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Clear sprite cache when scale factor changes

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This commit is contained in:
Max Brunsfeld 2021-11-22 16:47:51 -08:00
parent 23fbeaf978
commit 4002be882f
3 changed files with 31 additions and 10 deletions
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16
crates/gpui/src/platform/mac/sprite_cache.rs
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@ -12,7 +12,6 @@ use std::{borrow::Cow, collections::HashMap, sync::Arc};
struct GlyphDescriptor {
font_id: FontId,
font_size: OrderedFloat<f32>,
scale_factor: OrderedFloat<f32>,
glyph_id: GlyphId,
subpixel_variant: (u8, u8),
}
@ -44,12 +43,14 @@ pub struct SpriteCache {
atlases: AtlasAllocator,
glyphs: HashMap<GlyphDescriptor, Option<GlyphSprite>>,
icons: HashMap<IconDescriptor, IconSprite>,
scale_factor: f32,
}
impl SpriteCache {
pub fn new(
device: metal::Device,
size: Vector2I,
scale_factor: f32,
fonts: Arc<dyn platform::FontSystem>,
) -> Self {
let descriptor = TextureDescriptor::new();
@ -61,19 +62,29 @@ impl SpriteCache {
atlases: AtlasAllocator::new(device, descriptor),
glyphs: Default::default(),
icons: Default::default(),
scale_factor,
}
}
pub fn set_scale_factor(&mut self, scale_factor: f32) {
if scale_factor != self.scale_factor {
self.icons.clear();
self.glyphs.clear();
self.atlases.clear();
}
self.scale_factor = scale_factor;
}
pub fn render_glyph(
&mut self,
font_id: FontId,
font_size: f32,
glyph_id: GlyphId,
target_position: Vector2F,
scale_factor: f32,
) -> Option<GlyphSprite> {
const SUBPIXEL_VARIANTS: u8 = 4;
let scale_factor = self.scale_factor;
let target_position = target_position * scale_factor;
let fonts = &self.fonts;
let atlases = &mut self.atlases;
@ -87,7 +98,6 @@ impl SpriteCache {
.entry(GlyphDescriptor {
font_id,
font_size: OrderedFloat(font_size),
scale_factor: OrderedFloat(scale_factor),
glyph_id,
subpixel_variant,
})