GraphicsContext* FilterEffectRendererHelper::beginFilterEffect(GraphicsContext* oldContext)
{
ASSERT(m_renderLayer);
FilterEffectRenderer* filter = m_renderLayer->filterRenderer();
filter->allocateBackingStoreIfNeeded();
// Paint into the context that represents the SourceGraphic of the filter.
GraphicsContext* sourceGraphicsContext = filter->inputContext();
if (!sourceGraphicsContext || !FilterEffect::isFilterSizeValid(filter->absoluteFilterRegion())) {
// Disable the filters and continue.
m_haveFilterEffect = false;
return oldContext;
}
m_savedGraphicsContext = oldContext;
// Translate the context so that the contents of the layer is captuterd in the offscreen memory buffer.
sourceGraphicsContext->save();
// FIXME: can we just use sourceImageRect for everything, and get rid of
// m_repaintRect?
FloatPoint offset = filter->sourceImageRect().location();
sourceGraphicsContext->translate(-offset.x(), -offset.y());
sourceGraphicsContext->clearRect(m_repaintRect);
sourceGraphicsContext->clip(m_repaintRect);
return sourceGraphicsContext;
}
GraphicsContext* FilterEffectRendererHelper::beginFilterEffect(GraphicsContext* context)
{
ASSERT(m_renderLayer);
FilterEffectRenderer* filter = m_renderLayer->filterRenderer();
if (m_renderLayer->renderer()->document().settings()->deferredFiltersEnabled()) {
SkiaImageFilterBuilder builder(context);
RefPtr<ImageFilter> imageFilter = builder.build(filter->lastEffect().get(), ColorSpaceDeviceRGB);
if (!imageFilter) {
m_haveFilterEffect = false;
return context;
}
m_savedGraphicsContext = context;
context->save();
FloatRect boundaries = mapImageFilterRect(imageFilter.get(), m_filterBoxRect);
context->translate(m_filterBoxRect.x(), m_filterBoxRect.y());
boundaries.move(-m_filterBoxRect.x(), -m_filterBoxRect.y());
context->beginLayer(1, CompositeSourceOver, &boundaries, ColorFilterNone, imageFilter.get());
context->translate(-m_filterBoxRect.x(), -m_filterBoxRect.y());
return context;
}
filter->allocateBackingStoreIfNeeded();
// Paint into the context that represents the SourceGraphic of the filter.
GraphicsContext* sourceGraphicsContext = filter->inputContext();
if (!sourceGraphicsContext || !FilterEffect::isFilterSizeValid(filter->absoluteFilterRegion())) {
// Disable the filters and continue.
m_haveFilterEffect = false;
return context;
}
m_savedGraphicsContext = context;
// Translate the context so that the contents of the layer is captuterd in the offscreen memory buffer.
sourceGraphicsContext->save();
// FIXME: can we just use sourceImageRect for everything, and get rid of
// m_paintInvalidationRect?
FloatPoint offset = filter->sourceImageRect().location();
sourceGraphicsContext->translate(-offset.x(), -offset.y());
sourceGraphicsContext->clearRect(m_paintInvalidationRect);
sourceGraphicsContext->clip(m_paintInvalidationRect);
return sourceGraphicsContext;
}