write_fragment_fs.glsl

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/**
 * @file
 * @brief Writes given fragment color to the rendering buffer. Adds glow if needed.
 */

#ifndef glsl110
   #if r_postprocess
       /** After glsl1110 this need to be explicitly declared; used by fixed functionality at the end of the OpenGL pipeline.*/
       out vec4 gl_FragData[2];
   #else
       /** After glsl1110 this need to be explicitly declared; used by fixed functionality at the end of the OpenGL pipeline.*/
       out vec4 gl_FragColor;
   #endif
#endif

uniform float GLOWSCALE;

/** Glowmap.*/
uniform sampler2D SAMPLER_GLOWMAP;

void writeFragment(vec4 color) {
#if r_postprocess
   gl_FragData[0] = color;
   if (GLOWSCALE > 0.01) {
       vec4 glowcolor = texture2D(SAMPLER_GLOWMAP, gl_TexCoord[0].st);
       gl_FragData[1].rgb = glowcolor.rgb * glowcolor.a * GLOWSCALE;
       gl_FragData[1].a = 1.0;
   } else {
       gl_FragData[1] = vec4(0,0,0,1);
   }
#else
   if (GLOWSCALE > 0.01) {
       vec4 glowcolor = texture2D(SAMPLER_GLOWMAP, gl_TexCoord[0].st);
       color.rgb += glowcolor.rgb * glowcolor.a * GLOWSCALE;
   }
   gl_FragColor = color;
#endif
}