Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
       2             :  * This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #ifndef GFX_COPYABLECANVASLAYER_H
       7             : #define GFX_COPYABLECANVASLAYER_H
       8             : 
       9             : #include <stdint.h>                     // for uint32_t
      10             : #include "GLContextTypes.h"             // for GLContext
      11             : #include "Layers.h"                     // for CanvasLayer, etc
      12             : #include "gfxContext.h"                 // for gfxContext, etc
      13             : #include "gfxTypes.h"
      14             : #include "gfxPlatform.h"                // for gfxImageFormat
      15             : #include "mozilla/Assertions.h"         // for MOZ_ASSERT, etc
      16             : #include "mozilla/Preferences.h"        // for Preferences
      17             : #include "mozilla/RefPtr.h"             // for RefPtr
      18             : #include "mozilla/gfx/2D.h"             // for DrawTarget
      19             : #include "mozilla/mozalloc.h"           // for operator delete, etc
      20             : #include "nsISupportsImpl.h"            // for MOZ_COUNT_CTOR, etc
      21             : 
      22             : namespace mozilla {
      23             : 
      24             : namespace gl {
      25             : class SharedSurface;
      26             : } // namespace gl
      27             : 
      28             : namespace layers {
      29             : 
      30             : /**
      31             :  * A shared CanvasLayer implementation that supports copying
      32             :  * its contents into a gfxASurface using UpdateSurface.
      33             :  */
      34             : class CopyableCanvasLayer : public CanvasLayer
      35             : {
      36             : public:
      37             :   CopyableCanvasLayer(LayerManager* aLayerManager, void *aImplData);
      38             : 
      39             : protected:
      40             :   virtual ~CopyableCanvasLayer();
      41             : 
      42             : public:
      43             :   virtual void Initialize(const Data& aData) override;
      44             : 
      45             :   virtual bool IsDataValid(const Data& aData) override;
      46             : 
      47           0 :   bool IsGLLayer() { return !!mGLContext; }
      48             : 
      49             : protected:
      50             :   RefPtr<gl::GLContext> mGLContext;
      51             :   RefPtr<PersistentBufferProvider> mBufferProvider;
      52             :   UniquePtr<gl::SharedSurface> mGLFrontbuffer;
      53             : 
      54             :   bool mIsAlphaPremultiplied;
      55             :   gl::OriginPos mOriginPos;
      56             :   bool mIsMirror;
      57             : 
      58             :   RefPtr<gfx::DataSourceSurface> mCachedTempSurface;
      59             : 
      60             :   gfx::DataSourceSurface* GetTempSurface(const gfx::IntSize& aSize,
      61             :                                          const gfx::SurfaceFormat aFormat);
      62             : };
      63             : 
      64             : } // namespace layers
      65             : } // namespace mozilla
      66             : 
      67             : #endif