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

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

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

     3  * You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #ifndef GFX_CLIENTTILEDTHEBESLAYER_H

     6 #define GFX_CLIENTTILEDTHEBESLAYER_H

     8 #include "ClientLayerManager.h"         // for ClientLayer, etc

     9 #include "Layers.h"                     // for ThebesLayer, etc

    10 #include "mozilla/RefPtr.h"             // for RefPtr

    11 #include "mozilla/layers/TiledContentClient.h"

    12 #include "nsDebug.h"                    // for NS_RUNTIMEABORT

    13 #include "nsRegion.h"                   // for nsIntRegion

    15 class gfxContext;

    17 namespace mozilla {

    18 namespace layers {

    20 class ShadowableLayer;

    21 class SpecificLayerAttributes;

    23 /**

    24  * An implementation of ThebesLayer that ONLY supports remote

    25  * composition that is backed by tiles. This thebes layer implementation

    26  * is better suited to mobile hardware to work around slow implementation

    27  * of glTexImage2D (for OGL compositors), and restrait memory bandwidth.

    28  *

    29  * Tiled Thebes layers use a different protocol compared with other

    30  * layers. A copy of the tiled buffer is made and sent to the compositing

    31  * thread via the layers protocol. Tiles are uploaded by the buffers

    32  * asynchonously without using IPC, that means they are not safe for cross-

    33  * process use (bug 747811). Each tile has a TextureHost/Client pair but

    34  * they communicate directly rather than using the Texture protocol.

    35  *

    36  * There is no ContentClient for tiled layers. There is a ContentHost, however.

    37  */

    38 class ClientTiledThebesLayer : public ThebesLayer,

    39                                public ClientLayer

    40 {

    41   typedef ThebesLayer Base;

    43 public:

    44   ClientTiledThebesLayer(ClientLayerManager* const aManager);

    45   ~ClientTiledThebesLayer();

    47   // Override name to distinguish it from ClientThebesLayer in layer dumps

    48   virtual const char* Name() const { return "TiledThebesLayer"; }

    50   // Thebes Layer

    51   virtual Layer* AsLayer() { return this; }

    52   virtual void InvalidateRegion(const nsIntRegion& aRegion) {

    53     mInvalidRegion.Or(mInvalidRegion, aRegion);

    54     mValidRegion.Sub(mValidRegion, aRegion);

    55     mLowPrecisionValidRegion.Sub(mLowPrecisionValidRegion, aRegion);

    56   }

    58   // Shadow methods

    59   virtual void FillSpecificAttributes(SpecificLayerAttributes& aAttrs);

    60   virtual ShadowableLayer* AsShadowableLayer() { return this; }

    62   virtual void Disconnect()

    63   {

    64     ClientLayer::Disconnect();

    65   }

    67   virtual void RenderLayer();

    69   virtual void ClearCachedResources() MOZ_OVERRIDE;

    71 private:

    72   ClientLayerManager* ClientManager()

    73   {

    74     return static_cast<ClientLayerManager*>(mManager);

    75   }

    77   /**

    78    * For the initial PaintThebes of a transaction, calculates all the data

    79    * needed for that paint and any repeated transactions.

    80    */

    81   void BeginPaint();

    83   /**

    84    * When a paint ends, updates any data necessary to persist until the next

    85    * paint. If aFinish is true, this will cause the paint to be marked as

    86    * finished.

    87    */

    88   void EndPaint(bool aFinish);

    90   RefPtr<TiledContentClient> mContentClient;

    91   nsIntRegion mLowPrecisionValidRegion;

    92   BasicTiledLayerPaintData mPaintData;

    93 };

    95 } // layers

    96 } // mozilla

    98 #endif

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