load specific font in memory

__init__.py

@@ -347,6 +347,10 @@ class ABC3D_PT_FontList(bpy.types.Panel):
                 scale_y = 0.5
                 row = subbox.row(); row.scale_y = scale_y
                 row.label(text=text)
+            row = layout.row()
+            oper = row.operator(f"{__name__}.load_font", text='Load all glyphs in memory')
+            oper.font_name = font_name
+            oper.face_name = face_name
 
 
 class ABC3D_PT_TextPlacement(bpy.types.Panel):
@@ -710,6 +714,21 @@ class ABC3D_OT_LoadInstalledFonts(bpy.types.Operator):
 
         return {'FINISHED'}
 
+class ABC3D_OT_LoadFont(bpy.types.Operator):
+    """Load all glyphs from a specific font in memory.\nThis can take a while and slow down Blender."""
+    bl_idname = f"{__name__}.load_font"
+    bl_label = "Loading Font."
+    bl_options = {'REGISTER', 'UNDO'}
+
+    font_name: bpy.props.StringProperty()
+    face_name: bpy.props.StringProperty()
+
+    def execute(self, context):
+        filepaths = Font.fonts[self.font_name].faces[self.face_name].filepaths
+        for f in filepaths:
+            butils.load_font_from_filepath(f)
+        return {'FINISHED'}
+
 class ABC3D_OT_AddDefaultMetrics(bpy.types.Operator):
     """Add default metrics to selected objects"""
     bl_idname = f"{__name__}.add_default_metrics"
@@ -1353,6 +1372,7 @@ classes = (
             ABC3D_PT_FontCreation,
             ABC3D_PT_TextPropertiesPanel,
             ABC3D_OT_LoadInstalledFonts,
+            ABC3D_OT_LoadFont,
             ABC3D_OT_AddDefaultMetrics,
             ABC3D_OT_RemoveMetrics,
             ABC3D_OT_AlignMetricsToActiveObject,