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authorLibravatar Héctor Ramón Jiménez <hector0193@gmail.com>2023-01-06 23:29:38 +0100
committerLibravatar Héctor Ramón Jiménez <hector0193@gmail.com>2023-02-24 13:17:58 +0100
commitb9a9576207ddfc7afd89da30b7cfc7ca0d7e335c (patch)
treec0b4489f1e547fc335e6b82025891cefdc671274 /glow/src/text.rs
parent573d27eb52bbfacf1b06983b4282f00eb5265bdc (diff)
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Remove `iced_glow`, `glyph-brush`, and `wgpu_glyph` dependencies
Diffstat (limited to 'glow/src/text.rs')
-rw-r--r--glow/src/text.rs257
1 files changed, 0 insertions, 257 deletions
diff --git a/glow/src/text.rs b/glow/src/text.rs
deleted file mode 100644
index 37ccdece..00000000
--- a/glow/src/text.rs
+++ /dev/null
@@ -1,257 +0,0 @@
-use crate::Transformation;
-
-use iced_graphics::font;
-
-use glow_glyph::ab_glyph;
-use std::{cell::RefCell, collections::HashMap};
-
-pub use iced_native::text::Hit;
-
-#[derive(Debug)]
-pub struct Pipeline {
- draw_brush: RefCell<glow_glyph::GlyphBrush>,
- draw_font_map: RefCell<HashMap<String, glow_glyph::FontId>>,
- measure_brush: RefCell<glyph_brush::GlyphBrush<()>>,
-}
-
-impl Pipeline {
- pub fn new(
- gl: &glow::Context,
- default_font: Option<&[u8]>,
- multithreading: bool,
- ) -> Self {
- let default_font = default_font.map(|slice| slice.to_vec());
-
- // TODO: Font customization
- #[cfg(feature = "default_system_font")]
- let default_font = {
- default_font.or_else(|| {
- font::Source::new()
- .load(&[font::Family::SansSerif, font::Family::Serif])
- .ok()
- })
- };
-
- let default_font =
- default_font.unwrap_or_else(|| font::FALLBACK.to_vec());
-
- 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..."
- );
-
- ab_glyph::FontArc::try_from_slice(font::FALLBACK)
- .expect("Load fallback font")
- });
-
- let draw_brush_builder =
- glow_glyph::GlyphBrushBuilder::using_font(font.clone())
- .initial_cache_size((2048, 2048))
- .draw_cache_multithread(multithreading);
-
- #[cfg(target_arch = "wasm32")]
- let draw_brush_builder = draw_brush_builder.draw_cache_align_4x4(true);
-
- let draw_brush = draw_brush_builder.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),
- }
- }
-
- pub fn queue(&mut self, section: glow_glyph::Section<'_>) {
- self.draw_brush.borrow_mut().queue(section);
- }
-
- pub fn draw_queued(
- &mut self,
- gl: &glow::Context,
- transformation: Transformation,
- region: glow_glyph::Region,
- ) {
- self.draw_brush
- .borrow_mut()
- .draw_queued_with_transform_and_scissoring(
- gl,
- transformation.into(),
- region,
- )
- .expect("Draw text");
- }
-
- pub fn measure(
- &self,
- content: &str,
- size: f32,
- font: iced_native::Font,
- bounds: iced_native::Size,
- ) -> (f32, f32) {
- use glow_glyph::GlyphCruncher;
-
- let glow_glyph::FontId(font_id) = self.find_font(font);
-
- let section = glow_glyph::Section {
- bounds: (bounds.width, bounds.height),
- text: vec![glow_glyph::Text {
- text: content,
- scale: size.into(),
- font_id: glow_glyph::FontId(font_id),
- extra: glow_glyph::Extra::default(),
- }],
- ..Default::default()
- };
-
- if let Some(bounds) =
- self.measure_brush.borrow_mut().glyph_bounds(section)
- {
- (bounds.width().ceil(), bounds.height().ceil())
- } else {
- (0.0, 0.0)
- }
- }
-
- pub fn hit_test(
- &self,
- content: &str,
- size: f32,
- font: iced_native::Font,
- bounds: iced_native::Size,
- point: iced_native::Point,
- nearest_only: bool,
- ) -> Option<Hit> {
- use glow_glyph::GlyphCruncher;
-
- let glow_glyph::FontId(font_id) = self.find_font(font);
-
- let section = glow_glyph::Section {
- bounds: (bounds.width, bounds.height),
- text: vec![glow_glyph::Text {
- text: content,
- scale: size.into(),
- font_id: glow_glyph::FontId(font_id),
- extra: glow_glyph::Extra::default(),
- }],
- ..Default::default()
- };
-
- let mut mb = self.measure_brush.borrow_mut();
-
- // The underlying type is FontArc, so clones are cheap.
- use ab_glyph::{Font, ScaleFont};
- let font = mb.fonts()[font_id].clone().into_scaled(size);
-
- // Implements an iterator over the glyph bounding boxes.
- let bounds = mb.glyphs(section).map(
- |glow_glyph::SectionGlyph {
- byte_index, glyph, ..
- }| {
- (
- *byte_index,
- iced_native::Rectangle::new(
- iced_native::Point::new(
- glyph.position.x - font.h_side_bearing(glyph.id),
- glyph.position.y - font.ascent(),
- ),
- iced_native::Size::new(
- font.h_advance(glyph.id),
- font.ascent() - font.descent(),
- ),
- ),
- )
- },
- );
-
- // Implements computation of the character index based on the byte index
- // within the input string.
- let char_index = |byte_index| {
- let mut b_count = 0;
- for (i, utf8_len) in
- content.chars().map(|c| c.len_utf8()).enumerate()
- {
- if byte_index < (b_count + utf8_len) {
- return i;
- }
- b_count += utf8_len;
- }
-
- byte_index
- };
-
- if !nearest_only {
- for (idx, bounds) in bounds.clone() {
- if bounds.contains(point) {
- return Some(Hit::CharOffset(char_index(idx)));
- }
- }
- }
-
- let nearest = bounds
- .map(|(index, bounds)| (index, bounds.center()))
- .min_by(|(_, center_a), (_, center_b)| {
- center_a
- .distance(point)
- .partial_cmp(&center_b.distance(point))
- .unwrap_or(std::cmp::Ordering::Greater)
- });
-
- nearest.map(|(idx, center)| {
- Hit::NearestCharOffset(char_index(idx), point - center)
- })
- }
-
- 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.
- // This makes stuff quite inconvenient. A manual method for trimming the
- // cache would make our lives easier.
- loop {
- let action = self
- .measure_brush
- .borrow_mut()
- .process_queued(|_, _| {}, |_| {});
-
- match action {
- Ok(_) => break,
- Err(glyph_brush::BrushError::TextureTooSmall { suggested }) => {
- let (width, height) = suggested;
-
- self.measure_brush
- .borrow_mut()
- .resize_texture(width, height);
- }
- }
- }
- }
-
- pub fn find_font(&self, font: iced_native::Font) -> glow_glyph::FontId {
- match font {
- iced_native::Font::Default => glow_glyph::FontId(0),
- iced_native::Font::External { name, bytes } => {
- if let Some(font_id) = self.draw_font_map.borrow().get(name) {
- return *font_id;
- }
-
- let font = ab_glyph::FontArc::try_from_slice(bytes)
- .expect("Load font");
-
- 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
- .borrow_mut()
- .insert(String::from(name), font_id);
-
- font_id
- }
- }
- }
-}