зеркало из https://github.com/mozilla/gecko-dev.git
72 строки
2.2 KiB
C++
72 строки
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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 GFX_COPYABLECANVASLAYER_H
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#define GFX_COPYABLECANVASLAYER_H
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#include <stdint.h> // for uint32_t
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#include "GLContextTypes.h" // for GLContext
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#include "Layers.h" // for CanvasLayer, etc
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#include "gfxContext.h" // for gfxContext, etc
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#include "gfxTypes.h"
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#include "gfxPlatform.h" // for gfxImageFormat
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#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc
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#include "mozilla/Preferences.h" // for Preferences
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#include "mozilla/RefPtr.h" // for RefPtr
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#include "mozilla/gfx/2D.h" // for DrawTarget
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#include "mozilla/mozalloc.h" // for operator delete, etc
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#include "nsAutoPtr.h" // for nsRefPtr
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#include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, etc
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namespace mozilla {
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namespace layers {
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class CanvasClientWebGL;
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/**
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* A shared CanvasLayer implementation that supports copying
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* its contents into a gfxASurface using UpdateSurface.
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*/
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class CopyableCanvasLayer : public CanvasLayer
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{
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public:
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CopyableCanvasLayer(LayerManager* aLayerManager, void *aImplData);
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protected:
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virtual ~CopyableCanvasLayer();
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public:
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virtual void Initialize(const Data& aData) override;
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virtual bool IsDataValid(const Data& aData) override;
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bool IsGLLayer() { return !!mGLContext; }
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protected:
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void UpdateTarget(gfx::DrawTarget* aDestTarget = nullptr);
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RefPtr<gfx::SourceSurface> mSurface;
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nsRefPtr<gl::GLContext> mGLContext;
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GLuint mCanvasFrontbufferTexID;
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mozilla::RefPtr<mozilla::gfx::DrawTarget> mDrawTarget;
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UniquePtr<gl::SharedSurface> mGLFrontbuffer;
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bool mIsAlphaPremultiplied;
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gl::OriginPos mOriginPos;
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RefPtr<gfx::DataSourceSurface> mCachedTempSurface;
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gfx::DataSourceSurface* GetTempSurface(const gfx::IntSize& aSize,
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const gfx::SurfaceFormat aFormat);
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void DiscardTempSurface();
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};
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}
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}
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#endif
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