android: content::UIResourceProvider and content::UIResourceClientAndroid

content/public/browser/android/ui_resource_provider.h

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_PUBLIC_BROWSER_ANDROID_UI_RESOURCE_PROVIDER_H_
+#define CONTENT_PUBLIC_BROWSER_ANDROID_UI_RESOURCE_PROVIDER_H_
+
+#include "cc/resources/ui_resource_client.h"
+#include "content/common/content_export.h"
+#include "skia/ext/refptr.h"
+
+class SkBitmap;
+class SkPixelRef;
+
+namespace cc {
+class LayerTreeHost;
+}
+
+namespace gfx {
+class Size;
+}
+
+namespace content {
+
+class UIResourceListener;
+
+class CONTENT_EXPORT UIResourceProvider {
+ public:
+  virtual ~UIResourceProvider() {}
+
+  virtual void SetLayerTreeHost(cc::LayerTreeHost* host) = 0;
+
+  virtual void AddListener(UIResourceListener* listener) = 0;
+
+  virtual void RemoveListener(UIResourceListener* listener) = 0;
+
+  // Generates a UIResource and returns a UIResourceId.  |is_transient|
+  // indicates whether or not to release the resource once the bitmap
+  // has been uploaded. May return 0.
+  virtual cc::UIResourceId GenerateUIResource(const SkBitmap& bitmap,
+                                              bool is_transient) = 0;
+
+  // Generates an ETC1 compressed UIResource.  See above for |is_transient|.
+  // May return 0.
+  virtual cc::UIResourceId GenerateCompressedUIResource(
+      const skia::RefPtr<SkPixelRef>& pixel_ref,
+      bool is_transient) = 0;
+
+  // Same as above method but makes a copy of |pixels|.
+  // TODO(powei): should be removed once the thumbnail work is in place.
+  virtual cc::UIResourceId GenerateCompressedUIResource(const gfx::Size& size,
+                                                        void* pixels,
+                                                        bool is_transient) = 0;
+
+  // Deletes a UIResource.  Deleting a non-existent resource is allowed.
+  virtual void DeleteUIResource(cc::UIResourceId resource_id) = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_ANDROID_UI_RESOURCE_PROVIDER_H_