gecko/widget/shared/nsShmImage.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
2012-05-21 04:12:37 -07:00
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef __mozilla_widget_nsShmImage_h__
#define __mozilla_widget_nsShmImage_h__
#include "mozilla/ipc/SharedMemorySysV.h"
#if defined(MOZ_X11) && defined(MOZ_HAVE_SHAREDMEMORYSYSV)
# define MOZ_HAVE_SHMIMAGE
#endif
#ifdef MOZ_HAVE_SHMIMAGE
#include "nsIWidget.h"
#include "gfxASurface.h"
#include "mozilla/X11Util.h"
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/extensions/XShm.h>
#if defined(MOZ_WIDGET_GTK)
#define DISPLAY gdk_x11_get_default_xdisplay
#elif defined(MOZ_WIDGET_QT)
#define DISPLAY mozilla::DefaultXDisplay
#endif
class QRect;
class QWidget;
class nsShmImage {
NS_INLINE_DECL_REFCOUNTING(nsShmImage)
typedef mozilla::ipc::SharedMemorySysV SharedMemorySysV;
public:
typedef gfxASurface::gfxImageFormat Format;
static bool UseShm();
static already_AddRefed<nsShmImage>
Create(const gfxIntSize& aSize, Visual* aVisual, unsigned int aDepth);
static already_AddRefed<gfxASurface>
EnsureShmImage(const gfxIntSize& aSize, Visual* aVisual, unsigned int aDepth,
nsRefPtr<nsShmImage>& aImage);
~nsShmImage() {
if (mImage) {
mozilla::FinishX(DISPLAY());
if (mXAttached) {
XShmDetach(DISPLAY(), &mInfo);
}
XDestroyImage(mImage);
}
}
already_AddRefed<gfxASurface> AsSurface();
#if (MOZ_WIDGET_GTK == 2)
void Put(GdkWindow* aWindow, GdkRectangle* aRects, GdkRectangle* aEnd);
#elif (MOZ_WIDGET_GTK == 3)
void Put(GdkWindow* aWindow, cairo_rectangle_list_t* aRects);
#elif defined(MOZ_WIDGET_QT)
void Put(QWidget* aWindow, QRect& aRect);
#endif
gfxIntSize Size() const { return mSize; }
private:
nsShmImage()
: mImage(nullptr)
, mXAttached(false)
{ mInfo.shmid = SharedMemorySysV::NULLHandle(); }
nsRefPtr<SharedMemorySysV> mSegment;
XImage* mImage;
XShmSegmentInfo mInfo;
gfxIntSize mSize;
Format mFormat;
bool mXAttached;
};
#endif // MOZ_HAVE_SHMIMAGE
#endif