Add r_2D_unfiltered CVar, improve r_nolerp_list handling

Setting r_2D_unfiltered to 1 (0 is default), 2D elements (GUI, menu,
console) are rendered without texture filtering in GL1 and GL3, while
everything else is still rendered with whatever is set in gl_texturemode

This setting (and now also gl_nolerp_list) is applied immediately,
so no vid_restart is needed.

refs #752

src/client/refresh/gl1/gl1_image.c

@@ -214,13 +214,16 @@ R_TextureMode(char *string)
 	}
 
 	const char* nolerplist = gl_nolerp_list->string;
+	qboolean unfiltered2D = r_2D_unfiltered->value != 0;
 
 	/* change all the existing mipmap texture objects */
 	for (i = 0, glt = gltextures; i < numgltextures; i++, glt++)
 	{
-		if (nolerplist != NULL && strstr(nolerplist, glt->name) != NULL)
+		qboolean nolerp = false;
+		/* r_2D_unfiltered and r_nolerp_list allow rendering stuff unfiltered even if gl_filter_* is filtered */
+		if ( (unfiltered2D && glt->type == it_pic) || (nolerplist != NULL && strstr(nolerplist, glt->name) != NULL) )
 		{
-			continue; /* those (by default: font and crosshairs) always only use GL_NEAREST */
+			nolerp = true;
 		}
 
 		R_Bind(glt->texnum);
@@ -237,6 +240,14 @@ R_TextureMode(char *string)
 			}
 		}
 		else /* texture has no mipmaps */
+		{
+			if (nolerp)
+			{
+				// this texture shouldn't be filtered at all (no gl_nolerp_list or r_2D_unfiltered case)
+				glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+				glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+			}
+			else
 			{
 				// we can't use gl_filter_min which might be GL_*_MIPMAP_*
 				// also, there's no anisotropic filtering for textures w/o mipmaps
@@ -245,6 +256,7 @@ R_TextureMode(char *string)
 			}
 		}
 	}
+}
 
 void
 R_TextureAlphaMode(char *string)
@@ -849,8 +861,11 @@ R_LoadPic(char *name, byte *pic, int width, int realwidth,
 	int i;
 
 	qboolean nolerp = false;
-
+	if (r_2D_unfiltered->value && type == it_pic)
-	if(gl_nolerp_list != NULL && gl_nolerp_list->string != NULL)
+	{
+		nolerp = true;
+	}
+	else if(gl_nolerp_list != NULL && gl_nolerp_list->string != NULL)
 	{
 		nolerp = strstr(gl_nolerp_list->string, name) != NULL;
 	}

src/client/refresh/gl1/gl1_main.c

@@ -104,6 +104,7 @@ cvar_t *r_retexturing;
 cvar_t *r_scale8bittextures;
 
 cvar_t *gl_nolerp_list;
+cvar_t *r_2D_unfiltered;
 
 cvar_t *gl1_dynamic;
 cvar_t *r_modulate;
@@ -1266,6 +1267,8 @@ R_Register(void)
 
 	/* don't bilerp characters and crosshairs */
 	gl_nolerp_list = ri.Cvar_Get("r_nolerp_list", "pics/conchars.pcx pics/ch1.pcx pics/ch2.pcx pics/ch3.pcx", 0);
+	/* don't bilerp any 2D elements */
+	r_2D_unfiltered = ri.Cvar_Get("r_2D_unfiltered", "0", CVAR_ARCHIVE);
 
 	gl1_stereo = ri.Cvar_Get( "gl1_stereo", "0", CVAR_ARCHIVE );
 	gl1_stereo_separation = ri.Cvar_Get( "gl1_stereo_separation", "-0.4", CVAR_ARCHIVE );
@@ -1689,11 +1692,14 @@ RI_BeginFrame(float camera_separation)
 	}
 
 	/* texturemode stuff */
-	if (gl_texturemode->modified || (gl_config.anisotropic && gl_anisotropic->modified))
+	if (gl_texturemode->modified || (gl_config.anisotropic && gl_anisotropic->modified)
+	    || gl_nolerp_list->modified || r_2D_unfiltered->modified)
 	{
 		R_TextureMode(gl_texturemode->string);
 		gl_texturemode->modified = false;
 		gl_anisotropic->modified = false;
+		gl_nolerp_list->modified = false;
+		r_2D_unfiltered->modified = false;
 	}
 
 	if (gl1_texturealphamode->modified)

src/client/refresh/gl1/header/local.h

@@ -195,6 +195,7 @@ extern cvar_t *r_retexturing;
 extern cvar_t *r_scale8bittextures;
 
 extern cvar_t *gl_nolerp_list;
+extern cvar_t *r_2D_unfiltered;
 
 extern cvar_t *gl_lightmap;
 extern cvar_t *gl_shadows;

src/client/refresh/gl3/gl3_image.c

@@ -88,13 +88,16 @@ GL3_TextureMode(char *string)
 	gl3image_t *glt;
 
 	const char* nolerplist = gl_nolerp_list->string;
+	qboolean unfiltered2D = r_2D_unfiltered->value != 0;
 
 	/* change all the existing texture objects */
 	for (i = 0, glt = gl3textures; i < numgl3textures; i++, glt++)
 	{
-		if (nolerplist != NULL && strstr(nolerplist, glt->name) != NULL)
+		qboolean nolerp = false;
+		/* r_2D_unfiltered and gl_nolerp_list allow rendering stuff unfiltered even if gl_filter_* is filtered */
+		if ( (unfiltered2D && glt->type == it_pic) || (nolerplist != NULL && strstr(nolerplist, glt->name) != NULL) )
 		{
-			continue; /* those (by default: font and crosshairs) always only use GL_NEAREST */
+			nolerp = true;
 		}
 
 		GL3_SelectTMU(GL_TEXTURE0);
@@ -111,6 +114,14 @@ GL3_TextureMode(char *string)
 			}
 		}
 		else /* texture has no mipmaps */
+		{
+			if (nolerp)
+			{
+				// this texture shouldn't be filtered at all (no gl_nolerp_list or r_2D_unfiltered case)
+				glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+				glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+			}
+			else
 			{
 				// we can't use gl_filter_min which might be GL_*_MIPMAP_*
 				// also, there's no anisotropic filtering for textures w/o mipmaps
@@ -119,6 +130,7 @@ GL3_TextureMode(char *string)
 			}
 		}
 	}
+}
 
 void
 GL3_Bind(GLuint texnum)
@@ -375,8 +387,11 @@ GL3_LoadPic(char *name, byte *pic, int width, int realwidth,
 	int i;
 
 	qboolean nolerp = false;
-
+	if (r_2D_unfiltered->value && type == it_pic)
-	if (gl_nolerp_list != NULL && gl_nolerp_list->string != NULL)
+	{
+		nolerp = true;
+	}
+	else if (gl_nolerp_list != NULL && gl_nolerp_list->string != NULL)
 	{
 		nolerp = strstr(gl_nolerp_list->string, name) != NULL;
 	}

src/client/refresh/gl3/gl3_main.c

@@ -107,6 +107,7 @@ cvar_t *r_norefresh;
 cvar_t *r_drawentities;
 cvar_t *r_drawworld;
 cvar_t *gl_nolerp_list;
+cvar_t *r_2D_unfiltered;
 cvar_t *gl_nobind;
 cvar_t *r_lockpvs;
 cvar_t *r_novis;
@@ -221,6 +222,8 @@ GL3_Register(void)
 
 	/* don't bilerp characters and crosshairs */
 	gl_nolerp_list = ri.Cvar_Get("r_nolerp_list", "pics/conchars.pcx pics/ch1.pcx pics/ch2.pcx pics/ch3.pcx", 0);
+	/* don't bilerp any 2D elements */
+	r_2D_unfiltered = ri.Cvar_Get("r_2D_unfiltered", "0", CVAR_ARCHIVE);
 	gl_nobind = ri.Cvar_Get("gl_nobind", "0", 0);
 
 	gl_texturemode = ri.Cvar_Get("gl_texturemode", "GL_LINEAR_MIPMAP_NEAREST", CVAR_ARCHIVE);
@@ -1766,11 +1769,14 @@ GL3_BeginFrame(float camera_separation)
 	}
 
 	/* texturemode stuff */
-	if (gl_texturemode->modified || (gl3config.anisotropic && gl_anisotropic->modified))
+	if (gl_texturemode->modified || (gl3config.anisotropic && gl_anisotropic->modified)
+	    || gl_nolerp_list->modified || r_2D_unfiltered->modified)
 	{
 		GL3_TextureMode(gl_texturemode->string);
 		gl_texturemode->modified = false;
 		gl_anisotropic->modified = false;
+		gl_nolerp_list->modified = false;
+		r_2D_unfiltered->modified = false;
 	}
 
 	if (r_vsync->modified)

src/client/refresh/gl3/header/local.h

@@ -487,6 +487,7 @@ extern cvar_t *r_mode;
 extern cvar_t *r_customwidth;
 extern cvar_t *r_customheight;
 
+extern cvar_t *r_2D_unfiltered;
 extern cvar_t *gl_nolerp_list;
 extern cvar_t *gl_nobind;
 extern cvar_t *r_lockpvs;