gfx/layers/client/ClientCanvasLayer.h

   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_CLIENTCANVASLAYER_H
   7 #define GFX_CLIENTCANVASLAYER_H
   8
   9 #include "mozilla/layers/CanvasClient.h"  // for CanvasClient, etc
  10 #include "ClientLayerManager.h"         // for ClientLayerManager, etc
  11 #include "CopyableCanvasLayer.h"        // for CopyableCanvasLayer
  12 #include "Layers.h"                     // for CanvasLayer, etc
  13 #include "mozilla/Attributes.h"         // for MOZ_OVERRIDE
  14 #include "mozilla/RefPtr.h"             // for RefPtr
  15 #include "mozilla/layers/LayersMessages.h"  // for CanvasLayerAttributes, etc
  16 #include "mozilla/mozalloc.h"           // for operator delete
  17 #include "nsAutoPtr.h"                  // for nsRefPtr
  18 #include "nsDebug.h"                    // for NS_ASSERTION
  19 #include "nsRegion.h"                   // for nsIntRegion
  20 #include "nsTraceRefcnt.h"              // for MOZ_COUNT_CTOR, etc
  21
  22 using namespace mozilla::gfx;
  23
  24 namespace mozilla {
  25 namespace layers {
  26
  27 class CompositableClient;
  28 class ShadowableLayer;
  29
  30 class ClientCanvasLayer : public CopyableCanvasLayer,
  31                           public ClientLayer
  32 {
  33   typedef CanvasClient::CanvasClientType CanvasClientType;
  34 public:
  35   ClientCanvasLayer(ClientLayerManager* aLayerManager) :
  36     CopyableCanvasLayer(aLayerManager,
  37                         static_cast<ClientLayer*>(MOZ_THIS_IN_INITIALIZER_LIST()))
  38   {
  39     MOZ_COUNT_CTOR(ClientCanvasLayer);
  40   }
  41   virtual ~ClientCanvasLayer()
  42   {
  43     MOZ_COUNT_DTOR(ClientCanvasLayer);
  44     if (mCanvasClient) {
  45       mCanvasClient->OnDetach();
  46       mCanvasClient = nullptr;
  47     }
  48   }
  49
  50   virtual void SetVisibleRegion(const nsIntRegion& aRegion)
  51   {
  52     NS_ASSERTION(ClientManager()->InConstruction(),
  53                  "Can only set properties in construction phase");
  54     CanvasLayer::SetVisibleRegion(aRegion);
  55   }
  56
  57   virtual void Initialize(const Data& aData);
  58
  59   virtual void RenderLayer();
  60
  61   virtual void FillSpecificAttributes(SpecificLayerAttributes& aAttrs)
  62   {
  63     aAttrs = CanvasLayerAttributes(mFilter, mBounds);
  64   }
  65
  66   virtual Layer* AsLayer() { return this; }
  67   virtual ShadowableLayer* AsShadowableLayer() { return this; }
  68
  69   virtual void Disconnect()
  70   {
  71     mCanvasClient = nullptr;
  72     ClientLayer::Disconnect();
  73   }
  74
  75   virtual CompositableClient* GetCompositableClient() MOZ_OVERRIDE
  76   {
  77     return mCanvasClient;
  78   }
  79 protected:
  80   ClientLayerManager* ClientManager()
  81   {
  82     return static_cast<ClientLayerManager*>(mManager);
  83   }
  84
  85   CanvasClientType GetCanvasClientType()
  86   {
  87     if (mGLContext) {
  88       return CanvasClient::CanvasClientGLContext;
  89     }
  90     return CanvasClient::CanvasClientSurface;
  91   }
  92
  93   RefPtr<CanvasClient> mCanvasClient;
  94
  95   friend class DeprecatedCanvasClient2D;
  96   friend class CanvasClient2D;
  97   friend class DeprecatedCanvasClientSurfaceStream;
  98 };
  99 }
 100 }
 101
 102 #endif