float4x4 view_proj_matrix: register(c0);


struct VS_OUTPUT
{
   float4 Pos      : POSITION;
   float2 TexCoord : TEXCOORD0;
};

VS_OUTPUT main(  float4 Pos      : POSITION,
   float2 TexCoord : TEXCOORD0)
{
   VS_OUTPUT Out; 

   Pos.xy = sign(Pos.xy);
   Out.Pos       = float4(Pos.xy, 0.0, 1.0);
   // Image-space
   Out.TexCoord.x = 0.5 * (1 + Pos.x);
   Out.TexCoord.y = 0.5 * (1 - Pos.y);

   return Out;
}