Make registering Vizia's default fonts optional

BREAKING_CHANGES.md

@@ -20,6 +20,10 @@ code then it will not be listed here.
   call `nih_plug_vizia::assets::register_noto_sans_light()` for the default
   theming to work. All of the plugins in this repo also use
   `nih_plug_vizia::assets::register_noto_sans_thin()` as a title font.
+- Additionally, the Vizia fork has been updated to not register _any_ default
+  fonts for the same reason. If you previously relied on Vizia's default Roboto
+  font, then you must now call `nih_plug_vizia::vizia_assets::register_roboto()`
+  at the start of your process function.
 
 ## [2022-10-23]
 

nih_plug_vizia/src/lib.rs

@@ -16,6 +16,7 @@ use vizia::prelude::*;
 pub use vizia;
 
 pub mod assets;
+pub mod vizia_assets;
 pub mod widgets;
 
 /// Create an [`Editor`] instance using a [`vizia`][::vizia] GUI. The [`ViziaState`] passed to this

nih_plug_vizia/src/vizia_assets.rs

@@ -0,0 +1,45 @@
+//! Registration functions for Vizia's built-in fonts. These are not enabled by default in
+//! `nih_plug_vizia` to save on binary size.
+
+use vizia::prelude::*;
+
+// This module provides a re-export and simple font wrappers around the re-exported fonts.
+pub use vizia::fonts;
+
+/// The font name for the Roboto (Regular) font, needs to be registered using [`register_roboto()`]
+/// first.
+pub const ROBOTO: &str = "roboto";
+/// The font name for the Roboto Bold font, needs to be registered using [`register_roboto_bold()`]
+/// first.
+pub const ROBOTO_BOLD: &str = "roboto-bold";
+/// The font name for the icon font (Entypo), needs to be registered using [`register_icons()`]
+/// first.
+pub const ICONS: &str = "icons";
+/// The font name for the emoji font (Open Sans Eomji), needs to be registered using
+/// [`register_emoji()`] first.
+pub const EMOJI: &str = "emoji";
+/// The font name for the arabic font (Amiri Regular), needs to be registered using
+/// [`register_arabic()`] first.
+pub const ARABIC: &str = "arabic";
+/// The font name for the material font (Material Icons), needs to be registered using
+/// [`register_material()`] first.
+pub const MATERIAL: &str = "material";
+
+pub fn register_roboto(cx: &mut Context) {
+    cx.add_font_mem(ROBOTO, fonts::ROBOTO_REGULAR);
+}
+pub fn register_roboto_bold(cx: &mut Context) {
+    cx.add_font_mem(ROBOTO_BOLD, fonts::ROBOTO_BOLD);
+}
+pub fn register_icons(cx: &mut Context) {
+    cx.add_font_mem(ICONS, fonts::ENTYPO);
+}
+pub fn register_emoji(cx: &mut Context) {
+    cx.add_font_mem(EMOJI, fonts::OPEN_SANS_EMOJI);
+}
+pub fn register_arabic(cx: &mut Context) {
+    cx.add_font_mem(ARABIC, fonts::AMIRI_REGULAR);
+}
+pub fn register_material(cx: &mut Context) {
+    cx.add_font_mem(MATERIAL, fonts::MATERIAL_ICONS_REGULAR);
+}