!!ver 130
!!permu FOG
!!samps 1
!!cvardf gl_mono=0

#include "sys/fog.h"
#ifdef VERTEX_SHADER
attribute vec2 v_texcoord;
attribute vec4 v_colour;
varying vec2 tc;
varying vec4 vc;
void main ()
{
	tc = v_texcoord;
	vc = v_colour;
	gl_Position = ftetransform();
}
#endif

#ifdef FRAGMENT_SHADER
varying vec2 tc;
varying vec4 vc;
uniform vec4 e_colourident;
uniform vec4 e_vlscale;
void main ()
{
	vec4 col = texture2D(s_t0, tc);

#ifdef MASK
	if (col.a < float(MASK))
		discard;
#endif

	col = fog4blend(col * vc * e_colourident * e_vlscale);

	if (gl_mono == 1.0) {
		float bw = (col.r + col.g + col.b) / 3.0;
		col.rgb = vec3(bw, bw, bw) * 1.5;
	}

	gl_FragColor = col;
}
#endif