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[fontations] Cache OutlineGlyphCollection

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As advised by Chad.  Speeds up drawing benchmark 2x.
This commit is contained in:
Behdad Esfahbod 2025-03-04 19:12:37 -07:00 • committed by Khaled Hosny
parent c4932fa57a
commit 3f57f76e99
1 changed files with 14 additions and 10 deletions
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24
src/fontations/lib.rs
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@ -12,6 +12,7 @@ use skrifa::font::FontRef;
use skrifa::instance::{Location, NormalizedCoord, Size};
use skrifa::outline::pen::OutlinePen;
use skrifa::outline::DrawSettings;
use skrifa::OutlineGlyphCollection;
use skrifa::{GlyphId, MetadataProvider};
// A struct for storing your “fontations” data
@ -23,6 +24,7 @@ struct FontationsData {
x_size: Size,
y_size: Size,
location: Location,
outline_glyphs: OutlineGlyphCollection<'static>,
}
extern "C" fn _hb_fontations_data_destroy(font_data: *mut c_void) {
@ -244,13 +246,12 @@ extern "C" fn _hb_fontations_draw_glyph(
_user_data: *mut ::std::os::raw::c_void,
) {
let data = unsafe { &*(font_data as *const FontationsData) };
let font_ref = &data.font_ref;
let x_size = &data.x_size;
let location = &data.location;
let outline_glyphs = &data.outline_glyphs;
// Create an outline-glyph
let glyph_id = GlyphId::new(glyph as u32);
let outline_glyphs = font_ref.outline_glyphs();
let outline_glyph = outline_glyphs.get(glyph_id);
if outline_glyph.is_none() {
return;
@ -347,14 +348,6 @@ pub extern "C" fn hb_fontations_font_set_funcs(font: *mut hb_font_t) {
let char_map = Charmap::new(&font_ref);
let mut num_coords: u32 = 0;
let coords = unsafe { hb_font_get_var_coords_normalized(font, &mut num_coords) };
let mut location = Location::new(num_coords as usize);
let coords_mut = location.coords_mut();
for i in 0..num_coords as usize {
coords_mut[i] = NormalizedCoord::from_bits(unsafe { *coords.offset(i as isize) } as i16);
}
let mut x_scale: i32 = 0;
let mut y_scale: i32 = 0;
unsafe {
@ -363,6 +356,16 @@ pub extern "C" fn hb_fontations_font_set_funcs(font: *mut hb_font_t) {
let x_size = Size::new(x_scale as f32);
let y_size = Size::new(y_scale as f32);
let mut num_coords: u32 = 0;
let coords = unsafe { hb_font_get_var_coords_normalized(font, &mut num_coords) };
let mut location = Location::new(num_coords as usize);
let coords_mut = location.coords_mut();
for i in 0..num_coords as usize {
coords_mut[i] = NormalizedCoord::from_bits(unsafe { *coords.offset(i as isize) } as i16);
}
let outline_glyphs = font_ref.outline_glyphs();
let data = Box::new(FontationsData {
face_blob,
font_ref,
@ -370,6 +373,7 @@ pub extern "C" fn hb_fontations_font_set_funcs(font: *mut hb_font_t) {
x_size,
y_size,
location,
outline_glyphs,
});
let data_ptr = Box::into_raw(data) as *mut c_void;