blob: 1c60dd1e7a63d99186bfd7e0037d6abb130a639b [file] [log] [blame]
/*
* 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"
#if ENABLE(CSS_PAINTING_API)
#include "CanvasRenderingContext.h"
#include "ImageBitmap.h"
#include "PaintRenderingContext2D.h"
namespace WebCore {
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))
, ContextDestructionObserver(&context)
{
}
CustomPaintCanvas::~CustomPaintCanvas()
{
notifyObserversCanvasDestroyed();
m_context = nullptr; // Ensure this goes away before the ImageBuffer.
setImageBuffer(nullptr);
}
ExceptionOr<RefPtr<PaintRenderingContext2D>> CustomPaintCanvas::getContext()
{
if (m_context)
return { RefPtr<PaintRenderingContext2D> { &downcast<PaintRenderingContext2D>(*m_context) } };
m_context = PaintRenderingContext2D::create(*this);
downcast<PaintRenderingContext2D>(*m_context).setUsesDisplayListDrawing(true);
return { RefPtr<PaintRenderingContext2D> { &downcast<PaintRenderingContext2D>(*m_context) } };
}
void CustomPaintCanvas::replayDisplayList(GraphicsContext* ctx) const
{
ASSERT(!m_destinationGraphicsContext);
if (!width() || !height())
return;
// FIXME: Using an intermediate buffer is not needed if there are no composite operations.
auto clipBounds = ctx->clipBounds();
auto image = ImageBuffer::createCompatibleBuffer(clipBounds.size(), *ctx);
if (!image)
return;
m_destinationGraphicsContext = &image->context();
m_destinationGraphicsContext->translate(-clipBounds.location());
if (m_context)
m_context->paintRenderingResultsToCanvas();
m_destinationGraphicsContext = nullptr;
ctx->drawImageBuffer(*image, clipBounds);
}
Image* CustomPaintCanvas::copiedImage() const
{
ASSERT(!m_destinationGraphicsContext);
if (!width() || !height())
return nullptr;
m_copiedBuffer = ImageBuffer::create(size(), RenderingMode::Unaccelerated, 1, ColorSpace::SRGB, nullptr);
if (!m_copiedBuffer)
return nullptr;
m_destinationGraphicsContext = &m_copiedBuffer->context();
if (m_context)
m_context->paintRenderingResultsToCanvas();
m_destinationGraphicsContext = nullptr;
m_copiedImage = m_copiedBuffer->copyImage(DontCopyBackingStore, PreserveResolution::Yes);
return m_copiedImage.get();
}
GraphicsContext* CustomPaintCanvas::drawingContext() const
{
return m_destinationGraphicsContext;
}
GraphicsContext* CustomPaintCanvas::existingDrawingContext() const
{
return drawingContext();
}
}
#endif