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Fix the chromatic aberration sampling (#1254)

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This commit is contained in:
Stanislav Denisov
2025-10-26 14:11:27 +01:00
committed by GitHub
parent 28f0330f97
commit 88a9aab75a
1 changed files with 9 additions and 7 deletions
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WickedEngine/shaders/chromatic_aberrationCS.hlsl
+9 -7
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@@ -13,17 +13,19 @@ void main(uint3 DTid : SV_DispatchThreadID)
const float2 uv = (DTid.xy + 0.5f) * postprocess.resolution_rcp;
const float amount = postprocess.params0.x;
const float2 distortion = (uv - 0.5f) * amount * postprocess.resolution_rcp;
float2 border = 0.5f * amount * postprocess.resolution_rcp;
border = min(border, float2(0.49f, 0.49f));
const float2 uv_base = lerp(border, 1.0f - border, uv);
const float2 uv_R = uv + float2(1, 1) * distortion;
const float2 uv_G = uv + float2(0, 0) * distortion;
const float2 uv_B = uv - float2(1, 1) * distortion;
const float2 distortion = (uv_base - 0.5f) * amount * postprocess.resolution_rcp;
const float2 uv_R = uv_base + float2(1, 1) * distortion;
const float2 uv_G = uv_base; // green stays at the base
const float2 uv_B = uv_base - float2(1, 1) * distortion;
const float R = input.SampleLevel(sampler_linear_clamp, uv_R, 0).r;
const float G = input.SampleLevel(sampler_linear_clamp, uv_G, 0).g;
const float B = input.SampleLevel(sampler_linear_clamp, uv_B, 0).b;
const float4 color = float4(R, G, B, 1);
output[DTid.xy] = color;
output[DTid.xy] = float4(R, G, B, 1);
}