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[fontations] Cache GlyphMetrics objects

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This commit is contained in:
Behdad Esfahbod 2025-03-06 23:50:05 -07:00
parent 6506bd7e82
commit abc468275b
1 changed files with 18 additions and 13 deletions
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31
src/fontations/lib.rs
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@ -2,6 +2,7 @@
#![allow(non_upper_case_globals)]
include!(concat!(env!("OUT_DIR"), "/hb.rs"));
use std::mem::transmute;
use std::os::raw::c_void;
use std::ptr::null_mut;
use std::sync::atomic::{AtomicPtr, Ordering};
@ -15,7 +16,7 @@ use skrifa::color::{
};
use skrifa::font::FontRef;
use skrifa::instance::{Location, NormalizedCoord, Size};
use skrifa::metrics::BoundingBox;
use skrifa::metrics::{BoundingBox, GlyphMetrics};
use skrifa::outline::pen::OutlinePen;
use skrifa::outline::DrawSettings;
use skrifa::OutlineGlyphCollection;
@ -30,6 +31,8 @@ struct FontationsData<'a> {
x_size: Size,
y_size: Size,
location: Location,
x_glyph_metrics: Option<GlyphMetrics<'a>>,
y_glyph_metrics: Option<GlyphMetrics<'a>>,
outline_glyphs: OutlineGlyphCollection<'a>,
color_glyphs: ColorGlyphCollection<'a>,
}
@ -80,16 +83,25 @@ impl FontationsData<'_> {
let color_glyphs = font_ref.color_glyphs();
FontationsData {
let mut data = FontationsData {
face_blob,
font_ref,
char_map,
x_size,
y_size,
location,
x_glyph_metrics: None,
y_glyph_metrics: None,
outline_glyphs,
color_glyphs,
}
};
// transmute location
let location = transmute::<&Location, &Location>(&data.location);
data.x_glyph_metrics = Some(data.font_ref.glyph_metrics(data.x_size, location));
let location = transmute::<&Location, &Location>(&data.location);
data.y_glyph_metrics = Some(data.font_ref.glyph_metrics(data.y_size, location));
data
}
}
@ -164,10 +176,7 @@ extern "C" fn _hb_fontations_get_glyph_h_advances(
_user_data: *mut ::std::os::raw::c_void,
) {
let data = unsafe { &*(font_data as *const FontationsData) };
let font_ref = &data.font_ref;
let size = &data.x_size;
let location = &data.location;
let glyph_metrics = font_ref.glyph_metrics(*size, location);
let glyph_metrics = &data.y_glyph_metrics.as_ref().unwrap();
for i in 0..count {
let glyph = struct_at_offset(first_glyph, i, glyph_stride);
@ -187,12 +196,8 @@ extern "C" fn _hb_fontations_get_glyph_extents(
_user_data: *mut ::std::os::raw::c_void,
) -> hb_bool_t {
let data = unsafe { &*(font_data as *const FontationsData) };
let font_ref = &data.font_ref;
let x_size = &data.x_size;
let y_size = &data.y_size;
let location = &data.location;
let x_glyph_metrics = font_ref.glyph_metrics(*x_size, location);
let y_glyph_metrics = font_ref.glyph_metrics(*y_size, location);
let x_glyph_metrics = &data.x_glyph_metrics.as_ref().unwrap();
let y_glyph_metrics = &data.y_glyph_metrics.as_ref().unwrap();
let glyph_id = GlyphId::new(glyph);
let x_extents = x_glyph_metrics.bounds(glyph_id);