FilterEffectRendererCoreImage.mm [plain text]
/*
* Copyright (C) 2020 Apple Inc. All rights reserved.
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#import "config.h"
#import "FilterEffectRendererCoreImage.h"
#if USE(CORE_IMAGE)
#import "Filter.h"
#import "FilterEffect.h"
#import "GraphicsContextCG.h"
#import "ImageBuffer.h"
#import "PlatformImageBuffer.h"
#import <CoreImage/CIContext.h>
#import <CoreImage/CIFilter.h>
#import <CoreImage/CoreImage.h>
namespace WebCore {
std::unique_ptr<FilterEffectRendererCoreImage> FilterEffectRendererCoreImage::tryCreate(FilterEffect& lastEffect)
{
if (canRenderUsingCIFilters(lastEffect))
return makeUnique<FilterEffectRendererCoreImage>();
return nullptr;
}
bool FilterEffectRendererCoreImage::supportsCoreImageRendering(FilterEffect& effect)
{
// FIXME: change return value to true once they are implemented
switch (effect.filterEffectClassType()) {
case FilterEffect::Type::Blend:
case FilterEffect::Type::ColorMatrix:
case FilterEffect::Type::ComponentTransfer:
case FilterEffect::Type::Composite:
case FilterEffect::Type::ConvolveMatrix:
case FilterEffect::Type::DiffuseLighting:
case FilterEffect::Type::DisplacementMap:
case FilterEffect::Type::DropShadow:
case FilterEffect::Type::Flood:
case FilterEffect::Type::GaussianBlur:
case FilterEffect::Type::Image:
case FilterEffect::Type::Lighting:
case FilterEffect::Type::Merge:
case FilterEffect::Type::Morphology:
case FilterEffect::Type::Offset:
case FilterEffect::Type::SpecularLighting:
case FilterEffect::Type::Tile:
case FilterEffect::Type::Turbulence:
case FilterEffect::Type::SourceAlpha:
case FilterEffect::Type::SourceGraphic:
return false;
}
return false;
}
void FilterEffectRendererCoreImage::applyEffects(FilterEffect& lastEffect)
{
m_outputImage = connectCIFilters(lastEffect);
if (!m_outputImage)
return;
renderToImageBuffer(lastEffect);
}
CIImage* FilterEffectRendererCoreImage::connectCIFilters(FilterEffect& effect)
{
Vector<CIImage*> inputImages;
for (auto in : effect.inputEffects()) {
CIImage* inputImage = connectCIFilters(*in);
if (!inputImage)
return nullptr;
inputImages.append(inputImage);
}
effect.determineAbsolutePaintRect();
effect.setResultColorSpace(effect.operatingColorSpace());
if (effect.absolutePaintRect().isEmpty() || ImageBuffer::sizeNeedsClamping(effect.absolutePaintRect().size()))
return nullptr;
// FIXME: Implement those filters using CIFilter so that the function returns a valid CIImage
switch (effect.filterEffectClassType()) {
case FilterEffect::Type::Blend:
case FilterEffect::Type::ColorMatrix:
case FilterEffect::Type::ComponentTransfer:
case FilterEffect::Type::Composite:
case FilterEffect::Type::ConvolveMatrix:
case FilterEffect::Type::DiffuseLighting:
case FilterEffect::Type::DisplacementMap:
case FilterEffect::Type::DropShadow:
case FilterEffect::Type::Flood:
case FilterEffect::Type::GaussianBlur:
case FilterEffect::Type::Image:
case FilterEffect::Type::Lighting:
case FilterEffect::Type::Merge:
case FilterEffect::Type::Morphology:
case FilterEffect::Type::Offset:
case FilterEffect::Type::SpecularLighting:
case FilterEffect::Type::Tile:
case FilterEffect::Type::Turbulence:
case FilterEffect::Type::SourceAlpha:
case FilterEffect::Type::SourceGraphic:
default:
return nullptr;
}
return nullptr;
}
bool FilterEffectRendererCoreImage::canRenderUsingCIFilters(FilterEffect& effect)
{
if (!supportsCoreImageRendering(effect))
return false;
for (auto in : effect.inputEffects()) {
if (!supportsCoreImageRendering(*in) || !canRenderUsingCIFilters(*in))
return false;
}
return true;
}
ImageBuffer* FilterEffectRendererCoreImage::output() const
{
return m_outputImageBuffer.get();
}
void FilterEffectRendererCoreImage::renderToImageBuffer(FilterEffect& lastEffect)
{
FloatSize clampedSize = ImageBuffer::clampedSize(lastEffect.absolutePaintRect().size());
m_outputImageBuffer = ImageBuffer::create(clampedSize, RenderingMode::Accelerated, lastEffect.filter().filterScale(), lastEffect.resultColorSpace());
if (!m_outputImageBuffer) {
clearResult();
return;
}
// FIXME: In the situation where the Image is too large, an UnacceleratedImageBuffer will be created
// in this case, special handling is needed to render to ImageBufferCGBackend instead
if (!is<AcceleratedImageBuffer>(*m_outputImageBuffer))
return;
auto& surface = downcast<AcceleratedImageBuffer>(*m_outputImageBuffer).surface();
CGColorSpaceRef resultColorSpace = cachedCGColorSpace(lastEffect.resultColorSpace());
[m_context.get() render: m_outputImage.get() toIOSurface: surface.surface() bounds:destRect(lastEffect) colorSpace:resultColorSpace];
}
FloatRect FilterEffectRendererCoreImage::destRect(const FilterEffect& lastEffect) const
{
IntSize destSize = lastEffect.absolutePaintRect().size();
destSize.scale(lastEffect.filter().filterScale());
FloatRect destRect = FloatRect(FloatPoint(), destSize);
return destRect;
}
void FilterEffectRendererCoreImage::clearResult()
{
m_outputImageBuffer.reset();
m_ciFilterStorageMap.clear();
m_outputImage = nullptr;
m_context = nullptr;
}
FilterEffectRendererCoreImage::FilterEffectRendererCoreImage()
: FilterEffectRenderer()
{
CGColorSpaceRef colorSpace = cachedCGColorSpace(ColorSpace::SRGB);
m_context = [CIContext contextWithOptions: @{ kCIContextWorkingColorSpace: (__bridge id)colorSpace}];
}
} // namespace WebCore
#endif