gfx/layers/client/ClientThebesLayer.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_CLIENTTHEBESLAYER_H
   7 #define GFX_CLIENTTHEBESLAYER_H
   8
   9 #include "ClientLayerManager.h"
  10 #include "ThebesLayerBuffer.h"
  11 #include "mozilla/layers/ContentClient.h"
  12
  13 namespace mozilla {
  14 namespace layers {
  15
  16 class ClientThebesLayer : public ThebesLayer,
  17                           public ClientLayer {
  18 public:
  19   typedef ThebesLayerBuffer::PaintState PaintState;
  20   typedef ThebesLayerBuffer::ContentType ContentType;
  21
  22   ClientThebesLayer(ClientLayerManager* aLayerManager) :
  23     ThebesLayer(aLayerManager, static_cast<ClientLayer*>(this)),
  24     mContentClient(nullptr)
  25   {
  26     MOZ_COUNT_CTOR(ClientThebesLayer);
  27   }
  28   virtual ~ClientThebesLayer()
  29   {
  30     if (mContentClient) {
  31       mContentClient->Detach();
  32       mContentClient = nullptr;
  33     }
  34     MOZ_COUNT_DTOR(ClientThebesLayer);
  35   }
  36
  37   virtual void SetVisibleRegion(const nsIntRegion& aRegion)
  38   {
  39     NS_ASSERTION(ClientManager()->InConstruction(),
  40                  "Can only set properties in construction phase");
  41     ThebesLayer::SetVisibleRegion(aRegion);
  42   }
  43   virtual void InvalidateRegion(const nsIntRegion& aRegion)
  44   {
  45     NS_ASSERTION(ClientManager()->InConstruction(),
  46                  "Can only set properties in construction phase");
  47     mInvalidRegion.Or(mInvalidRegion, aRegion);
  48     mInvalidRegion.SimplifyOutward(10);
  49     mValidRegion.Sub(mValidRegion, mInvalidRegion);
  50   }
  51
  52   virtual void RenderLayer();
  53
  54   virtual void ClearCachedResources()
  55   {
  56     if (mContentClient) {
  57       mContentClient->Clear();
  58     }
  59     mValidRegion.SetEmpty();
  60     DestroyBackBuffer();
  61   }
  62
  63   virtual void FillSpecificAttributes(SpecificLayerAttributes& aAttrs)
  64   {
  65     aAttrs = ThebesLayerAttributes(GetValidRegion());
  66   }
  67
  68   ClientLayerManager* ClientManager()
  69   {
  70     return static_cast<ClientLayerManager*>(mManager);
  71   }
  72
  73   virtual Layer* AsLayer() { return this; }
  74   virtual ShadowableLayer* AsShadowableLayer() { return this; }
  75
  76   virtual CompositableClient* GetCompositableClient() MOZ_OVERRIDE
  77   {
  78     return mContentClient;
  79   }
  80
  81   virtual void Disconnect()
  82   {
  83     mContentClient = nullptr;
  84     ClientLayer::Disconnect();
  85   }
  86
  87 protected:
  88   void
  89   PaintBuffer(gfxContext* aContext,
  90               const nsIntRegion& aRegionToDraw,
  91               const nsIntRegion& aExtendedRegionToDraw,
  92               const nsIntRegion& aRegionToInvalidate,
  93               bool aDidSelfCopy);
  94
  95   void PaintThebes();
  96
  97   void DestroyBackBuffer()
  98   {
  99     mContentClient = nullptr;
 100   }
 101
 102   RefPtr<ContentClient> mContentClient;
 103 };
 104
 105 }
 106 }
 107
 108 #endif