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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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32
shaders/wgsl/resurrectionPass.wgsl
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@@ -13,10 +13,10 @@
[[group(0), binding(2)]] var linearSampler : sampler;
[[group(0), binding(3)]] var tex : texture_2d<f32>;
[[group(0), binding(4)]] var bloomTex : texture_2d<f32>;
[[group(0), binding(5)]] 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;
@@ -55,36 +55,36 @@ fn hslToRgb(h : f32, s : f32, l : f32) -> vec3<f32> {
);
}
[[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(compute), workgroup_size(32, 1, 1)]] fn computeMain(input : ComputeInput) {
[[stage(fragment)]] fn fragMain(input : VertOutput) -> [[location(0)]] vec4<f32> {
// Resolve the invocation ID to a single cell
var coord = vec2<i32>(input.id.xy);
var screenSize = textureDimensions(tex);
var uv = input.uv;
uv.y = 1.0 - uv.y;
if (coord.x >= screenSize.x) {
return;
}
var uv = vec2<f32>(coord) / vec2<f32>(screenSize);
// Mix the texture and bloom based on distance from center,
// to approximate a lens blur
var brightness = mix(
textureSample( tex, linearSampler, uv ).rgb,
textureSample( bloomTex, linearSampler, uv ).rgb,
(0.7 - length(input.uv - 0.5))
textureSampleLevel( tex, linearSampler, uv, 0.0 ).rgb,
textureSampleLevel( bloomTex, linearSampler, uv, 0.0 ).rgb,
(0.7 - length(uv - 0.5))
) * 1.25;
// Dither: subtract a random value from the brightness
brightness = brightness - randomFloat( uv + vec2<f32>(time.seconds) ) * config.ditherMagnitude;
// Calculate a hue based on distance from center
var hue = 0.35 + (length(input.uv - vec2<f32>(0.5, 1.0)) * -0.4 + 0.2);
var hue = 0.35 + (length(uv - vec2<f32>(0.5, 1.0)) * -0.4 + 0.2);
// Convert HSL to RGB
var rgb = hslToRgb(hue, 0.8, max(0., brightness.r)) * vec3<f32>(0.8, 1.0, 0.7);
// Calculate a separate RGB for upward-flowing glyphs
var resurrectionRGB = hslToRgb(0.13, 1.0, max(0., brightness.g) * 0.9);
return vec4<f32>(rgb + resurrectionRGB + config.backgroundColor, 1.0);
textureStore(outputTex, coord, vec4<f32>(rgb + resurrectionRGB + config.backgroundColor, 1.0));
}