struct fragmentIN 
{
  float4 HPosition : POSITION;
  float4 TexCoord : TEXCOORD0;
};

struct fragmentOUT 
{
  float4 Color : COLOR;
};

fragmentOUT main(
  fragmentIN IN,
  uniform sampler2D channel1,
  uniform float w
) 
{
  fragmentOUT OUT;

  float2 tex = IN.TexCoord.xy;
  float4 col1;
  col1 = f4tex2D(channel1, tex);

  OUT.Color.rgb = col1 * w;

  return OUT;
}