Source/platform/graphics/ImageBufferSurface.cpp

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#include "config.h"

#include "platform/graphics/ImageBufferSurface.h"

#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/ImageBuffer.h"
#include "platform/graphics/StaticBitmapImage.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()->clear(SK_ColorBLACK);
        } else {
            canvas()->clear(SK_ColorTRANSPARENT);
        }
        didDraw(FloatRect(FloatPoint(0, 0), size()));
    }
}

void ImageBufferSurface::draw(GraphicsContext* context, const FloatRect& destRect, const FloatRect& srcRect, SkXfermode::Mode op)
{
    RefPtr<SkImage> snapshot = newImageSnapshot();
    if (!snapshot)
        return;

    RefPtr<Image> image = StaticBitmapImage::create(snapshot.release());
    context->drawImage(image.get(), destRect, srcRect, op);
}

const SkBitmap& ImageBufferSurface::deprecatedBitmapForOverwrite()
{
    ASSERT_NOT_REACHED(); // should only be called on non-accelerated surface types, which have overrides
    return canvas()->getDevice()->accessBitmap(false); // Because we have to return something for the code to compile, and it can't be a local (by address).
}


void ImageBufferSurface::flush()
{
    canvas()->flush();
}

bool ImageBufferSurface::writePixels(const SkImageInfo& origInfo, const void* pixels, size_t rowBytes, int x, int y)
{
    return canvas()->writePixels(origInfo, pixels, rowBytes, x, y);
}

} // namespace blink