зеркало из https://github.com/mozilla/pjs.git
511 строки
17 KiB
C++
511 строки
17 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Oracle Corporation code.
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*
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* The Initial Developer of the Original Code is Oracle Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Stuart Parmenter <pavlov@pavlov.net>
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* Vladimir Vukicevic <vladimir@pobox.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "gfxXlibSurface.h"
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#include "cairo.h"
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#include "cairo-xlib.h"
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#include "cairo-xlib-xrender.h"
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#include <X11/Xlibint.h> /* For XESetCloseDisplay */
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#include "nsTArray.h"
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#include "nsAlgorithm.h"
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#include "nsServiceManagerUtils.h"
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#include "nsIPrefService.h"
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#include "cairo-xlib-xrender.h"
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// Although the dimension parameters in the xCreatePixmapReq wire protocol are
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// 16-bit unsigned integers, the server's CreatePixmap returns BadAlloc if
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// either dimension cannot be represented by a 16-bit *signed* integer.
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#define XLIB_IMAGE_SIDE_SIZE_LIMIT 0x7fff
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gfxXlibSurface::gfxXlibSurface(Display *dpy, Drawable drawable, Visual *visual)
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: mPixmapTaken(PR_FALSE), mDisplay(dpy), mDrawable(drawable)
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{
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DoSizeQuery();
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cairo_surface_t *surf = cairo_xlib_surface_create(dpy, drawable, visual, mSize.width, mSize.height);
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Init(surf);
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}
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gfxXlibSurface::gfxXlibSurface(Display *dpy, Drawable drawable, Visual *visual, const gfxIntSize& size)
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: mPixmapTaken(PR_FALSE), mDisplay(dpy), mDrawable(drawable), mSize(size)
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{
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NS_ASSERTION(CheckSurfaceSize(size, XLIB_IMAGE_SIDE_SIZE_LIMIT),
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"Bad size");
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cairo_surface_t *surf = cairo_xlib_surface_create(dpy, drawable, visual, mSize.width, mSize.height);
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Init(surf);
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}
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gfxXlibSurface::gfxXlibSurface(Screen *screen, Drawable drawable, XRenderPictFormat *format,
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const gfxIntSize& size)
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: mPixmapTaken(PR_FALSE), mDisplay(DisplayOfScreen(screen)),
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mDrawable(drawable), mSize(size)
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{
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NS_ASSERTION(CheckSurfaceSize(size, XLIB_IMAGE_SIDE_SIZE_LIMIT),
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"Bad Size");
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cairo_surface_t *surf =
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cairo_xlib_surface_create_with_xrender_format(mDisplay, drawable,
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screen, format,
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mSize.width, mSize.height);
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Init(surf);
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}
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gfxXlibSurface::gfxXlibSurface(cairo_surface_t *csurf)
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: mPixmapTaken(PR_FALSE),
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mSize(cairo_xlib_surface_get_width(csurf),
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cairo_xlib_surface_get_height(csurf))
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{
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NS_PRECONDITION(cairo_surface_status(csurf) == 0,
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"Not expecting an error surface");
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mDrawable = cairo_xlib_surface_get_drawable(csurf);
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mDisplay = cairo_xlib_surface_get_display(csurf);
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Init(csurf, PR_TRUE);
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}
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gfxXlibSurface::~gfxXlibSurface()
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{
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if (mPixmapTaken) {
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XFreePixmap (mDisplay, mDrawable);
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}
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}
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static Drawable
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CreatePixmap(Screen *screen, const gfxIntSize& size, unsigned int depth,
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Drawable relatedDrawable)
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{
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if (!gfxASurface::CheckSurfaceSize(size, XLIB_IMAGE_SIDE_SIZE_LIMIT))
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return None;
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if (relatedDrawable == None) {
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relatedDrawable = RootWindowOfScreen(screen);
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}
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Display *dpy = DisplayOfScreen(screen);
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// X gives us a fatal error if we try to create a pixmap of width
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// or height 0
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return XCreatePixmap(dpy, relatedDrawable,
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NS_MAX(1, size.width), NS_MAX(1, size.height),
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depth);
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}
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/* static */
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already_AddRefed<gfxXlibSurface>
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gfxXlibSurface::Create(Screen *screen, Visual *visual,
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const gfxIntSize& size, Drawable relatedDrawable)
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{
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Drawable drawable =
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CreatePixmap(screen, size, DepthOfVisual(screen, visual),
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relatedDrawable);
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if (!drawable)
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return nsnull;
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nsRefPtr<gfxXlibSurface> result =
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new gfxXlibSurface(DisplayOfScreen(screen), drawable, visual, size);
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result->TakePixmap();
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if (result->CairoStatus() != 0)
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return nsnull;
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return result.forget();
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}
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/* static */
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already_AddRefed<gfxXlibSurface>
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gfxXlibSurface::Create(Screen *screen, XRenderPictFormat *format,
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const gfxIntSize& size, Drawable relatedDrawable)
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{
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Drawable drawable =
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CreatePixmap(screen, size, format->depth, relatedDrawable);
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if (!drawable)
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return nsnull;
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nsRefPtr<gfxXlibSurface> result =
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new gfxXlibSurface(screen, drawable, format, size);
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result->TakePixmap();
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if (result->CairoStatus() != 0)
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return nsnull;
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return result.forget();
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}
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static PRBool GetForce24bppPref()
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{
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PRBool val = PR_FALSE; // default
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nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
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if (!prefs)
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return val;
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prefs->GetBoolPref("mozilla.widget.force-24bpp", &val);
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return val;
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}
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already_AddRefed<gfxASurface>
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gfxXlibSurface::CreateSimilarSurface(gfxContentType aContent,
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const gfxIntSize& aSize)
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{
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if (!mSurface || !mSurfaceValid) {
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return nsnull;
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}
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if (aContent == CONTENT_COLOR) {
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// cairo_surface_create_similar will use a matching visual if it can.
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// However, systems with 16-bit or indexed default visuals may benefit
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// from rendering with 24-bit formats.
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static PRBool force24bpp = GetForce24bppPref();
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if (force24bpp
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&& cairo_xlib_surface_get_depth(CairoSurface()) != 24) {
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XRenderPictFormat* format =
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XRenderFindStandardFormat(mDisplay, PictStandardRGB24);
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if (format) {
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// Cairo only performs simple self-copies as desired if it
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// knows that this is a Pixmap surface. It only knows that
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// surfaces are pixmap surfaces if it creates the Pixmap
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// itself, so we use cairo_surface_create_similar with a
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// temporary reference surface to indicate the format.
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Screen* screen = cairo_xlib_surface_get_screen(CairoSurface());
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nsRefPtr<gfxXlibSurface> depth24reference =
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gfxXlibSurface::Create(screen, format,
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gfxIntSize(1, 1), mDrawable);
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if (depth24reference)
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return depth24reference->
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gfxASurface::CreateSimilarSurface(aContent, aSize);
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}
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}
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}
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return gfxASurface::CreateSimilarSurface(aContent, aSize);
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}
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void
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gfxXlibSurface::DoSizeQuery()
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{
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// figure out width/height/depth
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Window root_ignore;
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int x_ignore, y_ignore;
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unsigned int bwidth_ignore, width, height, depth;
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XGetGeometry(mDisplay,
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mDrawable,
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&root_ignore, &x_ignore, &y_ignore,
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&width, &height,
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&bwidth_ignore, &depth);
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mSize.width = width;
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mSize.height = height;
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}
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class DisplayTable {
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public:
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static PRBool GetColormapAndVisual(Screen* screen,
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XRenderPictFormat* format,
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Visual* visual, Colormap* colormap,
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Visual** visualForColormap);
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private:
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struct ColormapEntry {
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XRenderPictFormat* mFormat;
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// The Screen is needed here because colormaps (and their visuals) may
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// only be used on one Screen, but XRenderPictFormats are not unique
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// to any one Screen.
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Screen* mScreen;
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Visual* mVisual;
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Colormap mColormap;
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};
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class DisplayInfo {
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public:
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DisplayInfo(Display* display) : mDisplay(display) { }
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Display* mDisplay;
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nsTArray<ColormapEntry> mColormapEntries;
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};
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// Comparator for finding the DisplayInfo
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class FindDisplay {
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public:
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PRBool Equals(const DisplayInfo& info, const Display *display) const
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{
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return info.mDisplay == display;
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}
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};
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static int DisplayClosing(Display *display, XExtCodes* codes);
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nsTArray<DisplayInfo> mDisplays;
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static DisplayTable* sDisplayTable;
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};
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DisplayTable* DisplayTable::sDisplayTable;
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// Pixmaps don't have a particular associated visual but the pixel values are
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// interpreted according to a visual/colormap pairs.
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//
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// cairo is designed for surfaces with either TrueColor visuals or the
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// default visual (which may not be true color). TrueColor visuals don't
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// really need a colormap because the visual indicates the pixel format,
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// and cairo uses the default visual with the default colormap, so cairo
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// surfaces don't need an explicit colormap.
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//
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// However, some toolkits (e.g. GDK) need a colormap even with TrueColor
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// visuals. We can create a colormap for these visuals, but it will use about
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// 20kB of memory in the server, so we use the default colormap when
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// suitable and share colormaps between surfaces. Another reason for
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// minimizing colormap turnover is that the plugin process must leak resources
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// for each new colormap id when using older GDK libraries (bug 569775).
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//
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// Only the format of the pixels is important for rendering to Pixmaps, so if
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// the format of a visual matches that of the surface, then that visual can be
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// used for rendering to the surface. Multiple visuals can match the same
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// format (but have different GLX properties), so the visual returned may
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// differ from the visual passed in. Colormaps are tied to a visual, so
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// should only be used with their visual.
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/* static */ PRBool
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DisplayTable::GetColormapAndVisual(Screen* aScreen, XRenderPictFormat* aFormat,
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Visual* aVisual, Colormap* aColormap,
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Visual** aVisualForColormap)
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{
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Display* display = DisplayOfScreen(aScreen);
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// Use the default colormap if the default visual matches.
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Visual *defaultVisual = DefaultVisualOfScreen(aScreen);
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if (aVisual == defaultVisual
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|| (aFormat
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&& aFormat == XRenderFindVisualFormat(display, defaultVisual)))
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{
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*aColormap = DefaultColormapOfScreen(aScreen);
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*aVisualForColormap = defaultVisual;
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return PR_TRUE;
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}
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// Only supporting TrueColor non-default visuals
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if (!aVisual || aVisual->c_class != TrueColor)
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return PR_FALSE;
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if (!sDisplayTable) {
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sDisplayTable = new DisplayTable();
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}
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nsTArray<DisplayInfo>* displays = &sDisplayTable->mDisplays;
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PRUint32 d = displays->IndexOf(display, 0, FindDisplay());
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if (d == displays->NoIndex) {
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d = displays->Length();
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// Register for notification of display closing, when this info
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// becomes invalid.
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XExtCodes *codes = XAddExtension(display);
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if (!codes)
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return PR_FALSE;
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XESetCloseDisplay(display, codes->extension, DisplayClosing);
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// Add a new DisplayInfo.
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displays->AppendElement(display);
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}
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nsTArray<ColormapEntry>* entries =
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&displays->ElementAt(d).mColormapEntries;
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// Only a small number of formats are expected to be used, so just do a
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// simple linear search.
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for (PRUint32 i = 0; i < entries->Length(); ++i) {
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const ColormapEntry& entry = entries->ElementAt(i);
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// Only the format and screen need to match. (The visual may differ.)
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// If there is no format (e.g. no RENDER extension) then just compare
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// the visual.
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if ((aFormat && entry.mFormat == aFormat && entry.mScreen == aScreen)
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|| aVisual == entry.mVisual) {
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*aColormap = entry.mColormap;
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*aVisualForColormap = entry.mVisual;
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return PR_TRUE;
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}
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}
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// No existing entry. Create a colormap and add an entry.
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Colormap colormap = XCreateColormap(display, RootWindowOfScreen(aScreen),
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aVisual, AllocNone);
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ColormapEntry* newEntry = entries->AppendElement();
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newEntry->mFormat = aFormat;
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newEntry->mScreen = aScreen;
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newEntry->mVisual = aVisual;
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newEntry->mColormap = colormap;
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*aColormap = colormap;
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*aVisualForColormap = aVisual;
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return PR_TRUE;
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}
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/* static */ int
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DisplayTable::DisplayClosing(Display *display, XExtCodes* codes)
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{
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// No need to free the colormaps explicitly as they will be released when
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// the connection is closed.
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sDisplayTable->mDisplays.RemoveElement(display, FindDisplay());
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if (sDisplayTable->mDisplays.Length() == 0) {
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delete sDisplayTable;
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sDisplayTable = nsnull;
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}
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return 0;
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}
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PRBool
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gfxXlibSurface::GetColormapAndVisual(Colormap* aColormap, Visual** aVisual)
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{
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if (!mSurfaceValid)
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return PR_FALSE;
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XRenderPictFormat* format =
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cairo_xlib_surface_get_xrender_format(CairoSurface());
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Screen* screen = cairo_xlib_surface_get_screen(CairoSurface());
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Visual* visual = cairo_xlib_surface_get_visual(CairoSurface());
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return DisplayTable::GetColormapAndVisual(screen, format, visual,
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aColormap, aVisual);
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}
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/* static */
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int
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gfxXlibSurface::DepthOfVisual(const Screen* screen, const Visual* visual)
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{
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for (int d = 0; d < screen->ndepths; d++) {
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const Depth& d_info = screen->depths[d];
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if (visual >= &d_info.visuals[0]
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&& visual < &d_info.visuals[d_info.nvisuals])
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return d_info.depth;
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}
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NS_ERROR("Visual not on Screen.");
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return 0;
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}
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/* static */
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Visual*
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gfxXlibSurface::FindVisual(Screen *screen, gfxImageFormat format)
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{
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int depth;
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unsigned long red_mask, green_mask, blue_mask;
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switch (format) {
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case ImageFormatARGB32:
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depth = 32;
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red_mask = 0xff0000;
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green_mask = 0xff00;
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blue_mask = 0xff;
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break;
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case ImageFormatRGB24:
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depth = 24;
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red_mask = 0xff0000;
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green_mask = 0xff00;
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blue_mask = 0xff;
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break;
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case ImageFormatRGB16_565:
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depth = 16;
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red_mask = 0xf800;
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green_mask = 0x7e0;
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blue_mask = 0x1f;
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break;
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case ImageFormatA8:
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case ImageFormatA1:
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default:
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return NULL;
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}
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for (int d = 0; d < screen->ndepths; d++) {
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const Depth& d_info = screen->depths[d];
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if (d_info.depth != depth)
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continue;
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for (int v = 0; v < d_info.nvisuals; v++) {
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Visual* visual = &d_info.visuals[v];
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if (visual->c_class == TrueColor &&
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visual->red_mask == red_mask &&
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visual->green_mask == green_mask &&
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visual->blue_mask == blue_mask)
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return visual;
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}
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}
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return NULL;
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}
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/* static */
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XRenderPictFormat*
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gfxXlibSurface::FindRenderFormat(Display *dpy, gfxImageFormat format)
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{
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switch (format) {
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case ImageFormatARGB32:
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return XRenderFindStandardFormat (dpy, PictStandardARGB32);
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case ImageFormatRGB24:
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return XRenderFindStandardFormat (dpy, PictStandardRGB24);
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case ImageFormatRGB16_565: {
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// PictStandardRGB16_565 is not standard Xrender format
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// we should try to find related visual
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// and find xrender format by visual
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Visual *visual = FindVisual(DefaultScreenOfDisplay(dpy), format);
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if (!visual)
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return NULL;
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return XRenderFindVisualFormat(dpy, visual);
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}
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case ImageFormatA8:
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return XRenderFindStandardFormat (dpy, PictStandardA8);
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case ImageFormatA1:
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return XRenderFindStandardFormat (dpy, PictStandardA1);
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default:
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break;
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}
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return (XRenderPictFormat*)NULL;
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}
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Screen*
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gfxXlibSurface::XScreen()
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{
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return cairo_xlib_surface_get_screen(CairoSurface());
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}
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XRenderPictFormat*
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gfxXlibSurface::XRenderFormat()
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{
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return cairo_xlib_surface_get_xrender_format(CairoSurface());
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}
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