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      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/SkCanvas.h"
     13 
     14 namespace cc {
     15 
     16 BitmapSkPictureContentLayerUpdater::Resource::Resource(
     17     BitmapSkPictureContentLayerUpdater* updater,
     18     scoped_ptr<PrioritizedResource> texture)
     19     : ContentLayerUpdater::Resource(texture.Pass()), updater_(updater) {}
     20 
     21 void BitmapSkPictureContentLayerUpdater::Resource::Update(
     22     ResourceUpdateQueue* queue,
     23     const gfx::Rect& source_rect,
     24     const gfx::Vector2d& dest_offset,
     25     bool partial_update) {
     26   SkAlphaType at =
     27       updater_->layer_is_opaque() ? kOpaque_SkAlphaType : kPremul_SkAlphaType;
     28   bitmap_.allocPixels(SkImageInfo::Make(
     29       source_rect.width(), source_rect.height(), kPMColor_SkColorType, at));
     30   SkCanvas canvas(bitmap_);
     31   updater_->PaintContentsRect(&canvas, source_rect);
     32 
     33   ResourceUpdate upload = ResourceUpdate::Create(
     34       texture(), &bitmap_, source_rect, source_rect, dest_offset);
     35   if (partial_update)
     36     queue->AppendPartialUpload(upload);
     37   else
     38     queue->AppendFullUpload(upload);
     39 }
     40 
     41 scoped_refptr<BitmapSkPictureContentLayerUpdater>
     42 BitmapSkPictureContentLayerUpdater::Create(
     43     scoped_ptr<LayerPainter> painter,
     44     RenderingStatsInstrumentation* stats_instrumentation,
     45     int layer_id) {
     46   return make_scoped_refptr(
     47       new BitmapSkPictureContentLayerUpdater(painter.Pass(),
     48                                              stats_instrumentation,
     49                                              layer_id));
     50 }
     51 
     52 BitmapSkPictureContentLayerUpdater::BitmapSkPictureContentLayerUpdater(
     53     scoped_ptr<LayerPainter> painter,
     54     RenderingStatsInstrumentation* stats_instrumentation,
     55     int layer_id)
     56     : SkPictureContentLayerUpdater(painter.Pass(),
     57                                    stats_instrumentation,
     58                                    layer_id) {}
     59 
     60 BitmapSkPictureContentLayerUpdater::~BitmapSkPictureContentLayerUpdater() {}
     61 
     62 scoped_ptr<LayerUpdater::Resource>
     63 BitmapSkPictureContentLayerUpdater::CreateResource(
     64     PrioritizedResourceManager* manager) {
     65   return scoped_ptr<LayerUpdater::Resource>(
     66       new Resource(this, PrioritizedResource::Create(manager)));
     67 }
     68 
     69 void BitmapSkPictureContentLayerUpdater::PaintContentsRect(
     70     SkCanvas* canvas,
     71     const gfx::Rect& source_rect) {
     72   if (!canvas)
     73     return;
     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
     88