source: trunk/neercs/video/glow.lolfx @ 1456 Tweet

-- GLSL.Vert --

#version 120

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

-- GLSL.Frag --

#version 120

uniform sampler2D texture;
uniform sampler2D texture_prv;
uniform int screen_w;
uniform int screen_h;
uniform float time;
uniform float step;
uniform float value1;
uniform float value2;

void main(void)
        {
        vec2 p=gl_TexCoord[0].xy;
        vec4 source=texture2D(texture_prv,p);
        vec4 glow=texture2D(texture,p);
        source=smoothstep(step,1.0,source);
        vec4 color=glow*value1+source*value2;
        gl_FragColor=color;
        }