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Add function to get layout runs

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Jeremy Soller 2022-10-25 11:40:10 -06:00
parent 5603e30a29
commit 330a736136
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GPG key ID: 87F211AF2BE4C2FE
6 changed files with 254 additions and 238 deletions
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75
src/swash.rs
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@ -22,13 +22,8 @@ impl SwashCache {
}
/// Create a swash Image from a cache key, caching results
pub fn with_image<F: FnMut(&Option<SwashImage>)>(
&mut self,
matches: &FontMatches<'_>,
cache_key: CacheKey,
mut f: F
) {
let image_opt = self.cache.entry(cache_key).or_insert_with(|| {
pub fn get_image(&mut self, matches: &FontMatches<'_>, cache_key: CacheKey) -> &Option<SwashImage> {
self.cache.entry(cache_key).or_insert_with(|| {
let font = match matches.get_font(&cache_key.font_id) {
Some(some) => some,
None => {
@ -64,9 +59,7 @@ impl SwashCache {
.offset(offset)
// Render the image
.render(&mut scaler, cache_key.glyph_id)
});
f(image_opt);
})
}
/// Enumerate pixels in an Image, use `with_image` for better performance
@ -77,42 +70,40 @@ impl SwashCache {
base: u32,
mut f: F
) {
self.with_image(matches, cache_key, |image_opt| {
if let Some(image) = image_opt {
let x = image.placement.left;
let y = -image.placement.top;
if let Some(image) = self.get_image(matches, cache_key) {
let x = image.placement.left;
let y = -image.placement.top;
match image.content {
Content::Mask => {
let mut i = 0;
for off_y in 0..image.placement.height as i32 {
for off_x in 0..image.placement.width as i32 {
//TODO: blend base alpha?
let color = (image.data[i] as u32) << 24 | base & 0xFFFFFF;
f(x + off_x, y + off_y, color);
i += 1;
}
match image.content {
Content::Mask => {
let mut i = 0;
for off_y in 0..image.placement.height as i32 {
for off_x in 0..image.placement.width as i32 {
//TODO: blend base alpha?
let color = (image.data[i] as u32) << 24 | base & 0xFFFFFF;
f(x + off_x, y + off_y, color);
i += 1;
}
}
Content::Color => {
let mut i = 0;
for off_y in 0..image.placement.height as i32 {
for off_x in 0..image.placement.width as i32 {
//TODO: blend base alpha?
let color = (image.data[i + 3] as u32) << 24
| (image.data[i] as u32) << 16
| (image.data[i + 1] as u32) << 8
| (image.data[i + 2] as u32);
f(x + off_x, y + off_y, color);
i += 4;
}
}
}
Content::SubpixelMask => {
log::warn!("TODO: SubpixelMask");
}
}
Content::Color => {
let mut i = 0;
for off_y in 0..image.placement.height as i32 {
for off_x in 0..image.placement.width as i32 {
//TODO: blend base alpha?
let color = (image.data[i + 3] as u32) << 24
| (image.data[i] as u32) << 16
| (image.data[i + 1] as u32) << 8
| (image.data[i + 2] as u32);
f(x + off_x, y + off_y, color);
i += 4;
}
}
}
Content::SubpixelMask => {
log::warn!("TODO: SubpixelMask");
}
}
});
}
}
}