xfy
a7490c0c2f
Adds CompositeMaterial + composite.wgsl: combines the HDR scene with the bloom pyramid output, applies ACES (Narkowicz) tone mapping, and writes LDR to the window. Removes UpscaleMaterial + upscale.wgsl. mirror_params now updates composite (bloom_strength, exposure) and brightpass (threshold) uniforms each frame. resize_offscreen rebuilds the full bloom pyramid targets on window resize.
34 lines
1.1 KiB
WebGPU Shading Language
34 lines
1.1 KiB
WebGPU Shading Language
#import bevy_sprite::mesh2d_vertex_output::VertexOutput
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struct CompositeUniform {
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bloom_strength: f32,
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exposure: f32,
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_pad0: f32,
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_pad1: f32,
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};
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@group(#{MATERIAL_BIND_GROUP}) @binding(0) var<uniform> u: CompositeUniform;
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@group(#{MATERIAL_BIND_GROUP}) @binding(1) var scene_tex: texture_2d<f32>;
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@group(#{MATERIAL_BIND_GROUP}) @binding(2) var scene_samp: sampler;
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@group(#{MATERIAL_BIND_GROUP}) @binding(3) var bloom_tex: texture_2d<f32>;
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@group(#{MATERIAL_BIND_GROUP}) @binding(4) var bloom_samp: sampler;
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// ACES Narkowicz fit (5 ops, clamped to [0,1]).
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fn aces_tonemap(x: vec3<f32>) -> vec3<f32> {
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let a = 2.51;
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let b = 0.03;
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let c = 2.43;
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let d = 0.59;
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let e = 0.14;
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return clamp((x * (a * x + b)) / (x * (c * x + d) + e), vec3<f32>(0.0), vec3<f32>(1.0));
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}
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@fragment
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fn fragment(in: VertexOutput) -> @location(0) vec4<f32> {
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let hdr = textureSample(scene_tex, scene_samp, in.uv).rgb;
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let bloom = textureSample(bloom_tex, bloom_samp, in.uv).rgb;
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let combined = hdr + bloom * u.bloom_strength;
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let mapped = aces_tonemap(combined * u.exposure);
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return vec4<f32>(mapped, 1.0);
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}
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