RenderSVGShape.cpp [plain text]
#include "config.h"
#if ENABLE(SVG)
#include "RenderSVGShape.h"
#include "FloatPoint.h"
#include "FloatQuad.h"
#include "GraphicsContext.h"
#include "HitTestRequest.h"
#include "LayoutRepainter.h"
#include "PointerEventsHitRules.h"
#include "RenderSVGContainer.h"
#include "RenderSVGResourceMarker.h"
#include "RenderSVGResourceSolidColor.h"
#include "SVGPathData.h"
#include "SVGRenderingContext.h"
#include "SVGResources.h"
#include "SVGResourcesCache.h"
#include "SVGStyledTransformableElement.h"
#include "SVGTransformList.h"
#include "SVGURIReference.h"
#include "StrokeStyleApplier.h"
#include <wtf/MathExtras.h>
#include <wtf/StackStats.h>
namespace WebCore {
RenderSVGShape::RenderSVGShape(SVGStyledTransformableElement* node)
: RenderSVGModelObject(node)
, m_needsBoundariesUpdate(false) , m_needsShapeUpdate(true) , m_needsTransformUpdate(true) {
}
RenderSVGShape::~RenderSVGShape()
{
}
void RenderSVGShape::updateShapeFromElement()
{
m_path.clear();
m_path = adoptPtr(new Path);
ASSERT(RenderSVGShape::isEmpty());
SVGStyledTransformableElement* element = toSVGStyledTransformableElement(node());
updatePathFromGraphicsElement(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);
BoundingRectStrokeStyleApplier applier(this, style());
if (hasNonScalingStroke()) {
AffineTransform nonScalingTransform = nonScalingStrokeTransform();
Path* usePath = nonScalingStrokePath(m_path.get(), nonScalingTransform);
return usePath->strokeContains(&applier, nonScalingTransform.mapPoint(point));
}
return m_path->strokeContains(&applier, point);
}
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()
{
StackStats::LayoutCheckPoint layoutCheckPoint;
LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this) && selfNeedsLayout());
SVGStyledTransformableElement* element = toSVGStyledTransformableElement(node());
bool updateCachedBoundariesInParents = false;
if (m_needsShapeUpdate || m_needsBoundariesUpdate) {
updateShapeFromElement();
m_needsShapeUpdate = false;
updateRepaintBoundingBox();
m_needsBoundariesUpdate = false;
updateCachedBoundariesInParents = true;
}
if (m_needsTransformUpdate) {
m_localTransform = element->animatedLocalTransform();
m_needsTransformUpdate = false;
updateCachedBoundariesInParents = true;
}
if (everHadLayout() && selfNeedsLayout())
SVGResourcesCache::clientLayoutChanged(this);
if (updateCachedBoundariesInParents)
RenderSVGModelObject::setNeedsBoundariesUpdate();
repainter.repaintAfterLayout();
setNeedsLayout(false);
}
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
{
SVGStyledTransformableElement* element = toSVGStyledTransformableElement(node());
return element->getScreenCTM(SVGLocatable::DisallowStyleUpdate);
}
bool RenderSVGShape::shouldGenerateMarkerPositions() const
{
if (!style()->svgStyle()->hasMarkers())
return false;
SVGStyledTransformableElement* element = toSVGStyledTransformableElement(node());
if (!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::fillAndStrokeShape(GraphicsContext* context)
{
RenderStyle* style = this->style();
fillShape(style, context);
if (!style->svgStyle()->hasVisibleStroke())
return;
GraphicsContextStateSaver stateSaver(*context, false);
if (hasNonScalingStroke()) {
AffineTransform nonScalingTransform = nonScalingStrokeTransform();
if (!setupNonScalingStrokeContext(nonScalingTransform, stateSaver))
return;
}
strokeShape(style, context);
}
void RenderSVGShape::paint(PaintInfo& paintInfo, const LayoutPoint&)
{
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);
fillAndStrokeShape(childPaintInfo.context);
if (!m_markerPositions.isEmpty())
drawMarkers(childPaintInfo);
}
}
if (drawsOutline)
paintOutline(childPaintInfo.context, IntRect(boundingBox));
}
}
void RenderSVGShape::addFocusRingRects(Vector<IntRect>& rects, const LayoutPoint&)
{
IntRect rect = enclosingIntRect(repaintRectInLocalCoordinates());
if (!rect.isEmpty())
rects.append(rect);
}
bool RenderSVGShape::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
{
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().fastBoundingRect();
}
FloatRect RenderSVGShape::calculateStrokeBoundingBox() const
{
ASSERT(m_path);
FloatRect strokeBoundingBox = m_fillBoundingBox;
const SVGRenderStyle* svgStyle = style()->svgStyle();
if (svgStyle->hasStroke()) {
BoundingRectStrokeStyleApplier strokeStyle(this, style());
if (hasNonScalingStroke()) {
AffineTransform nonScalingTransform = nonScalingStrokeTransform();
if (nonScalingTransform.isInvertible()) {
Path* usePath = nonScalingStrokePath(m_path.get(), nonScalingTransform);
FloatRect strokeBoundingRect = usePath->strokeBoundingRect(&strokeStyle);
strokeBoundingRect = nonScalingTransform.inverse().mapRect(strokeBoundingRect);
strokeBoundingBox.unite(strokeBoundingRect);
}
} else
strokeBoundingBox.unite(path().strokeBoundingRect(&strokeStyle));
}
if (!m_markerPositions.isEmpty())
strokeBoundingBox.unite(markerRect(strokeWidth()));
return strokeBoundingBox;
}
void RenderSVGShape::updateRepaintBoundingBox()
{
m_repaintBoundingBoxExcludingShadow = strokeBoundingBox();
SVGRenderSupport::intersectRepaintRectWithResources(this, m_repaintBoundingBoxExcludingShadow);
m_repaintBoundingBox = m_repaintBoundingBoxExcludingShadow;
SVGRenderSupport::intersectRepaintRectWithShadows(this, m_repaintBoundingBox);
}
float RenderSVGShape::strokeWidth() const
{
SVGElement* svgElement = toSVGElement(node());
SVGLengthContext lengthContext(svgElement);
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();
}
}
#endif // ENABLE(SVG)