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My friend recommended a much simpler blur that doesn't build any image pyramids. Unfortunately my work towards an implementation isn't very promising— it doesn't pack the same wollop as the WebGL version— but I can built my pyramids on top of it.

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Rezmason
2021-11-13 21:22:15 -08:00
parent cebd6877bb
commit 7eecace634
5 changed files with 97 additions and 136 deletions
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37
shaders/wgsl/blur1D.wgsl Normal file
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@@ -0,0 +1,37 @@
[[block]] struct Config {
bloomStrength : f32;
direction : vec2<f32>;
};
[[group(0), binding(0)]] var<uniform> config : Config;
[[group(0), binding(1)]] var nearestSampler : sampler;
[[group(0), binding(2)]] var tex : texture_2d<f32>;
[[group(0), binding(3)]] var outputTex : texture_storage_2d<rgba8unorm, write>;
struct ComputeInput {
[[builtin(global_invocation_id)]] id : vec3<u32>;
};
[[stage(compute), workgroup_size(32, 1, 1)]] fn computeMain(input : ComputeInput) {
var coord = vec2<i32>(input.id.xy);
var outputSize = textureDimensions(outputTex);
if (coord.x >= outputSize.x) {
return;
}
var uv = (vec2<f32>(coord) + 0.5) / vec2<f32>(outputSize);
var offset = config.direction / vec2<f32>(outputSize);
var sum = vec4<f32>(0.0);
sum = sum + textureSampleLevel( tex, nearestSampler, uv + offset * 3.0, 0.0 ) * 0.006;
sum = sum + textureSampleLevel( tex, nearestSampler, uv + offset * 2.0, 0.0 ) * 0.061;
sum = sum + textureSampleLevel( tex, nearestSampler, uv + offset * 1.0, 0.0 ) * 0.242;
sum = sum + textureSampleLevel( tex, nearestSampler, uv + offset * 0.0, 0.0 ) * 0.383;
sum = sum + textureSampleLevel( tex, nearestSampler, uv + offset * -1.0, 0.0 ) * 0.242;
sum = sum + textureSampleLevel( tex, nearestSampler, uv + offset * -2.0, 0.0 ) * 0.061;
sum = sum + textureSampleLevel( tex, nearestSampler, uv + offset * -3.0, 0.0 ) * 0.006;
textureStore(outputTex, coord, sum * config.bloomStrength);
}