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31 lines
1.0 KiB
HLSL
31 lines
1.0 KiB
HLSL
#ifndef GBUFFER_SSAO_HLSLI
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#define GBUFFER_SSAO_HLSLI
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Texture2D<float4> g_SSAO : register(t5);
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float4 R8G8B8A8_UNORM_to_FLOAT4( uint packedInput )
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{
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float4 unpackedOutput;
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unpackedOutput.x = (float)( packedInput & 0x000000ff ) / 255;
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unpackedOutput.y = (float)( ( ( packedInput >> 8 ) & 0x000000ff ) ) / 255;
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unpackedOutput.z = (float)( ( ( packedInput >> 16 ) & 0x000000ff ) ) / 255;
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unpackedOutput.w = (float)( packedInput >> 24 ) / 255;
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return unpackedOutput;
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}
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void DecodeVisibilityBentNormal( const uint packedValue, out float visibility, out float3 bentNormal )
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{
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float4 decoded = R8G8B8A8_UNORM_to_FLOAT4( packedValue );
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bentNormal = decoded.xyz * 2.0.xxx - 1.0.xxx; // could normalize - don't want to since it's done so many times, better to do it at the final step only
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visibility = decoded.w;
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}
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float4 GetBentNormal(in uint2 pixel_position) {
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float4 bent_normal = g_SSAO[pixel_position];
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bent_normal.xyz = 2. * bent_normal.xyz - 1.;
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bent_normal.z *= -1.;
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return bent_normal;
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}
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#endif
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