float2   EyeToSourceUVScale;
float2   EyeToSourceUVOffset;

void main(in float2 Position    : POSITION,
          in float4 Color       : COLOR0,
          in float2 TexCoord0   : TEXCOORD0,
          in float2 TexCoord1   : TEXCOORD1,
          in float2 TexCoord2   : TEXCOORD2,
          out float4 oPosition  : SV_Position,          
          out float1 oColor     : COLOR,
          out float2 oTexCoord0 : TEXCOORD0,
          out float2 oTexCoord1 : TEXCOORD1,
          out float2 oTexCoord2 : TEXCOORD2)
{
    oPosition.x = Position.x;
    oPosition.y = Position.y;
    oPosition.z = 0.5;
    oPosition.w = 1.0;

    // Scale them into  UV lookup space
    float2 tc0scaled = EyeToSourceUVScale * TexCoord0 + EyeToSourceUVOffset;
    float2 tc1scaled = EyeToSourceUVScale * TexCoord1 + EyeToSourceUVOffset;
    float2 tc2scaled = EyeToSourceUVScale * TexCoord2 + EyeToSourceUVOffset;

    oTexCoord0  = tc0scaled;        // R sample.
    oTexCoord1  = tc1scaled;        // G sample.
    oTexCoord2  = tc2scaled;        // B sample.
    oColor      = Color.r;          // Used for vignette fade.
}