turanszkij
87 lines
2.5 KiB
HLSL
87 lines
2.5 KiB
HLSL
#include "globals.hlsli"
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#include "ShaderInterop_Postprocess.h"
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#ifndef UPSAMPLE_FORMAT
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#define UPSAMPLE_FORMAT float4
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#endif // UPSAMPLE_FORMAT
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TEXTURE2D(input, UPSAMPLE_FORMAT, TEXSLOT_ONDEMAND0);
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// Note: this post process can be either a pixel shader or compute shader, depending on use case
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#ifdef USE_PIXELSHADER
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// Run this post process as pixel shader:
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float4 main(float4 pos : SV_Position, float2 uv : TEXCOORD) : SV_TARGET
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{
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#else
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// Run this post process as compute shader:
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RWTEXTURE2D(output, UPSAMPLE_FORMAT, 0);
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[numthreads(POSTPROCESS_BLOCKSIZE, POSTPROCESS_BLOCKSIZE, 1)]
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void main(uint3 DTid : SV_DispatchThreadID)
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{
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const float2 uv = (DTid.xy + 0.5f) * xPPResolution_rcp;
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#endif // USE_PIXELSHADER
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const float threshold = xPPParams0.x;
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const float2 lowres_texel_size = xPPParams0.yz;
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const float lowres_depthchain_mip = xPPParams0.w;
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const float2 uv00 = uv - 0.5f * lowres_texel_size;
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const float2 uv10 = uv00 + float2(lowres_texel_size.x, 0);
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const float2 uv01 = uv00 + float2(0, lowres_texel_size.y);
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const float2 uv11 = uv00 + lowres_texel_size;
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const float4 lineardepth_highres = texture_lineardepth.SampleLevel(sampler_point_clamp, uv, 0).xxxx;
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const float4 lineardepth_lowres = float4(
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texture_lineardepth.SampleLevel(sampler_point_clamp, uv00, lowres_depthchain_mip),
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texture_lineardepth.SampleLevel(sampler_point_clamp, uv10, lowres_depthchain_mip),
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texture_lineardepth.SampleLevel(sampler_point_clamp, uv01, lowres_depthchain_mip),
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texture_lineardepth.SampleLevel(sampler_point_clamp, uv11, lowres_depthchain_mip)
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);
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const float4 depth_diff = abs(lineardepth_highres - lineardepth_lowres) * g_xCamera_ZFarP;
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const float accum_diff = dot(depth_diff, float4(1, 1, 1, 1));
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UPSAMPLE_FORMAT color;
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[branch]
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if (accum_diff < threshold)
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{
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// small error, take bilinear sample:
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color = input.SampleLevel(sampler_linear_clamp, uv, 0);
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}
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else
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{
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// large error, find nearest sample to current depth:
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float min_depth_diff = depth_diff[0];
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float2 uv_nearest = uv00;
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if (depth_diff[1] < min_depth_diff)
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{
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uv_nearest = uv10;
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min_depth_diff = depth_diff[1];
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}
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if (depth_diff[2] < min_depth_diff)
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{
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uv_nearest = uv01;
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min_depth_diff = depth_diff[2];
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}
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if (depth_diff[3] < min_depth_diff)
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{
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uv_nearest = uv11;
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min_depth_diff = depth_diff[3];
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}
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color = input.SampleLevel(sampler_point_clamp, uv_nearest, 0);
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}
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#ifdef USE_PIXELSHADER
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return color;
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#else
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output[DTid.xy] = color;
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#endif // USE_PIXELSHADER
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}
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