third_party/WebKit/Source/platform/graphics/UnacceleratedImageBufferSurface.cpp

   1 /*
   2  * Copyright (c) 2013, Google Inc. All rights reserved.
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   4  * Redistribution and use in source and binary forms, with or without
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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
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  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.
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  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "config.h"
  32 #include "platform/graphics/UnacceleratedImageBufferSurface.h"
  33
  34 #include "third_party/skia/include/core/SkCanvas.h"
  35 #include "third_party/skia/include/core/SkDevice.h"
  36 #include "third_party/skia/include/core/SkSurface.h"
  37 #include "wtf/PassRefPtr.h"
  38
  39 namespace blink {
  40
  41 UnacceleratedImageBufferSurface::UnacceleratedImageBufferSurface(const IntSize& size, OpacityMode opacityMode)
  42     : ImageBufferSurface(size, opacityMode)
  43 {
  44     SkAlphaType alphaType = (Opaque == opacityMode) ? kOpaque_SkAlphaType : kPremul_SkAlphaType;
  45     SkImageInfo info = SkImageInfo::MakeN32(size.width(), size.height(), alphaType);
  46     SkSurfaceProps disableLCDProps(0, kUnknown_SkPixelGeometry);
  47     m_surface = adoptRef(SkSurface::NewRaster(info, Opaque == opacityMode ? 0 : &disableLCDProps));
  48
  49     if (m_surface)
  50         clear();
  51 }
  52
  53 UnacceleratedImageBufferSurface::~UnacceleratedImageBufferSurface() { }
  54
  55 SkCanvas* UnacceleratedImageBufferSurface::canvas()
  56 {
  57     return m_surface->getCanvas();
  58 }
  59
  60 const SkBitmap& UnacceleratedImageBufferSurface::deprecatedBitmapForOverwrite()
  61 {
  62     m_surface->notifyContentWillChange(SkSurface::kDiscard_ContentChangeMode);
  63     return m_surface->getCanvas()->getDevice()->accessBitmap(false);
  64 }
  65
  66 bool UnacceleratedImageBufferSurface::isValid() const
  67 {
  68     return m_surface;
  69 }
  70
  71 PassRefPtr<SkImage> UnacceleratedImageBufferSurface::newImageSnapshot()
  72 {
  73     return adoptRef(m_surface->newImageSnapshot());
  74 }
  75
  76 } // namespace blink