125 lines
4.1 KiB
C++
125 lines
4.1 KiB
C++
/*
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* Copyright (C) 2018 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "CustomPaintCanvas.h"
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#if ENABLE(CSS_PAINTING_API)
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#include "CanvasRenderingContext.h"
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#include "ImageBitmap.h"
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#include "PaintRenderingContext2D.h"
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namespace WebCore {
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Ref<CustomPaintCanvas> CustomPaintCanvas::create(ScriptExecutionContext& context, unsigned width, unsigned height)
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{
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return adoptRef(*new CustomPaintCanvas(context, width, height));
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}
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CustomPaintCanvas::CustomPaintCanvas(ScriptExecutionContext& context, unsigned width, unsigned height)
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: CanvasBase(IntSize(width, height))
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, ContextDestructionObserver(&context)
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{
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}
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CustomPaintCanvas::~CustomPaintCanvas()
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{
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notifyObserversCanvasDestroyed();
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m_context = nullptr; // Ensure this goes away before the ImageBuffer.
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setImageBuffer(nullptr);
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}
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ExceptionOr<RefPtr<PaintRenderingContext2D>> CustomPaintCanvas::getContext()
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{
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if (m_context)
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return { RefPtr<PaintRenderingContext2D> { &downcast<PaintRenderingContext2D>(*m_context) } };
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m_context = PaintRenderingContext2D::create(*this);
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downcast<PaintRenderingContext2D>(*m_context).setUsesDisplayListDrawing(true);
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return { RefPtr<PaintRenderingContext2D> { &downcast<PaintRenderingContext2D>(*m_context) } };
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}
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void CustomPaintCanvas::replayDisplayList(GraphicsContext* ctx) const
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{
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ASSERT(!m_destinationGraphicsContext);
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if (!width() || !height())
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return;
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// FIXME: Using an intermediate buffer is not needed if there are no composite operations.
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auto clipBounds = ctx->clipBounds();
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auto image = ImageBuffer::createCompatibleBuffer(clipBounds.size(), *ctx);
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if (!image)
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return;
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m_destinationGraphicsContext = &image->context();
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m_destinationGraphicsContext->translate(-clipBounds.location());
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if (m_context)
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m_context->paintRenderingResultsToCanvas();
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m_destinationGraphicsContext = nullptr;
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ctx->drawImageBuffer(*image, clipBounds);
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}
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Image* CustomPaintCanvas::copiedImage() const
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{
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ASSERT(!m_destinationGraphicsContext);
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if (!width() || !height())
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return nullptr;
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m_copiedBuffer = ImageBuffer::create(size(), RenderingMode::Unaccelerated, 1, DestinationColorSpace::SRGB(), PixelFormat::BGRA8, nullptr);
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if (!m_copiedBuffer)
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return nullptr;
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m_destinationGraphicsContext = &m_copiedBuffer->context();
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if (m_context)
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m_context->paintRenderingResultsToCanvas();
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m_destinationGraphicsContext = nullptr;
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m_copiedImage = m_copiedBuffer->copyImage(DontCopyBackingStore, PreserveResolution::Yes);
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return m_copiedImage.get();
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}
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void CustomPaintCanvas::clearCopiedImage() const
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{
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m_copiedImage = nullptr;
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}
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GraphicsContext* CustomPaintCanvas::drawingContext() const
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{
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return m_destinationGraphicsContext;
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}
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GraphicsContext* CustomPaintCanvas::existingDrawingContext() const
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{
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return drawingContext();
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}
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}
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#endif
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