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All the post processing passes are now based on compute pipelines instead of render pipelines.

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Rezmason
2021-11-11 21:50:27 -08:00
parent 9ad655ca2e
commit db928bbe7a
13 changed files with 157 additions and 335 deletions
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29
shaders/wgsl/palettePass.wgsl
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@@ -18,10 +18,10 @@
[[group(0), binding(3)]] var linearSampler : sampler;
[[group(0), binding(4)]] var tex : texture_2d<f32>;
[[group(0), binding(5)]] var bloomTex : texture_2d<f32>;
[[group(0), binding(6)]] var outputTex : texture_storage_2d<rgba8unorm, write>;
struct VertOutput {
[[builtin(position)]] Position : vec4<f32>;
[[location(0)]] uv : vec2<f32>;
struct ComputeInput {
[[builtin(global_invocation_id)]] id : vec3<u32>;
};
let PI : f32 = 3.14159265359;
@@ -35,18 +35,20 @@ fn randomFloat( uv : vec2<f32> ) -> f32 {
return fract(sin(sn) * c);
}
[[stage(vertex)]] fn vertMain([[builtin(vertex_index)]] index : u32) -> VertOutput {
var uv = vec2<f32>(f32(index % 2u), f32((index + 1u) % 6u / 3u));
var position = vec4<f32>(uv * 2.0 - 1.0, 1.0, 1.0);
return VertOutput(position, uv);
}
[[stage(fragment)]] fn fragMain(input : VertOutput) -> [[location(0)]] vec4<f32> {
[[stage(compute), workgroup_size(32, 1, 1)]] fn computeMain(input : ComputeInput) {
var uv = input.uv;
uv.y = 1.0 - uv.y;
// Resolve the invocation ID to a single cell
var coord = vec2<i32>(input.id.xy);
var screenSize = textureDimensions(tex);
var brightnessRGB = textureSample( tex, linearSampler, uv ) + textureSample( bloomTex, linearSampler, uv );
if (coord.x >= screenSize.x) {
return;
}
var uv = vec2<f32>(coord) / vec2<f32>(screenSize);
var brightnessRGB = textureSampleLevel( tex, linearSampler, uv, 0.0 ) + textureSampleLevel( bloomTex, linearSampler, uv, 0.0 );
// Combine the texture and bloom
var brightness = brightnessRGB.r + brightnessRGB.g + brightnessRGB.b;
@@ -57,5 +59,6 @@ fn randomFloat( uv : vec2<f32> ) -> f32 {
var paletteIndex = clamp(i32(brightness * 512.0), 0, 511);
// Map the brightness to a position in the palette texture
return vec4<f32>(palette.colors[paletteIndex] + config.backgroundColor, 1.0);
textureStore(outputTex, coord, vec4<f32>(palette.colors[paletteIndex] + config.backgroundColor, 1.0));
}