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lottie: fix transformations in text range selector

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Since the translate API was used while text updating,
the subsequent range selector transformations gets overwritten
when updating the shape (scale and rotate, adding another
translation will persist). This caused unexpected results.
Fixed by using the transform API when additional transformations
are needed - also fixes applying more than one range selector.
This commit is contained in:
Mira Grudzinska 2024-10-21 21:36:23 +07:00 • committed by Hermet Park
parent 1d78835609
commit d9be58d4b7
2 changed files with 34 additions and 27 deletions
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25
src/loaders/lottie/tvgLottieBuilder.cpp
View file

@ -1060,6 +1060,11 @@ void LottieBuilder::updateText(LottieLayer* layer, float frameNo)
shape->strokeFill(doc.stroke.color.rgb[0], doc.stroke.color.rgb[1], doc.stroke.color.rgb[2]);
}
if (!text->ranges.empty()) {
Point scaling = {1.0f, 1.0f};
auto rotation = 0.0f;
auto translation = cursor;
//text range process
for (auto s = text->ranges.begin(); s < text->ranges.end(); ++s) {
float start, end;
@ -1071,21 +1076,16 @@ void LottieBuilder::updateText(LottieLayer* layer, float frameNo)
else if ((*s)->based == LottieTextRange::Based::Lines) basedIdx = line;
if (basedIdx < start || basedIdx >= end) continue;
auto& matrix = shape->transform();
translation = translation + (*s)->style.position(frameNo);
scaling = scaling * (*s)->style.scale(frameNo) * 0.01f;
rotation += (*s)->style.rotation(frameNo);
shape->opacity((*s)->style.opacity(frameNo));
auto color = (*s)->style.fillColor(frameNo);
shape->fill(color.rgb[0], color.rgb[1], color.rgb[2], (*s)->style.fillOpacity(frameNo));
rotate(&matrix, (*s)->style.rotation(frameNo));
auto glyphScale = (*s)->style.scale(frameNo) * 0.01f;
tvg::scale(&matrix, glyphScale.x, glyphScale.y);
auto position = (*s)->style.position(frameNo);
translate(&matrix, position.x, position.y);
if (doc.stroke.render) {
auto strokeColor = (*s)->style.strokeColor(frameNo);
shape->strokeWidth((*s)->style.strokeWidth(frameNo) / scale);
@ -1096,6 +1096,13 @@ void LottieBuilder::updateText(LottieLayer* layer, float frameNo)
auto spacing = (*s)->style.lineSpacing(frameNo);
if (spacing > lineSpacing) lineSpacing = spacing;
}
auto& matrix = shape->transform();
identity(&matrix);
translate(&matrix, translation.x, translation.y);
tvg::scale(&matrix, scaling.x, scaling.y);
rotate(&matrix, rotation);
shape->transform(matrix);
}
scene->push(cast(shape));

2
src/renderer/tvgPaint.h
View file

@ -107,7 +107,7 @@ namespace tvg
bool transform(const Matrix& m)
{
tr.m = m;
if (&tr.m != &m) tr.m = m;
tr.overriding = true;
renderFlag |= RenderUpdateFlag::Transform;