void RenderSVGResourceFilter::postApplyResource(RenderElement& renderer, GraphicsContext*& context, unsigned short resourceMode, const Path*, const RenderSVGShape*)
{
ASSERT(context);
ASSERT_UNUSED(resourceMode, resourceMode == ApplyToDefaultMode);
FilterData* filterData = m_filter.get(&renderer);
if (!filterData)
return;
switch (filterData->state) {
case FilterData::MarkedForRemoval:
m_filter.remove(&renderer);
return;
case FilterData::CycleDetected:
case FilterData::Applying:
// We have a cycle if we are already applying the data.
// This can occur due to FeImage referencing a source that makes use of the FEImage itself.
// This is the first place we've hit the cycle, so set the state back to PaintingSource so the return stack
// will continue correctly.
filterData->state = FilterData::PaintingSource;
return;
case FilterData::PaintingSource:
if (!filterData->savedContext) {
removeClientFromCache(renderer);
return;
}
context = filterData->savedContext;
filterData->savedContext = 0;
break;
case FilterData::Built:
{ } // Empty
}
FilterEffect* lastEffect = filterData->builder->lastEffect();
if (lastEffect && !filterData->boundaries.isEmpty() && !lastEffect->filterPrimitiveSubregion().isEmpty()) {
// This is the real filtering of the object. It just needs to be called on the
// initial filtering process. We just take the stored filter result on a
// second drawing.
if (filterData->state != FilterData::Built)
filterData->filter->setSourceImage(WTF::move(filterData->sourceGraphicBuffer));
// Always true if filterData is just built (filterData->state == FilterData::Built).
if (!lastEffect->hasResult()) {
filterData->state = FilterData::Applying;
lastEffect->applyAll();
lastEffect->correctFilterResultIfNeeded();
lastEffect->transformResultColorSpace(ColorSpaceDeviceRGB);
}
filterData->state = FilterData::Built;
ImageBuffer* resultImage = lastEffect->asImageBuffer();
if (resultImage) {
context->concatCTM(filterData->shearFreeAbsoluteTransform.inverse());
context->scale(FloatSize(1 / filterData->filter->filterResolution().width(), 1 / filterData->filter->filterResolution().height()));
context->drawImageBuffer(resultImage, renderer.style().colorSpace(), lastEffect->absolutePaintRect());
context->scale(filterData->filter->filterResolution());
context->concatCTM(filterData->shearFreeAbsoluteTransform);
}
}
filterData->sourceGraphicBuffer.reset();
}
