gecko-dev/widget/shared/nsShmImage.cpp

239 строки
7.9 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* ***** 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 the Mozilla browser.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Chris Jones <jones.chris.g@gmail.com>
* Oleg Romashin <romaxa@gmail.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 ***** */
#if defined(MOZ_WIDGET_GTK2) || defined(MOZ_WIDGET_GTK3)
#include <gtk/gtk.h>
#include <gdk/gdkx.h>
#elif defined(MOZ_WIDGET_QT)
#include <QWidget>
#endif
#include "nsShmImage.h"
#include "gfxPlatform.h"
#include "gfxImageSurface.h"
#ifdef MOZ_HAVE_SHMIMAGE
using namespace mozilla::ipc;
// If XShm isn't available to our client, we'll try XShm once, fail,
// set this to false and then never try again.
static bool gShmAvailable = true;
bool nsShmImage::UseShm()
{
return gfxPlatform::GetPlatform()->
ScreenReferenceSurface()->GetType() == gfxASurface::SurfaceTypeImage
&& gShmAvailable;
}
already_AddRefed<nsShmImage>
nsShmImage::Create(const gfxIntSize& aSize,
Visual* aVisual, unsigned int aDepth)
{
Display* dpy = DISPLAY();
nsRefPtr<nsShmImage> shm = new nsShmImage();
shm->mImage = XShmCreateImage(dpy, aVisual, aDepth,
ZPixmap, nsnull,
&(shm->mInfo),
aSize.width, aSize.height);
if (!shm->mImage) {
return nsnull;
}
size_t size = SharedMemory::PageAlignedSize(
shm->mImage->bytes_per_line * shm->mImage->height);
shm->mSegment = new SharedMemorySysV();
if (!shm->mSegment->Create(size) || !shm->mSegment->Map(size)) {
return nsnull;
}
shm->mInfo.shmid = shm->mSegment->GetHandle();
shm->mInfo.shmaddr =
shm->mImage->data = static_cast<char*>(shm->mSegment->memory());
shm->mInfo.readOnly = False;
int xerror = 0;
#if defined(MOZ_WIDGET_GTK2) || defined(MOZ_WIDGET_GTK3)
gdk_error_trap_push();
Status attachOk = XShmAttach(dpy, &shm->mInfo);
XSync(dpy, False);
xerror = gdk_error_trap_pop();
#elif defined(MOZ_WIDGET_QT)
Status attachOk = XShmAttach(dpy, &shm->mInfo);
#endif
if (!attachOk || xerror) {
// Assume XShm isn't available, and don't attempt to use it
// again.
gShmAvailable = false;
return nsnull;
}
shm->mXAttached = true;
shm->mSize = aSize;
switch (shm->mImage->depth) {
case 24:
// Only xRGB is supported.
if ((shm->mImage->red_mask == 0xff0000) &&
(shm->mImage->green_mask == 0xff00) &&
(shm->mImage->blue_mask == 0xff)) {
shm->mFormat = gfxASurface::ImageFormatRGB24;
break;
}
goto unsupported;
case 16:
shm->mFormat = gfxASurface::ImageFormatRGB16_565; break;
unsupported:
default:
NS_WARNING("Unsupported XShm Image format!");
gShmAvailable = false;
return nsnull;
}
return shm.forget();
}
already_AddRefed<gfxASurface>
nsShmImage::AsSurface()
{
return nsRefPtr<gfxASurface>(
new gfxImageSurface(static_cast<unsigned char*>(mSegment->memory()),
mSize,
mImage->bytes_per_line,
mFormat)
).forget();
}
#if defined(MOZ_WIDGET_GTK2)
void
nsShmImage::Put(GdkWindow* aWindow, GdkRectangle* aRects, GdkRectangle* aEnd)
{
GdkDrawable* gd;
gint dx, dy;
gdk_window_get_internal_paint_info(aWindow, &gd, &dx, &dy);
Display* dpy = gdk_x11_get_default_xdisplay();
Drawable d = GDK_DRAWABLE_XID(gd);
GC gc = XCreateGC(dpy, d, 0, nsnull);
for (GdkRectangle* r = aRects; r < aEnd; r++) {
XShmPutImage(dpy, d, gc, mImage,
r->x, r->y,
r->x - dx, r->y - dy,
r->width, r->height,
False);
}
XFreeGC(dpy, gc);
// FIXME/bug 597336: we need to ensure that the shm image isn't
// scribbled over before all its pending XShmPutImage()s complete.
// However, XSync() is an unnecessarily heavyweight
// synchronization mechanism; other options are possible. If this
// XSync is shown to hurt responsiveness, we need to explore the
// other options.
XSync(dpy, False);
}
#elif defined(MOZ_WIDGET_GTK3)
void
nsShmImage::Put(GdkWindow* aWindow, cairo_rectangle_list_t* aRects)
{
Display* dpy = gdk_x11_get_default_xdisplay();
Drawable d = GDK_WINDOW_XID(aWindow);
int dx = 0, dy = 0;
GC gc = XCreateGC(dpy, d, 0, nsnull);
cairo_rectangle_t r;
for (int i = 0; i < aRects->num_rectangles; i++) {
r = aRects->rectangles[i];
XShmPutImage(dpy, d, gc, mImage,
r.x, r.y,
r.x - dx, r.y - dy,
r.width, r.height,
False);
}
XFreeGC(dpy, gc);
// FIXME/bug 597336: we need to ensure that the shm image isn't
// scribbled over before all its pending XShmPutImage()s complete.
// However, XSync() is an unnecessarily heavyweight
// synchronization mechanism; other options are possible. If this
// XSync is shown to hurt responsiveness, we need to explore the
// other options.
XSync(dpy, False);
}
#elif defined(MOZ_WIDGET_QT)
void
nsShmImage::Put(QWidget* aWindow, QRect& aRect)
{
Display* dpy = aWindow->x11Info().display();
Drawable d = aWindow->handle();
GC gc = XCreateGC(dpy, d, 0, nsnull);
// Avoid out of bounds painting
QRect inter = aRect.intersected(aWindow->rect());
XShmPutImage(dpy, d, gc, mImage,
inter.x(), inter.y(),
inter.x(), inter.y(),
inter.width(), inter.height(),
False);
XFreeGC(dpy, gc);
}
#endif
already_AddRefed<gfxASurface>
nsShmImage::EnsureShmImage(const gfxIntSize& aSize, Visual* aVisual, unsigned int aDepth,
nsRefPtr<nsShmImage>& aImage)
{
if (!aImage || aImage->Size() != aSize) {
// Because we XSync() after XShmAttach() to trap errors, we
// know that the X server has the old image's memory mapped
// into its address space, so it's OK to destroy the old image
// here even if there are outstanding Puts. The Detach is
// ordered after the Puts.
aImage = nsShmImage::Create(aSize, aVisual, aDepth);
}
return !aImage ? nsnull : aImage->AsSurface();
}
#endif // defined(MOZ_X11) && defined(MOZ_HAVE_SHAREDMEMORYSYSV)