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/*
* Copyright (c) 2013, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "platform/graphics/ImageBufferSurface.h"
#include "platform/graphics/BitmapImage.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/ImageBuffer.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkDevice.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkPicture.h"
namespace blink {
ImageBufferSurface::ImageBufferSurface(const IntSize& size, OpacityMode opacityMode)
: m_opacityMode(opacityMode)
, m_size(size)
{
setIsHidden(false);
}
ImageBufferSurface::~ImageBufferSurface() { }
PassRefPtr<SkPicture> ImageBufferSurface::getPicture()
{
return nullptr;
}
void ImageBufferSurface::clear()
{
// Clear the background transparent or opaque, as required. It would be nice if this wasn't
// required, but the canvas is currently filled with the magic transparency
// color. Can we have another way to manage this?
if (isValid()) {
if (m_opacityMode == Opaque)
canvas()->drawARGB(255, 0, 0, 0, SkXfermode::kSrc_Mode);
else
canvas()->drawARGB(0, 0, 0, 0, SkXfermode::kClear_Mode);
didClearCanvas();
}
}
const SkBitmap& ImageBufferSurface::bitmap()
{
ASSERT(canvas());
willAccessPixels();
return canvas()->getTopDevice()->accessBitmap(false);
}
const SkBitmap& ImageBufferSurface::cachedBitmap() const
{
DEFINE_STATIC_LOCAL(SkBitmap, nullBitmap, ());
return nullBitmap;
}
PassRefPtr<SkImage> ImageBufferSurface::newImageSnapshot() const
{
return nullptr;
}
static SkBitmap deepSkBitmapCopy(const SkBitmap& bitmap)
{
SkBitmap tmp;
if (!bitmap.deepCopyTo(&tmp))
bitmap.copyTo(&tmp, bitmap.colorType());
return tmp;
}
void ImageBufferSurface::draw(GraphicsContext* context, const FloatRect& destRect, const FloatRect& srcRect, CompositeOperator op, WebBlendMode blendMode, bool needsCopy)
{
SkBitmap bmp = bitmap();
// For ImageBufferSurface that enables cachedBitmap, Use the cached bitmap for CPU side usage
// if it is available, otherwise generate and use it.
if (!context->isAccelerated() && isAccelerated() && cachedBitmapEnabled() && isValid()) {
updateCachedBitmapIfNeeded();
bmp = cachedBitmap();
}
RefPtr<Image> image = BitmapImage::create(NativeImageSkia::create(needsCopy ? deepSkBitmapCopy(bmp) : bmp));
context->drawImage(image.get(), destRect, srcRect, op, blendMode, DoNotRespectImageOrientation);
}
} // namespace blink
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