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_IMPL_H_
6#define CC_LAYERS_NINE_PATCH_LAYER_IMPL_H_
7
8#include <string>
9
10#include "cc/base/cc_export.h"
11#include "cc/layers/layer_impl.h"
12#include "cc/layers/ui_resource_layer_impl.h"
13#include "cc/resources/resource_provider.h"
14#include "cc/resources/ui_resource_client.h"
15#include "ui/gfx/rect.h"
16#include "ui/gfx/size.h"
17
18namespace base {
19class DictionaryValue;
20}
21
22namespace cc {
23
24class CC_EXPORT NinePatchLayerImpl : public UIResourceLayerImpl {
25 public:
26  static scoped_ptr<NinePatchLayerImpl> Create(LayerTreeImpl* tree_impl,
27                                               int id) {
28    return make_scoped_ptr(new NinePatchLayerImpl(tree_impl, id));
29  }
30  virtual ~NinePatchLayerImpl();
31
32  // The bitmap stretches out the bounds of the layer.  The following picture
33  // illustrates the parameters associated with the dimensions.
34  //
35  // Layer space layout              Bitmap space layout
36  //
37  // ------------------------       ~~~~~~~~~~ W ~~~~~~~~~~
38  // |          :           |       :     :                |
39  // |          C           |       :     Y                |
40  // |          :           |       :     :                |
41  // |     ------------     |       :~~X~~------------     |
42  // |     |          |     |       :     |          :     |
43  // |     |          |     |       :     |          :     |
44  // |~~A~~|          |~~B~~|       H     |          Q     |
45  // |     |          |     |       :     |          :     |
46  // |     ------------     |       :     ~~~~~P~~~~~      |
47  // |          :           |       :                      |
48  // |          D           |       :                      |
49  // |          :           |       :                      |
50  // ------------------------       ------------------------
51  //
52  // |image_bounds| = (W, H)
53  // |image_aperture| = (X, Y, P, Q)
54  // |border| = (A, C, A + B, C + D)
55  // |fill_center| indicates whether to draw the center quad or not.
56  void SetLayout(const gfx::Rect& image_aperture,
57                 const gfx::Rect& border,
58                 bool fill_center);
59
60  virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
61      OVERRIDE;
62  virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
63
64  virtual void AppendQuads(RenderPass* render_pass,
65                           const OcclusionTracker<LayerImpl>& occlusion_tracker,
66                           AppendQuadsData* append_quads_data) OVERRIDE;
67
68  virtual base::DictionaryValue* LayerTreeAsJson() const OVERRIDE;
69
70 protected:
71  NinePatchLayerImpl(LayerTreeImpl* tree_impl, int id);
72
73 private:
74  virtual const char* LayerTypeAsString() const OVERRIDE;
75
76  void CheckGeometryLimitations();
77
78  // The transparent center region that shows the parent layer's contents in
79  // image space.
80  gfx::Rect image_aperture_;
81
82  // An inset border that the patches will be mapped to.
83  gfx::Rect border_;
84
85  bool fill_center_;
86
87  DISALLOW_COPY_AND_ASSIGN(NinePatchLayerImpl);
88};
89
90}  // namespace cc
91
92#endif  // CC_LAYERS_NINE_PATCH_LAYER_IMPL_H_
93