shaders: Add OpenGL stub shaders.

With a new SV_Target variable for color buffer output.

.gitattributes

@@ -20,3 +20,7 @@
 *.PDF	 diff=astextplain
 *.rtf	 diff=astextplain
 *.RTF	 diff=astextplain
+
+# Shaders are plain text
+*.vs	 diff=astextplain
+*.ps	 diff=astextplain

res/gamedata/shaders/gl/.s

@@ -0,0 +1,40 @@
+--[[
+function printf(fmt,...)
+	log(string.format(fmt,unpack(arg)))
+end
+]]--
+
+--[[
+t_point_att 	= "internal\\internal_light_attpoint"
+
+function r1_lspot	(shader, t_base, vs, aref)
+	shader:begin	(vs,"add_spot")
+	  		: fog		(false)
+			: zb 		(true,false)
+			: blend		(true,blend.one,blend.one)
+			: aref 		(true,aref or 0)
+	shader:sampler	("s_base")    	:texture	(t_base)
+	shader:sampler	("s_lmap")    	:texture	("internal\\internal_light_att")
+			: clamp		()
+			: f_linear 	()
+			: project   	(true)
+	shader:sampler	("s_att")    	:texture	("internal\\internal_light_attclip")
+			: clamp		()
+			: f_linear	()
+end
+
+function r1_lpoint	(shader, t_base, vs, aref)
+	shader:begin	(vs,"add_point")
+	  		: fog		(false)
+			: zb 		(true,false)
+			: blend		(true,blend.one,blend.one)
+			: aref 		(true,aref or 0)
+	shader:sampler	("s_base")    	:texture	(t_base)
+	shader:sampler	("s_lmap")    	:texture	(t_point_att)
+			: clamp		()
+			: f_linear 	()
+	shader:sampler	("s_att")    	:texture	(t_point_att)
+			: clamp		()
+			: f_linear	()
+end
+]]--

res/gamedata/shaders/gl/common.h

@@ -0,0 +1,21 @@
+#ifndef        COMMON_H
+#define        COMMON_H
+
+#include "shared\common.h"
+
+//include "common_defines.h"
+//include "common_policies.h"
+#include "common_iostructs.h"
+//include "common_samplers.h"
+//include "common_cbuffers.h"
+//include "common_functions.h"
+
+// #define USE_SUPER_SPECULAR
+
+#ifdef        USE_R2_STATIC_SUN
+#  define xmaterial float(1.0f/4.fs)
+#else
+#  define xmaterial float(L_material.w)
+#endif
+
+#endif