source: trunk/tools/neercs/video/color.lolfx @ 1836 Tweet

-- GLSL.Vert --

#version 120

void main()
        {
        gl_Position=gl_Vertex;
        gl_TexCoord[0]=gl_MultiTexCoord0;
        }

-- GLSL.Frag --

#version 120

uniform sampler2D texture;
uniform vec2 screen_size;
uniform vec3 filter;
uniform vec3 color;
uniform float flash;

void main(void)
        {
        vec2 p=gl_FragCoord.xy/screen_size.xy;
        vec3 c=texture2D(texture,p).xyz;

        float a=(c.x+c.y+c.z)/3.0;
        c=mix(c,vec3(a),color.z);                                                               // grayscale
        c*=filter;                                                                                              // filter
        c*=color.x;                                                                                             // brightness
        c=0.5+(c-0.5)*color.y;                                                                  // contrast
        c+=flash;                                                                                               // flash

        gl_FragColor=vec4(c,1.0);
        }