Generic UIResourceLayer for shared resources.

Separated the UIResource management from the
NinePatchLayer because we need it for other
things as well.

BUG=235290

Review URL: https://codereview.chromium.org/24716003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226908 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 59 insertions, 0 deletions

diff --git a/cc/layers/ui_resource_layer.h b/cc/layers/ui_resource_layer.h
new file mode 100644
index 0000000..173ca44
--- /dev/null
+++ b/cc/layers/ui_resource_layer.h
@@ -0,0 +1,59 @@
+// 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 CC_LAYERS_UI_RESOURCE_LAYER_H_
+#define CC_LAYERS_UI_RESOURCE_LAYER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "cc/base/cc_export.h"
+#include "cc/layers/layer.h"
+#include "cc/resources/ui_resource_client.h"
+#include "ui/gfx/rect.h"
+
+namespace cc {
+
+class LayerTreeHost;
+class ScopedUIResource;
+
+class CC_EXPORT UIResourceLayer : public Layer {
+ public:
+  static scoped_refptr<UIResourceLayer> Create();
+
+  virtual bool DrawsContent() const OVERRIDE;
+
+  virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
+
+  virtual void SetLayerTreeHost(LayerTreeHost* host) OVERRIDE;
+
+  void SetBitmap(const SkBitmap& skbitmap);
+
+  // An alternative way of setting the resource to allow for sharing.
+  void SetUIResourceId(UIResourceId resource_id);
+
+  class UIResourceHolder {
+   public:
+    virtual UIResourceId id() = 0;
+    virtual ~UIResourceHolder();
+  };
+
+ protected:
+  UIResourceLayer();
+  virtual ~UIResourceLayer();
+
+  scoped_ptr<UIResourceHolder> ui_resource_holder_;
+  SkBitmap bitmap_;
+
+ private:
+  virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
+      OVERRIDE;
+  void RecreateUIResourceHolder();
+
+
+
+  DISALLOW_COPY_AND_ASSIGN(UIResourceLayer);
+};
+
+}  // namespace cc
+
+#endif  // CC_LAYERS_UI_RESOURCE_LAYER_H_