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/*
* Copyright (C) 2017 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 "PlaceholderRenderingContext.h"
#if ENABLE(OFFSCREEN_CANVAS)
#include "GraphicsLayerContentsDisplayDelegate.h"
#include "HTMLCanvasElement.h"
#include "OffscreenCanvas.h"
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_ALLOCATED_IMPL(PlaceholderRenderingContextSource);
Ref<PlaceholderRenderingContextSource> PlaceholderRenderingContextSource::create(PlaceholderRenderingContext& context)
{
return adoptRef(*new PlaceholderRenderingContextSource(context));
}
PlaceholderRenderingContextSource::PlaceholderRenderingContextSource(PlaceholderRenderingContext& placeholder)
: m_placeholder(placeholder)
{
}
void PlaceholderRenderingContextSource::setPlaceholderBuffer(ImageBuffer& imageBuffer)
{
{
Locker locker { m_lock };
if (m_delegate)
m_delegate->tryCopyToLayer(imageBuffer);
}
RefPtr clone = imageBuffer.clone();
if (!clone)
return;
std::unique_ptr serializedClone = ImageBuffer::sinkIntoSerializedImageBuffer(WTFMove(clone));
if (!serializedClone)
return;
callOnMainThread([weakPlaceholder = m_placeholder, buffer = WTFMove(serializedClone)] () mutable {
RefPtr placeholder = weakPlaceholder.get();
if (!placeholder)
return;
RefPtr imageBuffer = SerializedImageBuffer::sinkIntoImageBuffer(WTFMove(buffer), placeholder->canvas().scriptExecutionContext()->graphicsClient());
if (!imageBuffer)
return;
placeholder->setPlaceholderBuffer(imageBuffer.releaseNonNull());
});
}
void PlaceholderRenderingContextSource::setContentsToLayer(GraphicsLayer& layer)
{
Locker locker { m_lock };
m_delegate = layer.createAsyncContentsDisplayDelegate(m_delegate.get());
}
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(PlaceholderRenderingContext);
std::unique_ptr<PlaceholderRenderingContext> PlaceholderRenderingContext::create(HTMLCanvasElement& element)
{
return std::unique_ptr<PlaceholderRenderingContext> { new PlaceholderRenderingContext(element) };
}
PlaceholderRenderingContext::PlaceholderRenderingContext(HTMLCanvasElement& canvas)
: CanvasRenderingContext(canvas, Type::Placeholder)
, m_source(PlaceholderRenderingContextSource::create(*this))
{
}
HTMLCanvasElement& PlaceholderRenderingContext::canvas() const
{
return static_cast<HTMLCanvasElement&>(canvasBase());
}
IntSize PlaceholderRenderingContext::size() const
{
return canvas().size();
}
void PlaceholderRenderingContext::setContentsToLayer(GraphicsLayer& layer)
{
m_source->setContentsToLayer(layer);
}
void PlaceholderRenderingContext::setPlaceholderBuffer(Ref<ImageBuffer>&& buffer)
{
canvasBase().setImageBufferAndMarkDirty(WTFMove(buffer));
}
}
#endif
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