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/*
* Copyright (C) 2018-2022 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 "CustomPaintImage.h"
#if ENABLE(CSS_PAINTING_API)
#include "CSSComputedStyleDeclaration.h"
#include "CSSImageValue.h"
#include "CSSPrimitiveValue.h"
#include "CSSPropertyNames.h"
#include "CSSPropertyParser.h"
#include "CSSStyleImageValue.h"
#include "CSSUnitValue.h"
#include "CSSUnparsedValue.h"
#include "CustomPaintCanvas.h"
#include "GraphicsContext.h"
#include "HashMapStylePropertyMapReadOnly.h"
#include "ImageBitmap.h"
#include "ImageBuffer.h"
#include "JSCSSPaintCallback.h"
#include "JSDOMExceptionHandling.h"
#include "MainThreadStylePropertyMapReadOnly.h"
#include "PaintRenderingContext2D.h"
#include "RenderElement.h"
#include <JavaScriptCore/ConstructData.h>
namespace WebCore {
CustomPaintImage::CustomPaintImage(PaintWorkletGlobalScope::PaintDefinition& definition, const FloatSize& size, const RenderElement& element, const Vector<String>& arguments)
: m_paintDefinition(definition)
, m_inputProperties(definition.inputProperties)
, m_element(element)
, m_arguments(arguments)
{
setContainerSize(size);
}
CustomPaintImage::~CustomPaintImage() = default;
static RefPtr<CSSValue> extractComputedProperty(const AtomString& name, Element& element)
{
ComputedStyleExtractor extractor(&element);
if (isCustomPropertyName(name))
return extractor.customPropertyValue(name);
CSSPropertyID propertyID = cssPropertyID(name);
if (!propertyID)
return nullptr;
return extractor.propertyValue(propertyID, ComputedStyleExtractor::UpdateLayout::No);
}
ImageDrawResult CustomPaintImage::doCustomPaint(GraphicsContext& destContext, const FloatSize& destSize)
{
if (!m_element || !m_element->element() || !m_paintDefinition)
return ImageDrawResult::DidNothing;
JSC::JSValue paintConstructor = m_paintDefinition->paintConstructor;
if (!paintConstructor)
return ImageDrawResult::DidNothing;
ASSERT(!m_element->needsLayout());
ASSERT(!m_element->element()->document().needsStyleRecalc());
JSCSSPaintCallback& callback = static_cast<JSCSSPaintCallback&>(m_paintDefinition->paintCallback.get());
auto* scriptExecutionContext = callback.scriptExecutionContext();
if (!scriptExecutionContext)
return ImageDrawResult::DidNothing;
auto canvas = CustomPaintCanvas::create(*scriptExecutionContext, destSize.width(), destSize.height());
RefPtr context = canvas->getContext();
HashMap<AtomString, RefPtr<CSSValue>> propertyValues;
if (auto* element = m_element->element()) {
for (auto& name : m_inputProperties)
propertyValues.add(name, extractComputedProperty(name, *element));
}
auto size = CSSPaintSize::create(destSize.width(), destSize.height());
Ref<StylePropertyMapReadOnly> propertyMap = HashMapStylePropertyMapReadOnly::create(WTFMove(propertyValues));
auto& vm = paintConstructor.getObject()->vm();
JSC::JSLockHolder lock(vm);
auto scope = DECLARE_THROW_SCOPE(vm);
auto& globalObject = *paintConstructor.getObject()->globalObject();
auto& lexicalGlobalObject = globalObject;
JSC::ArgList noArgs;
JSC::JSValue thisObject = { JSC::construct(&lexicalGlobalObject, paintConstructor, noArgs, "Failed to construct paint class"_s) };
if (UNLIKELY(scope.exception())) {
reportException(&lexicalGlobalObject, scope.exception());
return ImageDrawResult::DidNothing;
}
auto result = callback.handleEvent(WTFMove(thisObject), *context, size, propertyMap, m_arguments);
if (result.type() != CallbackResultType::Success)
return ImageDrawResult::DidNothing;
canvas->replayDisplayList(&destContext);
return ImageDrawResult::DidDraw;
}
ImageDrawResult CustomPaintImage::draw(GraphicsContext& destContext, const FloatRect& destRect, const FloatRect& srcRect, const ImagePaintingOptions& options)
{
GraphicsContextStateSaver stateSaver(destContext);
destContext.setCompositeOperation(options.compositeOperator(), options.blendMode());
destContext.clip(destRect);
destContext.translate(destRect.location());
if (destRect.size() != srcRect.size())
destContext.scale(destRect.size() / srcRect.size());
destContext.translate(-srcRect.location());
return doCustomPaint(destContext, size());
}
void CustomPaintImage::drawPattern(GraphicsContext& destContext, const FloatRect& destRect, const FloatRect& srcRect, const AffineTransform& patternTransform,
const FloatPoint& phase, const FloatSize& spacing, const ImagePaintingOptions& options)
{
// Allow the generator to provide visually-equivalent tiling parameters for better performance.
FloatSize adjustedSize = size();
FloatRect adjustedSrcRect = srcRect;
// Factor in the destination context's scale to generate at the best resolution
AffineTransform destContextCTM = destContext.getCTM(GraphicsContext::DefinitelyIncludeDeviceScale);
double xScale = std::abs(destContextCTM.xScale());
double yScale = std::abs(destContextCTM.yScale());
AffineTransform adjustedPatternCTM = patternTransform;
adjustedPatternCTM.scale(1.0 / xScale, 1.0 / yScale);
adjustedSrcRect.scale(xScale, yScale);
auto buffer = destContext.createAlignedImageBuffer(adjustedSize);
if (!buffer)
return;
doCustomPaint(buffer->context(), adjustedSize);
if (destContext.drawLuminanceMask())
buffer->convertToLuminanceMask();
destContext.drawPattern(*buffer, destRect, adjustedSrcRect, adjustedPatternCTM, phase, spacing, options);
destContext.setDrawLuminanceMask(false);
}
}
#endif
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