1 // Copyright 2011 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/resources/bitmap_content_layer_updater.h"
6
7 #include "cc/debug/devtools_instrumentation.h"
8 #include "cc/debug/rendering_stats_instrumentation.h"
9 #include "cc/resources/layer_painter.h"
10 #include "cc/resources/prioritized_resource.h"
11 #include "cc/resources/resource_update.h"
12 #include "cc/resources/resource_update_queue.h"
13 #include "skia/ext/platform_canvas.h"
14
15 namespace cc {
16
Resource(BitmapContentLayerUpdater * updater,scoped_ptr<PrioritizedResource> texture)17 BitmapContentLayerUpdater::Resource::Resource(
18 BitmapContentLayerUpdater* updater,
19 scoped_ptr<PrioritizedResource> texture)
20 : LayerUpdater::Resource(texture.Pass()), updater_(updater) {}
21
~Resource()22 BitmapContentLayerUpdater::Resource::~Resource() {}
23
Update(ResourceUpdateQueue * queue,const gfx::Rect & source_rect,const gfx::Vector2d & dest_offset,bool partial_update)24 void BitmapContentLayerUpdater::Resource::Update(
25 ResourceUpdateQueue* queue,
26 const gfx::Rect& source_rect,
27 const gfx::Vector2d& dest_offset,
28 bool partial_update) {
29 updater_->UpdateTexture(
30 queue, texture(), source_rect, dest_offset, partial_update);
31 }
32
Create(scoped_ptr<LayerPainter> painter,RenderingStatsInstrumentation * stats_instrumentation,int layer_id)33 scoped_refptr<BitmapContentLayerUpdater> BitmapContentLayerUpdater::Create(
34 scoped_ptr<LayerPainter> painter,
35 RenderingStatsInstrumentation* stats_instrumentation,
36 int layer_id) {
37 return make_scoped_refptr(
38 new BitmapContentLayerUpdater(painter.Pass(),
39 stats_instrumentation,
40 layer_id));
41 }
42
BitmapContentLayerUpdater(scoped_ptr<LayerPainter> painter,RenderingStatsInstrumentation * stats_instrumentation,int layer_id)43 BitmapContentLayerUpdater::BitmapContentLayerUpdater(
44 scoped_ptr<LayerPainter> painter,
45 RenderingStatsInstrumentation* stats_instrumentation,
46 int layer_id)
47 : ContentLayerUpdater(painter.Pass(), stats_instrumentation, layer_id) {}
48
~BitmapContentLayerUpdater()49 BitmapContentLayerUpdater::~BitmapContentLayerUpdater() {}
50
CreateResource(PrioritizedResourceManager * manager)51 scoped_ptr<LayerUpdater::Resource> BitmapContentLayerUpdater::CreateResource(
52 PrioritizedResourceManager* manager) {
53 return scoped_ptr<LayerUpdater::Resource>(
54 new Resource(this, PrioritizedResource::Create(manager)));
55 }
56
PrepareToUpdate(const gfx::Rect & content_rect,const gfx::Size & tile_size,float contents_width_scale,float contents_height_scale,gfx::Rect * resulting_opaque_rect)57 void BitmapContentLayerUpdater::PrepareToUpdate(
58 const gfx::Rect& content_rect,
59 const gfx::Size& tile_size,
60 float contents_width_scale,
61 float contents_height_scale,
62 gfx::Rect* resulting_opaque_rect) {
63 if (canvas_size_ != content_rect.size()) {
64 devtools_instrumentation::ScopedLayerTask paint_setup(
65 devtools_instrumentation::kPaintSetup, layer_id_);
66 canvas_size_ = content_rect.size();
67 bool alloc = bitmap_backing_.allocN32Pixels(
68 canvas_size_.width(), canvas_size_.height(), layer_is_opaque_);
69 // TODO(danak): Remove when skia does the check for us: crbug.com/360384
70 CHECK(alloc);
71 canvas_ = skia::AdoptRef(new SkCanvas(bitmap_backing_));
72 DCHECK_EQ(content_rect.width(), canvas_->getBaseLayerSize().width());
73 DCHECK_EQ(content_rect.height(), canvas_->getBaseLayerSize().height());
74 }
75
76 base::TimeTicks start_time =
77 rendering_stats_instrumentation_->StartRecording();
78 PaintContents(canvas_.get(),
79 content_rect,
80 contents_width_scale,
81 contents_height_scale,
82 resulting_opaque_rect);
83 base::TimeDelta duration =
84 rendering_stats_instrumentation_->EndRecording(start_time);
85 rendering_stats_instrumentation_->AddPaint(
86 duration,
87 content_rect.width() * content_rect.height());
88 }
89
UpdateTexture(ResourceUpdateQueue * queue,PrioritizedResource * texture,const gfx::Rect & source_rect,const gfx::Vector2d & dest_offset,bool partial_update)90 void BitmapContentLayerUpdater::UpdateTexture(ResourceUpdateQueue* queue,
91 PrioritizedResource* texture,
92 const gfx::Rect& source_rect,
93 const gfx::Vector2d& dest_offset,
94 bool partial_update) {
95 CHECK(canvas_);
96 ResourceUpdate upload = ResourceUpdate::Create(texture,
97 &bitmap_backing_,
98 content_rect(),
99 source_rect,
100 dest_offset);
101 if (partial_update)
102 queue->AppendPartialUpload(upload);
103 else
104 queue->AppendFullUpload(upload);
105 }
106
ReduceMemoryUsage()107 void BitmapContentLayerUpdater::ReduceMemoryUsage() {
108 canvas_.clear();
109 canvas_size_ = gfx::Size();
110 }
111
SetOpaque(bool opaque)112 void BitmapContentLayerUpdater::SetOpaque(bool opaque) {
113 if (opaque != layer_is_opaque_) {
114 canvas_.clear();
115 canvas_size_ = gfx::Size();
116 }
117
118 ContentLayerUpdater::SetOpaque(opaque);
119 }
120
121 } // namespace cc
122