зеркало из https://github.com/mozilla/gecko-dev.git
74 строки
1.9 KiB
C++
74 строки
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __mozilla_widget_nsShmImage_h__
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#define __mozilla_widget_nsShmImage_h__
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#if defined(MOZ_X11)
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# define MOZ_HAVE_SHMIMAGE
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#endif
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#ifdef MOZ_HAVE_SHMIMAGE
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#include "mozilla/gfx/2D.h"
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#include "nsIWidget.h"
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#include "Units.h"
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#include <X11/Xlib-xcb.h>
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#include <xcb/shm.h>
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class nsShmImage {
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// 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
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(nsShmImage)
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public:
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static bool UseShm();
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already_AddRefed<mozilla::gfx::DrawTarget>
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CreateDrawTarget(const mozilla::LayoutDeviceIntRegion& aRegion);
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void Put(const mozilla::LayoutDeviceIntRegion& aRegion);
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nsShmImage(Display* aDisplay,
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Drawable aWindow,
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Visual* aVisual,
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unsigned int aDepth);
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private:
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~nsShmImage();
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bool InitExtension();
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bool CreateShmSegment();
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void DestroyShmSegment();
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bool CreateImage(const mozilla::gfx::IntSize& aSize);
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void DestroyImage();
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void WaitIfPendingReply();
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xcb_connection_t* mConnection;
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Window mWindow;
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Visual* mVisual;
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unsigned int mDepth;
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mozilla::gfx::SurfaceFormat mFormat;
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mozilla::gfx::IntSize mSize;
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xcb_pixmap_t mPixmap;
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xcb_gcontext_t mGC;
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xcb_get_input_focus_cookie_t mSyncRequest;
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bool mRequestPending;
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xcb_shm_seg_t mShmSeg;
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int mShmId;
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uint8_t* mShmAddr;
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};
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#endif // MOZ_HAVE_SHMIMAGE
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#endif
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