46 lines
1.5 KiB
HLSL
46 lines
1.5 KiB
HLSL
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Texture2D theTextureY : register(t0);
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Texture2D theTextureU : register(t1);
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Texture2D theTextureV : register(t2);
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SamplerState theSampler : register(s0);
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struct PixelShaderInput
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{
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float4 pos : SV_POSITION;
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float2 tex : TEXCOORD0;
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float4 color : COLOR0;
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};
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#define YUVRS \
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"RootFlags ( ALLOW_INPUT_ASSEMBLER_INPUT_LAYOUT |" \
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" DENY_DOMAIN_SHADER_ROOT_ACCESS |" \
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" DENY_GEOMETRY_SHADER_ROOT_ACCESS |" \
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" DENY_HULL_SHADER_ROOT_ACCESS )," \
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"RootConstants(num32BitConstants=32, b0),"\
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"DescriptorTable ( SRV(t0), visibility = SHADER_VISIBILITY_PIXEL ),"\
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"DescriptorTable ( SRV(t1), visibility = SHADER_VISIBILITY_PIXEL ),"\
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"DescriptorTable ( SRV(t2), visibility = SHADER_VISIBILITY_PIXEL ),"\
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"DescriptorTable ( Sampler(s0), visibility = SHADER_VISIBILITY_PIXEL )"
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[RootSignature(YUVRS)]
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float4 main(PixelShaderInput input) : SV_TARGET
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{
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const float3 offset = {0.0, -0.501960814, -0.501960814};
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const float3 Rcoeff = {1.0000, 0.0000, 1.4020};
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const float3 Gcoeff = {1.0000, -0.3441, -0.7141};
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const float3 Bcoeff = {1.0000, 1.7720, 0.0000};
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float4 Output;
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float3 yuv;
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yuv.x = theTextureY.Sample(theSampler, input.tex).r;
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yuv.y = theTextureU.Sample(theSampler, input.tex).r;
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yuv.z = theTextureV.Sample(theSampler, input.tex).r;
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yuv += offset;
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Output.r = dot(yuv, Rcoeff);
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Output.g = dot(yuv, Gcoeff);
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Output.b = dot(yuv, Bcoeff);
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Output.a = 1.0f;
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return Output * input.color;
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}
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