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Cache codepoint support info for monospace fonts

Browse source 
For the simplest case of " " words, a quick binary search in
 `supported` vec will suffice, instead of using `slice::contains()`
 for all monospace fonts, where some of them may support thousands of
 codepoints.

Signed-off-by: Mohammad AlSaleh <CE.Mohammad.AlSaleh@gmail.com>
This commit is contained in:
Mohammad AlSaleh 2024-02-25 22:39:27 +03:00 • committed by Jeremy Soller
parent a53a0b3a8c
commit 3e02ae1ea6
2 changed files with 87 additions and 9 deletions
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15
src/font/fallback/mod.rs
View file

@ -176,15 +176,12 @@ impl<'a> Iterator for FontFallbackIter<'a> {
if let Some(face_info) = self.font_system.db().face(m_key.id) {
// Don't use emoji fonts as Monospace
if face_info.monospaced && !face_info.post_script_name.contains("Emoji") {
if let Some(font) = self.font_system.get_font(m_key.id) {
let codepoint_non_matches = self.word.chars().count()
- self
.word
.chars()
.filter(|ch| {
font.unicode_codepoints().contains(&u32::from(*ch))
})
.count();
let supported_cp_count_opt = self
.font_system
.get_font_supported_codepoints_in_word(m_key.id, self.word);
if let Some(supported_cp_count) = supported_cp_count_opt {
let codepoint_non_matches =
self.word.chars().count() - supported_cp_count;
let fallback_info = MonospaceFallbackInfo {
font_weight_diff: Some(m_key.font_weight_diff),