src/cc/resources/bitmap_content_layer_updater.cc

   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
  17 BitmapContentLayerUpdater::Resource::Resource(
  18     BitmapContentLayerUpdater* updater,
  19     scoped_ptr<PrioritizedResource> texture)
  20     : LayerUpdater::Resource(texture.Pass()), updater_(updater) {}
  21
  22 BitmapContentLayerUpdater::Resource::~Resource() {}
  23
  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
  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
  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
  48 BitmapContentLayerUpdater::~BitmapContentLayerUpdater() {}
  49
  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
  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   devtools_instrumentation::ScopedLayerTask paint_layer(
  63       devtools_instrumentation::kPaintLayer, layer_id_);
  64   if (canvas_size_.width() < content_rect.size().width() ||
  65       canvas_size_.height() < content_rect.size().height()) {
  66     devtools_instrumentation::ScopedLayerTask paint_setup(
  67         devtools_instrumentation::kPaintSetup, layer_id_);
  68     canvas_size_ = content_rect.size();
  69     canvas_ = skia::AdoptRef(skia::CreateBitmapCanvas(
  70         canvas_size_.width(), canvas_size_.height(), layer_is_opaque_));
  71   }
  72
  73   base::TimeTicks start_time =
  74       rendering_stats_instrumentation_->StartRecording();
  75   PaintContents(canvas_.get(),
  76                 content_rect,
  77                 contents_width_scale,
  78                 contents_height_scale,
  79                 resulting_opaque_rect);
  80   base::TimeDelta duration =
  81       rendering_stats_instrumentation_->EndRecording(start_time);
  82   rendering_stats_instrumentation_->AddPaint(
  83       duration,
  84       content_rect.width() * content_rect.height());
  85 }
  86
  87 void BitmapContentLayerUpdater::UpdateTexture(ResourceUpdateQueue* queue,
  88                                               PrioritizedResource* texture,
  89                                               gfx::Rect source_rect,
  90                                               gfx::Vector2d dest_offset,
  91                                               bool partial_update) {
  92   CHECK(canvas_);
  93   gfx::Rect canvas_rect = content_rect();
  94   canvas_rect.set_size(canvas_size_);
  95   ResourceUpdate upload = ResourceUpdate::CreateFromCanvas(
  96       texture, canvas_, canvas_rect, source_rect, dest_offset);
  97   if (partial_update)
  98     queue->AppendPartialUpload(upload);
  99   else
 100     queue->AppendFullUpload(upload);
 101 }
 102
 103 void BitmapContentLayerUpdater::ReduceMemoryUsage() {
 104   canvas_.clear();
 105   canvas_size_ = gfx::Size();
 106 }
 107
 108 void BitmapContentLayerUpdater::SetOpaque(bool opaque) {
 109   if (opaque != layer_is_opaque_) {
 110     canvas_.clear();
 111     canvas_size_ = gfx::Size();
 112   }
 113
 114   ContentLayerUpdater::SetOpaque(opaque);
 115 }
 116
 117 }  // namespace cc