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/*
* Copyright (C) 2018 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "CustomPaintCanvas.h"
#include "BitmapImage.h"
#include "CSSParserContext.h"
#include "CanvasRenderingContext.h"
#include "ImageBitmap.h"
#include "PaintRenderingContext2D.h"
#include "ScriptExecutionContext.h"
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_ALLOCATED_IMPL(CustomPaintCanvas);
Ref<CustomPaintCanvas> CustomPaintCanvas::create(ScriptExecutionContext& context, unsigned width, unsigned height)
{
return adoptRef(*new CustomPaintCanvas(context, width, height));
}
CustomPaintCanvas::CustomPaintCanvas(ScriptExecutionContext& context, unsigned width, unsigned height)
: CanvasBase(IntSize(width, height), context)
, ContextDestructionObserver(&context)
{
}
CustomPaintCanvas::~CustomPaintCanvas()
{
notifyObserversCanvasDestroyed();
m_context = nullptr; // Ensure this goes away before the ImageBuffer.
setImageBuffer(nullptr);
}
RefPtr<PaintRenderingContext2D> CustomPaintCanvas::getContext()
{
if (!m_context)
m_context = PaintRenderingContext2D::create(*this);
return m_context.get();
}
void CustomPaintCanvas::replayDisplayList(GraphicsContext& target)
{
if (!width() || !height())
return;
// FIXME: Using an intermediate buffer is not needed if there are no composite operations.
auto clipBounds = target.clipBounds();
auto image = target.createAlignedImageBuffer(clipBounds.size());
if (!image)
return;
auto& imageTarget = image->context();
imageTarget.translate(-clipBounds.location());
if (m_context)
m_context->replayDisplayList(imageTarget);
target.drawImageBuffer(*image, clipBounds);
}
Image* CustomPaintCanvas::copiedImage() const
{
if (!width() || !height())
return nullptr;
m_copiedImage = nullptr;
auto buffer = ImageBuffer::create(size(), RenderingMode::Unaccelerated, RenderingPurpose::Unspecified, 1, DestinationColorSpace::SRGB(), ImageBufferPixelFormat::BGRA8);
if (buffer) {
if (m_context)
m_context->replayDisplayList(buffer->context());
m_copiedImage = BitmapImage::create(ImageBuffer::sinkIntoNativeImage(buffer));
}
return m_copiedImage.get();
}
void CustomPaintCanvas::clearCopiedImage() const
{
m_copiedImage = nullptr;
}
const CSSParserContext& CustomPaintCanvas::cssParserContext() const
{
// FIXME: Rather than using a default CSSParserContext, there should be one exposed via ScriptExecutionContext.
if (!m_cssParserContext)
m_cssParserContext = WTF::makeUnique<CSSParserContext>(HTMLStandardMode);
return *m_cssParserContext;
}
} // namespace WebCore
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