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Merge pull request #8545 from penpot/superalex-fix-non-uniform-stroke-scaling-path-shapes-wasm

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🐛 Fix non-uniform stroke scaling on path shapes in WASM renderer
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Elena Torró 2026-03-09 16:23:50 +01:00 committed by GitHub
commit 6c20bfbc9b
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1 changed files with 15 additions and 4 deletions
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19
render-wasm/src/render/strokes.rs
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@ -164,16 +164,25 @@ fn draw_stroke_on_path(
blur: Option<&ImageFilter>, blur: Option<&ImageFilter>,
antialias: bool, antialias: bool,
) { ) {
let skia_path = path
.to_skia_path()
.make_transform(path_transform.unwrap_or(&Matrix::default()));
let is_open = path.is_open(); let is_open = path.is_open();
let mut draw_paint = paint.clone(); let mut draw_paint = paint.clone();
let filter = compose_filters(blur, shadow); let filter = compose_filters(blur, shadow);
draw_paint.set_image_filter(filter); draw_paint.set_image_filter(filter);
// Move path_transform from the path geometry to the canvas so the
// stroke width is not distorted by non-uniform shape scaling.
// The path coordinates are already in world space, so we draw the
// raw path on a canvas where the shape transform has been undone:
// canvas * path_transform = View × parents (no shape scale/rotation)
// This matches the SVG renderer, which bakes the transform into path
// coordinates and never sets a transform attribute on the element.
let save_count = canvas.save();
if let Some(pt) = path_transform {
canvas.concat(pt);
}
let skia_path = path.to_skia_path();
match stroke.render_kind(is_open) { match stroke.render_kind(is_open) {
StrokeKind::Inner => { StrokeKind::Inner => {
draw_inner_stroke_path(canvas, &skia_path, &draw_paint, blur, antialias); draw_inner_stroke_path(canvas, &skia_path, &draw_paint, blur, antialias);
@ -187,6 +196,8 @@ fn draw_stroke_on_path(
} }
handle_stroke_caps(&skia_path, stroke, canvas, is_open, paint, blur, antialias); handle_stroke_caps(&skia_path, stroke, canvas, is_open, paint, blur, antialias);
canvas.restore_to_count(save_count);
} }
fn handle_stroke_cap( fn handle_stroke_cap(