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lottie: fix text stroke's 'of' property

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The text stroke's 'of' property determines whether
the stroke appears above (true) or below (false)
the fill.
Previously, it was incorrectly used to decide whether
the stroke would render.

@Issue: https://github.com/thorvg/thorvg/issues/3126
This commit is contained in:
Mira Grudzinska 2025-01-14 12:35:17 +01:00 • committed by Hermet Park
parent 8f98681ea7
commit 096b834771
3 changed files with 7 additions and 5 deletions
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8
src/loaders/lottie/tvgLottieBuilder.cpp
View file

@ -1092,10 +1092,11 @@ void LottieBuilder::updateText(LottieLayer* layer, float frameNo)
shape->translate(cursor.x - textGroupMatrix.e13, cursor.y - textGroupMatrix.e23);
shape->opacity(255);
if (doc.stroke.render) {
if (doc.stroke.width > 0.0f) {
shape->strokeJoin(StrokeJoin::Round);
shape->strokeWidth(doc.stroke.width / scale);
shape->strokeFill(doc.stroke.color.rgb[0], doc.stroke.color.rgb[1], doc.stroke.color.rgb[2]);
shape->order(doc.stroke.below);
}
auto needGroup = false;
@ -1137,8 +1138,8 @@ void LottieBuilder::updateText(LottieLayer* layer, float frameNo)
fillOpacity = (uint8_t)(fillOpacity - f * (fillOpacity - (*s)->style.fillOpacity(frameNo)));
shape->fill(color.rgb[0], color.rgb[1], color.rgb[2], fillOpacity);
if (doc.stroke.render) {
shape->strokeWidth(f * (*s)->style.strokeWidth(frameNo) / scale);
shape->strokeWidth(f * (*s)->style.strokeWidth(frameNo) / scale);
if (shape->strokeWidth() > 0.0f) {
auto rangeColor = (*s)->style.strokeColor(frameNo); //TODO: use flag to check whether it was really set
if (tvg::equal(f, 1.0f)) strokeColor = rangeColor;
else {
@ -1148,6 +1149,7 @@ void LottieBuilder::updateText(LottieLayer* layer, float frameNo)
}
strokeOpacity = (uint8_t)(strokeOpacity - f * (strokeOpacity - (*s)->style.strokeOpacity(frameNo)));
shape->strokeFill(strokeColor.rgb[0], strokeColor.rgb[1], strokeColor.rgb[2], strokeOpacity);
shape->order(doc.stroke.below);
}
cursor.x += f * (*s)->style.letterSpacing(frameNo);

2
src/loaders/lottie/tvgLottieData.h
View file

@ -62,7 +62,7 @@ struct TextDocument
struct {
RGB24 color;
float width;
bool render = false;
bool below = false;
} stroke;
char* name = nullptr;
float size;

2
src/loaders/lottie/tvgLottieParser.cpp
View file

@ -136,7 +136,7 @@ bool LottieParser::getValue(TextDocument& doc)
else if (KEY_AS("sz")) getValue(doc.bbox.size);
else if (KEY_AS("sc")) getValue(doc.stroke.color);
else if (KEY_AS("sw")) doc.stroke.width = getFloat();
else if (KEY_AS("of")) doc.stroke.render = getBool();
else if (KEY_AS("of")) doc.stroke.below = !getBool();
else skip();
}
return false;