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+// Copyright 2012 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_NINE_PATCH_LAYER_H_
+#define CC_LAYERS_NINE_PATCH_LAYER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "cc/base/cc_export.h"
+#include "cc/layers/layer.h"
+#include "cc/resources/image_layer_updater.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/gfx/rect.h"
+
+namespace cc {
+
+class ResourceUpdateQueue;
+
+class CC_EXPORT NinePatchLayer : public Layer {
+ public:
+ static scoped_refptr<NinePatchLayer> Create();
+
+ virtual bool DrawsContent() const OVERRIDE;
+ virtual void SetTexturePriorities(const PriorityCalculator& priority_calc)
+ OVERRIDE;
+ virtual void Update(ResourceUpdateQueue* queue,
+ const OcclusionTracker* occlusion,
+ RenderingStats* stats) OVERRIDE;
+ virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
+
+ // aperture is in the pixel space of the bitmap resource and refers to
+ // the center patch of the ninepatch (which is unused in this
+ // implementation). We split off eight rects surrounding it and stick them
+ // on the edges of the layer. The corners are unscaled, the top and bottom
+ // rects are x-stretched to fit, and the left and right rects are
+ // y-stretched to fit.
+ void SetBitmap(const SkBitmap& bitmap, gfx::Rect aperture);
+
+ private:
+ NinePatchLayer();
+ virtual ~NinePatchLayer();
+ virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
+ OVERRIDE;
+
+ void CreateUpdaterIfNeeded();
+ void CreateResource();
+
+ scoped_refptr<ImageLayerUpdater> updater_;
+ scoped_ptr<LayerUpdater::Resource> resource_;
+
+ SkBitmap bitmap_;
+ bool bitmap_dirty_;
+
+ // The transparent center region that shows the parent layer's contents in
+ // image space.
+ gfx::Rect image_aperture_;
+};
+
+} // namespace cc
+
+#endif // CC_LAYERS_NINE_PATCH_LAYER_H_