letterbox.txt

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// letterbox=ps_2_0
// Code from MPC

sampler s0 : register(s0);
float4 p0 : register(c0);

#define width (p0[0])
#define height (p0[1])
#define counter (p0[2])
#define clock (p0[3])

#define PI acos(-1)

float4 main(float2 tex : TEXCOORD0) : COLOR
{
	float4 c0 = 0;

	float2 ar = float2(16, 9);
	float h = (1 - width/height * ar.y/ar.x) / 2;

	if(tex.y >= h && tex.y <= 1-h)
		c0 = tex2D(s0, tex);

	return c0;
}