forked from 1b-agent/opencadstudio-upstream
Hakan SevenandClaude Opus 5.5
80372abf2c
Only the wire shaders read transparency_enable; hatch (solid, gradient and pattern), text and 3D/fill-triangle fragments always drew the entity's alpha, so turning Show Transparency off left them see-through. Fixes #1529 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
77 lines
2.4 KiB
WebGPU Shading Language
77 lines
2.4 KiB
WebGPU Shading Language
struct Uniforms {
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viewport_size: vec2<f32>,
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world_per_pixel: f32,
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lwdisplay_enable: f32,
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flat_shade: f32,
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transparency_enable: f32,
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_pad: vec2<f32>,
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view_rot: mat4x4<f32>,
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eye_high: vec3<f32>,
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_pad_eh: f32,
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eye_low: vec3<f32>,
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_pad_el: f32,
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}
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@group(0) @binding(0) var<uniform> u: Uniforms;
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@group(1) @binding(0) var atlas_tex: texture_2d<f32>;
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@group(1) @binding(1) var atlas_samp: sampler;
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struct VertIn {
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@location(0) pos: vec3<f32>,
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@location(1) pos_low: vec3<f32>,
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@location(2) uv: vec2<f32>,
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@location(3) color: vec4<f32>,
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@location(4) source_depth: f32,
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@location(5) translation: vec3<f32>,
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@location(6) translation_low: vec3<f32>,
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@location(7) instance_depth: f32,
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}
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struct VertOut {
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@builtin(position) clip_pos: vec4<f32>,
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@location(0) uv: vec2<f32>,
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@location(1) color: vec4<f32>,
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}
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@vertex
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fn vs_main(v: VertIn) -> VertOut {
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var out: VertOut;
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let rel = (v.pos + v.translation - u.eye_high)
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+ (v.pos_low + v.translation_low - u.eye_low);
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out.clip_pos = u.view_rot * vec4<f32>(rel, 1.0);
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out.clip_pos = apply_draw_order(out.clip_pos, v.source_depth + v.instance_depth);
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out.uv = v.uv;
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out.color = v.color;
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return out;
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}
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@fragment
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fn fs_main(in: VertOut) -> @location(0) vec4<f32> {
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let uv_dx = dpdx(in.uv);
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let uv_dy = dpdy(in.uv);
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let dims = vec2<f32>(textureDimensions(atlas_tex));
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let footprint = max(length(uv_dx * dims), length(uv_dy * dims));
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let sd_center = textureSampleLevel(atlas_tex, atlas_samp, in.uv, 0.0).r;
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let aa = max(fwidth(sd_center), 1e-4);
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var alpha = smoothstep(0.5 - aa, 0.5 + aa, sd_center);
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if footprint > 1.0 {
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// Average coverage over the pixel footprint so thin strokes survive minification.
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let samples = select(4, 2, footprint <= 4.0);
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var sum = 0.0;
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for (var y = 0; y < samples; y += 1) {
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for (var x = 0; x < samples; x += 1) {
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let offset = (vec2<f32>(f32(x), f32(y)) + 0.5) / f32(samples) - 0.5;
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let sd = textureSampleLevel(
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atlas_tex, atlas_samp, in.uv + uv_dx * offset.x + uv_dy * offset.y, 0.0
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).r;
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sum += smoothstep(0.5 - aa, 0.5 + aa, sd);
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}
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}
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alpha = sum / f32(samples * samples);
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}
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if alpha <= 0.0 {
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discard;
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}
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return vec4<f32>(in.color.rgb, select(1.0, in.color.a, u.transparency_enable > 0.5) * alpha);
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}
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