FloatRect RenderSVGResourceClipper::resourceBoundingBox(const FloatRect& objectBoundingBox) const
{
FloatRect clipRect;
for (Node* childNode = node()->firstChild(); childNode; childNode = childNode->nextSibling()) {
if (!childNode->isSVGElement() || !static_cast<SVGElement*>(childNode)->isStyledTransformable())
continue;
SVGStyledTransformableElement* styled = static_cast<SVGStyledTransformableElement*>(childNode);
RenderStyle* style = styled->renderer() ? styled->renderer()->style() : 0;
if (!style || style->display() == NONE)
continue;
clipRect.unite(styled->renderer()->objectBoundingBox());
}
if (clipRect.isEmpty())
return FloatRect();
if (static_cast<SVGClipPathElement*>(node())->clipPathUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
AffineTransform obbTransform;
obbTransform.translate(objectBoundingBox.x(), objectBoundingBox.y());
obbTransform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
return obbTransform.mapRect(clipRect);
}
return clipRect;
}
bool RenderSVGResourceClipper::applyResource(RenderObject* object, GraphicsContext* context)
{
ASSERT(object);
ASSERT(context);
m_clipper.add(object);
context->beginPath();
AffineTransform obbTransform;
FloatRect objectBoundingBox = object->objectBoundingBox();
bool bbox = static_cast<SVGClipPathElement*>(node())->clipPathUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX;
if (bbox) {
obbTransform.translate(objectBoundingBox.x(), objectBoundingBox.y());
obbTransform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
}
bool hasClipPath = false;
WindRule clipRule = RULE_EVENODD;
for (Node* childNode = node()->firstChild(); childNode; childNode = childNode->nextSibling()) {
if (!childNode->isSVGElement() || !static_cast<SVGElement*>(childNode)->isStyledTransformable())
continue;
SVGStyledTransformableElement* styled = static_cast<SVGStyledTransformableElement*>(childNode);
RenderStyle* style = styled->renderer() ? styled->renderer()->style() : 0;
if (!style || style->display() == NONE)
continue;
Path pathData = styled->toClipPath();
if (pathData.isEmpty())
continue;
if (bbox)
pathData.transform(obbTransform);
hasClipPath = true;
context->addPath(pathData);
clipRule = style->svgStyle()->clipRule();
}
if (!hasClipPath) {
Path clipPath;
clipPath.addRect(FloatRect());
context->addPath(clipPath);
}
// FIXME!
// We don't currently allow for heterogenous clip rules.
// we would have to detect such, draw to a mask, and then clip
// to that mask
context->clipPath(clipRule);
return true;
}