cc/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/bitmap_content_layer_updater.h"
   6
   7 #include "cc/layer_painter.h"
   8 #include "cc/prioritized_resource.h"
   9 #include "cc/rendering_stats.h"
  10 #include "cc/resource_update.h"
  11 #include "cc/resource_update_queue.h"
  12 #include "skia/ext/platform_canvas.h"
  13
  14 namespace cc {
  15
  16 BitmapContentLayerUpdater::Resource::Resource(BitmapContentLayerUpdater* updater, scoped_ptr<PrioritizedResource> texture)
  17     : LayerUpdater::Resource(texture.Pass())
  18     , m_updater(updater)
  19 {
  20 }
  21
  22 BitmapContentLayerUpdater::Resource::~Resource()
  23 {
  24 }
  25
  26 void BitmapContentLayerUpdater::Resource::update(ResourceUpdateQueue& queue, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate, RenderingStats&)
  27 {
  28     updater()->updateTexture(queue, texture(), sourceRect, destOffset, partialUpdate);
  29 }
  30
  31 scoped_refptr<BitmapContentLayerUpdater> BitmapContentLayerUpdater::create(scoped_ptr<LayerPainter> painter)
  32 {
  33     return make_scoped_refptr(new BitmapContentLayerUpdater(painter.Pass()));
  34 }
  35
  36 BitmapContentLayerUpdater::BitmapContentLayerUpdater(scoped_ptr<LayerPainter> painter)
  37     : ContentLayerUpdater(painter.Pass())
  38     , m_opaque(false)
  39 {
  40 }
  41
  42 BitmapContentLayerUpdater::~BitmapContentLayerUpdater()
  43 {
  44 }
  45
  46 scoped_ptr<LayerUpdater::Resource> BitmapContentLayerUpdater::createResource(PrioritizedResourceManager* manager)
  47 {
  48     return scoped_ptr<LayerUpdater::Resource>(new Resource(this, PrioritizedResource::create(manager)));
  49 }
  50
  51 void BitmapContentLayerUpdater::prepareToUpdate(const gfx::Rect& contentRect, const gfx::Size& tileSize, float contentsWidthScale, float contentsHeightScale, gfx::Rect& resultingOpaqueRect, RenderingStats& stats)
  52 {
  53     if (m_canvasSize != contentRect.size()) {
  54         m_canvasSize = contentRect.size();
  55         m_canvas = make_scoped_ptr(skia::CreateBitmapCanvas(m_canvasSize.width(), m_canvasSize.height(), m_opaque));
  56     }
  57
  58     stats.totalPixelsRasterized += contentRect.width() * contentRect.height();
  59
  60     paintContents(m_canvas.get(), contentRect, contentsWidthScale, contentsHeightScale, resultingOpaqueRect, stats);
  61 }
  62
  63 void BitmapContentLayerUpdater::updateTexture(ResourceUpdateQueue& queue, PrioritizedResource* texture, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate)
  64 {
  65     ResourceUpdate upload = ResourceUpdate::Create(
  66         texture,
  67         &m_canvas->getDevice()->accessBitmap(false),
  68         contentRect(),
  69         sourceRect,
  70         destOffset);
  71     if (partialUpdate)
  72         queue.appendPartialUpload(upload);
  73     else
  74         queue.appendFullUpload(upload);
  75 }
  76
  77 void BitmapContentLayerUpdater::setOpaque(bool opaque)
  78 {
  79     if (opaque != m_opaque) {
  80         m_canvas.reset();
  81         m_canvasSize = gfx::Size();
  82     }
  83     m_opaque = opaque;
  84 }
  85
  86 }  // namespace cc