v002.blur.frag

varying vec2 texcoord0;
varying vec2 texcoord1;
varying vec2 texcoord2;
//varying vec2 texcoord3;
//varying vec2 texcoord4;
//varying vec2 texcoord5;
//varying vec2 texcoord6;
//varying vec2 texcoord7;
//varying vec2 texcoord8;

// define our rectangular texture samplers 
uniform sampler2DRect tex0;

/*
// bilinear filtering
#define C0        vec2( 1.0, 0.0 )
#define C1        vec2( 0.0, 1.0 )
#define C2        vec2( 1.0, 1.0 )
#define TX        texture2DRect
vec4 bilinearTexture2DRect( const sampler2DRect Sampler, const vec2 Coord )
{
        vec2 Fract = fract( Coord );

        return mix(mix(TX(Sampler, (Coord)), TX(Sampler, (Coord + C0)),Fract.s), mix(TX(Sampler, (Coord + C1)), TX(Sampler,(Coord + C2)), Fract.s), Fract.t);
}  
*/

void main (void) 
{ 
	
	vec4 sample0 = texture2DRect(tex0, texcoord0);
	vec4 sample1 = texture2DRect(tex0, texcoord1);
	vec4 sample2 = texture2DRect(tex0, texcoord2);
	
//	vec4 sample0 = bilinearTexture2DRect(tex0, texcoord0);
//	vec4 sample1 = bilinearTexture2DRect(tex0, texcoord1);
//	vec4 sample2 = bilinearTexture2DRect(tex0, texcoord2);

/*  vec4 sample3 = texture2DRect(tex0, texcoord3);
    vec4 sample4 = texture2DRect(tex0, texcoord4);
    vec4 sample5 = texture2DRect(tex0, texcoord5);
    vec4 sample6 = texture2DRect(tex0, texcoord6);
    vec4 sample7 = texture2DRect(tex0, texcoord7);
    vec4 sample8 = texture2DRect(tex0, texcoord8);
*/
	// quasi gaussian distro
/*	vec4 result = sample0 * .25;
	result += (sample4 + sample5) * 0.2;
	result += (sample3 + sample6) * 0.1;
	result += (sample2 + sample7) * 0.05;
	result += (sample1 + sample8) * 0.025;
*/	

//	gl_FragColor = result;

//	gl_FragColor = 0.1752 * sample0 + 0.1658 * (sample5 + sample4) + 0.1403 * (sample3 + sample6) + 0.1063 * (sample1 + sample8);

//	straight average
//	gl_FragColor = (sample0 + sample1 + sample2 + sample3 + sample4 + sample5 + sample6 + sample7 + sample8) / 9.0;
//	gl_FragColor = (sample0 * 0.5) + (sample1 * .25)  + (sample2 * .25);

	gl_FragColor =  (sample0 + sample1 + sample2) / (3.0);
}