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Refactor allocate_glyph_by_id to use ShapedGlyph struct

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Replace 5 loose parameters with a ShapedGlyph struct, removing the
need for #[expect(clippy::too_many_arguments)].
This commit is contained in:
gcailly
2026-03-27 13:19:16 +01:00
parent 210b54ad82
commit b2d549c78c
2 changed files with 30 additions and 31 deletions
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42
crates/epaint/src/text/font.rs
View File

@@ -623,41 +623,34 @@ impl FontFace {
shaper.shape(buffer, &[])
}
/// Allocate a glyph by its ID directly (from shaping output).
///
/// `shaper_y_offset_points` is the vertical offset from the shaper, already in points.
#[expect(clippy::too_many_arguments)]
/// Allocate a glyph by its ID directly, using metrics from the shaper.
pub fn allocate_glyph_by_id(
&mut self,
atlas: &mut TextureAtlas,
metrics: &StyledMetrics,
glyph_id: skrifa::GlyphId,
advance_width_px: f32,
h_pos: f32,
shaper_y_offset_points: f32,
is_cjk_glyph: bool,
shaped: &ShapedGlyph,
) -> (GlyphAllocation, i32) {
if glyph_id == skrifa::GlyphId::NOTDEF {
return (GlyphAllocation::default(), h_pos as i32);
if shaped.glyph_id == skrifa::GlyphId::NOTDEF {
return (GlyphAllocation::default(), shaped.h_pos as i32);
}
let (h_pos_round, bin) = if is_cjk_glyph {
(h_pos.round() as i32, SubpixelBin::Zero)
let (h_pos_round, bin) = if shaped.is_cjk {
(shaped.h_pos.round() as i32, SubpixelBin::Zero)
} else {
SubpixelBin::new(h_pos)
SubpixelBin::new(shaped.h_pos)
};
let cache_key = GlyphCacheKey::new(glyph_id, metrics, bin);
let cache_key = GlyphCacheKey::new(shaped.glyph_id, metrics, bin);
if let Some(cached) = self.glyph_alloc_cache.get(&cache_key) {
let mut alloc = *cached;
alloc.advance_width_px = advance_width_px;
alloc.uv_rect.offset.y += shaper_y_offset_points;
alloc.advance_width_px = shaped.advance_width_px;
alloc.uv_rect.offset.y += shaped.y_offset_points;
return (alloc, h_pos_round);
}
let glyph_info = GlyphInfo {
id: Some(glyph_id),
advance_width_unscaled: OrderedFloat(advance_width_px / metrics.px_scale_factor),
id: Some(shaped.glyph_id),
advance_width_unscaled: OrderedFloat(shaped.advance_width_px / metrics.px_scale_factor),
};
let mut allocation = self
@@ -670,7 +663,7 @@ impl FontFace {
// Apply shaper y_offset after caching — the offset varies per call site
// so we cache the base allocation without it.
allocation.uv_rect.offset.y += shaper_y_offset_points;
allocation.uv_rect.offset.y += shaped.y_offset_points;
(allocation, h_pos_round)
}
@@ -722,6 +715,15 @@ impl FontFace {
/// A contiguous run of text that maps to a single font face.
///
/// Glyph positioning info from the text shaper, ready for allocation.
pub(crate) struct ShapedGlyph {
pub glyph_id: skrifa::GlyphId,
pub advance_width_px: f32,
pub h_pos: f32,
pub y_offset_points: f32,
pub is_cjk: bool,
}
/// Produced by [`Font::segment_into_runs`] for text shaping.
#[derive(Debug)]
pub(crate) struct TextRun {

19
crates/epaint/src/text/text_layout.rs
View File

@@ -267,20 +267,17 @@ fn layout_shaped_run(
});
paragraph.cursor_x_px += glyph_alloc.advance_width_px;
} else {
let h_pos = paragraph.cursor_x_px + x_offset_px;
let y_offset_points = y_offset_px / ctx.pixels_per_point;
let shaped = super::font::ShapedGlyph {
glyph_id,
advance_width_px: x_advance_px,
h_pos: paragraph.cursor_x_px + x_offset_px,
y_offset_points: y_offset_px / ctx.pixels_per_point,
is_cjk: is_cjk(chr),
};
let (glyph_alloc, physical_x) =
if let Some(ff) = font.fonts_by_id.get_mut(&run.font_key) {
ff.allocate_glyph_by_id(
font.atlas,
face_metrics,
glyph_id,
x_advance_px,
h_pos,
y_offset_points,
is_cjk(chr),
)
ff.allocate_glyph_by_id(font.atlas, face_metrics, &shaped)
} else {
Default::default()
};