//======= Copyright (c) 2015-2020 Vera Visions LLC. All rights reserved. =======
//
// Purpose: 
//
// Lightmapped surface.
//==============================================================================

!!ver 110
!!permu FOG
!!permu BUMP
!!permu DELUXE
!!permu LIGHTSTYLED
!!samps 2

!!samps lightmap
!!samps =LIGHTSTYLED lightmap1 lightmap2 lightmap3
!!samps =DELUXE deluxemap
!!samps =LIGHTSTYLED =DELUXE deluxemap1 deluxemap2 deluxemap3

!!permu FAKESHADOWS
!!cvardf r_glsl_pcf
!!samps =FAKESHADOWS shadowmap

!!cvardf dev_skipdiffuse
!!cvardf dev_skipnormal

#include "sys/defs.h"

varying vec2 tex_c;

varying vec2 lm0;
#ifdef LIGHTSTYLED
varying vec2 lm1, lm2, lm3;
#endif

#ifdef FAKESHADOWS
	varying vec4 vtexprojcoord;
#endif

#ifdef VERTEX_SHADER
	void lightmapped_init(void)
	{
		lm0 = v_lmcoord;
		#ifdef LIGHTSTYLED
		lm1 = v_lmcoord2;
		lm2 = v_lmcoord3;
		lm3 = v_lmcoord4;
		#endif
	}

	void main ()
	{
		lightmapped_init();
		tex_c = v_texcoord;
		gl_Position = ftetransform();
		
		#ifdef FAKESHADOWS
		vtexprojcoord = (l_cubematrix*vec4(v_position.xyz, 1.0));
		#endif
	}
#endif

#ifdef FRAGMENT_SHADER

	#include "sys/fog.h"
	#include "sys/pcf.h"

	vec3 lightmap_fragment()
	{
		vec3 lightmaps;

#ifdef LIGHTSTYLED
		lightmaps  = texture2D(s_lightmap0, lm0).rgb * e_lmscale[0].rgb;
		lightmaps += texture2D(s_lightmap1, lm1).rgb * e_lmscale[1].rgb;
		lightmaps += texture2D(s_lightmap2, lm2).rgb * e_lmscale[2].rgb;
		lightmaps += texture2D(s_lightmap3, lm3).rgb * e_lmscale[3].rgb;
#else
		lightmaps  = texture2D(s_lightmap, lm0).rgb * e_lmscale.rgb;
#endif
		return lightmaps;
	}

	vec3 lightmap_fragment(vec3 normal_f)
	{
#ifndef DELUXE
		return lightmap_fragment();
#else
		vec3 lightmaps;

	#if defined(LIGHTSTYLED)
		lightmaps  = texture2D(s_lightmap0, lm0).rgb * e_lmscale[0].rgb * dot(normal_f, (texture2D(s_deluxemap0, lm0).rgb - 0.5) * 2.0);
		lightmaps += texture2D(s_lightmap1, lm1).rgb * e_lmscale[1].rgb * dot(normal_f, (texture2D(s_deluxemap1, lm1).rgb - 0.5) * 2.0);
		lightmaps += texture2D(s_lightmap2, lm2).rgb * e_lmscale[2].rgb * dot(normal_f, (texture2D(s_deluxemap2, lm2).rgb - 0.5) * 2.0);
		lightmaps += texture2D(s_lightmap3, lm3).rgb * e_lmscale[3].rgb * dot(normal_f, (texture2D(s_deluxemap3, lm3).rgb - 0.5) * 2.0);
	#else 
		lightmaps  = texture2D(s_lightmap, lm0).rgb * e_lmscale.rgb * dot(normal_f, (texture2D(s_deluxemap, lm0).rgb - 0.5) * 2.0);
	#endif

		return lightmaps;
#endif
	}

	void main (void)
	{
		vec4 diffuse_f;
		vec3 normal_f;

		normal_f = normalize(texture2D(s_t1, tex_c).rgb - 0.5);

		if (float(dev_skipdiffuse) == 1.0) {
			diffuse_f =  vec4(1.0,1.0,1.0,1.0);
		} else {
			diffuse_f = texture2D(s_t0, tex_c);
		}

	#ifdef FAKESHADOWS
		diffuse_f.rgb *= ShadowmapFilter(s_shadowmap, vtexprojcoord);
	#endif

		if (float(dev_skipnormal) == 1.0) {
			diffuse_f.rgb *= lightmap_fragment();
		} else {
			diffuse_f.rgb *= lightmap_fragment(normal_f);
		}

		gl_FragColor = fog4(diffuse_f);
	}
#endif