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/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(), kN32_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(), layer_id) {
  57 }
  58
  59 BitmapSkPictureContentLayerUpdater::~BitmapSkPictureContentLayerUpdater() {}
  60
  61 scoped_ptr<LayerUpdater::Resource>
  62 BitmapSkPictureContentLayerUpdater::CreateResource(
  63     PrioritizedResourceManager* manager) {
  64   return make_scoped_ptr(
  65       new Resource(this, PrioritizedResource::Create(manager)));
  66 }
  67
  68 void BitmapSkPictureContentLayerUpdater::PaintContentsRect(
  69     SkCanvas* canvas,
  70     const gfx::Rect& source_rect) {
  71   if (!canvas)
  72     return;
  73   // Translate the origin of content_rect to that of source_rect.
  74   canvas->translate(paint_rect().x() - source_rect.x(),
  75                     paint_rect().y() - source_rect.y());
  76   DrawPicture(canvas);
  77 }
  78
  79 }  // namespace cc