| /* |
| * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) 2004, 2005, 2008 Rob Buis <buis@kde.org> |
| * Copyright (C) 2005, 2007 Eric Seidel <eric@webkit.org> |
| * Copyright (C) 2009 Google, Inc. |
| * Copyright (C) 2009 Dirk Schulze <krit@webkit.org> |
| * Copyright (C) Research In Motion Limited 2010. All rights reserved. |
| * Copyright (C) 2009 Jeff Schiller <codedread@gmail.com> |
| * Copyright (C) 2011 Renata Hodovan <reni@webkit.org> |
| * Copyright (C) 2011 University of Szeged |
| * |
| * 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 "core/rendering/svg/RenderSVGShape.h" |
| |
| #include "core/platform/graphics/GraphicsContextStateSaver.h" |
| #include "core/rendering/GraphicsContextAnnotator.h" |
| #include "core/rendering/HitTestRequest.h" |
| #include "core/rendering/LayoutRepainter.h" |
| #include "core/rendering/PointerEventsHitRules.h" |
| #include "core/rendering/svg/RenderSVGResourceMarker.h" |
| #include "core/rendering/svg/RenderSVGResourceSolidColor.h" |
| #include "core/rendering/svg/SVGPathData.h" |
| #include "core/rendering/svg/SVGRenderingContext.h" |
| #include "core/rendering/svg/SVGResources.h" |
| #include "core/rendering/svg/SVGResourcesCache.h" |
| #include "core/svg/SVGGraphicsElement.h" |
| #include "platform/geometry/FloatPoint.h" |
| #include "wtf/MathExtras.h" |
| |
| namespace WebCore { |
| |
| RenderSVGShape::RenderSVGShape(SVGGraphicsElement* node) |
| : RenderSVGModelObject(node) |
| , m_needsBoundariesUpdate(false) // Default is false, the cached rects are empty from the beginning. |
| , m_needsShapeUpdate(true) // Default is true, so we grab a Path object once from SVGGraphicsElement. |
| , m_needsTransformUpdate(true) // Default is true, so we grab a AffineTransform object once from SVGGraphicsElement. |
| { |
| } |
| |
| RenderSVGShape::~RenderSVGShape() |
| { |
| } |
| |
| void RenderSVGShape::updateShapeFromElement() |
| { |
| m_path.clear(); |
| m_path = adoptPtr(new Path); |
| ASSERT(RenderSVGShape::isEmpty()); |
| |
| updatePathFromGraphicsElement(toSVGGraphicsElement(element()), path()); |
| processMarkerPositions(); |
| |
| m_fillBoundingBox = calculateObjectBoundingBox(); |
| m_strokeBoundingBox = calculateStrokeBoundingBox(); |
| } |
| |
| bool RenderSVGShape::isEmpty() const |
| { |
| return path().isEmpty(); |
| } |
| |
| void RenderSVGShape::fillShape(GraphicsContext* context) const |
| { |
| context->fillPath(path()); |
| } |
| |
| void RenderSVGShape::strokeShape(GraphicsContext* context) const |
| { |
| ASSERT(m_path); |
| Path* usePath = m_path.get(); |
| |
| if (hasNonScalingStroke()) |
| usePath = nonScalingStrokePath(usePath, nonScalingStrokeTransform()); |
| |
| context->strokePath(*usePath); |
| } |
| |
| bool RenderSVGShape::shapeDependentStrokeContains(const FloatPoint& point) |
| { |
| ASSERT(m_path); |
| StrokeData strokeData; |
| SVGRenderSupport::applyStrokeStyleToStrokeData(&strokeData, style(), this); |
| |
| if (hasNonScalingStroke()) { |
| AffineTransform nonScalingTransform = nonScalingStrokeTransform(); |
| Path* usePath = nonScalingStrokePath(m_path.get(), nonScalingTransform); |
| |
| return usePath->strokeContains(nonScalingTransform.mapPoint(point), strokeData); |
| } |
| |
| return m_path->strokeContains(point, strokeData); |
| } |
| |
| bool RenderSVGShape::shapeDependentFillContains(const FloatPoint& point, const WindRule fillRule) const |
| { |
| return path().contains(point, fillRule); |
| } |
| |
| bool RenderSVGShape::fillContains(const FloatPoint& point, bool requiresFill, const WindRule fillRule) |
| { |
| if (!m_fillBoundingBox.contains(point)) |
| return false; |
| |
| Color fallbackColor; |
| if (requiresFill && !RenderSVGResource::fillPaintingResource(this, style(), fallbackColor)) |
| return false; |
| |
| return shapeDependentFillContains(point, fillRule); |
| } |
| |
| bool RenderSVGShape::strokeContains(const FloatPoint& point, bool requiresStroke) |
| { |
| if (!strokeBoundingBox().contains(point)) |
| return false; |
| |
| Color fallbackColor; |
| if (requiresStroke && !RenderSVGResource::strokePaintingResource(this, style(), fallbackColor)) |
| return false; |
| |
| return shapeDependentStrokeContains(point); |
| } |
| |
| void RenderSVGShape::layout() |
| { |
| LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this) && selfNeedsLayout()); |
| |
| bool updateCachedBoundariesInParents = false; |
| |
| if (m_needsShapeUpdate || m_needsBoundariesUpdate) { |
| updateShapeFromElement(); |
| m_needsShapeUpdate = false; |
| updateRepaintBoundingBox(); |
| m_needsBoundariesUpdate = false; |
| updateCachedBoundariesInParents = true; |
| } |
| |
| if (m_needsTransformUpdate) { |
| m_localTransform = toSVGGraphicsElement(element())->animatedLocalTransform(); |
| m_needsTransformUpdate = false; |
| updateCachedBoundariesInParents = true; |
| } |
| |
| // Invalidate all resources of this client if our layout changed. |
| if (everHadLayout() && selfNeedsLayout()) |
| SVGResourcesCache::clientLayoutChanged(this); |
| |
| // If our bounds changed, notify the parents. |
| if (updateCachedBoundariesInParents) |
| RenderSVGModelObject::setNeedsBoundariesUpdate(); |
| |
| repainter.repaintAfterLayout(); |
| clearNeedsLayout(); |
| } |
| |
| Path* RenderSVGShape::nonScalingStrokePath(const Path* path, const AffineTransform& strokeTransform) const |
| { |
| DEFINE_STATIC_LOCAL(Path, tempPath, ()); |
| |
| tempPath = *path; |
| tempPath.transform(strokeTransform); |
| |
| return &tempPath; |
| } |
| |
| bool RenderSVGShape::setupNonScalingStrokeContext(AffineTransform& strokeTransform, GraphicsContextStateSaver& stateSaver) |
| { |
| if (!strokeTransform.isInvertible()) |
| return false; |
| |
| stateSaver.save(); |
| stateSaver.context()->concatCTM(strokeTransform.inverse()); |
| return true; |
| } |
| |
| AffineTransform RenderSVGShape::nonScalingStrokeTransform() const |
| { |
| return toSVGGraphicsElement(element())->getScreenCTM(SVGLocatable::DisallowStyleUpdate); |
| } |
| |
| bool RenderSVGShape::shouldGenerateMarkerPositions() const |
| { |
| if (!style()->svgStyle()->hasMarkers()) |
| return false; |
| |
| if (!toSVGGraphicsElement(element())->supportsMarkers()) |
| return false; |
| |
| SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this); |
| if (!resources) |
| return false; |
| |
| return resources->markerStart() || resources->markerMid() || resources->markerEnd(); |
| } |
| |
| void RenderSVGShape::fillShape(RenderStyle* style, GraphicsContext* context) |
| { |
| Color fallbackColor; |
| if (RenderSVGResource* fillPaintingResource = RenderSVGResource::fillPaintingResource(this, style, fallbackColor)) { |
| if (fillPaintingResource->applyResource(this, style, context, ApplyToFillMode)) |
| fillPaintingResource->postApplyResource(this, context, ApplyToFillMode, 0, this); |
| else if (fallbackColor.isValid()) { |
| RenderSVGResourceSolidColor* fallbackResource = RenderSVGResource::sharedSolidPaintingResource(); |
| fallbackResource->setColor(fallbackColor); |
| if (fallbackResource->applyResource(this, style, context, ApplyToFillMode)) |
| fallbackResource->postApplyResource(this, context, ApplyToFillMode, 0, this); |
| } |
| } |
| } |
| |
| void RenderSVGShape::strokeShape(RenderStyle* style, GraphicsContext* context) |
| { |
| Color fallbackColor; |
| if (RenderSVGResource* strokePaintingResource = RenderSVGResource::strokePaintingResource(this, style, fallbackColor)) { |
| if (strokePaintingResource->applyResource(this, style, context, ApplyToStrokeMode)) |
| strokePaintingResource->postApplyResource(this, context, ApplyToStrokeMode, 0, this); |
| else if (fallbackColor.isValid()) { |
| RenderSVGResourceSolidColor* fallbackResource = RenderSVGResource::sharedSolidPaintingResource(); |
| fallbackResource->setColor(fallbackColor); |
| if (fallbackResource->applyResource(this, style, context, ApplyToStrokeMode)) |
| fallbackResource->postApplyResource(this, context, ApplyToStrokeMode, 0, this); |
| } |
| } |
| } |
| |
| void RenderSVGShape::paint(PaintInfo& paintInfo, const LayoutPoint&) |
| { |
| ANNOTATE_GRAPHICS_CONTEXT(paintInfo, this); |
| |
| if (paintInfo.context->paintingDisabled() || style()->visibility() == HIDDEN || isEmpty()) |
| return; |
| FloatRect boundingBox = repaintRectInLocalCoordinates(); |
| if (!SVGRenderSupport::paintInfoIntersectsRepaintRect(boundingBox, m_localTransform, paintInfo)) |
| return; |
| |
| PaintInfo childPaintInfo(paintInfo); |
| bool drawsOutline = style()->outlineWidth() && (childPaintInfo.phase == PaintPhaseOutline || childPaintInfo.phase == PaintPhaseSelfOutline); |
| if (drawsOutline || childPaintInfo.phase == PaintPhaseForeground) { |
| GraphicsContextStateSaver stateSaver(*childPaintInfo.context); |
| childPaintInfo.applyTransform(m_localTransform); |
| |
| if (childPaintInfo.phase == PaintPhaseForeground) { |
| SVGRenderingContext renderingContext(this, childPaintInfo); |
| |
| if (renderingContext.isRenderingPrepared()) { |
| const SVGRenderStyle* svgStyle = style()->svgStyle(); |
| if (svgStyle->shapeRendering() == SR_CRISPEDGES) |
| childPaintInfo.context->setShouldAntialias(false); |
| |
| for (int i = 0; i < 3; i++) { |
| switch (svgStyle->paintOrderType(i)) { |
| case PT_FILL: |
| fillShape(this->style(), childPaintInfo.context); |
| break; |
| case PT_STROKE: |
| if (svgStyle->hasVisibleStroke()) { |
| GraphicsContextStateSaver stateSaver(*childPaintInfo.context, false); |
| AffineTransform nonScalingTransform; |
| |
| if (hasNonScalingStroke()) { |
| AffineTransform nonScalingTransform = nonScalingStrokeTransform(); |
| if (!setupNonScalingStrokeContext(nonScalingTransform, stateSaver)) |
| return; |
| } |
| |
| strokeShape(this->style(), childPaintInfo.context); |
| } |
| break; |
| case PT_MARKERS: |
| if (!m_markerPositions.isEmpty()) |
| drawMarkers(childPaintInfo); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| break; |
| } |
| } |
| } |
| } |
| |
| if (drawsOutline) |
| paintOutline(childPaintInfo, IntRect(boundingBox)); |
| } |
| } |
| |
| // This method is called from inside paintOutline() since we call paintOutline() |
| // while transformed to our coord system, return local coords |
| void RenderSVGShape::addFocusRingRects(Vector<IntRect>& rects, const LayoutPoint&, const RenderLayerModelObject*) |
| { |
| IntRect rect = enclosingIntRect(repaintRectInLocalCoordinates()); |
| if (!rect.isEmpty()) |
| rects.append(rect); |
| } |
| |
| bool RenderSVGShape::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction) |
| { |
| // We only draw in the forground phase, so we only hit-test then. |
| if (hitTestAction != HitTestForeground) |
| return false; |
| |
| FloatPoint localPoint = m_localTransform.inverse().mapPoint(pointInParent); |
| |
| if (!SVGRenderSupport::pointInClippingArea(this, localPoint)) |
| return false; |
| |
| PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_PATH_HITTESTING, request, style()->pointerEvents()); |
| bool isVisible = (style()->visibility() == VISIBLE); |
| if (isVisible || !hitRules.requireVisible) { |
| const SVGRenderStyle* svgStyle = style()->svgStyle(); |
| WindRule fillRule = svgStyle->fillRule(); |
| if (request.svgClipContent()) |
| fillRule = svgStyle->clipRule(); |
| if ((hitRules.canHitStroke && (svgStyle->hasStroke() || !hitRules.requireStroke) && strokeContains(localPoint, hitRules.requireStroke)) |
| || (hitRules.canHitFill && (svgStyle->hasFill() || !hitRules.requireFill) && fillContains(localPoint, hitRules.requireFill, fillRule))) { |
| updateHitTestResult(result, roundedLayoutPoint(localPoint)); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static inline RenderSVGResourceMarker* markerForType(SVGMarkerType type, RenderSVGResourceMarker* markerStart, RenderSVGResourceMarker* markerMid, RenderSVGResourceMarker* markerEnd) |
| { |
| switch (type) { |
| case StartMarker: |
| return markerStart; |
| case MidMarker: |
| return markerMid; |
| case EndMarker: |
| return markerEnd; |
| } |
| |
| ASSERT_NOT_REACHED(); |
| return 0; |
| } |
| |
| FloatRect RenderSVGShape::markerRect(float strokeWidth) const |
| { |
| ASSERT(!m_markerPositions.isEmpty()); |
| |
| SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this); |
| ASSERT(resources); |
| |
| RenderSVGResourceMarker* markerStart = resources->markerStart(); |
| RenderSVGResourceMarker* markerMid = resources->markerMid(); |
| RenderSVGResourceMarker* markerEnd = resources->markerEnd(); |
| ASSERT(markerStart || markerMid || markerEnd); |
| |
| FloatRect boundaries; |
| unsigned size = m_markerPositions.size(); |
| for (unsigned i = 0; i < size; ++i) { |
| if (RenderSVGResourceMarker* marker = markerForType(m_markerPositions[i].type, markerStart, markerMid, markerEnd)) |
| boundaries.unite(marker->markerBoundaries(marker->markerTransformation(m_markerPositions[i].origin, m_markerPositions[i].angle, strokeWidth))); |
| } |
| return boundaries; |
| } |
| |
| FloatRect RenderSVGShape::calculateObjectBoundingBox() const |
| { |
| return path().boundingRect(); |
| } |
| |
| FloatRect RenderSVGShape::calculateStrokeBoundingBox() const |
| { |
| ASSERT(m_path); |
| FloatRect strokeBoundingBox = m_fillBoundingBox; |
| |
| if (style()->svgStyle()->hasStroke()) { |
| StrokeData strokeData; |
| SVGRenderSupport::applyStrokeStyleToStrokeData(&strokeData, style(), this); |
| if (hasNonScalingStroke()) { |
| AffineTransform nonScalingTransform = nonScalingStrokeTransform(); |
| if (nonScalingTransform.isInvertible()) { |
| Path* usePath = nonScalingStrokePath(m_path.get(), nonScalingTransform); |
| FloatRect strokeBoundingRect = usePath->strokeBoundingRect(strokeData); |
| strokeBoundingRect = nonScalingTransform.inverse().mapRect(strokeBoundingRect); |
| strokeBoundingBox.unite(strokeBoundingRect); |
| } |
| } else { |
| strokeBoundingBox.unite(path().strokeBoundingRect(strokeData)); |
| } |
| } |
| |
| if (!m_markerPositions.isEmpty()) |
| strokeBoundingBox.unite(markerRect(strokeWidth())); |
| |
| return strokeBoundingBox; |
| } |
| |
| void RenderSVGShape::updateRepaintBoundingBox() |
| { |
| m_repaintBoundingBox = strokeBoundingBox(); |
| if (strokeWidth() < 1.0f) |
| m_repaintBoundingBox.inflate(1); |
| SVGRenderSupport::intersectRepaintRectWithResources(this, m_repaintBoundingBox); |
| } |
| |
| float RenderSVGShape::strokeWidth() const |
| { |
| SVGLengthContext lengthContext(element()); |
| return style()->svgStyle()->strokeWidth().value(lengthContext); |
| } |
| |
| bool RenderSVGShape::hasSmoothStroke() const |
| { |
| const SVGRenderStyle* svgStyle = style()->svgStyle(); |
| return svgStyle->strokeDashArray().isEmpty() |
| && svgStyle->strokeMiterLimit() == svgStyle->initialStrokeMiterLimit() |
| && svgStyle->joinStyle() == svgStyle->initialJoinStyle() |
| && svgStyle->capStyle() == svgStyle->initialCapStyle(); |
| } |
| |
| void RenderSVGShape::drawMarkers(PaintInfo& paintInfo) |
| { |
| ASSERT(!m_markerPositions.isEmpty()); |
| |
| SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this); |
| if (!resources) |
| return; |
| |
| RenderSVGResourceMarker* markerStart = resources->markerStart(); |
| RenderSVGResourceMarker* markerMid = resources->markerMid(); |
| RenderSVGResourceMarker* markerEnd = resources->markerEnd(); |
| if (!markerStart && !markerMid && !markerEnd) |
| return; |
| |
| float strokeWidth = this->strokeWidth(); |
| unsigned size = m_markerPositions.size(); |
| for (unsigned i = 0; i < size; ++i) { |
| if (RenderSVGResourceMarker* marker = markerForType(m_markerPositions[i].type, markerStart, markerMid, markerEnd)) |
| marker->draw(paintInfo, marker->markerTransformation(m_markerPositions[i].origin, m_markerPositions[i].angle, strokeWidth)); |
| } |
| } |
| |
| void RenderSVGShape::processMarkerPositions() |
| { |
| m_markerPositions.clear(); |
| |
| if (!shouldGenerateMarkerPositions()) |
| return; |
| |
| ASSERT(m_path); |
| |
| SVGMarkerData markerData(m_markerPositions); |
| m_path->apply(&markerData, SVGMarkerData::updateFromPathElement); |
| markerData.pathIsDone(); |
| } |
| |
| } |
