painted_scrollbar_layer_impl.cc revision 58537e28ecd584eab876aee8be7156509866d23a 
1// Copyright 2013 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#include "cc/layers/painted_scrollbar_layer_impl.h"
6
7#include <algorithm>
8
9#include "cc/animation/scrollbar_animation_controller.h"
10#include "cc/layers/layer.h"
11#include "cc/layers/quad_sink.h"
12#include "cc/quads/solid_color_draw_quad.h"
13#include "cc/quads/texture_draw_quad.h"
14#include "cc/trees/layer_tree_impl.h"
15#include "cc/trees/layer_tree_settings.h"
16#include "ui/gfx/rect_conversions.h"
17
18namespace cc {
19
20scoped_ptr<PaintedScrollbarLayerImpl> PaintedScrollbarLayerImpl::Create(
21    LayerTreeImpl* tree_impl,
22    int id,
23    ScrollbarOrientation orientation) {
24  return make_scoped_ptr(
25      new PaintedScrollbarLayerImpl(tree_impl, id, orientation));
26}
27
28PaintedScrollbarLayerImpl::PaintedScrollbarLayerImpl(
29    LayerTreeImpl* tree_impl,
30    int id,
31    ScrollbarOrientation orientation)
32    : ScrollbarLayerImplBase(tree_impl, id, orientation, false),
33      track_ui_resource_id_(0),
34      thumb_ui_resource_id_(0),
35      thumb_thickness_(0),
36      thumb_length_(0),
37      track_start_(0),
38      track_length_(0),
39      vertical_adjust_(0.f),
40      scroll_layer_id_(Layer::INVALID_ID) {}
41
42PaintedScrollbarLayerImpl::~PaintedScrollbarLayerImpl() {}
43
44scoped_ptr<LayerImpl> PaintedScrollbarLayerImpl::CreateLayerImpl(
45    LayerTreeImpl* tree_impl) {
46  return PaintedScrollbarLayerImpl::Create(tree_impl, id(), orientation())
47      .PassAs<LayerImpl>();
48}
49
50void PaintedScrollbarLayerImpl::PushPropertiesTo(LayerImpl* layer) {
51  ScrollbarLayerImplBase::PushPropertiesTo(layer);
52
53  PaintedScrollbarLayerImpl* scrollbar_layer =
54      static_cast<PaintedScrollbarLayerImpl*>(layer);
55
56  scrollbar_layer->SetThumbThickness(thumb_thickness_);
57  scrollbar_layer->SetThumbLength(thumb_length_);
58  scrollbar_layer->SetTrackStart(track_start_);
59  scrollbar_layer->SetTrackLength(track_length_);
60
61  scrollbar_layer->set_track_ui_resource_id(track_ui_resource_id_);
62  scrollbar_layer->set_thumb_ui_resource_id(thumb_ui_resource_id_);
63}
64
65bool PaintedScrollbarLayerImpl::WillDraw(DrawMode draw_mode,
66                                  ResourceProvider* resource_provider) {
67  DCHECK(draw_mode != DRAW_MODE_RESOURCELESS_SOFTWARE);
68  return LayerImpl::WillDraw(draw_mode, resource_provider);
69}
70
71void PaintedScrollbarLayerImpl::AppendQuads(
72    QuadSink* quad_sink,
73    AppendQuadsData* append_quads_data) {
74  bool premultipled_alpha = true;
75  bool flipped = false;
76  gfx::PointF uv_top_left(0.f, 0.f);
77  gfx::PointF uv_bottom_right(1.f, 1.f);
78  gfx::Rect bounds_rect(bounds());
79  gfx::Rect content_bounds_rect(content_bounds());
80
81  SharedQuadState* shared_quad_state =
82      quad_sink->UseSharedQuadState(CreateSharedQuadState());
83  AppendDebugBorderQuad(quad_sink, shared_quad_state, append_quads_data);
84
85  gfx::Rect thumb_quad_rect = ComputeThumbQuadRect();
86
87  ResourceProvider::ResourceId thumb_resource_id =
88      layer_tree_impl()->ResourceIdForUIResource(thumb_ui_resource_id_);
89  ResourceProvider::ResourceId track_resource_id =
90      layer_tree_impl()->ResourceIdForUIResource(track_ui_resource_id_);
91
92  if (thumb_resource_id && !thumb_quad_rect.IsEmpty()) {
93    gfx::Rect opaque_rect;
94    const float opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
95    scoped_ptr<TextureDrawQuad> quad = TextureDrawQuad::Create();
96    quad->SetNew(shared_quad_state,
97                 thumb_quad_rect,
98                 opaque_rect,
99                 thumb_resource_id,
100                 premultipled_alpha,
101                 uv_top_left,
102                 uv_bottom_right,
103                 SK_ColorTRANSPARENT,
104                 opacity,
105                 flipped);
106    quad_sink->Append(quad.PassAs<DrawQuad>(), append_quads_data);
107  }
108
109  gfx::Rect track_quad_rect = content_bounds_rect;
110  if (track_resource_id && !track_quad_rect.IsEmpty()) {
111    gfx::Rect opaque_rect(contents_opaque() ? track_quad_rect : gfx::Rect());
112    const float opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
113    scoped_ptr<TextureDrawQuad> quad = TextureDrawQuad::Create();
114    quad->SetNew(shared_quad_state,
115                 track_quad_rect,
116                 opaque_rect,
117                 track_resource_id,
118                 premultipled_alpha,
119                 uv_top_left,
120                 uv_bottom_right,
121                 SK_ColorTRANSPARENT,
122                 opacity,
123                 flipped);
124    quad_sink->Append(quad.PassAs<DrawQuad>(), append_quads_data);
125  }
126}
127
128void PaintedScrollbarLayerImpl::DidLoseOutputSurface() {
129  track_ui_resource_id_ = 0;
130  thumb_ui_resource_id_ = 0;
131}
132
133void PaintedScrollbarLayerImpl::SetThumbThickness(int thumb_thickness) {
134  if (thumb_thickness_ == thumb_thickness)
135    return;
136  thumb_thickness_ = thumb_thickness;
137  NoteLayerPropertyChanged();
138}
139
140int PaintedScrollbarLayerImpl::ThumbThickness() const {
141  return thumb_thickness_;
142}
143
144void PaintedScrollbarLayerImpl::SetThumbLength(int thumb_length) {
145  if (thumb_length_ == thumb_length)
146    return;
147  thumb_length_ = thumb_length;
148  NoteLayerPropertyChanged();
149}
150
151int PaintedScrollbarLayerImpl::ThumbLength() const {
152  return thumb_length_;
153}
154
155void PaintedScrollbarLayerImpl::SetTrackStart(int track_start) {
156  if (track_start_ == track_start)
157    return;
158  track_start_ = track_start;
159  NoteLayerPropertyChanged();
160}
161
162int PaintedScrollbarLayerImpl::TrackStart() const {
163  return track_start_;
164}
165
166void PaintedScrollbarLayerImpl::SetTrackLength(int track_length) {
167  if (track_length_ == track_length)
168    return;
169  track_length_ = track_length;
170  NoteLayerPropertyChanged();
171}
172
173float PaintedScrollbarLayerImpl::TrackLength() const {
174  return track_length_ + (orientation() == VERTICAL ? vertical_adjust() : 0);
175}
176
177const char* PaintedScrollbarLayerImpl::LayerTypeAsString() const {
178  return "cc::PaintedScrollbarLayerImpl";
179}
180
181}  // namespace cc
182