Support disable font hinting: Ref #732

Author: raphamorim

docs/docs/config/fonts.md

@@ -81,6 +81,15 @@ In case you would like to change:
 # family = "Noto Color Emoji"
 ```
 
+## Hinting
+
+Enable or disable font hinting. It is enabled by default.
+
+```toml
+[fonts]
+hinting = true
+```
+
 ## User interface
 
 You can specify user interface font on Rio.

docs/docs/releases.md

@@ -18,6 +18,7 @@ language: 'en'
 - Microsoft Windows: [Rio terminal is now available on WinGet packages](https://github.com/microsoft/winget-pkgs/pull/184792).
 - Microsoft Windows: [Rio terminal is now available on MINGW packages](https://github.com/msys2/MINGW-packages/pull/22248).
 - Allow MacOS automation via events.
+- Support disable font hinting: `fonts.hinting = false`.
 - Fix: Configuration updates triggered multiple times on one save.
 - Support to RetroArch shaders [@igorsaux](https://github.com/igorsaux).
 - Fix: Set notepad as a default editor on Windows by [@igorsaux](https://github.com/igorsaux).

sugarloaf/src/components/rich_text/image_cache/glyph.rs

@@ -126,6 +126,7 @@ impl<'a> GlyphCacheSession<'a> {
 
         self.scaled_image.data.clear();
         let mut font_library_data = self.font_library.inner.lock();
+        let enable_hint = font_library_data.hinting;
         let font_data = font_library_data.get(&self.font);
         let should_embolden = font_data.should_embolden;
         let should_italicize = font_data.should_italicize;
@@ -140,7 +141,7 @@ impl<'a> GlyphCacheSession<'a> {
                 // As a result Apple's Quartz text renderer, which is targeted for Retina displays,
                 // now ignores font hint information completely.
                 // .hint(!IS_MACOS)
-                .hint(true)
+                .hint(enable_hint)
                 .size(self.quant_size.into())
                 // .normalized_coords(coords)
                 .build();

sugarloaf/src/font/fonts.rs

@@ -40,6 +40,11 @@ pub fn default_font_size() -> f32 {
     14.
 }
 
+#[inline]
+pub fn default_font_hinting() -> bool {
+    true
+}
+
 fn default_font_family() -> String {
     DEFAULT_FONT_FAMILY.to_string()
 }
@@ -80,6 +85,8 @@ pub fn default_font_bold_italic() -> SugarloafFont {
 pub struct SugarloafFonts {
     #[serde(default = "default_font_size")]
     pub size: f32,
+    #[serde(default = "default_font_hinting")]
+    pub hinting: bool,
     #[serde(default = "Option::default")]
     pub features: Option<Vec<String>>,
     #[serde(default = "Option::default")]
@@ -104,6 +111,7 @@ impl Default for SugarloafFonts {
     fn default() -> SugarloafFonts {
         SugarloafFonts {
             features: None,
+            hinting: true,
             size: default_font_size(),
             family: None,
             emoji: None,

sugarloaf/src/font/mod.rs

@@ -123,6 +123,7 @@ pub struct FontLibraryData {
     // Standard is fallback for everything, it is also the inner number 0
     pub inner: FxHashMap<usize, FontData>,
     pub stash: LruCache<usize, SharedData>,
+    pub hinting: bool,
 }
 
 impl Default for FontLibraryData {
@@ -131,6 +132,7 @@ impl Default for FontLibraryData {
             ui: FontArc::try_from_slice(FONT_CASCADIAMONO_REGULAR).unwrap(),
             inner: FxHashMap::default(),
             stash: LruCache::new(NonZeroUsize::new(2).unwrap()),
+            hinting: true,
         }
     }
 }
@@ -243,6 +245,9 @@ impl FontLibraryData {
 
     #[cfg(not(target_arch = "wasm32"))]
     pub fn load(&mut self, mut spec: SugarloafFonts) -> Vec<SugarloafFont> {
+        // Configure hinting through spec
+        self.hinting = spec.hinting;
+
         let mut fonts_not_fount: Vec<SugarloafFont> = vec![];
 
         // If fonts.family does exist it will overwrite all families