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,gfx::Rect source_rect,gfx::Vector2d dest_offset,bool partial_update)24 void BitmapContentLayerUpdater::Resource::Update(ResourceUpdateQueue* queue,
25 gfx::Rect source_rect,
26 gfx::Vector2d dest_offset,
27 bool partial_update) {
28 updater_->UpdateTexture(
29 queue, texture(), source_rect, dest_offset, partial_update);
30 }
31
Create(scoped_ptr<LayerPainter> painter,RenderingStatsInstrumentation * stats_instrumentation,int layer_id)32 scoped_refptr<BitmapContentLayerUpdater> BitmapContentLayerUpdater::Create(
33 scoped_ptr<LayerPainter> painter,
34 RenderingStatsInstrumentation* stats_instrumentation,
35 int layer_id) {
36 return make_scoped_refptr(
37 new BitmapContentLayerUpdater(painter.Pass(),
38 stats_instrumentation,
39 layer_id));
40 }
41
BitmapContentLayerUpdater(scoped_ptr<LayerPainter> painter,RenderingStatsInstrumentation * stats_instrumentation,int layer_id)42 BitmapContentLayerUpdater::BitmapContentLayerUpdater(
43 scoped_ptr<LayerPainter> painter,
44 RenderingStatsInstrumentation* stats_instrumentation,
45 int layer_id)
46 : ContentLayerUpdater(painter.Pass(), stats_instrumentation, layer_id) {}
47
~BitmapContentLayerUpdater()48 BitmapContentLayerUpdater::~BitmapContentLayerUpdater() {}
49
CreateResource(PrioritizedResourceManager * manager)50 scoped_ptr<LayerUpdater::Resource> BitmapContentLayerUpdater::CreateResource(
51 PrioritizedResourceManager* manager) {
52 return scoped_ptr<LayerUpdater::Resource>(
53 new Resource(this, PrioritizedResource::Create(manager)));
54 }
55
PrepareToUpdate(gfx::Rect content_rect,gfx::Size tile_size,float contents_width_scale,float contents_height_scale,gfx::Rect * resulting_opaque_rect)56 void BitmapContentLayerUpdater::PrepareToUpdate(
57 gfx::Rect content_rect,
58 gfx::Size tile_size,
59 float contents_width_scale,
60 float contents_height_scale,
61 gfx::Rect* resulting_opaque_rect) {
62 if (canvas_size_ != content_rect.size()) {
63 devtools_instrumentation::ScopedLayerTask paint_setup(
64 devtools_instrumentation::kPaintSetup, layer_id_);
65 canvas_size_ = content_rect.size();
66 bitmap_backing_.setConfig(
67 SkBitmap::kARGB_8888_Config,
68 canvas_size_.width(), canvas_size_.height(),
69 0, layer_is_opaque_ ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
70 bitmap_backing_.allocPixels();
71 canvas_ = skia::AdoptRef(new SkCanvas(bitmap_backing_));
72 }
73
74 base::TimeTicks start_time =
75 rendering_stats_instrumentation_->StartRecording();
76 PaintContents(canvas_.get(),
77 content_rect.origin(),
78 contents_width_scale,
79 contents_height_scale,
80 resulting_opaque_rect);
81 base::TimeDelta duration =
82 rendering_stats_instrumentation_->EndRecording(start_time);
83 rendering_stats_instrumentation_->AddPaint(
84 duration,
85 content_rect.width() * content_rect.height());
86 }
87
UpdateTexture(ResourceUpdateQueue * queue,PrioritizedResource * texture,gfx::Rect source_rect,gfx::Vector2d dest_offset,bool partial_update)88 void BitmapContentLayerUpdater::UpdateTexture(ResourceUpdateQueue* queue,
89 PrioritizedResource* texture,
90 gfx::Rect source_rect,
91 gfx::Vector2d dest_offset,
92 bool partial_update) {
93 CHECK(canvas_);
94 ResourceUpdate upload =
95 ResourceUpdate::CreateFromCanvas(texture,
96 canvas_,
97 content_rect(),
98 source_rect,
99 dest_offset);
100 if (partial_update)
101 queue->AppendPartialUpload(upload);
102 else
103 queue->AppendFullUpload(upload);
104 }
105
ReduceMemoryUsage()106 void BitmapContentLayerUpdater::ReduceMemoryUsage() {
107 canvas_.clear();
108 canvas_size_ = gfx::Size();
109 }
110
SetOpaque(bool opaque)111 void BitmapContentLayerUpdater::SetOpaque(bool opaque) {
112 if (opaque != layer_is_opaque_) {
113 canvas_.clear();
114 canvas_size_ = gfx::Size();
115 }
116
117 ContentLayerUpdater::SetOpaque(opaque);
118 }
119
120 } // namespace cc
121