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73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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 "nsAutoPtr.h"
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#include <X11/Xlib.h>
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#include <X11/extensions/XShm.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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: mImage(nullptr)
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, mDisplay(aDisplay)
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, mWindow(aWindow)
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, mVisual(aVisual)
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, mDepth(aDepth)
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, mFormat(mozilla::gfx::SurfaceFormat::UNKNOWN)
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{
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mInfo.shmid = -1;
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}
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private:
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~nsShmImage()
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{
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DestroyImage();
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}
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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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XImage* mImage;
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Display* mDisplay;
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Drawable mWindow;
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Visual* mVisual;
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unsigned int mDepth;
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XShmSegmentInfo mInfo;
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mozilla::gfx::SurfaceFormat mFormat;
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};
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#endif // MOZ_HAVE_SHMIMAGE
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#endif
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