cc/bitmap_canvas_layer_texture_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
   6 #include "config.h"
   7
   8 #include "BitmapCanvasLayerTextureUpdater.h"
   9
  10 #include "CCTextureUpdateQueue.h"
  11 #include "LayerPainterChromium.h"
  12 #include "PlatformColor.h"
  13 #include "skia/ext/platform_canvas.h"
  14
  15 namespace cc {
  16
  17 BitmapCanvasLayerTextureUpdater::Texture::Texture(BitmapCanvasLayerTextureUpdater* textureUpdater, scoped_ptr<CCPrioritizedTexture> texture)
  18     : LayerTextureUpdater::Texture(texture.Pass())
  19     , m_textureUpdater(textureUpdater)
  20 {
  21 }
  22
  23 BitmapCanvasLayerTextureUpdater::Texture::~Texture()
  24 {
  25 }
  26
  27 void BitmapCanvasLayerTextureUpdater::Texture::update(CCTextureUpdateQueue& queue, const IntRect& sourceRect, const IntSize& destOffset, bool partialUpdate, CCRenderingStats&)
  28 {
  29     textureUpdater()->updateTexture(queue, texture(), sourceRect, destOffset, partialUpdate);
  30 }
  31
  32 PassRefPtr<BitmapCanvasLayerTextureUpdater> BitmapCanvasLayerTextureUpdater::create(scoped_ptr<LayerPainterChromium> painter)
  33 {
  34     return adoptRef(new BitmapCanvasLayerTextureUpdater(painter.Pass()));
  35 }
  36
  37 BitmapCanvasLayerTextureUpdater::BitmapCanvasLayerTextureUpdater(scoped_ptr<LayerPainterChromium> painter)
  38     : CanvasLayerTextureUpdater(painter.Pass())
  39     , m_opaque(false)
  40 {
  41 }
  42
  43 BitmapCanvasLayerTextureUpdater::~BitmapCanvasLayerTextureUpdater()
  44 {
  45 }
  46
  47 PassOwnPtr<LayerTextureUpdater::Texture> BitmapCanvasLayerTextureUpdater::createTexture(CCPrioritizedTextureManager* manager)
  48 {
  49     return adoptPtr(new Texture(this, CCPrioritizedTexture::create(manager)));
  50 }
  51
  52 LayerTextureUpdater::SampledTexelFormat BitmapCanvasLayerTextureUpdater::sampledTexelFormat(GC3Denum textureFormat)
  53 {
  54     // The component order may be bgra if we uploaded bgra pixels to rgba textures.
  55     return PlatformColor::sameComponentOrder(textureFormat) ?
  56             LayerTextureUpdater::SampledTexelFormatRGBA : LayerTextureUpdater::SampledTexelFormatBGRA;
  57 }
  58
  59 void BitmapCanvasLayerTextureUpdater::prepareToUpdate(const IntRect& contentRect, const IntSize& tileSize, float contentsWidthScale, float contentsHeightScale, IntRect& resultingOpaqueRect, CCRenderingStats& stats)
  60 {
  61     if (m_canvasSize != contentRect.size()) {
  62         m_canvasSize = contentRect.size();
  63         m_canvas = adoptPtr(skia::CreateBitmapCanvas(m_canvasSize.width(), m_canvasSize.height(), m_opaque));
  64     }
  65
  66     paintContents(m_canvas.get(), contentRect, contentsWidthScale, contentsHeightScale, resultingOpaqueRect, stats);
  67 }
  68
  69 void BitmapCanvasLayerTextureUpdater::updateTexture(CCTextureUpdateQueue& queue, CCPrioritizedTexture* texture, const IntRect& sourceRect, const IntSize& destOffset, bool partialUpdate)
  70 {
  71     TextureUploader::Parameters upload = { texture, &m_canvas->getDevice()->accessBitmap(false), NULL, { contentRect(), sourceRect, destOffset } };
  72     if (partialUpdate)
  73         queue.appendPartialUpload(upload);
  74     else
  75         queue.appendFullUpload(upload);
  76 }
  77
  78 void BitmapCanvasLayerTextureUpdater::setOpaque(bool opaque)
  79 {
  80     if (opaque != m_opaque) {
  81         m_canvas.clear();
  82         m_canvasSize = IntSize();
  83     }
  84     m_opaque = opaque;
  85 }
  86
  87 } // namespace cc