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loaders svg: prevent composition setting if the result shape is invalid.

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Current loader could return invalid shapes -default, from _appendShape()-
by a certain interpretation result,

Though it's a wrong or exception case, we can prevent worse case by avoiding it.
This commit is contained in:
Hermet Park 2021-04-09 15:57:32 +09:00 • committed by Hermet Park
parent e1eb98af79
commit 903df3da6a
1 changed files with 26 additions and 9 deletions
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35
src/loaders/svg/tvgSvgSceneBuilder.cpp
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@ -200,13 +200,20 @@ static unique_ptr<RadialGradient> _applyRadialGradientProperty(SvgStyleGradient*
}
static void _appendChildShape(SvgNode* node, Shape* shape, float vx, float vy, float vw, float vh)
static bool _appendChildShape(SvgNode* node, Shape* shape, float vx, float vy, float vw, float vh)
{
_appendShape(node, shape, vx, vy, vw, vh);
auto valid = false;
if (_appendShape(node, shape, vx, vy, vw, vh)) valid = true;
if (node->child.count > 0) {
auto child = node->child.data;
for (uint32_t i = 0; i < node->child.count; ++i, ++child) _appendChildShape(*child, shape, vx, vy, vw, vh);
for (uint32_t i = 0; i < node->child.count; ++i, ++child) {
if (_appendChildShape(*child, shape, vx, vy, vw, vh)) valid = true;
}
}
return valid;
}
@ -275,9 +282,14 @@ static void _applyProperty(SvgNode* node, Shape* vg, float vx, float vy, float v
if (compNode->child.count > 0) {
auto comp = Shape::gen();
auto child = compNode->child.data;
for (uint32_t i = 0; i < compNode->child.count; ++i, ++child) _appendChildShape(*child, comp.get(), vx, vy, vw, vh);
if (style->comp.method == CompositeMethod::ClipPath) comp->fill(0, 0, 0, 255);
vg->composite(move(comp), style->comp.method);
auto valid = false; //Composite only when valid shapes are existed
for (uint32_t i = 0; i < compNode->child.count; ++i, ++child) {
if (_appendChildShape(*child, comp.get(), vx, vy, vw, vh)) valid = true;
}
if (valid) {
if (style->comp.method == CompositeMethod::ClipPath) comp->fill(0, 0, 0, 255);
vg->composite(move(comp), style->comp.method);
}
}
}
}
@ -371,9 +383,14 @@ static unique_ptr<Scene> _sceneBuildHelper(const SvgNode* node, float vx, float
if (compNode->child.count > 0) {
auto comp = Shape::gen();
auto child = compNode->child.data;
for (uint32_t i = 0; i < compNode->child.count; ++i, ++child) _appendChildShape(*child, comp.get(), vx, vy, vw, vh);
if (node->style->comp.method == CompositeMethod::ClipPath) comp->fill(0, 0, 0, 255);
scene->composite(move(comp), node->style->comp.method);
auto valid = false; //Composite only when valid shapes are existed
for (uint32_t i = 0; i < compNode->child.count; ++i, ++child) {
if (_appendChildShape(*child, comp.get(), vx, vy, vw, vh)) valid = true;
}
if (valid) {
if (node->style->comp.method == CompositeMethod::ClipPath) comp->fill(0, 0, 0, 255);
scene->composite(move(comp), node->style->comp.method);
}
}
}
scene->opacity(node->style->opacity);