49 lines
1.8 KiB
HLSL
49 lines
1.8 KiB
HLSL
// Inputs:
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// - FXAA_QUALITY__PRESET
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// - FXAA_QUALITY__SUBPIX
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// - FXAA_QUALITY__EDGE_THRESHOLD
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// - FXAA_QUALITY__EDGE_THRESHOLD_MIN
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// "use of potentially uninitialized variable" in FxaaPixelShader due to the
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// early exit with a `return` in the beginning of the function, caused by a bug
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// in FXC (the warning is common for early exiting in HLSL in general).
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#pragma warning(disable: 4000)
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cbuffer XeApplyGammaRampConstants : register(b0) {
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uint2 xe_fxaa_size;
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float2 xe_fxaa_size_inv;
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};
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RWTexture2D<unorm float4> xe_fxaa_dest : register(u0);
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Texture2D<float4> xe_fxaa_source : register(t0);
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SamplerState xe_sampler_linear_clamp : register(s0);
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#define FXAA_PC 1
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#define FXAA_HLSL_5 1
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#include "../../../../third_party/fxaa/FXAA3_11.h"
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[numthreads(16, 8, 1)]
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void main(uint3 xe_thread_id : SV_DispatchThreadID) {
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[branch] if (any(xe_thread_id.xy >= xe_fxaa_size)) {
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return;
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}
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FxaaTex fxaa_texture;
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fxaa_texture.smpl = xe_sampler_linear_clamp;
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fxaa_texture.tex = xe_fxaa_source;
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// Force alpha to 1 to simplify calculations, won't need it anymore anyway.
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xe_fxaa_dest[xe_thread_id.xy] =
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float4(
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FxaaPixelShader(
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(float2(xe_thread_id.xy) + 0.5) * xe_fxaa_size_inv,
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(float2(xe_thread_id.xy).xyxy + float2(0.0, 1.0).xxyy) *
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xe_fxaa_size_inv.xyxy,
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fxaa_texture, fxaa_texture, fxaa_texture, xe_fxaa_size_inv,
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float2(-0.5, 0.5).xxyy * xe_fxaa_size_inv.xyxy,
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float2(-2.0, 2.0).xxyy * xe_fxaa_size_inv.xyxy,
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float2(8.0, -4.0).xxyy * xe_fxaa_size_inv.xyxy,
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FXAA_QUALITY__SUBPIX, FXAA_QUALITY__EDGE_THRESHOLD,
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FXAA_QUALITY__EDGE_THRESHOLD_MIN, 8.0, 0.125, 0.05,
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float4(1.0, -1.0, 0.25, -0.25)).rgb,
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1.0);
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}
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