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fix #219 (minimum stroke thickness)

This commit is contained in:
Sebastian Köln 2019-08-10 18:27:54 +03:00
parent f89ed900a3
commit 3d0e911c3e
1 changed files with 7 additions and 1 deletions
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8
canvas/src/lib.rs
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@ -168,7 +168,13 @@ impl CanvasRenderingContext2D {
let paint_id = self.scene.push_paint(&paint); let paint_id = self.scene.push_paint(&paint);
let mut stroke_style = self.current_state.resolve_stroke_style(); let mut stroke_style = self.current_state.resolve_stroke_style();
stroke_style.line_width = f32::max(stroke_style.line_width, HAIRLINE_STROKE_WIDTH);
// the smaller scale is relevant here, as we multiply by it and want to ensure it is always bigger than HAIRLINE_STROKE_WIDTH
let transform_scale = f32::min(self.current_state.transform.m11(), self.current_state.transform.m22());
// avoid the division in the normal case of sufficient thickness
if stroke_style.line_width * transform_scale < HAIRLINE_STROKE_WIDTH {
stroke_style.line_width = HAIRLINE_STROKE_WIDTH / transform_scale;
}
let mut outline = path.into_outline(); let mut outline = path.into_outline();
if !self.current_state.line_dash.is_empty() { if !self.current_state.line_dash.is_empty() {