The Tor Browser: gfx/layers/CopyableCanvasLayer.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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/. */

     6 #ifndef GFX_COPYABLECANVASLAYER_H

     7 #define GFX_COPYABLECANVASLAYER_H

     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 "nsAutoPtr.h"                  // for nsRefPtr

    21 #include "nsISupportsImpl.h"            // for MOZ_COUNT_CTOR, etc

    23 namespace mozilla {

    25 namespace gfx {

    26 class SurfaceStream;

    27 class SharedSurface;

    28 class SurfaceFactory;

    29 }

    31 namespace layers {

    33 class CanvasClientWebGL;

    35 /**

    36  * A shared CanvasLayer implementation that supports copying

    37  * its contents into a gfxASurface using UpdateSurface.

    38  */

    39 class CopyableCanvasLayer : public CanvasLayer

    40 {

    41 public:

    42   CopyableCanvasLayer(LayerManager* aLayerManager, void *aImplData);

    43   virtual ~CopyableCanvasLayer();

    45   virtual void Initialize(const Data& aData);

    47   virtual bool IsDataValid(const Data& aData);

    49 protected:

    50   void UpdateTarget(gfx::DrawTarget* aDestTarget = nullptr);

    52   RefPtr<gfx::SourceSurface> mSurface;

    53   nsRefPtr<mozilla::gl::GLContext> mGLContext;

    54   mozilla::RefPtr<mozilla::gfx::DrawTarget> mDrawTarget;

    56   RefPtr<gfx::SurfaceStream> mStream;

    58   uint32_t mCanvasFramebuffer;

    60   bool mIsGLAlphaPremult;

    61   bool mNeedsYFlip;

    63   RefPtr<gfx::DataSourceSurface> mCachedTempSurface;

    64   gfx::IntSize mCachedSize;

    65   gfx::SurfaceFormat mCachedFormat;

    67   gfx::DataSourceSurface* GetTempSurface(const gfx::IntSize& aSize,

    68                                          const gfx::SurfaceFormat aFormat);

    70   void DiscardTempSurface();

    71 };

    73 }

    74 }

    76 #endif

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