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 "SVGPathElement.h"
#include "SVGRenderingContext.h"
#include "SVGResources.h"
#include "SVGResourcesCache.h"
#include "SVGStyledTransformableElement.h"
#include "SVGSubpathData.h"
#include "SVGTransformList.h"
#include "SVGURIReference.h"
#include "StrokeStyleApplier.h"
#include <wtf/MathExtras.h>
namespace WebCore {
RenderSVGShape::RenderSVGShape(SVGStyledTransformableElement* node)
: RenderSVGModelObject(node)
, m_needsBoundariesUpdate(false) , m_needsShapeUpdate(true) , m_needsTransformUpdate(true) , m_fillFallback(false)
{
}
RenderSVGShape::~RenderSVGShape()
{
}
void RenderSVGShape::createShape()
{
ASSERT(!m_path);
m_path = adoptPtr(new Path);
ASSERT(isEmpty());
SVGPathElement* element = static_cast<SVGPathElement*>(node());
updatePathFromGraphicsElement(element, path());
processZeroLengthSubpaths();
}
bool RenderSVGShape::isEmpty() const
{
return m_path->isEmpty();
}
void RenderSVGShape::fillShape(GraphicsContext* context) const
{
context->fillPath(path());
}
FloatRect RenderSVGShape::objectBoundingBox() const
{
return m_path->fastBoundingRect();
}
void RenderSVGShape::strokeShape(GraphicsContext* context) const
{
if (style()->svgStyle()->hasVisibleStroke())
context->strokePath(path());
}
bool RenderSVGShape::shapeDependentStrokeContains(const FloatPoint& point) const
{
BoundingRectStrokeStyleApplier applier(this, style());
return m_path->strokeContains(&applier, point);
}
bool RenderSVGShape::shapeDependentFillContains(const FloatPoint& point, const WindRule fillRule) const
{
return m_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;
const SVGRenderStyle* svgStyle = style()->svgStyle();
for (size_t i = 0; i < m_zeroLengthLinecapLocations.size(); ++i) {
ASSERT(style()->svgStyle()->hasStroke());
float strokeWidth = this->strokeWidth();
if (style()->svgStyle()->capStyle() == SquareCap) {
if (zeroLengthSubpathRect(m_zeroLengthLinecapLocations[i], strokeWidth).contains(point))
return true;
} else {
ASSERT(style()->svgStyle()->capStyle() == RoundCap);
FloatPoint radiusVector(point.x() - m_zeroLengthLinecapLocations[i].x(), point.y() - m_zeroLengthLinecapLocations[i].y());
if (radiusVector.lengthSquared() < strokeWidth * strokeWidth * .25f)
return true;
}
}
if (!svgStyle->strokeDashArray().isEmpty() || svgStyle->strokeMiterLimit() != svgStyle->initialStrokeMiterLimit()
|| svgStyle->joinStyle() != svgStyle->initialJoinStyle() || svgStyle->capStyle() != svgStyle->initialCapStyle()) {
if (!m_path)
RenderSVGShape::createShape();
return RenderSVGShape::shapeDependentStrokeContains(point);
}
return shapeDependentStrokeContains(point);
}
void RenderSVGShape::layout()
{
LayoutRepainter repainter(*this, checkForRepaintDuringLayout() && selfNeedsLayout());
SVGStyledTransformableElement* element = static_cast<SVGStyledTransformableElement*>(node());
bool updateCachedBoundariesInParents = false;
bool needsShapeUpdate = m_needsShapeUpdate;
if (needsShapeUpdate || m_needsBoundariesUpdate) {
setIsPaintingFallback(false);
m_path.clear();
createShape();
m_needsShapeUpdate = false;
updateCachedBoundariesInParents = true;
}
if (m_needsTransformUpdate) {
m_localTransform = element->animatedLocalTransform();
m_needsTransformUpdate = false;
updateCachedBoundariesInParents = true;
}
if (everHadLayout() && selfNeedsLayout()) {
SVGResourcesCache::clientLayoutChanged(this);
m_markerLayoutInfo.clear();
}
if (needsShapeUpdate || m_needsBoundariesUpdate) {
updateCachedBoundaries();
m_needsBoundariesUpdate = false;
}
if (updateCachedBoundariesInParents)
RenderSVGModelObject::setNeedsBoundariesUpdate();
repainter.repaintAfterLayout();
setNeedsLayout(false);
}
bool RenderSVGShape::shouldStrokeZeroLengthSubpath() const
{
return style()->svgStyle()->hasStroke() && style()->svgStyle()->capStyle() != ButtCap;
}
FloatRect RenderSVGShape::zeroLengthSubpathRect(const FloatPoint& linecapPosition, float strokeWidth) const
{
return FloatRect(linecapPosition.x() - strokeWidth / 2, linecapPosition.y() - strokeWidth / 2, strokeWidth, strokeWidth);
}
Path* RenderSVGShape::zeroLengthLinecapPath(const FloatPoint& linecapPosition)
{
DEFINE_STATIC_LOCAL(Path, tempPath, ());
tempPath.clear();
float strokeWidth = this->strokeWidth();
if (style()->svgStyle()->capStyle() == SquareCap)
tempPath.addRect(zeroLengthSubpathRect(linecapPosition, strokeWidth));
else
tempPath.addEllipse(zeroLengthSubpathRect(linecapPosition, strokeWidth));
return &tempPath;
}
Path* RenderSVGShape::nonScalingStrokePath(const Path* path, const AffineTransform& strokeTransform)
{
DEFINE_STATIC_LOCAL(Path, tempPath, ());
tempPath = *path;
tempPath.transform(strokeTransform);
return &tempPath;
}
bool RenderSVGShape::setupNonScalingStrokeTransform(AffineTransform& strokeTransform, GraphicsContextStateSaver& stateSaver)
{
SVGStyledTransformableElement* element = static_cast<SVGStyledTransformableElement*>(node());
strokeTransform = element->getScreenCTM(SVGLocatable::DisallowStyleUpdate);
if (!strokeTransform.isInvertible())
return false;
stateSaver.save();
stateSaver.context()->concatCTM(strokeTransform.inverse());
return true;
}
void RenderSVGShape::fillShape(RenderStyle* style, GraphicsContext* context, Path* path, RenderSVGShape* shape)
{
Color fallbackColor;
if (RenderSVGResource* fillPaintingResource = RenderSVGResource::fillPaintingResource(this, style, fallbackColor)) {
if (fillPaintingResource->applyResource(this, style, context, ApplyToFillMode))
fillPaintingResource->postApplyResource(this, context, ApplyToFillMode, path, shape);
else if (fallbackColor.isValid()) {
RenderSVGResourceSolidColor* fallbackResource = RenderSVGResource::sharedSolidPaintingResource();
fallbackResource->setColor(fallbackColor);
if (fallbackResource->applyResource(this, style, context, ApplyToFillMode))
fallbackResource->postApplyResource(this, context, ApplyToFillMode, path, shape);
}
}
}
void RenderSVGShape::strokePath(RenderStyle* style, GraphicsContext* context, Path* path, RenderSVGResource* strokePaintingResource,
const Color& fallbackColor, bool nonScalingStroke, const AffineTransform& nonScalingStrokeTransform,
int applyMode)
{
if (!style->svgStyle()->hasVisibleStroke())
return;
Path* usePath = path;
if (nonScalingStroke) {
usePath = nonScalingStrokePath(path, nonScalingStrokeTransform);
}
if (strokePaintingResource->applyResource(this, style, context, applyMode)) {
strokePaintingResource->postApplyResource(this, context, applyMode, usePath, this);
return;
}
if (!fallbackColor.isValid())
return;
RenderSVGResourceSolidColor* fallbackResource = RenderSVGResource::sharedSolidPaintingResource();
fallbackResource->setColor(fallbackColor);
if (fallbackResource->applyResource(this, style, context, applyMode))
fallbackResource->postApplyResource(this, context, applyMode, usePath, this);
}
void RenderSVGShape::fillAndStrokePath(GraphicsContext* context)
{
RenderStyle* style = this->style();
fillShape(style, context, 0, this);
Color fallbackColor = Color();
RenderSVGResource* strokePaintingResource = RenderSVGResource::strokePaintingResource(this, style, fallbackColor);
if (!strokePaintingResource)
return;
GraphicsContextStateSaver stateSaver(*context, false);
AffineTransform nonScalingStrokeTransform;
bool nonScalingStroke = style->svgStyle()->vectorEffect() == VE_NON_SCALING_STROKE;
if (nonScalingStroke) {
if (!setupNonScalingStrokeTransform(nonScalingStrokeTransform, stateSaver))
return;
}
strokePath(style, context, m_path.get(), strokePaintingResource, fallbackColor, nonScalingStroke, nonScalingStrokeTransform, ApplyToStrokeMode);
for (size_t i = 0; i < m_zeroLengthLinecapLocations.size(); ++i) {
Path* usePath = zeroLengthLinecapPath(m_zeroLengthLinecapLocations[i]);
strokePath(style, context, usePath, strokePaintingResource, fallbackColor, nonScalingStroke, nonScalingStrokeTransform, ApplyToFillMode);
}
}
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);
fillAndStrokePath(childPaintInfo.context);
if (svgStyle->hasMarkers())
m_markerLayoutInfo.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;
}
FloatRect RenderSVGShape::calculateMarkerBoundsIfNeeded()
{
SVGElement* svgElement = static_cast<SVGElement*>(node());
ASSERT(svgElement && svgElement->document());
if (!svgElement->isStyled())
return FloatRect();
SVGStyledElement* styledElement = static_cast<SVGStyledElement*>(svgElement);
if (!styledElement->supportsMarkers())
return FloatRect();
ASSERT(style()->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, strokeWidth(), path());
}
void RenderSVGShape::updateCachedBoundaries()
{
if (isEmpty()) {
m_fillBoundingBox = FloatRect();
m_strokeAndMarkerBoundingBox = FloatRect();
m_repaintBoundingBox = FloatRect();
return;
}
m_fillBoundingBox = objectBoundingBox();
float strokeWidth = this->strokeWidth();
for (size_t i = 0; i < m_zeroLengthLinecapLocations.size(); ++i)
m_fillBoundingBox.unite(zeroLengthSubpathRect(m_zeroLengthLinecapLocations[i], strokeWidth));
m_strokeAndMarkerBoundingBox = m_fillBoundingBox;
if (hasPath())
inflateWithStrokeAndMarkerBounds();
m_repaintBoundingBox = strokeBoundingBox();
SVGRenderSupport::intersectRepaintRectWithResources(this, m_repaintBoundingBox);
}
float RenderSVGShape::strokeWidth() const
{
SVGElement* svgElement = static_cast<SVGElement*>(node());
SVGLengthContext lengthContext(svgElement);
return style()->svgStyle()->strokeWidth().value(lengthContext);
}
void RenderSVGShape::inflateWithStrokeAndMarkerBounds()
{
const SVGRenderStyle* svgStyle = style()->svgStyle();
FloatRect strokeRect;
if (svgStyle->hasStroke()) {
BoundingRectStrokeStyleApplier strokeStyle(this, style());
m_strokeAndMarkerBoundingBox.unite(path().strokeBoundingRect(&strokeStyle));
}
if (svgStyle->hasMarkers()) {
FloatRect markerBounds = calculateMarkerBoundsIfNeeded();
if (!markerBounds.isEmpty())
m_strokeAndMarkerBoundingBox.unite(markerBounds);
}
}
void RenderSVGShape::processZeroLengthSubpaths()
{
m_zeroLengthLinecapLocations.clear();
float strokeWidth = this->strokeWidth();
if (!strokeWidth || !shouldStrokeZeroLengthSubpath())
return;
ASSERT(m_path);
SVGSubpathData subpathData(m_zeroLengthLinecapLocations);
m_path->apply(&subpathData, SVGSubpathData::updateFromPathElement);
subpathData.pathIsDone();
}
}
#endif // ENABLE(SVG)