLAGS="$CFLAGS $LIBART_CFLAGS"
LIBS="$LIBS $LIBART_LIBS"
dnl
dnl Now check if the installed LIBART is sufficiently new. (Also sanity
dnl checks the results of libart-config to some extent
dnl
rm -f conf.libarttest
AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libart_lgpl/libart.h>
char*
my_strdup (char *str)
{
char *new_str;
if (str)
{
new_str = malloc ((strlen (str) + 1) * sizeof(char));
strcpy (new_str, str);
}
else
new_str = NULL;
return new_str;
}
int main ()
{
int major, minor, micro;
char *tmp_version;
system ("touch conf.libarttest");
/* HP/UX 9 (%@#!) writes to sscanf strings */
tmp_version = my_strdup("$min_libart_version");
if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
printf("%s, bad version string\n", "$min_libart_version");
exit(1);
}
if (($libart_major_version > major) ||
(($libart_major_version == major) && ($libart_minor_version > minor)) ||
(($libart_major_version == major) && ($libart_minor_version == minor) && ($libart_micro_version >= micro)))
{
return 0;
}
else
{
printf("\n*** 'libart-config --version' returned %d.%d.%d, but the minimum version\n", $libart_major_version, $libart_minor_version, $libart_micro_version);
printf("*** of LIBART required is %d.%d.%d. If libart-config is correct, then it is\n", major, minor, micro);
printf("*** best to upgrade to the required version.\n");
printf("*** If libart-config was wrong, set the environment variable LIBART_CONFIG\n");
printf("*** to point to the correct copy of libart-config, and remove the file\n");
printf("*** config.cache before re-running configure\n");
return 1;
}
}
],, no_libart=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
CFLAGS="$ac_save_CFLAGS"
LIBS="$ac_save_LIBS"
fi
fi
if test "x$no_libart" = x ; then
AC_MSG_RESULT(yes)
ifelse([$2], , :, [$2])
else
AC_MSG_RESULT(no)
if test "$LIBART_CONFIG" = "no" ; then
echo "*** The libart-config script installed by LIBART could not be found"
echo "*** If LIBART was installed in PREFIX, make sure PREFIX/bin is in"
echo "*** your path, or set the LIBART_CONFIG environment variable to the"
echo "*** full path to libart-config."
else
if test -f conf.libarttest ; then
:
else
echo "*** Could not run LIBART test program, checking why..."
CFLAGS="$CFLAGS $LIBART_CFLAGS"
LIBS="$LIBS $LIBART_LIBS"
AC_TRY_LINK([
#include <stdio.h>
#include <libart_lgpl/libart.h>
], [ return 0; ],
[ echo "*** The test program compiled, but did not run. This usually means"
echo "*** that the run-time linker is not finding LIBART or finding the wrong"
echo "*** version of LIBART. If it is not finding LIBART, you'll need to set your"
echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
echo "*** to the installed location Also, make sure you have run ldconfig if that"
echo "*** is required on your system"
echo "***"
echo "*** If you have an old version installed, it is best to remove it, although"
echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
[ echo "*** The test program failed to compile or link. See the file config.log for the"
echo "*** exact error that occured. This usually means LIBART was incorrectly installed"
echo "*** or that you have moved LIBART since it was installed. In the latter case, you"
echo "*** may want to edit the libart-config script: $LIBART_CONFIG" ])
CFLAGS="$ac_save_CFLAGS"
LIBS="$ac_save_LIBS"
fi
fi
LIBART_CFLAGS=""
LIBART_LIBS=""
ifelse([$3], , :, [$3])
fi
AC_SUBST(LIBART_CFLAGS)
AC_SUBST(LIBART_LIBS)
rm -f conf.libarttest
])

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other-licenses/libart_lgpl/libartConf.sh.in Normal file
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#
# Configuration file for using the LIBART library in GNOME applications
#
LIBART_LIBDIR="@LIBART_LIBDIR@"
LIBART_LIBS="@LIBART_LIBS@"
LIBART_INCLUDEDIR="@LIBART_INCLUDEDIR@"

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other-licenses/libart_lgpl/makefile.msc Normal file
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PACKAGE = libart
PKG_CFLAGS = -I.. -DLIBART_COMPILATION
OBJECTS = \
art_affine.obj \
art_alphagamma.obj \
art_bpath.obj \
art_gray_svp.obj \
art_misc.obj \
art_pixbuf.obj \
art_rect.obj \
art_rect_svp.obj \
art_rect_uta.obj \
art_rgb.obj \
art_rgba.obj \
art_rgb_affine.obj \
art_rgb_affine_private.obj \
art_rgb_bitmap_affine.obj \
art_rgb_pixbuf_affine.obj \
art_rgb_rgba_affine.obj \
art_rgb_svp.obj \
art_svp.obj \
art_svp_ops.obj \
art_svp_point.obj \
art_svp_render_aa.obj \
art_svp_vpath.obj \
art_svp_vpath_stroke.obj \
art_svp_wind.obj \
art_uta.obj \
art_uta_ops.obj \
art_uta_rect.obj \
art_uta_svp.obj \
art_uta_vpath.obj \
art_vpath.obj \
art_vpath_bpath.obj \
art_vpath_dash.obj \
art_vpath_svp.obj \
testOBJECTS = \
testart.obj \
testuta.obj \
## common stuff
## compiler and linker switches
!IFNDEF DEBUG
# Full optimization:
OPTIMIZE = -Ox -MD
LINKDEBUG =
!ELSE
# Debugging:
OPTIMIZE = -Zi -MDd
LINKDEBUG = /debug
!ENDIF
# cl -? describes the options
CC = cl -G5 -GF $(OPTIMIZE) -W3 -nologo
# No general LDFLAGS needed
LDFLAGS = /link $(LINKDEBUG)
INSTALL = copy
CFLAGS = -I. -DHAVE_CONFIG_H
## targets
all : \
config.h \
art_config.h \
$(PACKAGE).dll
$(PACKAGE).dll : $(OBJECTS) $(PACKAGE).def
$(CC) $(CFLAGS) -LD -Fe$(PACKAGE).dll $(OBJECTS) user32.lib advapi32.lib wsock32.lib $(LDFLAGS) /def:$(PACKAGE).def
config.h: config.h.win32
copy config.h.win32 config.h
art_config.h : gen_art_config.exe
gen_art_config.exe > art_config.h
gen_art_config.exe : gen_art_config.obj
$(CC) $(CFLAGS) -Fegen_art_config.exe gen_art_config.obj user32.lib
.c.obj :
$(CC) $(CFLAGS) -GD -c $(PKG_CFLAGS) $<
clean:
del config.h
del *.exe
del *.obj
del *.dll
del *.lib
del *.err
del *.map
del *.sym
del *.exp
del *.lk1
del *.mk1
del *.pdb
del *.ilk

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