michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef GFX_COPYABLECANVASLAYER_H
michael@0: #define GFX_COPYABLECANVASLAYER_H
michael@0: 
michael@0: #include <stdint.h>                     // for uint32_t
michael@0: #include "GLContextTypes.h"             // for GLContext
michael@0: #include "Layers.h"                     // for CanvasLayer, etc
michael@0: #include "gfxContext.h"                 // for gfxContext, etc
michael@0: #include "gfxTypes.h"
michael@0: #include "gfxPlatform.h"                // for gfxImageFormat
michael@0: #include "mozilla/Assertions.h"         // for MOZ_ASSERT, etc
michael@0: #include "mozilla/Preferences.h"        // for Preferences
michael@0: #include "mozilla/RefPtr.h"             // for RefPtr
michael@0: #include "mozilla/gfx/2D.h"             // for DrawTarget
michael@0: #include "mozilla/mozalloc.h"           // for operator delete, etc
michael@0: #include "nsAutoPtr.h"                  // for nsRefPtr
michael@0: #include "nsISupportsImpl.h"            // for MOZ_COUNT_CTOR, etc
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: namespace gfx {
michael@0: class SurfaceStream;
michael@0: class SharedSurface;
michael@0: class SurfaceFactory;
michael@0: }
michael@0: 
michael@0: namespace layers {
michael@0: 
michael@0: class CanvasClientWebGL;
michael@0: 
michael@0: /**
michael@0:  * A shared CanvasLayer implementation that supports copying
michael@0:  * its contents into a gfxASurface using UpdateSurface.
michael@0:  */
michael@0: class CopyableCanvasLayer : public CanvasLayer
michael@0: {
michael@0: public:
michael@0:   CopyableCanvasLayer(LayerManager* aLayerManager, void *aImplData);
michael@0:   virtual ~CopyableCanvasLayer();
michael@0: 
michael@0:   virtual void Initialize(const Data& aData);
michael@0: 
michael@0:   virtual bool IsDataValid(const Data& aData);
michael@0: 
michael@0: protected:
michael@0:   void UpdateTarget(gfx::DrawTarget* aDestTarget = nullptr);
michael@0: 
michael@0:   RefPtr<gfx::SourceSurface> mSurface;
michael@0:   nsRefPtr<mozilla::gl::GLContext> mGLContext;
michael@0:   mozilla::RefPtr<mozilla::gfx::DrawTarget> mDrawTarget;
michael@0: 
michael@0:   RefPtr<gfx::SurfaceStream> mStream;
michael@0: 
michael@0:   uint32_t mCanvasFramebuffer;
michael@0: 
michael@0:   bool mIsGLAlphaPremult;
michael@0:   bool mNeedsYFlip;
michael@0: 
michael@0:   RefPtr<gfx::DataSourceSurface> mCachedTempSurface;
michael@0:   gfx::IntSize mCachedSize;
michael@0:   gfx::SurfaceFormat mCachedFormat;
michael@0: 
michael@0:   gfx::DataSourceSurface* GetTempSurface(const gfx::IntSize& aSize,
michael@0:                                          const gfx::SurfaceFormat aFormat);
michael@0: 
michael@0:   void DiscardTempSurface();
michael@0: };
michael@0: 
michael@0: }
michael@0: }
michael@0: 
michael@0: #endif