125 lines
3.7 KiB
Rust
125 lines
3.7 KiB
Rust
use std::{
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collections::{hash_map::DefaultHasher, BTreeMap},
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hash::{Hash, Hasher},
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sync::Arc,
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};
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use parking_lot::Mutex;
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use crate::{
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font::Font,
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texture_atlas::{Texture, TextureAtlas},
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};
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/// TODO: rename
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#[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd, Serialize)]
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pub enum TextStyle {
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Body,
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Button,
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Heading,
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Monospace,
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}
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#[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd, Serialize)]
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pub enum FontFamily {
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Monospace,
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VariableWidth,
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}
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pub type FontDefinitions = BTreeMap<TextStyle, (FontFamily, f32)>;
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pub fn default_font_definitions() -> FontDefinitions {
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let mut definitions = FontDefinitions::new();
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definitions.insert(TextStyle::Body, (FontFamily::VariableWidth, 16.0));
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definitions.insert(TextStyle::Button, (FontFamily::VariableWidth, 18.0));
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definitions.insert(TextStyle::Heading, (FontFamily::VariableWidth, 28.0));
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definitions.insert(TextStyle::Monospace, (FontFamily::Monospace, 13.0));
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definitions
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}
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pub struct Fonts {
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pixels_per_point: f32,
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definitions: FontDefinitions,
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fonts: BTreeMap<TextStyle, Font>,
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texture: Texture,
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}
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impl Fonts {
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pub fn new(pixels_per_point: f32) -> Fonts {
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Fonts::from_definitions(default_font_definitions(), pixels_per_point)
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}
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pub fn from_definitions(definitions: FontDefinitions, pixels_per_point: f32) -> Fonts {
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let mut fonts = Fonts {
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pixels_per_point,
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definitions: Default::default(),
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fonts: Default::default(),
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texture: Default::default(),
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};
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fonts.set_sizes(definitions);
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fonts
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}
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pub fn definitions(&self) -> &FontDefinitions {
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&self.definitions
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}
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pub fn set_sizes(&mut self, definitions: FontDefinitions) {
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if self.definitions == definitions {
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return;
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}
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let mut atlas = TextureAtlas::new(512, 8); // TODO: better default?
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// Make the top left four pixels fully white:
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let pos = atlas.allocate((2, 2));
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assert_eq!(pos, (0, 0));
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atlas.texture_mut()[(0, 0)] = 255;
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atlas.texture_mut()[(0, 1)] = 255;
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atlas.texture_mut()[(1, 0)] = 255;
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atlas.texture_mut()[(1, 1)] = 255;
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let atlas = Arc::new(Mutex::new(atlas));
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// TODO: figure out a way to make the wasm smaller despite including a font. Zip it?
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let monospae_typeface_data = include_bytes!("../fonts/ProggyClean.ttf"); // Use 13 for this. NOTHING ELSE.
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// let monospae_typeface_data = include_bytes!("../fonts/Roboto-Regular.ttf");
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let variable_typeface_data = include_bytes!("../fonts/Comfortaa-Regular.ttf");
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// let variable_typeface_data = include_bytes!("../fonts/DejaVuSans.ttf");
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self.definitions = definitions.clone();
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self.fonts = definitions
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.into_iter()
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.map(|(text_style, (family, size))| {
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let typeface_data: &[u8] = match family {
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FontFamily::Monospace => monospae_typeface_data,
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FontFamily::VariableWidth => variable_typeface_data,
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};
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(
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text_style,
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Font::new(atlas.clone(), typeface_data, size, self.pixels_per_point),
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)
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})
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.collect();
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self.texture = atlas.lock().texture().clone();
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let mut hasher = DefaultHasher::new();
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self.texture.pixels.hash(&mut hasher);
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self.texture.id = hasher.finish();
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}
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pub fn texture(&self) -> &Texture {
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&self.texture
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}
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}
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impl std::ops::Index<TextStyle> for Fonts {
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type Output = Font;
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fn index(&self, text_style: TextStyle) -> &Font {
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&self.fonts[&text_style]
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}
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}
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