| /* |
| * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) Research In Motion Limited 2010. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| #include "RenderSVGResourcePattern.h" |
| |
| #include "ElementIterator.h" |
| #include "FrameView.h" |
| #include "GraphicsContext.h" |
| #include "RenderSVGRoot.h" |
| #include "SVGFitToViewBox.h" |
| #include "SVGRenderingContext.h" |
| #include "SVGResources.h" |
| #include "SVGResourcesCache.h" |
| #include <wtf/IsoMallocInlines.h> |
| |
| namespace WebCore { |
| |
| WTF_MAKE_ISO_ALLOCATED_IMPL(RenderSVGResourcePattern); |
| |
| RenderSVGResourcePattern::RenderSVGResourcePattern(SVGPatternElement& element, RenderStyle&& style) |
| : RenderSVGResourceContainer(element, WTFMove(style)) |
| { |
| } |
| |
| SVGPatternElement& RenderSVGResourcePattern::patternElement() const |
| { |
| return downcast<SVGPatternElement>(RenderSVGResourceContainer::element()); |
| } |
| |
| void RenderSVGResourcePattern::removeAllClientsFromCache(bool markForInvalidation) |
| { |
| m_patternMap.clear(); |
| m_shouldCollectPatternAttributes = true; |
| markAllClientsForInvalidation(markForInvalidation ? RepaintInvalidation : ParentOnlyInvalidation); |
| } |
| |
| void RenderSVGResourcePattern::removeClientFromCache(RenderElement& client, bool markForInvalidation) |
| { |
| m_patternMap.remove(&client); |
| markClientForInvalidation(client, markForInvalidation ? RepaintInvalidation : ParentOnlyInvalidation); |
| } |
| |
| void RenderSVGResourcePattern::collectPatternAttributes(PatternAttributes& attributes) const |
| { |
| const RenderSVGResourcePattern* current = this; |
| |
| while (current) { |
| const SVGPatternElement& pattern = current->patternElement(); |
| pattern.collectPatternAttributes(attributes); |
| |
| auto* resources = SVGResourcesCache::cachedResourcesForRenderer(*current); |
| ASSERT_IMPLIES(resources && resources->linkedResource(), is<RenderSVGResourcePattern>(resources->linkedResource())); |
| current = resources ? downcast<RenderSVGResourcePattern>(resources->linkedResource()) : nullptr; |
| } |
| } |
| |
| PatternData* RenderSVGResourcePattern::buildPattern(RenderElement& renderer, OptionSet<RenderSVGResourceMode> resourceMode, GraphicsContext& context) |
| { |
| ASSERT(!m_shouldCollectPatternAttributes); |
| |
| PatternData* currentData = m_patternMap.get(&renderer); |
| if (currentData && currentData->pattern) |
| return currentData; |
| |
| // If we couldn't determine the pattern content element root, stop here. |
| if (!m_attributes.patternContentElement()) |
| return nullptr; |
| |
| // An empty viewBox disables rendering. |
| if (m_attributes.hasViewBox() && m_attributes.viewBox().isEmpty()) |
| return nullptr; |
| |
| // Compute all necessary transformations to build the tile image & the pattern. |
| FloatRect tileBoundaries; |
| AffineTransform tileImageTransform; |
| if (!buildTileImageTransform(renderer, m_attributes, patternElement(), tileBoundaries, tileImageTransform)) |
| return nullptr; |
| |
| AffineTransform absoluteTransformIgnoringRotation = SVGRenderingContext::calculateTransformationToOutermostCoordinateSystem(renderer); |
| |
| // Ignore 2D rotation, as it doesn't affect the size of the tile. |
| SVGRenderingContext::clear2DRotation(absoluteTransformIgnoringRotation); |
| FloatRect absoluteTileBoundaries = absoluteTransformIgnoringRotation.mapRect(tileBoundaries); |
| FloatRect clampedAbsoluteTileBoundaries; |
| |
| // Scale the tile size to match the scale level of the patternTransform. |
| absoluteTileBoundaries.scale(static_cast<float>(m_attributes.patternTransform().xScale()), |
| static_cast<float>(m_attributes.patternTransform().yScale())); |
| |
| // Build tile image. |
| auto tileImage = createTileImage(m_attributes, tileBoundaries, absoluteTileBoundaries, tileImageTransform, clampedAbsoluteTileBoundaries, context.renderingMode()); |
| if (!tileImage) |
| return nullptr; |
| |
| const IntSize tileImageSize = tileImage->logicalSize(); |
| |
| RefPtr<Image> copiedImage = ImageBuffer::sinkIntoImage(WTFMove(tileImage)); |
| if (!copiedImage) |
| return nullptr; |
| |
| // Build pattern. |
| auto patternData = std::make_unique<PatternData>(); |
| patternData->pattern = Pattern::create(copiedImage.releaseNonNull(), true, true); |
| |
| // Compute pattern space transformation. |
| |
| patternData->transform.translate(tileBoundaries.location()); |
| patternData->transform.scale(tileBoundaries.size() / tileImageSize); |
| |
| AffineTransform patternTransform = m_attributes.patternTransform(); |
| if (!patternTransform.isIdentity()) |
| patternData->transform = patternTransform * patternData->transform; |
| |
| // Account for text drawing resetting the context to non-scaled, see SVGInlineTextBox::paintTextWithShadows. |
| if (resourceMode.contains(RenderSVGResourceMode::ApplyToText)) { |
| AffineTransform additionalTextTransformation; |
| if (shouldTransformOnTextPainting(renderer, additionalTextTransformation)) |
| patternData->transform *= additionalTextTransformation; |
| } |
| patternData->pattern->setPatternSpaceTransform(patternData->transform); |
| |
| // Various calls above may trigger invalidations in some fringe cases (ImageBuffer allocation |
| // failures in the SVG image cache for example). To avoid having our PatternData deleted by |
| // removeAllClientsFromCache(), we only make it visible in the cache at the very end. |
| return m_patternMap.set(&renderer, WTFMove(patternData)).iterator->value.get(); |
| } |
| |
| bool RenderSVGResourcePattern::applyResource(RenderElement& renderer, const RenderStyle& style, GraphicsContext*& context, OptionSet<RenderSVGResourceMode> resourceMode) |
| { |
| ASSERT(context); |
| ASSERT(!resourceMode.isEmpty()); |
| |
| if (m_shouldCollectPatternAttributes) { |
| patternElement().synchronizeAllAttributes(); |
| |
| m_attributes = PatternAttributes(); |
| collectPatternAttributes(m_attributes); |
| m_shouldCollectPatternAttributes = false; |
| } |
| |
| // Spec: When the geometry of the applicable element has no width or height and objectBoundingBox is specified, |
| // then the given effect (e.g. a gradient or a filter) will be ignored. |
| FloatRect objectBoundingBox = renderer.objectBoundingBox(); |
| if (m_attributes.patternUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX && objectBoundingBox.isEmpty()) |
| return false; |
| |
| PatternData* patternData = buildPattern(renderer, resourceMode, *context); |
| if (!patternData) |
| return false; |
| |
| // Draw pattern |
| context->save(); |
| |
| const SVGRenderStyle& svgStyle = style.svgStyle(); |
| |
| if (resourceMode.contains(RenderSVGResourceMode::ApplyToFill)) { |
| context->setAlpha(svgStyle.fillOpacity()); |
| context->setFillPattern(*patternData->pattern); |
| context->setFillRule(svgStyle.fillRule()); |
| } else if (resourceMode.contains(RenderSVGResourceMode::ApplyToStroke)) { |
| if (svgStyle.vectorEffect() == VectorEffect::NonScalingStroke) |
| patternData->pattern->setPatternSpaceTransform(transformOnNonScalingStroke(&renderer, patternData->transform)); |
| context->setAlpha(svgStyle.strokeOpacity()); |
| context->setStrokePattern(*patternData->pattern); |
| SVGRenderSupport::applyStrokeStyleToContext(context, style, renderer); |
| } |
| |
| if (resourceMode.contains(RenderSVGResourceMode::ApplyToText)) { |
| if (resourceMode.contains(RenderSVGResourceMode::ApplyToFill)) { |
| context->setTextDrawingMode(TextModeFill); |
| |
| #if USE(CG) |
| context->applyFillPattern(); |
| #endif |
| } else if (resourceMode.contains(RenderSVGResourceMode::ApplyToStroke)) { |
| context->setTextDrawingMode(TextModeStroke); |
| |
| #if USE(CG) |
| context->applyStrokePattern(); |
| #endif |
| } |
| } |
| |
| return true; |
| } |
| |
| void RenderSVGResourcePattern::postApplyResource(RenderElement&, GraphicsContext*& context, OptionSet<RenderSVGResourceMode> resourceMode, const Path* path, const RenderSVGShape* shape) |
| { |
| ASSERT(context); |
| ASSERT(!resourceMode.isEmpty()); |
| |
| if (resourceMode.contains(RenderSVGResourceMode::ApplyToFill)) { |
| if (path) |
| context->fillPath(*path); |
| else if (shape) |
| shape->fillShape(*context); |
| } |
| if (resourceMode.contains(RenderSVGResourceMode::ApplyToStroke)) { |
| if (path) |
| context->strokePath(*path); |
| else if (shape) |
| shape->strokeShape(*context); |
| } |
| |
| context->restore(); |
| } |
| |
| static inline FloatRect calculatePatternBoundaries(const PatternAttributes& attributes, |
| const FloatRect& objectBoundingBox, |
| const SVGPatternElement& patternElement) |
| { |
| return SVGLengthContext::resolveRectangle(&patternElement, attributes.patternUnits(), objectBoundingBox, attributes.x(), attributes.y(), attributes.width(), attributes.height()); |
| } |
| |
| bool RenderSVGResourcePattern::buildTileImageTransform(RenderElement& renderer, |
| const PatternAttributes& attributes, |
| const SVGPatternElement& patternElement, |
| FloatRect& patternBoundaries, |
| AffineTransform& tileImageTransform) const |
| { |
| FloatRect objectBoundingBox = renderer.objectBoundingBox(); |
| patternBoundaries = calculatePatternBoundaries(attributes, objectBoundingBox, patternElement); |
| if (patternBoundaries.width() <= 0 || patternBoundaries.height() <= 0) |
| return false; |
| |
| AffineTransform viewBoxCTM = SVGFitToViewBox::viewBoxToViewTransform(attributes.viewBox(), attributes.preserveAspectRatio(), patternBoundaries.width(), patternBoundaries.height()); |
| |
| // Apply viewBox/objectBoundingBox transformations. |
| if (!viewBoxCTM.isIdentity()) |
| tileImageTransform = viewBoxCTM; |
| else if (attributes.patternContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) |
| tileImageTransform.scale(objectBoundingBox.width(), objectBoundingBox.height()); |
| |
| return true; |
| } |
| |
| std::unique_ptr<ImageBuffer> RenderSVGResourcePattern::createTileImage(const PatternAttributes& attributes, const FloatRect& tileBoundaries, const FloatRect& absoluteTileBoundaries, const AffineTransform& tileImageTransform, FloatRect& clampedAbsoluteTileBoundaries, RenderingMode renderingMode) const |
| { |
| clampedAbsoluteTileBoundaries = ImageBuffer::clampedRect(absoluteTileBoundaries); |
| auto tileImage = SVGRenderingContext::createImageBuffer(absoluteTileBoundaries, clampedAbsoluteTileBoundaries, ColorSpaceSRGB, renderingMode); |
| if (!tileImage) |
| return nullptr; |
| |
| GraphicsContext& tileImageContext = tileImage->context(); |
| |
| // The image buffer represents the final rendered size, so the content has to be scaled (to avoid pixelation). |
| tileImageContext.scale(clampedAbsoluteTileBoundaries.size() / tileBoundaries.size()); |
| |
| // Apply tile image transformations. |
| if (!tileImageTransform.isIdentity()) |
| tileImageContext.concatCTM(tileImageTransform); |
| |
| AffineTransform contentTransformation; |
| if (attributes.patternContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) |
| contentTransformation = tileImageTransform; |
| |
| // Draw the content into the ImageBuffer. |
| for (auto& child : childrenOfType<SVGElement>(*attributes.patternContentElement())) { |
| if (!child.renderer()) |
| continue; |
| if (child.renderer()->needsLayout()) |
| return nullptr; |
| SVGRenderingContext::renderSubtreeToImageBuffer(tileImage.get(), *child.renderer(), contentTransformation); |
| } |
| |
| return tileImage; |
| } |
| |
| } |
