1// Copyright 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CC_LAYERS_NINE_PATCH_LAYER_H_
6#define CC_LAYERS_NINE_PATCH_LAYER_H_
7
8#include "base/memory/scoped_ptr.h"
9#include "cc/base/cc_export.h"
10#include "cc/layers/layer.h"
11#include "cc/layers/ui_resource_layer.h"
12#include "cc/resources/ui_resource_client.h"
13#include "ui/gfx/rect.h"
14
15namespace cc {
16
17class LayerTreeHost;
18class ScopedUIResource;
19
20class CC_EXPORT NinePatchLayer : public UIResourceLayer {
21 public:
22  static scoped_refptr<NinePatchLayer> Create();
23
24  virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
25
26  // |border| is the space around the center rectangular region in layer space
27  // (known as aperture in image space).  |border.x()| and |border.y()| are the
28  // size of the left and top boundary, respectively.
29  // |border.width()-border.x()| and |border.height()-border.y()| are the size
30  // of the right and bottom boundary, respectively.
31  void SetBorder(const gfx::Rect& border);
32
33  // aperture is in the pixel space of the bitmap resource and refers to
34  // the center patch of the ninepatch (which is unused in this
35  // implementation). We split off eight rects surrounding it and stick them
36  // on the edges of the layer. The corners are unscaled, the top and bottom
37  // rects are x-stretched to fit, and the left and right rects are
38  // y-stretched to fit.
39  void SetAperture(const gfx::Rect& aperture);
40  void SetFillCenter(bool fill_center);
41
42 private:
43  NinePatchLayer();
44  virtual ~NinePatchLayer();
45  virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
46      OVERRIDE;
47
48  gfx::Rect border_;
49  bool fill_center_;
50
51  // The transparent center region that shows the parent layer's contents in
52  // image space.
53  gfx::Rect image_aperture_;
54
55  DISALLOW_COPY_AND_ASSIGN(NinePatchLayer);
56};
57
58}  // namespace cc
59
60#endif  // CC_LAYERS_NINE_PATCH_LAYER_H_
61