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svg: fixed broken clip regression bugs

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introduced by 8492a63

https://github.com/thorvg/thorvg/issues/3083
https://github.com/thorvg/thorvg/issues/3082
This commit is contained in:
Hermet Park 2024-12-30 12:53:55 +09:00 • committed by Hermet Park
parent 5ea1db128e
commit 7e810ce54d
1 changed files with 34 additions and 24 deletions
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58
src/loaders/svg/tvgSvgSceneBuilder.cpp
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@ -184,8 +184,8 @@ static bool _appendClipChild(SvgLoaderData& loaderData, SvgNode* node, Shape* sh
{
//The SVG standard allows only for 'use' nodes that point directly to a basic shape.
if (node->type == SvgNodeType::Use) {
if (node->child.count != 1) return false;
auto child = *(node->child.data);
Matrix finalTransform = {1, 0, 0, 0, 1, 0, 0, 0, 1};
if (node->transform) finalTransform = *node->transform;
if (node->node.use.x != 0.0f || node->node.use.y != 0.0f) {
@ -217,11 +217,32 @@ static Matrix _compositionTransform(Paint* paint, const SvgNode* node, const Svg
return m;
}
static void _applyClip(SvgLoaderData& loaderData, Paint* paint, const SvgNode* node, const SvgNode* clipNode, const Box& vBox, const string& svgPath)
{
node->style->clipPath.applying = true;
auto clipper = Shape::gen();
auto child = clipNode->child.data;
auto valid = false; //Composite only when valid shapes exist
for (uint32_t i = 0; i < clipNode->child.count; ++i, ++child) {
if (_appendClipChild(loaderData, *child, clipper, vBox, svgPath)) valid = true;
}
if (valid) {
Matrix finalTransform = _compositionTransform(paint, node, clipNode, SvgNodeType::ClipPath);
clipper->transform(finalTransform);
paint->clip(clipper);
} else {
delete(clipper);
}
node->style->clipPath.applying = false;
}
static Paint* _applyComposition(SvgLoaderData& loaderData, Paint* paint, const SvgNode* node, const Box& vBox, const string& svgPath)
{
/* Do not drop in Circular Dependency for ClipPath.
Composition can be applied recursively if its children nodes have composition target to this one. */
if (node->style->clipPath.applying || node->style->mask.applying) {
TVGLOG("SVG", "Multiple composition tried! Check out circular dependency?");
return paint;
@ -237,25 +258,7 @@ static Paint* _applyComposition(SvgLoaderData& loaderData, Paint* paint, const S
auto scene = Scene::gen();
scene->push(paint);
if (validClip) {
node->style->clipPath.applying = true;
auto clipper = Shape::gen();
auto child = clipNode->child.data;
auto valid = false; //Composite only when valid shapes exist
for (uint32_t i = 0; i < clipNode->child.count; ++i, ++child) {
if (_appendClipChild(loaderData, *child, clipper, vBox, svgPath)) valid = true;
}
if (valid) {
Matrix finalTransform = _compositionTransform(paint, node, clipNode, SvgNodeType::ClipPath);
clipper->transform(finalTransform);
scene->clip(clipper);
}
node->style->clipPath.applying = false;
}
if (validClip) _applyClip(loaderData, scene, node, clipNode, vBox, svgPath);
/* Mask */
if (validMask) {
@ -412,14 +415,14 @@ static Paint* _shapeBuildHelper(SvgLoaderData& loaderData, SvgNode* node, const
static bool _appendClipShape(SvgLoaderData& loaderData, SvgNode* node, Shape* shape, const Box& vBox, const string& svgPath, const Matrix* transform)
{
auto currentPtsCnt = shape->pathCoords(nullptr);
if (!_recognizeShape(node, shape)) return false;
//The 'transform' matrix has higher priority than the node->transform, since it already contains it
auto m = transform ? transform : (node->transform ? node->transform : nullptr);
uint32_t currentPtsCnt = 0;
if (m) {
currentPtsCnt = shape->pathCoords(nullptr);
const Point *pts = nullptr;
auto ptsCnt = shape->pathCoords(&pts);
auto p = const_cast<Point*>(pts) + currentPtsCnt;
@ -429,6 +432,13 @@ static bool _appendClipShape(SvgLoaderData& loaderData, SvgNode* node, Shape* sh
}
}
//Apply Clip Chaining
auto clipNode = node->style->clipPath.node;
if (clipNode && clipNode->child.count > 0) {
if (node->style->clipPath.applying) TVGLOG("SVG", "Multiple composition tried! Check out circular dependency?");
else _applyClip(loaderData, shape, node, clipNode, vBox, svgPath);
}
return true;
}