sky/engine/platform/graphics/ImageBufferSurface.cpp

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#include "sky/engine/platform/graphics/ImageBufferSurface.h"

#include "sky/engine/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/SkPicture.h"

namespace blink {

ImageBufferSurface::ImageBufferSurface(const IntSize& size, OpacityMode opacityMode)
    : m_opacityMode(opacityMode)
    , m_size(size)
{
    setIsHidden(false);
}

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;
}

} // namespace blink