зеркало из https://github.com/mozilla/pjs.git
108 строки
4.0 KiB
C
108 строки
4.0 KiB
C
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is Novell code.
|
|
*
|
|
* The Initial Developer of the Original Code is Novell.
|
|
* Portions created by the Initial Developer are Copyright (C) 2006
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* rocallahan@novell.com
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#include "cairo-gdk-utils.h"
|
|
|
|
#include <stdlib.h>
|
|
|
|
#if HAVE_STDINT_H
|
|
#include <stdint.h>
|
|
#elif HAVE_INTTYPES_H
|
|
#include <inttypes.h>
|
|
#elif HAVE_SYS_INT_TYPES_H
|
|
#include <sys/int_types.h>
|
|
#endif
|
|
|
|
|
|
/* We have three basic strategies available:
|
|
1) 'direct': cr targets a native surface, and other conditions are met: we can
|
|
pass the underlying drawable directly to the callback
|
|
2) 'opaque': the image is opaque: we can create a temporary cairo native surface,
|
|
pass its underlying drawable to the callback, and paint the result
|
|
using cairo
|
|
3) 'default': create a temporary cairo native surface, fill with black, pass its
|
|
underlying drawable to the callback, copy the results to a cairo
|
|
image surface, repeat with a white background, update the on-black
|
|
image alpha values by comparing the two images, then paint the on-black
|
|
image using cairo
|
|
Sure would be nice to have an X extension to do 3 for us on the server...
|
|
*/
|
|
|
|
static cairo_bool_t
|
|
_convert_coord_to_short (double coord, short *v)
|
|
{
|
|
*v = (short)coord;
|
|
/* XXX allow some tolerance here? */
|
|
return *v == coord;
|
|
}
|
|
|
|
static cairo_bool_t
|
|
_convert_coord_to_unsigned_short (double coord, unsigned short *v)
|
|
{
|
|
*v = (unsigned short)coord;
|
|
/* XXX allow some tolerance here? */
|
|
return *v == coord;
|
|
}
|
|
|
|
|
|
void cairo_draw_with_gdk (cairo_t *cr,
|
|
cairo_gdk_drawing_callback callback,
|
|
void * closure,
|
|
unsigned int width, unsigned int height,
|
|
cairo_gdk_drawing_opacity_t is_opaque,
|
|
cairo_gdk_drawing_support_t capabilities,
|
|
cairo_gdk_drawing_result_t *result)
|
|
{
|
|
double device_offset_x, device_offset_y;
|
|
short offset_x = 0, offset_y = 0;
|
|
//cairo_surface_t * target = cairo_get_group_target (cr);
|
|
cairo_surface_t * target = cairo_get_target (cr);
|
|
cairo_matrix_t matrix;
|
|
|
|
cairo_surface_get_device_offset (target, &device_offset_x, &device_offset_y);
|
|
cairo_get_matrix (cr, &matrix);
|
|
|
|
_convert_coord_to_short (matrix.x0 + device_offset_x, &offset_x);
|
|
_convert_coord_to_short (matrix.y0 + device_offset_y, &offset_y);
|
|
|
|
cairo_surface_flush (target);
|
|
callback (closure, target, offset_x, offset_y, NULL, 0);
|
|
cairo_surface_mark_dirty (target);
|
|
}
|
|
|
|
|