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