GIZNADS'S PROFILE

uniform sampler2DRect OGL2Texture;

void main()
{
	vec3 c  = texture2DRect(OGL2Texture, gl_TexCoord[0].xy).xyz;
	vec3 i1 = texture2DRect(OGL2Texture, gl_TexCoord[1].xy).xyz; 
	vec3 i2 = texture2DRect(OGL2Texture, gl_TexCoord[2].xy).xyz; 
	vec3 i3 = texture2DRect(OGL2Texture, gl_TexCoord[3].xy).xyz; 
	vec3 i4 = texture2DRect(OGL2Texture, gl_TexCoord[4].xy).xyz; 
	vec3 o1 = texture2DRect(OGL2Texture, gl_TexCoord[5].xy).xyz; 
	vec3 o3 = texture2DRect(OGL2Texture, gl_TexCoord[6].xy).xyz; 
	vec3 o2 = texture2DRect(OGL2Texture, gl_TexCoord[5].zw).xyz;
	vec3 o4 = texture2DRect(OGL2Texture, gl_TexCoord[6].zw).xyz; 
	vec3 dt = vec3(1.0,1.0,1.0);

	float ko1=dot(abs(o1-c),dt);
	float ko2=dot(abs(o2-c),dt);
	float ko3=dot(abs(o3-c),dt);
	float ko4=dot(abs(o4-c),dt);

	float k1=min(dot(abs(i1-i3),dt),dot(abs(o1-o3),dt));
	float k2=min(dot(abs(i2-i4),dt),dot(abs(o2-o4),dt));

	float w1 = k2; if(ko3<ko1) w1 = 0.0;
	float w2 = k1; if(ko4<ko2) w2 = 0.0;
	float w3 = k2; if(ko1<ko3) w3 = 0.0;
	float w4 = k1; if(ko2<ko4) w4 = 0.0;

	gl_FragColor.xyz = (w1*o1+w2*o2+w3*o3+w4*o4+0.0001*c)/(w1+w2+w3+w4+0.0001);
	gl_FragColor.a = 1.0;
}

uniform sampler2D texture;
uniform vec2 texture_dimensions;

void main() {
	// o = offset, the width of a pixel
	vec2 o = 1.0 / texture_dimensions;
	vec2 coord = gl_TexCoord[0].xy;
	// texel arrangement
	// A B C
	// D E F
	// G H I
	vec4 A = texture2D(texture, coord + vec2( -o.x,  o.y));
	vec4 B = texture2D(texture, coord + vec2(    0,  o.y));
	vec4 C = texture2D(texture, coord + vec2(  o.x,  o.y));
	vec4 D = texture2D(texture, coord + vec2( -o.x,    0));
	vec4 E = texture2D(texture, coord + vec2(    0,    0));
	vec4 F = texture2D(texture, coord + vec2(  o.x,    0));
	vec4 G = texture2D(texture, coord + vec2( -o.x, -o.y));
	vec4 H = texture2D(texture, coord + vec2(    0, -o.y));
	vec4 I = texture2D(texture, coord + vec2( o.x, -o.y));
	vec2 p = coord * texture_dimensions;
	// p = the position within a pixel [0...1]
	p = p - floor(p);
	if (p.x > .5) {
		if (p.y > .5) {
			// Top Right
			gl_FragColor = B == F && B != D && F != H ? F : E;
		} else {
			// Bottom Right
			gl_FragColor = H == F && D != H && B != F ? F : E;
		}
	} else {
		if (p.y > .5) {
			// Top Left
			gl_FragColor = D == B && B != F && D != H ? D : E;
		} else {
			// Bottom Left
			gl_FragColor = D == H && D != B && H != F ? D : E;
		}
	}
}