1 // Copyright 2010 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/content_layer.h"
6
7 #include "base/auto_reset.h"
8 #include "base/metrics/histogram.h"
9 #include "base/time/time.h"
10 #include "cc/layers/content_layer_client.h"
11 #include "cc/resources/bitmap_content_layer_updater.h"
12 #include "cc/resources/bitmap_skpicture_content_layer_updater.h"
13 #include "cc/resources/layer_painter.h"
14 #include "cc/trees/layer_tree_host.h"
15 #include "third_party/skia/include/core/SkPictureRecorder.h"
16
17 namespace cc {
18
ContentLayerPainter(ContentLayerClient * client)19 ContentLayerPainter::ContentLayerPainter(ContentLayerClient* client)
20 : client_(client) {}
21
Create(ContentLayerClient * client)22 scoped_ptr<ContentLayerPainter> ContentLayerPainter::Create(
23 ContentLayerClient* client) {
24 return make_scoped_ptr(new ContentLayerPainter(client));
25 }
26
Paint(SkCanvas * canvas,const gfx::Rect & content_rect,gfx::RectF * opaque)27 void ContentLayerPainter::Paint(SkCanvas* canvas,
28 const gfx::Rect& content_rect,
29 gfx::RectF* opaque) {
30 client_->PaintContents(canvas,
31 content_rect,
32 opaque,
33 ContentLayerClient::GRAPHICS_CONTEXT_ENABLED);
34 }
35
Create(ContentLayerClient * client)36 scoped_refptr<ContentLayer> ContentLayer::Create(ContentLayerClient* client) {
37 return make_scoped_refptr(new ContentLayer(client));
38 }
39
ContentLayer(ContentLayerClient * client)40 ContentLayer::ContentLayer(ContentLayerClient* client)
41 : TiledLayer(),
42 client_(client),
43 can_use_lcd_text_last_frame_(can_use_lcd_text()) {
44 }
45
~ContentLayer()46 ContentLayer::~ContentLayer() {}
47
DrawsContent() const48 bool ContentLayer::DrawsContent() const {
49 return TiledLayer::DrawsContent() && client_;
50 }
51
SetLayerTreeHost(LayerTreeHost * host)52 void ContentLayer::SetLayerTreeHost(LayerTreeHost* host) {
53 TiledLayer::SetLayerTreeHost(host);
54
55 if (!updater_.get())
56 return;
57
58 if (host) {
59 updater_->set_rendering_stats_instrumentation(
60 host->rendering_stats_instrumentation());
61 } else {
62 updater_->set_rendering_stats_instrumentation(NULL);
63 }
64 }
65
SetTexturePriorities(const PriorityCalculator & priority_calc)66 void ContentLayer::SetTexturePriorities(
67 const PriorityCalculator& priority_calc) {
68 // Update the tile data before creating all the layer's tiles.
69 UpdateTileSizeAndTilingOption();
70
71 TiledLayer::SetTexturePriorities(priority_calc);
72 }
73
Update(ResourceUpdateQueue * queue,const OcclusionTracker<Layer> * occlusion)74 bool ContentLayer::Update(ResourceUpdateQueue* queue,
75 const OcclusionTracker<Layer>* occlusion) {
76 {
77 base::AutoReset<bool> ignore_set_needs_commit(&ignore_set_needs_commit_,
78 true);
79
80 CreateUpdaterIfNeeded();
81 UpdateCanUseLCDText();
82 }
83
84 bool updated = TiledLayer::Update(queue, occlusion);
85 return updated;
86 }
87
NeedMoreUpdates()88 bool ContentLayer::NeedMoreUpdates() {
89 return NeedsIdlePaint();
90 }
91
Updater() const92 LayerUpdater* ContentLayer::Updater() const {
93 return updater_.get();
94 }
95
CreateUpdaterIfNeeded()96 void ContentLayer::CreateUpdaterIfNeeded() {
97 if (updater_.get())
98 return;
99 scoped_ptr<LayerPainter> painter =
100 ContentLayerPainter::Create(client_).PassAs<LayerPainter>();
101 if (layer_tree_host()->settings().per_tile_painting_enabled) {
102 updater_ = BitmapSkPictureContentLayerUpdater::Create(
103 painter.Pass(),
104 rendering_stats_instrumentation(),
105 id());
106 } else {
107 updater_ = BitmapContentLayerUpdater::Create(
108 painter.Pass(),
109 rendering_stats_instrumentation(),
110 id());
111 }
112 updater_->SetOpaque(contents_opaque());
113 if (client_)
114 updater_->SetFillsBoundsCompletely(client_->FillsBoundsCompletely());
115
116 SetTextureFormat(
117 layer_tree_host()->GetRendererCapabilities().best_texture_format);
118 }
119
SetContentsOpaque(bool opaque)120 void ContentLayer::SetContentsOpaque(bool opaque) {
121 Layer::SetContentsOpaque(opaque);
122 if (updater_.get())
123 updater_->SetOpaque(opaque);
124 }
125
UpdateCanUseLCDText()126 void ContentLayer::UpdateCanUseLCDText() {
127 if (can_use_lcd_text_last_frame_ == can_use_lcd_text())
128 return;
129
130 can_use_lcd_text_last_frame_ = can_use_lcd_text();
131 if (client_)
132 client_->DidChangeLayerCanUseLCDText();
133 }
134
SupportsLCDText() const135 bool ContentLayer::SupportsLCDText() const {
136 return true;
137 }
138
GetPicture() const139 skia::RefPtr<SkPicture> ContentLayer::GetPicture() const {
140 if (!DrawsContent())
141 return skia::RefPtr<SkPicture>();
142
143 int width = bounds().width();
144 int height = bounds().height();
145 gfx::RectF opaque;
146
147 SkPictureRecorder recorder;
148 SkCanvas* canvas = recorder.beginRecording(width, height, NULL, 0);
149 client_->PaintContents(canvas,
150 gfx::Rect(width, height),
151 &opaque,
152 ContentLayerClient::GRAPHICS_CONTEXT_ENABLED);
153 skia::RefPtr<SkPicture> picture = skia::AdoptRef(recorder.endRecording());
154 return picture;
155 }
156
OnOutputSurfaceCreated()157 void ContentLayer::OnOutputSurfaceCreated() {
158 SetTextureFormat(
159 layer_tree_host()->GetRendererCapabilities().best_texture_format);
160 TiledLayer::OnOutputSurfaceCreated();
161 }
162
163 } // namespace cc
164