| /* |
| * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved. |
| * Copyright (C) 2013 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 THE COPYRIGHT HOLDER "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 THE COPYRIGHT HOLDER 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 "RenderLayerFilters.h" |
| |
| #include "CSSFilter.h" |
| #include "CachedSVGDocument.h" |
| #include "CachedSVGDocumentReference.h" |
| #include "Logging.h" |
| #include "RenderSVGResourceFilter.h" |
| #include <wtf/NeverDestroyed.h> |
| |
| namespace WebCore { |
| |
| RenderLayerFilters::RenderLayerFilters(RenderLayer& layer) |
| : m_layer(layer) |
| { |
| } |
| |
| RenderLayerFilters::~RenderLayerFilters() |
| { |
| removeReferenceFilterClients(); |
| } |
| |
| void RenderLayerFilters::setFilter(RefPtr<CSSFilter>&& filter) |
| { |
| m_filter = WTFMove(filter); |
| } |
| |
| bool RenderLayerFilters::hasFilterThatMovesPixels() const |
| { |
| return m_filter && m_filter->hasFilterThatMovesPixels(); |
| } |
| |
| bool RenderLayerFilters::hasFilterThatShouldBeRestrictedBySecurityOrigin() const |
| { |
| return m_filter && m_filter->hasFilterThatShouldBeRestrictedBySecurityOrigin(); |
| } |
| |
| void RenderLayerFilters::notifyFinished(CachedResource&) |
| { |
| // FIXME: This really shouldn't have to invalidate layer composition, |
| // but tests like css3/filters/effect-reference-delete.html fail if that doesn't happen. |
| if (auto* enclosingElement = m_layer.enclosingElement()) |
| enclosingElement->invalidateStyleAndLayerComposition(); |
| m_layer.renderer().repaint(); |
| } |
| |
| void RenderLayerFilters::updateReferenceFilterClients(const FilterOperations& operations) |
| { |
| removeReferenceFilterClients(); |
| |
| for (auto& operation : operations.operations()) { |
| if (!is<ReferenceFilterOperation>(*operation)) |
| continue; |
| |
| auto& referenceOperation = downcast<ReferenceFilterOperation>(*operation); |
| auto* documentReference = referenceOperation.cachedSVGDocumentReference(); |
| if (auto* cachedSVGDocument = documentReference ? documentReference->document() : nullptr) { |
| // Reference is external; wait for notifyFinished(). |
| cachedSVGDocument->addClient(*this); |
| m_externalSVGReferences.append(cachedSVGDocument); |
| } else { |
| // Reference is internal; add layer as a client so we can trigger filter repaint on SVG attribute change. |
| auto* filterElement = m_layer.renderer().document().getElementById(referenceOperation.fragment()); |
| if (!filterElement) |
| continue; |
| auto* renderer = filterElement->renderer(); |
| if (!is<RenderSVGResourceFilter>(renderer)) |
| continue; |
| downcast<RenderSVGResourceFilter>(*renderer).addClientRenderLayer(&m_layer); |
| m_internalSVGReferences.append(filterElement); |
| } |
| } |
| } |
| |
| void RenderLayerFilters::removeReferenceFilterClients() |
| { |
| for (auto& resourceHandle : m_externalSVGReferences) |
| resourceHandle->removeClient(*this); |
| |
| m_externalSVGReferences.clear(); |
| |
| for (auto& filterElement : m_internalSVGReferences) { |
| if (auto* renderer = filterElement->renderer()) |
| downcast<RenderSVGResourceContainer>(*renderer).removeClientRenderLayer(&m_layer); |
| } |
| m_internalSVGReferences.clear(); |
| } |
| |
| void RenderLayerFilters::buildFilter(RenderElement& renderer, float scaleFactor, RenderingMode renderingMode) |
| { |
| if (!m_filter) { |
| m_filter = CSSFilter::create(); |
| m_filter->setFilterScale(scaleFactor); |
| m_filter->setRenderingMode(renderingMode); |
| } else if (m_filter->filterScale() != scaleFactor) { |
| m_filter->setFilterScale(scaleFactor); |
| m_filter->clearIntermediateResults(); |
| } |
| |
| // If the filter fails to build, remove it from the layer. It will still attempt to |
| // go through regular processing (e.g. compositing), but never apply anything. |
| // FIXME: this rebuilds the entire effects chain even if the filter style didn't change. |
| if (!m_filter->build(renderer, renderer.style().filter(), FilterConsumer::FilterProperty)) |
| m_filter = nullptr; |
| } |
| |
| GraphicsContext* RenderLayerFilters::beginFilterEffect(GraphicsContext& destinationContext, const LayoutRect& filterBoxRect, const LayoutRect& dirtyRect, const LayoutRect& layerRepaintRect) |
| { |
| if (!m_filter) |
| return nullptr; |
| |
| auto& filter = *m_filter; |
| auto filterSourceRect = filter.computeSourceImageRectForDirtyRect(filterBoxRect, dirtyRect); |
| if (filterSourceRect.isEmpty()) |
| return nullptr; |
| |
| bool hasUpdatedBackingStore = filter.updateBackingStoreRect(filterSourceRect); |
| if (!filter.hasFilterThatMovesPixels()) |
| m_repaintRect = dirtyRect; |
| else { |
| if (hasUpdatedBackingStore) |
| m_repaintRect = filterSourceRect; |
| else { |
| m_repaintRect = dirtyRect; |
| m_repaintRect.unite(layerRepaintRect); |
| m_repaintRect.intersect(filterSourceRect); |
| } |
| } |
| m_paintOffset = filterSourceRect.location(); |
| resetDirtySourceRect(); |
| |
| filter.determineFilterPrimitiveSubregion(); |
| |
| filter.allocateBackingStoreIfNeeded(destinationContext); |
| auto* sourceGraphicsContext = filter.inputContext(); |
| if (!sourceGraphicsContext || filter.filterRegion().isEmpty() || ImageBuffer::sizeNeedsClamping(filter.filterRegion().size())) |
| return nullptr; |
| |
| // Translate the context so that the contents of the layer is captured in the offscreen memory buffer. |
| sourceGraphicsContext->save(); |
| sourceGraphicsContext->translate(-m_paintOffset); |
| sourceGraphicsContext->clearRect(m_repaintRect); |
| sourceGraphicsContext->clip(m_repaintRect); |
| |
| return sourceGraphicsContext; |
| } |
| |
| void RenderLayerFilters::applyFilterEffect(GraphicsContext& destinationContext) |
| { |
| ASSERT(m_filter->inputContext()); |
| |
| LOG_WITH_STREAM(Filters, stream << "\nRenderLayerFilters " << this << " applyFilterEffect"); |
| |
| auto& filter = *m_filter; |
| filter.inputContext()->restore(); |
| |
| filter.apply(); |
| |
| // Get the filtered output and draw it in place. |
| LayoutRect destRect = filter.outputRect(); |
| destRect.move(m_paintOffset.x(), m_paintOffset.y()); |
| |
| if (auto* outputBuffer = filter.output()) |
| destinationContext.drawImageBuffer(*outputBuffer, snapRectToDevicePixels(destRect, m_layer.renderer().document().deviceScaleFactor())); |
| |
| filter.clearIntermediateResults(); |
| |
| LOG_WITH_STREAM(Filters, stream << "RenderLayerFilters " << this << " applyFilterEffect done\n"); |
| } |
| |
| } // namespace WebCore |