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       1             : /* -*- Mode: C++; tab-width: 20; 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 MOZILLA_GFX_SINGLETILEDCONTENTCLIENT_H
       7             : #define MOZILLA_GFX_SINGLETILEDCONTENTCLIENT_H
       8             : 
       9             : #include "TiledContentClient.h"
      10             : 
      11             : namespace mozilla {
      12             : namespace layers {
      13             : 
      14             : class ClientTiledPaintedLayer;
      15             : class ClientLayerManager;
      16             : 
      17             : /**
      18             :  * Provide an instance of TiledLayerBuffer backed by drawable TextureClients.
      19             :  * This buffer provides an implementation of ValidateTile using a
      20             :  * thebes callback and can support painting using a single paint buffer.
      21             :  * Whether a single paint buffer is used is controlled by
      22             :  * gfxPrefs::PerTileDrawing().
      23             :  */
      24             : class ClientSingleTiledLayerBuffer
      25             :   : public ClientTiledLayerBuffer
      26             :   , public TextureClientAllocator
      27             : {
      28           0 :   virtual ~ClientSingleTiledLayerBuffer() {}
      29             : public:
      30             :   ClientSingleTiledLayerBuffer(ClientTiledPaintedLayer& aPaintedLayer,
      31             :                                CompositableClient& aCompositableClient,
      32             :                                ClientLayerManager* aManager);
      33             : 
      34             :   // TextureClientAllocator
      35             :   already_AddRefed<TextureClient> GetTextureClient() override;
      36           0 :   void ReturnTextureClientDeferred(TextureClient* aClient) override {}
      37           0 :   void ReportClientLost() override {}
      38             : 
      39             :   // ClientTiledLayerBuffer
      40             :   void PaintThebes(const nsIntRegion& aNewValidRegion,
      41             :                    const nsIntRegion& aPaintRegion,
      42             :                    const nsIntRegion& aDirtyRegion,
      43             :                    LayerManager::DrawPaintedLayerCallback aCallback,
      44             :                    void* aCallbackData,
      45             :                    bool aIsProgressive = false) override;
      46             :  
      47           0 :   bool SupportsProgressiveUpdate() override { return false; }
      48           0 :   bool ProgressiveUpdate(const nsIntRegion& aValidRegion,
      49             :                          const nsIntRegion& aInvalidRegion,
      50             :                          const nsIntRegion& aOldValidRegion,
      51             :                          nsIntRegion& aOutDrawnRegion,
      52             :                          BasicTiledLayerPaintData* aPaintData,
      53             :                          LayerManager::DrawPaintedLayerCallback aCallback,
      54             :                          void* aCallbackData) override
      55             :   {
      56           0 :     MOZ_ASSERT(false, "ProgressiveUpdate not supported!");
      57             :     return false;
      58             :   }
      59             :   
      60           0 :   void ResetPaintedAndValidState() override {
      61           0 :     mPaintedRegion.SetEmpty();
      62           0 :     mValidRegion.SetEmpty();
      63           0 :     mTile.DiscardBuffers();
      64           0 :   }
      65             :   
      66           0 :   const nsIntRegion& GetValidRegion() override {
      67           0 :     return mValidRegion;
      68             :   }
      69             :   
      70           0 :   bool IsLowPrecision() const override {
      71           0 :     return false;
      72             :   }
      73             : 
      74             :   void ReleaseTiles();
      75             : 
      76             :   void DiscardBuffers();
      77             : 
      78             :   SurfaceDescriptorTiles GetSurfaceDescriptorTiles();
      79             : 
      80           0 :   void ClearPaintedRegion() {
      81           0 :     mPaintedRegion.SetEmpty();
      82           0 :   }
      83             : 
      84             : private:
      85             :   TileClient mTile;
      86             : 
      87             :   nsIntRegion mPaintedRegion;
      88             :   nsIntRegion mValidRegion;
      89             :   bool mWasLastPaintProgressive;
      90             : 
      91             :   /**
      92             :    * While we're adding tiles, this is used to keep track of the position of
      93             :    * the top-left of the top-left-most tile.  When we come to wrap the tiles in
      94             :    * TiledDrawTarget we subtract the value of this member from each tile's
      95             :    * offset so that all the tiles have a positive offset, then add a
      96             :    * translation to the TiledDrawTarget to compensate.  This is important so
      97             :    * that the mRect of the TiledDrawTarget is always at a positive x/y
      98             :    * position, otherwise its GetSize() methods will be broken.
      99             :    */
     100             :   gfx::IntPoint mTilingOrigin;
     101             :   gfx::IntSize mSize;
     102             :   gfxImageFormat mFormat;
     103             : };
     104             : 
     105             : class SingleTiledContentClient : public TiledContentClient
     106             : {
     107             : public:
     108             :   SingleTiledContentClient(ClientTiledPaintedLayer& aPaintedLayer,
     109             :                            ClientLayerManager* aManager);
     110             : 
     111             : protected:
     112           0 :   ~SingleTiledContentClient()
     113           0 :   {
     114           0 :     MOZ_COUNT_DTOR(SingleTiledContentClient);
     115             : 
     116           0 :     mTiledBuffer->ReleaseTiles();
     117           0 :   }
     118             : 
     119             : public:
     120             :   static bool ClientSupportsLayerSize(const gfx::IntSize& aSize, ClientLayerManager* aManager);
     121             : 
     122             :   virtual void ClearCachedResources() override;
     123             : 
     124             :   virtual void UpdatedBuffer(TiledBufferType aType) override;
     125             : 
     126           0 :   virtual ClientTiledLayerBuffer* GetTiledBuffer() override { return mTiledBuffer; }
     127           0 :   virtual ClientTiledLayerBuffer* GetLowPrecisionTiledBuffer() override { return nullptr; }
     128             : 
     129             : private:
     130             :   RefPtr<ClientSingleTiledLayerBuffer> mTiledBuffer;
     131             : };
     132             : 
     133             : }
     134             : }
     135             : 
     136             : #endif