do not assume alpha test works (because it does not in gles2 / core).

git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@4300 fc73d0e0-1445-4013-8a0c-d673dee63da5

engine/gl/gl_backend.c

@@ -2383,7 +2383,7 @@ static void BE_SendPassBlendDepthMask(unsigned int sbits)
 	}
 
 #ifdef GL_ALPHA_TEST	//alpha test doesn't exist in gles2
-	if (delta & SBITS_ATEST_BITS)
+	if ((delta & SBITS_ATEST_BITS) && !gl_config.nofixedfunc)
 	{
 		switch (sbits & SBITS_ATEST_BITS)
 		{

engine/gl/gl_model.c

@@ -4383,7 +4383,11 @@ void * RMod_LoadSpriteFrame (void * pin, mspriteframe_t **ppframe, int framenum,
 	Q_strncatz(name, va("_%i.tga", framenum), sizeof(name));
 	pspriteframe->shader = R_RegisterShader(name,
 			"{\n"
-				"program defaultsprite\n"
+				"if gl_blendsprites\n"
+					"program defaultsprite\n"
+				"else\n"
+					"program defaultsprite#MASK=1\n"
+				"endif\n"
 				"{\n"
 					"map $diffuse\n"
 					"alphafunc ge128\n"

engine/gl/r_bishaders.h

@@ -860,7 +860,12 @@ YOU SHOULD NOT EDIT THIS FILE BY HAND
 "uniform vec4 e_colourident;\n"
 "void main ()\n"
 "{\n"
-"gl_FragColor = fog4blend(texture2D(s_t0, tc) * vc * e_colourident);\n"
+"vec4 col = texture2D(s_t0, tc);\n"
+"#ifdef MASK\n"
+"if (col.a < 0.5)\n"
+"discard;\n"
+"#endif\n"
+"gl_FragColor = fog4blend(col * vc * e_colourident);\n"
 "}\n"
 "#endif\n"
 },

engine/qclib/pr_edict.c

@@ -529,7 +529,7 @@ char *PR_ValueString (progfuncs_t *progfuncs, etype_t type, eval_t *val)
 		}
 		break;
 	case ev_field:
-		fielddef = ED_FieldAtOfs (progfuncs,  val->_int );
+		fielddef = ED_FieldAtOfs (progfuncs,  val->_int + progfuncs->funcs.fieldadjust);
 		if (!fielddef)
 			sprintf (line, ".??? (%i)", val->_int);
 		else

engine/shaders/glsl/defaultsprite.glsl

@@ -22,6 +22,11 @@ varying vec4 vc;
 uniform vec4 e_colourident;
 void main ()
 {
-	gl_FragColor = fog4blend(texture2D(s_t0, tc) * vc * e_colourident);
+	vec4 col = texture2D(s_t0, tc);
+#ifdef MASK
+	if (col.a < 0.5)
+		discard;
+#endif
+	gl_FragColor = fog4blend(col * vc * e_colourident);
 }
 #endif