iris-aiandClaude Fable 5.1
f61e8936f1
`7c50a3e` renamed a length's `abs` component to `px` and took the WGSL `abs()` builtin in the rounded-rect distance with it, so every window failed shader validation on the first frame while `cargo test` stayed green. `naga` is reachable through `wgpu`, so a unit test now composes each shader file with the prelude the way the renderer does and parses and validates it; it reads the shader directory rather than naming primitives, so a new one is covered by adding its file. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
40 lines
1.1 KiB
WebGPU Shading Language
40 lines
1.1 KiB
WebGPU Shading Language
struct Rect {
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color: u32,
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radius: f32,
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thickness: f32,
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inner_radius: f32,
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}
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@group(1) @binding(0)
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var<storage> rects: array<Rect>;
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@fragment
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fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
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let rect = rects[in.idx];
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var color = unpack4x8unorm(rect.color);
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let edge = 0.5;
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let size = in.bot_right - in.top_left;
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let corner = size / 2.0;
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let center = in.top_left + corner;
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let pos = in.clip_position.xy;
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let dist = distance_from_rect(pos, center, corner, rect.radius);
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color.a *= 1.0 - smoothstep(-min(edge, rect.radius), edge, dist);
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if rect.thickness > 0.0 {
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let dist2 = distance_from_rect(pos, center, corner - rect.thickness, rect.inner_radius);
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color.a *= smoothstep(-min(edge, rect.inner_radius), edge, dist2);
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}
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return masked(in, color);
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}
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fn distance_from_rect(pixel_pos: vec2<f32>, rect_center: vec2<f32>, rect_corner: vec2<f32>, radius: f32) -> f32 {
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// vec from center to pixel
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let p = pixel_pos - rect_center;
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// vec from inner rect corner to pixel
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let q = abs(p) - (rect_corner - radius);
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return length(max(q, vec2(0.0))) - radius;
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}
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