uniform sampler2D LeftUnit, RightUnit;
uniform float OffsetS, OffsetT;
uniform float Red, Green, Blue;

void main()
{
	vec2 st = gl_TexCoord[0].st;
	vec4 left  = texture2D( LeftUnit,  st );
	vec4 right = texture2D( RightUnit, st+vec2(OffsetS,OffsetT) );

	vec3 color = vec3( left.r, right.gb );
	color *= vec3( Red, Green, Blue );
	color = clamp( color, 0., 1. );

	gl_FragColor = vec4( color, 1. );
}