1 files changed, 81 insertions, 0 deletions
diff --git a/gfx/layers/composite/CanvasLayerComposite.h b/gfx/layers/composite/CanvasLayerComposite.h
new file mode 100644
index 000000000..0042d9027
--- /dev/null
+++ b/gfx/layers/composite/CanvasLayerComposite.h
@@ -0,0 +1,81 @@
+/* -*- 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 GFX_CanvasLayerComposite_H
+#define GFX_CanvasLayerComposite_H
+
+#include "Layers.h"                     // for CanvasLayer, etc
+#include "mozilla/Attributes.h"         // for override
+#include "mozilla/RefPtr.h"             // for RefPtr
+#include "mozilla/layers/LayerManagerComposite.h"  // for LayerComposite, etc
+#include "mozilla/layers/LayersTypes.h"  // for LayerRenderState, etc
+#include "nsDebug.h"                    // for NS_RUNTIMEABORT
+#include "nsRect.h"                     // for mozilla::gfx::IntRect
+#include "nscore.h"                     // for nsACString
+
+namespace mozilla {
+namespace layers {
+
+class CompositableHost;
+// Canvas layers use ImageHosts (but CanvasClients) because compositing a
+// canvas is identical to compositing an image.
+class ImageHost;
+
+class CanvasLayerComposite : public CanvasLayer,
+                             public LayerComposite
+{
+public:
+  explicit CanvasLayerComposite(LayerManagerComposite* aManager);
+
+protected:
+  virtual ~CanvasLayerComposite();
+
+public:
+  // CanvasLayer impl
+  virtual void Initialize(const Data& aData) override
+  {
+    NS_RUNTIMEABORT("Incompatibe surface type");
+  }
+
+  virtual LayerRenderState GetRenderState() override;
+
+  virtual bool SetCompositableHost(CompositableHost* aHost) override;
+
+  virtual void Disconnect() override
+  {
+    Destroy();
+  }
+
+  virtual void SetLayerManager(LayerManagerComposite* aManager) override;
+
+  virtual Layer* GetLayer() override;
+  virtual void RenderLayer(const gfx::IntRect& aClipRect) override;
+
+  virtual void CleanupResources() override;
+
+  virtual void GenEffectChain(EffectChain& aEffect) override;
+
+  CompositableHost* GetCompositableHost() override;
+
+  virtual LayerComposite* AsLayerComposite() override { return this; }
+
+  void SetBounds(gfx::IntRect aBounds) { mBounds = aBounds; }
+
+  virtual const char* Name() const override { return "CanvasLayerComposite"; }
+
+protected:
+  virtual void PrintInfo(std::stringstream& aStream, const char* aPrefix) override;
+
+private:
+  gfx::SamplingFilter GetSamplingFilter();
+
+private:
+  RefPtr<CompositableHost> mCompositableHost;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif /* GFX_CanvasLayerComposite_H */