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Add check for division-by-zero in path_coarse_full

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The potential division by zero in this line led to visible visual
artifacts when running against WebGPU in Chrome.
This commit is contained in:
Arman Uguray 2023-04-23 16:05:08 -07:00
parent 7526d1ca26
commit bc903d1c3b
1 changed files with 1 additions and 1 deletions
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2
shader/path_coarse_full.wgsl
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@ -60,7 +60,7 @@ fn estimate_subdiv(p0: vec2<f32>, p1: vec2<f32>, p2: vec2<f32>, sqrt_tol: f32) -
let d12 = p2 - p1;
let dd = d01 - d12;
let cross = (p2.x - p0.x) * dd.y - (p2.y - p0.y) * dd.x;
let cross_inv = 1.0 / cross;
let cross_inv = select(1.0 / cross, 1.0e9, abs(cross) < 1.0e-9);
let x0 = dot(d01, dd) * cross_inv;
let x2 = dot(d12, dd) * cross_inv;
let scale = abs(cross / (length(dd) * (x2 - x0)));