UI: Add back ability to select a custom interface font

release/scripts/startup/bl_ui/space_userpref.py

@@ -487,8 +487,10 @@ class USERPREF_PT_system(Panel):
         sub.active = system.use_weight_color_range
         sub.template_color_ramp(system, "weight_color_range", expand=True)
 
+        column.separator()
+        column.prop(system, "font_path_ui")
+
         if bpy.app.build_options.international:
-            column.separator()
             column.prop(system, "use_international_fonts")
             if system.use_international_fonts:
                 column.prop(system, "language")

source/blender/blenfont/BLF_api.h

@@ -40,6 +40,7 @@ struct ColorManagedDisplay;
 int BLF_init(int points, int dpi);
 void BLF_exit(void);
 void BLF_default_dpi(int dpi);
+void BLF_default_set(int fontid);
 
 void BLF_cache_clear(void);
 
@@ -50,6 +51,7 @@ int BLF_load_unique(const char *name) ATTR_NONNULL();
 int BLF_load_mem_unique(const char *name, const unsigned char *mem, int mem_size) ATTR_NONNULL();
 
 void BLF_unload(const char *name) ATTR_NONNULL();
+void BLF_unload_id(int fontid);
 
 /* Attach a file with metrics information from memory. */
 void BLF_metrics_attach(int fontid, unsigned char *mem, int mem_size);

source/blender/blenfont/intern/blf.c

@@ -152,6 +152,14 @@ static int blf_search_available(void)
 	return -1;
 }
 
+void BLF_default_set(int fontid)
+{
+	FontBLF *font = blf_get(fontid);
+	if (font || fontid == -1) {
+		global_font_default = fontid;
+	}
+}
+
 static int blf_global_font_init(void)
 {
 	if (global_font_default == -1) {
@@ -335,6 +343,15 @@ void BLF_unload(const char *name)
 	}
 }
 
+void BLF_unload_id(int fontid)
+{
+	FontBLF *font = blf_get(fontid);
+	if (font) {
+		blf_font_free(font);
+		global_font[fontid] = NULL;
+	}
+}
+
 void BLF_enable(int fontid, int option)
 {
 	FontBLF *font = blf_get(fontid);

source/blender/blenkernel/intern/blender.c

@@ -384,6 +384,7 @@ void BKE_userdef_free(void)
 	wmKeyMapItem *kmi;
 	wmKeyMapDiffItem *kmdi;
 	bAddon *addon, *addon_next;
+	uiFont *font;
 
 	for (km = U.user_keymaps.first; km; km = km->next) {
 		for (kmdi = km->diff_items.first; kmdi; kmdi = kmdi->next) {
@@ -413,6 +414,12 @@ void BKE_userdef_free(void)
 		MEM_freeN(addon);
 	}
 
+	for (font = U.uifonts.first; font; font = font->next) {
+		BLF_unload_id(font->blf_id);
+	}
+
+	BLF_default_set(-1);
+
 	BLI_freelistN(&U.autoexec_paths);
 
 	BLI_freelistN(&U.uistyles);

source/blender/editors/interface/interface_style.c

@@ -340,11 +340,23 @@ void uiStyleInit(void)
 		U.dpi = 72;
 	CLAMP(U.dpi, 48, 144);
 	
+	for (font = U.uifonts.first; font; font = font->next) {
+		BLF_unload_id(font->blf_id);
+	}
+
+	font = U.uifonts.first;
+
 	/* default builtin */
 	if (font == NULL) {
 		font = MEM_callocN(sizeof(uiFont), "ui font");
 		BLI_addtail(&U.uifonts, font);
-		
+	}
+
+	if (U.font_path_ui[0]) {
+		BLI_strncpy(font->filename, U.font_path_ui, sizeof(font->filename));
+		font->uifont_id = UIFONT_CUSTOM1;
+	}
+	else {
 		BLI_strncpy(font->filename, "default", sizeof(font->filename));
 		font->uifont_id = UIFONT_DEFAULT;
 	}
@@ -381,8 +393,12 @@ void uiStyleInit(void)
 		}
 		else {
 			font->blf_id = BLF_load(font->filename);
-			if (font->blf_id == -1)
+			if (font->blf_id == -1) {
 				font->blf_id = BLF_load_mem("default", (unsigned char *)datatoc_bfont_ttf, datatoc_bfont_ttf_size);
+			}
+			else {
+				BLF_default_set(font->blf_id);
+			}
 		}
 
 		if (font->blf_id == -1) {

source/blender/makesdna/DNA_userdef_types.h

@@ -521,6 +521,8 @@ typedef struct UserDef {
 
 	char author[80];	/* author name for file formats supporting it */
 
+	char font_path_ui[1024];
+
 	int compute_device_type;
 	int compute_device_id;
 	

source/blender/makesrna/intern/rna_userdef.c

@@ -3707,7 +3707,12 @@ static void rna_def_userdef_system(BlenderRNA *brna)
 	RNA_def_property_range(prop, 48, 144);
 	RNA_def_property_ui_text(prop, "DPI", "Font size and resolution for display");
 	RNA_def_property_update(prop, 0, "rna_userdef_dpi_update");
-	
+
+	prop = RNA_def_property(srna, "font_path_ui", PROP_STRING, PROP_FILEPATH);
+	RNA_def_property_string_sdna(prop, NULL, "font_path_ui");
+	RNA_def_property_ui_text(prop, "Interface Font", "Path to interface font");
+	RNA_def_property_update(prop, NC_WINDOW, "rna_userdef_language_update");
+
 	prop = RNA_def_property(srna, "scrollback", PROP_INT, PROP_UNSIGNED);
 	RNA_def_property_int_sdna(prop, NULL, "scrollback");
 	RNA_def_property_range(prop, 32, 32768);