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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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This commit is contained in:
Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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widget/nsShmImage.h Normal file
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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__
#if defined(MOZ_X11)
# define MOZ_HAVE_SHMIMAGE
#endif
#ifdef MOZ_HAVE_SHMIMAGE
#include "mozilla/gfx/2D.h"
#include "nsIWidget.h"
#include "Units.h"
#include <X11/Xlib-xcb.h>
#include <xcb/shm.h>
class nsShmImage {
// bug 1168843, compositor thread may create shared memory instances that are destroyed by main thread on shutdown, so this must use thread-safe RC to avoid hitting assertion
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(nsShmImage)
public:
static bool UseShm();
already_AddRefed<mozilla::gfx::DrawTarget>
CreateDrawTarget(const mozilla::LayoutDeviceIntRegion& aRegion);
void Put(const mozilla::LayoutDeviceIntRegion& aRegion);
nsShmImage(Display* aDisplay,
Drawable aWindow,
Visual* aVisual,
unsigned int aDepth);
private:
~nsShmImage();
bool InitExtension();
bool CreateShmSegment();
void DestroyShmSegment();
bool CreateImage(const mozilla::gfx::IntSize& aSize);
void DestroyImage();
void WaitIfPendingReply();
Display* mDisplay;
xcb_connection_t* mConnection;
Window mWindow;
Visual* mVisual;
unsigned int mDepth;
mozilla::gfx::SurfaceFormat mFormat;
mozilla::gfx::IntSize mSize;
int mStride;
xcb_pixmap_t mPixmap;
xcb_gcontext_t mGC;
xcb_get_input_focus_cookie_t mSyncRequest;
bool mRequestPending;
xcb_shm_seg_t mShmSeg;
int mShmId;
uint8_t* mShmAddr;
};
#endif // MOZ_HAVE_SHMIMAGE
#endif