src/cc/resources/bitmap_skpicture_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_skpicture_content_layer_updater.h"
   6
   7 #include "base/time/time.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_queue.h"
  12 #include "third_party/skia/include/core/SkBitmapDevice.h"
  13 #include "third_party/skia/include/core/SkCanvas.h"
  14
  15 namespace cc {
  16
  17 BitmapSkPictureContentLayerUpdater::Resource::Resource(
  18     BitmapSkPictureContentLayerUpdater* updater,
  19     scoped_ptr<PrioritizedResource> texture)
  20     : ContentLayerUpdater::Resource(texture.Pass()), updater_(updater) {}
  21
  22 void BitmapSkPictureContentLayerUpdater::Resource::Update(
  23     ResourceUpdateQueue* queue,
  24     const gfx::Rect& source_rect,
  25     const gfx::Vector2d& dest_offset,
  26     bool partial_update) {
  27   bitmap_.setConfig(
  28       SkBitmap::kARGB_8888_Config, source_rect.width(), source_rect.height(), 0,
  29       updater_->layer_is_opaque() ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
  30   bitmap_.allocPixels();
  31   SkBitmapDevice device(bitmap_);
  32   SkCanvas canvas(&device);
  33   updater_->PaintContentsRect(&canvas, source_rect);
  34
  35   ResourceUpdate upload = ResourceUpdate::Create(
  36       texture(), &bitmap_, source_rect, source_rect, dest_offset);
  37   if (partial_update)
  38     queue->AppendPartialUpload(upload);
  39   else
  40     queue->AppendFullUpload(upload);
  41 }
  42
  43 scoped_refptr<BitmapSkPictureContentLayerUpdater>
  44 BitmapSkPictureContentLayerUpdater::Create(
  45     scoped_ptr<LayerPainter> painter,
  46     RenderingStatsInstrumentation* stats_instrumentation,
  47     int layer_id) {
  48   return make_scoped_refptr(
  49       new BitmapSkPictureContentLayerUpdater(painter.Pass(),
  50                                              stats_instrumentation,
  51                                              layer_id));
  52 }
  53
  54 BitmapSkPictureContentLayerUpdater::BitmapSkPictureContentLayerUpdater(
  55     scoped_ptr<LayerPainter> painter,
  56     RenderingStatsInstrumentation* stats_instrumentation,
  57     int layer_id)
  58     : SkPictureContentLayerUpdater(painter.Pass(),
  59                                    stats_instrumentation,
  60                                    layer_id) {}
  61
  62 BitmapSkPictureContentLayerUpdater::~BitmapSkPictureContentLayerUpdater() {}
  63
  64 scoped_ptr<LayerUpdater::Resource>
  65 BitmapSkPictureContentLayerUpdater::CreateResource(
  66     PrioritizedResourceManager* manager) {
  67   return scoped_ptr<LayerUpdater::Resource>(
  68       new Resource(this, PrioritizedResource::Create(manager)));
  69 }
  70
  71 void BitmapSkPictureContentLayerUpdater::PaintContentsRect(
  72     SkCanvas* canvas,
  73     const gfx::Rect& source_rect) {
  74   // Translate the origin of content_rect to that of source_rect.
  75   canvas->translate(content_rect().x() - source_rect.x(),
  76                     content_rect().y() - source_rect.y());
  77   base::TimeTicks start_time =
  78       rendering_stats_instrumentation_->StartRecording();
  79   DrawPicture(canvas);
  80   base::TimeDelta duration =
  81       rendering_stats_instrumentation_->EndRecording(start_time);
  82   rendering_stats_instrumentation_->AddRaster(
  83       duration,
  84       source_rect.width() * source_rect.height());
  85 }
  86
  87 }  // namespace cc