90 lines
2.6 KiB
C++
90 lines
2.6 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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#include "mozilla/ipc/SharedMemorySysV.h"
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#if defined(MOZ_X11) && defined(MOZ_HAVE_SHAREDMEMORYSYSV)
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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 "mozilla/X11Util.h"
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <X11/extensions/XShm.h>
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#ifdef MOZ_WIDGET_QT
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class QRect;
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class QWindow;
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#endif
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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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typedef mozilla::ipc::SharedMemorySysV SharedMemorySysV;
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public:
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static bool UseShm();
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static already_AddRefed<nsShmImage>
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Create(const mozilla::gfx::IntSize& aSize,
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Display* aDisplay, Visual* aVisual, unsigned int aDepth);
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static already_AddRefed<mozilla::gfx::DrawTarget>
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EnsureShmImage(const mozilla::gfx::IntSize& aSize,
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Display* aDisplay, Visual* aVisual, unsigned int aDepth,
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RefPtr<nsShmImage>& aImage);
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private:
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~nsShmImage() {
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if (mImage) {
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mozilla::FinishX(mDisplay);
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if (mXAttached) {
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XShmDetach(mDisplay, &mInfo);
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}
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XDestroyImage(mImage);
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}
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}
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public:
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already_AddRefed<mozilla::gfx::DrawTarget> CreateDrawTarget();
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#ifdef MOZ_WIDGET_GTK
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void Put(Display* aDisplay, Drawable aWindow, const nsIntRegion& aRegion);
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#elif defined(MOZ_WIDGET_QT)
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void Put(QWindow* aWindow, QRect& aRect);
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#endif
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mozilla::gfx::IntSize Size() const { return mSize; }
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private:
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nsShmImage()
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: mImage(nullptr)
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, mDisplay(nullptr)
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, mFormat(mozilla::gfx::SurfaceFormat::UNKNOWN)
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, mXAttached(false)
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{ mInfo.shmid = SharedMemorySysV::NULLHandle(); }
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RefPtr<SharedMemorySysV> mSegment;
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XImage* mImage;
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Display* mDisplay;
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XShmSegmentInfo mInfo;
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mozilla::gfx::IntSize mSize;
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mozilla::gfx::SurfaceFormat mFormat;
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bool mXAttached;
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};
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#endif // MOZ_HAVE_SHMIMAGE
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#endif
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