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Update glyph_brush and glow_glyph

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This commit is contained in:
Héctor Ramón Jiménez 2020-05-27 23:09:27 +02:00
parent 22ced3485e
commit 823ea15732
7 changed files with 41 additions and 86 deletions
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69
glow/src/text.rs
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@ -1,13 +1,13 @@
use crate::Transformation;
use glow_glyph::ab_glyph;
use iced_graphics::font;
use std::{cell::RefCell, collections::HashMap};
#[derive(Debug)]
pub struct Pipeline {
draw_brush: RefCell<glow_glyph::GlyphBrush<'static>>,
draw_brush: RefCell<glow_glyph::GlyphBrush>,
draw_font_map: RefCell<HashMap<String, glow_glyph::FontId>>,
measure_brush: RefCell<glyph_brush::GlyphBrush<'static, ()>>,
measure_brush: RefCell<glyph_brush::GlyphBrush<()>>,
}
impl Pipeline {
@ -22,36 +22,29 @@ impl Pipeline {
.unwrap_or_else(|_| font::FALLBACK.to_vec())
});
let load_glyph_brush = |font: Vec<u8>| {
let builder =
glow_glyph::GlyphBrushBuilder::using_fonts_bytes(vec![
font.clone()
])?;
Ok((
builder,
glyph_brush::GlyphBrushBuilder::using_font_bytes(font).build(),
))
};
let (brush_builder, measure_brush) = load_glyph_brush(default_font)
.unwrap_or_else(|_: glow_glyph::rusttype::Error| {
let font = ab_glyph::FontArc::try_from_vec(default_font)
.unwrap_or_else(|_| {
log::warn!(
"System font failed to load. \
Falling back to embedded font..."
"System font failed to load. Falling back to \
embedded font..."
);
load_glyph_brush(font::FALLBACK.to_vec())
ab_glyph::FontArc::try_from_slice(font::FALLBACK)
.expect("Load fallback font")
});
let draw_brush =
brush_builder.initial_cache_size((2048, 2048)).build(gl);
glow_glyph::GlyphBrushBuilder::using_font(font.clone())
.initial_cache_size((2048, 2048))
.draw_cache_multithread(false) // TODO: Expose as a configuration flag
.build(&gl);
let measure_brush =
glyph_brush::GlyphBrushBuilder::using_font(font).build();
Pipeline {
draw_brush: RefCell::new(draw_brush),
draw_font_map: RefCell::new(HashMap::new()),
measure_brush: RefCell::new(measure_brush),
}
}
@ -88,10 +81,13 @@ impl Pipeline {
let glow_glyph::FontId(font_id) = self.find_font(font);
let section = glow_glyph::Section {
text: content,
scale: glow_glyph::Scale { x: size, y: size },
bounds: (bounds.width, bounds.height),
font_id: glow_glyph::FontId(font_id),
text: vec![glow_glyph::Text {
text: content,
scale: size.into(),
font_id: glow_glyph::FontId(font_id),
extra: glow_glyph::Extra::default(),
}],
..Default::default()
};
@ -104,20 +100,6 @@ impl Pipeline {
}
}
pub fn space_width(&self, size: f32) -> f32 {
use glow_glyph::GlyphCruncher;
let glyph_brush = self.measure_brush.borrow();
// TODO: Select appropriate font
let font = &glyph_brush.fonts()[0];
font.glyph(' ')
.scaled(glow_glyph::Scale { x: size, y: size })
.h_metrics()
.advance_width
}
pub fn trim_measurement_cache(&mut self) {
// TODO: We should probably use a `GlyphCalculator` for this. However,
// it uses a lifetimed `GlyphCalculatorGuard` with side-effects on drop.
@ -150,11 +132,12 @@ impl Pipeline {
return *font_id;
}
// TODO: Find a way to share font data
let _ = self.measure_brush.borrow_mut().add_font_bytes(bytes);
let font = ab_glyph::FontArc::try_from_slice(bytes)
.expect("Load font");
let font_id =
self.draw_brush.borrow_mut().add_font_bytes(bytes);
let _ = self.measure_brush.borrow_mut().add_font(font.clone());
let font_id = self.draw_brush.borrow_mut().add_font(font);
let _ = self
.draw_font_map