cc/BitmapCanvasLayerTextureUpdater.cpp

   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 #if USE(ACCELERATED_COMPOSITING)
   9
  10 #include "BitmapCanvasLayerTextureUpdater.h"
  11
  12 #include "LayerPainterChromium.h"
  13 #include "PlatformColor.h"
  14 #include "skia/ext/platform_canvas.h"
  15
  16 namespace cc {
  17
  18 BitmapCanvasLayerTextureUpdater::Texture::Texture(BitmapCanvasLayerTextureUpdater* textureUpdater, scoped_ptr<CCPrioritizedTexture> texture)
  19     : LayerTextureUpdater::Texture(texture.Pass())
  20     , m_textureUpdater(textureUpdater)
  21 {
  22 }
  23
  24 BitmapCanvasLayerTextureUpdater::Texture::~Texture()
  25 {
  26 }
  27
  28 void BitmapCanvasLayerTextureUpdater::Texture::updateRect(CCResourceProvider* resourceProvider, const IntRect& sourceRect, const IntSize& destOffset)
  29 {
  30     textureUpdater()->updateTextureRect(resourceProvider, texture(), sourceRect, destOffset);
  31 }
  32
  33 PassRefPtr<BitmapCanvasLayerTextureUpdater> BitmapCanvasLayerTextureUpdater::create(PassOwnPtr<LayerPainterChromium> painter)
  34 {
  35     return adoptRef(new BitmapCanvasLayerTextureUpdater(painter));
  36 }
  37
  38 BitmapCanvasLayerTextureUpdater::BitmapCanvasLayerTextureUpdater(PassOwnPtr<LayerPainterChromium> painter)
  39     : CanvasLayerTextureUpdater(painter)
  40     , m_opaque(false)
  41 {
  42 }
  43
  44 BitmapCanvasLayerTextureUpdater::~BitmapCanvasLayerTextureUpdater()
  45 {
  46 }
  47
  48 PassOwnPtr<LayerTextureUpdater::Texture> BitmapCanvasLayerTextureUpdater::createTexture(CCPrioritizedTextureManager* manager)
  49 {
  50     return adoptPtr(new Texture(this, CCPrioritizedTexture::create(manager)));
  51 }
  52
  53 LayerTextureUpdater::SampledTexelFormat BitmapCanvasLayerTextureUpdater::sampledTexelFormat(GC3Denum textureFormat)
  54 {
  55     // The component order may be bgra if we uploaded bgra pixels to rgba textures.
  56     return PlatformColor::sameComponentOrder(textureFormat) ?
  57             LayerTextureUpdater::SampledTexelFormatRGBA : LayerTextureUpdater::SampledTexelFormatBGRA;
  58 }
  59
  60 void BitmapCanvasLayerTextureUpdater::prepareToUpdate(const IntRect& contentRect, const IntSize& tileSize, float contentsWidthScale, float contentsHeightScale, IntRect& resultingOpaqueRect, CCRenderingStats& stats)
  61 {
  62     if (m_canvasSize != contentRect.size()) {
  63         m_canvasSize = contentRect.size();
  64         m_canvas = adoptPtr(skia::CreateBitmapCanvas(m_canvasSize.width(), m_canvasSize.height(), m_opaque));
  65     }
  66
  67     paintContents(m_canvas.get(), contentRect, contentsWidthScale, contentsHeightScale, resultingOpaqueRect, stats);
  68 }
  69
  70 void BitmapCanvasLayerTextureUpdater::updateTextureRect(CCResourceProvider* resourceProvider, CCPrioritizedTexture* texture, const IntRect& sourceRect, const IntSize& destOffset)
  71 {
  72     const SkBitmap& bitmap = m_canvas->getDevice()->accessBitmap(false);
  73     bitmap.lockPixels();
  74
  75     texture->upload(resourceProvider, static_cast<const uint8_t*>(bitmap.getPixels()), contentRect(), sourceRect, destOffset);
  76     bitmap.unlockPixels();
  77 }
  78
  79 void BitmapCanvasLayerTextureUpdater::setOpaque(bool opaque)
  80 {
  81     if (opaque != m_opaque) {
  82         m_canvas.clear();
  83         m_canvasSize = IntSize();
  84     }
  85     m_opaque = opaque;
  86 }
  87
  88 } // namespace cc
  89 #endif // USE(ACCELERATED_COMPOSITING)