/* Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann 2004, 2005, 2008 Rob Buis 2005, 2007 Eric Seidel 2009 Google, Inc. 2009 Dirk Schulze Copyright (C) Research In Motion Limited 2010. All rights reserved. 2009 Jeff Schiller 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 aint 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" #if ENABLE(SVG) #include "RenderPath.h" #include "FloatPoint.h" #include "FloatQuad.h" #include "GraphicsContext.h" #include "HitTestRequest.h" #include "PointerEventsHitRules.h" #include "RenderSVGContainer.h" #include "RenderSVGResourceMarker.h" #include "SVGRenderSupport.h" #include "SVGResources.h" #include "SVGStyledTransformableElement.h" #include "SVGTransformList.h" #include "SVGURIReference.h" #include "StrokeStyleApplier.h" #include namespace WebCore { class BoundingRectStrokeStyleApplier : public StrokeStyleApplier { public: BoundingRectStrokeStyleApplier(const RenderObject* object, RenderStyle* style) : m_object(object) , m_style(style) { ASSERT(style); ASSERT(object); } void strokeStyle(GraphicsContext* gc) { SVGRenderSupport::applyStrokeStyleToContext(gc, m_style, m_object); } private: const RenderObject* m_object; RenderStyle* m_style; }; RenderPath::RenderPath(SVGStyledTransformableElement* node) : RenderSVGModelObject(node) , m_needsBoundariesUpdate(false) // default is false, the cached rects are empty from the beginning , m_needsPathUpdate(true) // default is true, so we grab a Path object once from SVGStyledTransformableElement , m_needsTransformUpdate(true) // default is true, so we grab a AffineTransform object once from SVGStyledTransformableElement { } bool RenderPath::fillContains(const FloatPoint& point, bool requiresFill, WindRule fillRule) { if (!m_fillBoundingBox.contains(point)) return false; if (requiresFill && !RenderSVGResource::fillPaintingResource(this, style())) return false; return m_path.contains(point, fillRule); } bool RenderPath::strokeContains(const FloatPoint& point, bool requiresStroke) { if (!m_strokeAndMarkerBoundingBox.contains(point)) return false; if (requiresStroke && !RenderSVGResource::strokePaintingResource(this, style())) return false; BoundingRectStrokeStyleApplier strokeStyle(this, style()); return m_path.strokeContains(&strokeStyle, point); } void RenderPath::layout() { LayoutRepainter repainter(*this, checkForRepaintDuringLayout() && selfNeedsLayout()); SVGStyledTransformableElement* element = static_cast(node()); bool updateCachedBoundariesInParents = false; bool needsPathUpdate = m_needsPathUpdate; if (needsPathUpdate) { m_path = element->toPathData(); m_needsPathUpdate = false; updateCachedBoundariesInParents = true; } if (m_needsTransformUpdate) { m_localTransform = element->animatedLocalTransform(); m_needsTransformUpdate = false; updateCachedBoundariesInParents = true; } if (m_needsBoundariesUpdate) updateCachedBoundariesInParents = true; // Invalidate all resources of this client if our layout changed. if (m_everHadLayout && selfNeedsLayout()) SVGResourcesCache::clientLayoutChanged(this); // At this point LayoutRepainter already grabbed the old bounds, // recalculate them now so repaintAfterLayout() uses the new bounds. if (needsPathUpdate || m_needsBoundariesUpdate) { updateCachedBoundaries(); m_needsBoundariesUpdate = false; } // If our bounds changed, notify the parents. if (updateCachedBoundariesInParents) RenderSVGModelObject::setNeedsBoundariesUpdate(); repainter.repaintAfterLayout(); setNeedsLayout(false); } void RenderPath::fillAndStrokePath(GraphicsContext* context) { context->beginPath(); RenderStyle* style = this->style(); if (RenderSVGResource* fillPaintingResource = RenderSVGResource::fillPaintingResource(this, style)) { context->addPath(m_path); if (fillPaintingResource->applyResource(this, style, context, ApplyToFillMode)) fillPaintingResource->postApplyResource(this, context, ApplyToFillMode); } RenderSVGResource* strokePaintingResource = RenderSVGResource::strokePaintingResource(this, style); if (!strokePaintingResource) return; bool restoreContext = false; if (style->svgStyle()->vectorEffect() == VE_NON_SCALING_STROKE) { SVGStyledTransformableElement* element = static_cast(node()); AffineTransform nonScalingStrokeTransform = element->getScreenCTM(SVGLocatable::DisallowStyleUpdate); if (!nonScalingStrokeTransform.isInvertible()) return; Path transformedPath = m_path; transformedPath.transform(nonScalingStrokeTransform); context->save(); context->concatCTM(nonScalingStrokeTransform.inverse()); context->addPath(transformedPath); restoreContext = true; } else context->addPath(m_path); if (strokePaintingResource->applyResource(this, style, context, ApplyToStrokeMode)) strokePaintingResource->postApplyResource(this, context, ApplyToStrokeMode); if (restoreContext) context->restore(); } void RenderPath::paint(PaintInfo& paintInfo, int, int) { if (paintInfo.context->paintingDisabled() || style()->visibility() == HIDDEN || m_path.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) { childPaintInfo.context->save(); childPaintInfo.applyTransform(m_localTransform); if (childPaintInfo.phase == PaintPhaseForeground) { PaintInfo savedInfo(childPaintInfo); if (SVGRenderSupport::prepareToRenderSVGContent(this, childPaintInfo)) { const SVGRenderStyle* svgStyle = style()->svgStyle(); if (svgStyle->shapeRendering() == SR_CRISPEDGES) childPaintInfo.context->setShouldAntialias(false); fillAndStrokePath(childPaintInfo.context); if (svgStyle->hasMarkers()) m_markerLayoutInfo.drawMarkers(childPaintInfo); } SVGRenderSupport::finishRenderSVGContent(this, childPaintInfo, savedInfo.context); } if (drawsOutline) paintOutline(childPaintInfo.context, static_cast(boundingBox.x()), static_cast(boundingBox.y()), static_cast(boundingBox.width()), static_cast(boundingBox.height())); childPaintInfo.context->restore(); } } // This method is called from inside paintOutline() since we call paintOutline() // while transformed to our coord system, return local coords void RenderPath::addFocusRingRects(Vector& rects, int, int) { IntRect rect = enclosingIntRect(repaintRectInLocalCoordinates()); if (!rect.isEmpty()) rects.append(rect); } bool RenderPath::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, roundedIntPoint(localPoint)); return true; } } return false; } FloatRect RenderPath::calculateMarkerBoundsIfNeeded() { SVGElement* svgElement = static_cast(node()); ASSERT(svgElement && svgElement->document()); if (!svgElement->isStyled()) return FloatRect(); SVGStyledElement* styledElement = static_cast(svgElement); if (!styledElement->supportsMarkers()) return FloatRect(); const SVGRenderStyle* svgStyle = style()->svgStyle(); ASSERT(svgStyle->hasMarkers()); SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this); if (!resources) return FloatRect(); RenderSVGResourceMarker* markerStart = resources->markerStart(); RenderSVGResourceMarker* markerMid = resources->markerMid(); RenderSVGResourceMarker* markerEnd = resources->markerEnd(); if (!markerStart && !markerMid && !markerEnd) return FloatRect(); return m_markerLayoutInfo.calculateBoundaries(markerStart, markerMid, markerEnd, svgStyle->strokeWidth().value(svgElement), m_path); } void RenderPath::updateCachedBoundaries() { if (m_path.isEmpty()) { m_fillBoundingBox = FloatRect(); m_strokeAndMarkerBoundingBox = FloatRect(); m_repaintBoundingBox = FloatRect(); return; } // Cache _unclipped_ fill bounding box, used for calculations in resources m_fillBoundingBox = m_path.boundingRect(); // Cache _unclipped_ stroke bounding box, used for calculations in resources (includes marker boundaries) m_strokeAndMarkerBoundingBox = m_fillBoundingBox; const SVGRenderStyle* svgStyle = style()->svgStyle(); if (svgStyle->hasStroke()) { BoundingRectStrokeStyleApplier strokeStyle(this, style()); m_strokeAndMarkerBoundingBox.unite(m_path.strokeBoundingRect(&strokeStyle)); } if (svgStyle->hasMarkers()) { FloatRect markerBounds = calculateMarkerBoundsIfNeeded(); if (!markerBounds.isEmpty()) m_strokeAndMarkerBoundingBox.unite(markerBounds); } // Cache smallest possible repaint rectangle m_repaintBoundingBox = m_strokeAndMarkerBoundingBox; SVGRenderSupport::intersectRepaintRectWithResources(this, m_repaintBoundingBox); } } #endif // ENABLE(SVG)