Pete`s Messageboard Forum - OGL2 shaders - 2xSaL Smart shader

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/*
2xSaL Smart shader

- Copyright (C) 2007 guest(r) - guest.r@gmail.com

- License: GNU-GPL

*/


uniform sampler2D OGL2Texture;

const vec3 dt = vec3(1.4,1.4,1.4);

void main()
{
// Calculating texel coordinates

vec2 size = vec2(2048.0,1024.0);
vec2 inv_size = vec2(1.0/2048.0, 1.0/1024.0);

vec2 OGL2Pos = gl_TexCoord[0].xy*size;
vec2 fp = fract(OGL2Pos);
vec2 dx = vec2(inv_size.x,0.0);
vec2 dy = vec2(0.0,inv_size.y);
vec2 g1 = vec2( inv_size.x,inv_size.y);
vec2 g2 = vec2(-inv_size.x,inv_size.y);

vec2 pC4 = floor(OGL2Pos)*inv_size;


// Reading the texels

vec3 C0 = texture2D(OGL2Texture,pC4-g1).xyz;
vec3 C1 = texture2D(OGL2Texture,pC4-dy).xyz;
vec3 C2 = texture2D(OGL2Texture,pC4-g2).xyz;
vec3 C3 = texture2D(OGL2Texture,pC4-dx).xyz;
vec3 C4 = texture2D(OGL2Texture,pC4 ).xyz;
vec3 C5 = texture2D(OGL2Texture,pC4+dx).xyz;
vec3 C6 = texture2D(OGL2Texture,pC4+g2).xyz;
vec3 C7 = texture2D(OGL2Texture,pC4+dy).xyz;
vec3 C8 = texture2D(OGL2Texture,pC4+g1).xyz;

vec3 ul,ur,dl,dr; float m1,m2;

m1=dot(abs(C0-C4),dt)+0.001;
m2=dot(abs(C1-C3),dt)+0.001;
ul=(m2(C0+C4)+m1(C1+C3))/(m1+m2);

m1=dot(abs(C1-C5),dt)+0.001;
m2=dot(abs(C2-C4),dt)+0.001;
ur=(m2(C1+C5)+m1(C2+C4))/(m1+m2);

m1=dot(abs(C3-C7),dt)+0.001;
m2=dot(abs(C6-C4),dt)+0.001;
dl=(m2(C3+C7)+m1(C6+C4))/(m1+m2);

m1=dot(abs(C4-C8),dt)+0.001;
m2=dot(abs(C5-C7),dt)+0.001;
dr=(m2(C4+C8)+m1(C5+C7))/(m1+m2);

gl_FragColor.xyz = 0.5((drfp.x+dl(1-fp.x))fp.y+(urfp.x+ul(1-fp.x))*(1-fp.y));
}

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void main()

{
gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
gl_TexCoord[0] = gl_MultiTexCoord0;
}

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!!ARBvp1.0
OPTION ARB_position_invariant;
MOV result.texcoord,vertex.texcoord;
END

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!!ARBfp1.0

# 2xSaL Smart shader
# - Copyright (C) 2007 guest(r) - guest.r@gmail.com
# - License: GNU-GPL

PARAM dt={1.4,1.4,1.4,0.001};
PARAM size={2048.,1024.};
PARAM g1={ .00048828125,.0009765625};
PARAM g2={-.00048828125,.0009765625};
TEMP temp,fp,C0,C1,C2,C3,C4,C5,C6,C7,C8,m;
MOV C4,fragment.texcoord;
MUL fp,C4,size;
FRC fp,fp;
SUB C0,C4,g1;
SUB C1,C4,g1.zyzz;
SUB C2,C4,g2;
SUB C3,C4,g1.xzzz;
ADD C5,C4,g1.xzzz;
ADD C6,C4,g2;
ADD C7,C4,g1.zyzz;
ADD C8,C4,g1;
TEX C0,C0,texture,2D;
TEX C1,C1,texture,2D;
TEX C2,C2,texture,2D;
TEX C3,C3,texture,2D;
TEX C5,C5,texture,2D;
TEX C6,C6,texture,2D;
TEX C7,C7,texture,2D;
TEX C8,C8,texture,2D;
TEX C4,C4,texture,2D;

SUB temp,C0,C4;
ABS temp,temp;
DPH m.x,temp,dt;
SUB temp,C1,C3;
ABS temp,temp;
DPH m.y,temp,dt;
ADD m.z,m.x,m.y;
ADD temp,C0,C4;
ADD C0,C1,C3;
MUL C0,C0,m.x;
MAD C0,temp,m.y,C0;
RCP temp,m.z;
MUL C0,C0,temp;

SUB temp,C1,C5;
ABS temp,temp;
DPH m.x,temp,dt;
SUB temp,C2,C4;
ABS temp,temp;
DPH m.y,temp,dt;
ADD m.z,m.x,m.y;
ADD temp,C1,C5;
ADD C1,C2,C4;
MUL C1,C1,m.x;
MAD C1,temp,m.y,C1;
RCP temp,m.z;
MUL C1,C1,temp;

SUB temp,C3,C7;
ABS temp,temp;
DPH m.x,temp,dt;
SUB temp,C4,C6;
ABS temp,temp;
DPH m.y,temp,dt;
ADD m.z,m.x,m.y;
ADD temp,C3,C7;
ADD C2,C4,C6;
MUL C2,C2,m.x;
MAD C2,temp,m.y,C2;
RCP temp,m.z;
MUL C2,C2,temp;

SUB temp,C4,C8;
ABS temp,temp;
DPH m.x,temp,dt;
SUB temp,C5,C7;
ABS temp,temp;
DPH m.y,temp,dt;
ADD m.z,m.x,m.y;
ADD temp,C4,C8;
ADD C3,C5,C7;
MUL C3,C3,m.x;
MAD C3,temp,m.y,C3;
RCP temp,m.z;
MUL C3,C3,temp;

SUB m,1.0,fp;

MUL temp,C0,m.x;
MAD temp,C1,fp.x,temp;
MUL C8,temp,m.y;
MUL temp,C2,m.x;
MAD temp,C3,fp.x,temp;
MAD C8,temp,fp.y,C8;
MUL result.color,C8,0.5;
MOV result.color.a,C4.a;

END

Masthead

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2xSaL Smart shader

2xSaL Smart shader