#vertex

void main() {
    gl_FrontColor = gl_Color;
    gl_TexCoord[0]  = gl_MultiTexCoord0;
    gl_Position = ftransform();
}

#fragment

#define DX`(1.5 / 2048.0)
#define DY`(1.5 /   64.0)

uniform sampler2D tex;

void main() {
    vec4 c = texture2D(tex, vec2(gl_TexCoord[0].s + DX, gl_TexCoord[0].t + DY))
           + texture2D(tex, vec2(gl_TexCoord[0].s - DX, gl_TexCoord[0].t + DY))
           + texture2D(tex, vec2(gl_TexCoord[0].s + DX, gl_TexCoord[0].t - DY))
           + texture2D(tex, vec2(gl_TexCoord[0].s - DX, gl_TexCoord[0].t - DY));
    c = 0.1875 * c + 0.25 * texture2D(tex, gl_TexCoord[0].st);
    c *= vec4(1.5, 1.0, 0.5, 0.0);
    gl_FragColor = gl_Color * c;
}