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[fontations] Do a bounds check

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This commit is contained in:
Behdad Esfahbod 2025-03-06 11:33:22 -07:00
parent 3ce6b720ac
commit 92af2e47fc
1 changed files with 3 additions and 2 deletions
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5
src/fontations/lib.rs
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@ -336,13 +336,14 @@ impl HbColorPainter {
}
fn lookup_color(&self, color_index: u16, alpha: f32) -> hb_color_t {
if color_index == 0xFFFF {
let c = self.color_records.get(color_index as usize);
if color_index == 0xFFFF || c.is_none() {
// Apply alpha to foreground color
((self.foreground & 0xFFFFFF00)
| (((self.foreground & 0xFF) as f32 * alpha).round() as u32))
as hb_color_t
} else {
let c = self.color_records[color_index as usize]; // TODO: bounds check
let c = c.unwrap();
(((c.blue as u32) << 24)
| ((c.green as u32) << 16)
| ((c.red as u32) << 8)