1 files changed, 135 insertions, 0 deletions
diff --git a/gfx/layers/client/SingleTiledContentClient.h b/gfx/layers/client/SingleTiledContentClient.h
new file mode 100644
index 000000000..e1706bd90
--- /dev/null
+++ b/gfx/layers/client/SingleTiledContentClient.h
@@ -0,0 +1,135 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MOZILLA_GFX_SINGLETILEDCONTENTCLIENT_H
+#define MOZILLA_GFX_SINGLETILEDCONTENTCLIENT_H
+
+#include "TiledContentClient.h"
+
+namespace mozilla {
+namespace layers {
+
+class ClientTiledPaintedLayer;
+class ClientLayerManager;
+
+/**
+ * Provide an instance of TiledLayerBuffer backed by drawable TextureClients.
+ * This buffer provides an implementation of ValidateTile using a
+ * thebes callback and can support painting using a single paint buffer.
+ * Whether a single paint buffer is used is controlled by
+ * gfxPrefs::PerTileDrawing().
+ */
+class ClientSingleTiledLayerBuffer
+  : public ClientTiledLayerBuffer
+  , public TextureClientAllocator
+{
+  virtual ~ClientSingleTiledLayerBuffer() {}
+public:
+  ClientSingleTiledLayerBuffer(ClientTiledPaintedLayer& aPaintedLayer,
+                               CompositableClient& aCompositableClient,
+                               ClientLayerManager* aManager);
+
+  // TextureClientAllocator
+  already_AddRefed<TextureClient> GetTextureClient() override;
+  void ReturnTextureClientDeferred(TextureClient* aClient) override {}
+  void ReportClientLost() override {}
+
+  // ClientTiledLayerBuffer
+  void PaintThebes(const nsIntRegion& aNewValidRegion,
+                   const nsIntRegion& aPaintRegion,
+                   const nsIntRegion& aDirtyRegion,
+                   LayerManager::DrawPaintedLayerCallback aCallback,
+                   void* aCallbackData,
+                   bool aIsProgressive = false) override;
+ 
+  bool SupportsProgressiveUpdate() override { return false; }
+  bool ProgressiveUpdate(nsIntRegion& aValidRegion,
+                         nsIntRegion& aInvalidRegion,
+                         const nsIntRegion& aOldValidRegion,
+                         BasicTiledLayerPaintData* aPaintData,
+                         LayerManager::DrawPaintedLayerCallback aCallback,
+                         void* aCallbackData) override
+  {
+    MOZ_ASSERT(false, "ProgressiveUpdate not supported!");
+    return false;
+  }
+  
+  void ResetPaintedAndValidState() override {
+    mPaintedRegion.SetEmpty();
+    mValidRegion.SetEmpty();
+    mTile.DiscardBuffers();
+  }
+  
+  const nsIntRegion& GetValidRegion() override {
+    return mValidRegion;
+  }
+  
+  bool IsLowPrecision() const override {
+    return false;
+  }
+
+  void ReleaseTiles();
+
+  void DiscardBuffers();
+
+  SurfaceDescriptorTiles GetSurfaceDescriptorTiles();
+
+  void ClearPaintedRegion() {
+    mPaintedRegion.SetEmpty();
+  }
+
+private:
+  TileClient mTile;
+
+  nsIntRegion mPaintedRegion;
+  nsIntRegion mValidRegion;
+  bool mWasLastPaintProgressive;
+
+  /**
+   * While we're adding tiles, this is used to keep track of the position of
+   * the top-left of the top-left-most tile.  When we come to wrap the tiles in
+   * TiledDrawTarget we subtract the value of this member from each tile's
+   * offset so that all the tiles have a positive offset, then add a
+   * translation to the TiledDrawTarget to compensate.  This is important so
+   * that the mRect of the TiledDrawTarget is always at a positive x/y
+   * position, otherwise its GetSize() methods will be broken.
+   */
+  gfx::IntPoint mTilingOrigin;
+  gfx::IntSize mSize;
+  gfxImageFormat mFormat;
+};
+
+class SingleTiledContentClient : public TiledContentClient
+{
+public:
+  SingleTiledContentClient(ClientTiledPaintedLayer& aPaintedLayer,
+                           ClientLayerManager* aManager);
+
+protected:
+  ~SingleTiledContentClient()
+  {
+    MOZ_COUNT_DTOR(SingleTiledContentClient);
+
+    mTiledBuffer->ReleaseTiles();
+  }
+
+public:
+  static bool ClientSupportsLayerSize(const gfx::IntSize& aSize, ClientLayerManager* aManager);
+
+  virtual void ClearCachedResources() override;
+
+  virtual void UpdatedBuffer(TiledBufferType aType) override;
+
+  virtual ClientTiledLayerBuffer* GetTiledBuffer() override { return mTiledBuffer; }
+  virtual ClientTiledLayerBuffer* GetLowPrecisionTiledBuffer() override { return nullptr; }
+
+private:
+  RefPtr<ClientSingleTiledLayerBuffer> mTiledBuffer;
+};
+
+}
+}
+
+#endif