SDL/VisualC-GDK/shaders/D3D12_PixelShader_YUV_BT709...

46 lines
1.5 KiB
HLSL

Texture2D theTextureY : register(t0);
Texture2D theTextureU : register(t1);
Texture2D theTextureV : register(t2);
SamplerState theSampler : register(s0);
struct PixelShaderInput
{
float4 pos : SV_POSITION;
float2 tex : TEXCOORD0;
float4 color : COLOR0;
};
#define YUVRS \
"RootFlags ( ALLOW_INPUT_ASSEMBLER_INPUT_LAYOUT |" \
" DENY_DOMAIN_SHADER_ROOT_ACCESS |" \
" DENY_GEOMETRY_SHADER_ROOT_ACCESS |" \
" DENY_HULL_SHADER_ROOT_ACCESS )," \
"RootConstants(num32BitConstants=32, b0),"\
"DescriptorTable ( SRV(t0), visibility = SHADER_VISIBILITY_PIXEL ),"\
"DescriptorTable ( SRV(t1), visibility = SHADER_VISIBILITY_PIXEL ),"\
"DescriptorTable ( SRV(t2), visibility = SHADER_VISIBILITY_PIXEL ),"\
"DescriptorTable ( Sampler(s0), visibility = SHADER_VISIBILITY_PIXEL )"
[RootSignature(YUVRS)]
float4 main(PixelShaderInput input) : SV_TARGET
{
const float3 offset = {-0.0627451017, -0.501960814, -0.501960814};
const float3 Rcoeff = {1.1644, 0.0000, 1.7927};
const float3 Gcoeff = {1.1644, -0.2132, -0.5329};
const float3 Bcoeff = {1.1644, 2.1124, 0.0000};
float4 Output;
float3 yuv;
yuv.x = theTextureY.Sample(theSampler, input.tex).r;
yuv.y = theTextureU.Sample(theSampler, input.tex).r;
yuv.z = theTextureV.Sample(theSampler, input.tex).r;
yuv += offset;
Output.r = dot(yuv, Rcoeff);
Output.g = dot(yuv, Gcoeff);
Output.b = dot(yuv, Bcoeff);
Output.a = 1.0f;
return Output * input.color;
}