code.vuplus.com Git - vuplus_webkit/blob - Source/WebCore/platform/graphics/chromium/ContentLayerChromium.cpp

   1 /*
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   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
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   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "config.h"
  32
  33 #if USE(ACCELERATED_COMPOSITING)
  34
  35 #include "ContentLayerChromium.h"
  36
  37 #include "LayerPainterChromium.h"
  38 #include "LayerRendererChromium.h"
  39 #include "LayerTextureUpdaterCanvas.h"
  40 #include "PlatformSupport.h"
  41 #include "cc/CCLayerTreeHost.h"
  42 #include <wtf/CurrentTime.h>
  43
  44 namespace WebCore {
  45
  46 class ContentLayerPainter : public LayerPainterChromium {
  47     WTF_MAKE_NONCOPYABLE(ContentLayerPainter);
  48 public:
  49     static PassOwnPtr<ContentLayerPainter> create(CCLayerDelegate* delegate)
  50     {
  51         return adoptPtr(new ContentLayerPainter(delegate));
  52     }
  53
  54     virtual void paint(GraphicsContext& context, const IntRect& contentRect)
  55     {
  56         double paintStart = currentTime();
  57         context.clearRect(contentRect);
  58         context.clip(contentRect);
  59         m_delegate->paintContents(context, contentRect);
  60         double paintEnd = currentTime();
  61         double pixelsPerSec = (contentRect.width() * contentRect.height()) / (paintEnd - paintStart);
  62         PlatformSupport::histogramCustomCounts("Renderer4.AccelContentPaintDurationMS", (paintEnd - paintStart) * 1000, 0, 120, 30);
  63         PlatformSupport::histogramCustomCounts("Renderer4.AccelContentPaintMegapixPerSecond", pixelsPerSec / 1000000, 10, 210, 30);
  64     }
  65 private:
  66     explicit ContentLayerPainter(CCLayerDelegate* delegate)
  67         : m_delegate(delegate)
  68     {
  69     }
  70
  71     CCLayerDelegate* m_delegate;
  72 };
  73
  74 PassRefPtr<ContentLayerChromium> ContentLayerChromium::create(CCLayerDelegate* delegate)
  75 {
  76     return adoptRef(new ContentLayerChromium(delegate));
  77 }
  78
  79 ContentLayerChromium::ContentLayerChromium(CCLayerDelegate* delegate)
  80     : TiledLayerChromium(delegate)
  81 {
  82 }
  83
  84 ContentLayerChromium::~ContentLayerChromium()
  85 {
  86     cleanupResources();
  87 }
  88
  89 void ContentLayerChromium::cleanupResources()
  90 {
  91     m_textureUpdater.clear();
  92     TiledLayerChromium::cleanupResources();
  93 }
  94
  95 void ContentLayerChromium::paintContentsIfDirty()
  96 {
  97     ASSERT(drawsContent());
  98
  99     updateTileSizeAndTilingOption();
 100
 101     const IntRect& layerRect = visibleLayerRect();
 102     if (layerRect.isEmpty())
 103         return;
 104
 105     IntRect dirty = enclosingIntRect(m_dirtyRect);
 106     dirty.intersect(IntRect(IntPoint(), contentBounds()));
 107     invalidateRect(dirty);
 108
 109     if (!drawsContent())
 110         return;
 111
 112     prepareToUpdate(layerRect);
 113     m_dirtyRect = FloatRect();
 114 }
 115
 116 bool ContentLayerChromium::drawsContent() const
 117 {
 118     return m_delegate && m_delegate->drawsContent() && TiledLayerChromium::drawsContent();
 119 }
 120
 121 void ContentLayerChromium::createTextureUpdater(const CCLayerTreeHost* host)
 122 {
 123 #if USE(SKIA)
 124     // Note that host->skiaContext() will crash if called while in threaded
 125     // mode. This thus depends on CCLayerTreeHost::initialize turning off
 126     // acceleratePainting to prevent this from crashing.
 127     if (host->settings().acceleratePainting) {
 128         m_textureUpdater = LayerTextureUpdaterSkPicture::create(ContentLayerPainter::create(m_delegate));
 129         return;
 130     }
 131 #endif // SKIA
 132
 133     m_textureUpdater = LayerTextureUpdaterBitmap::create(ContentLayerPainter::create(m_delegate), host->layerRendererCapabilities().usingMapSub);
 134 }
 135
 136 }
 137 #endif // USE(ACCELERATED_COMPOSITING)