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@ -16,12 +16,14 @@ use log::{info, trace, warn};
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const STANDARD_CHARACTER_STRING: &str =
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"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
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const MONOSPACE_FONT: &str = "Fira Code Regular Nerd Font Complete.otf";
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const MONOSPACE_BOLD_FONT: &str = "Fira Code Bold Nerd Font Complete.otf";
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const SYMBOL_FONT: &str = "DejaVuSansMono.ttf";
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const EMOJI_FONT: &str = "NotoColorEmoji.ttf";
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const WIDE_FONT: &str = "NotoSansMonoCJKjp-Regular.otf";
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const WIDE_BOLD_FONT: &str = "NotoSansMonoCJKjp-Bold.otf";
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#[cfg(target_os = "windows")]
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const SYSTEM_DEFAULT_FONT: &str = "Consolas";
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#[cfg(target_os = "linux")]
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const SYSTEM_DEFAULT_FONT: &str = "Droid Sans Mono";
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#[cfg(target_os = "macos")]
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const SYSTEM_DEFAULT_FONT: &str = "Menlo";
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#[cfg(target_os = "windows")]
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const SYSTEM_SYMBOL_FONT: &str = "Segoe UI Symbol";
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@ -41,6 +43,9 @@ const SYSTEM_EMOJI_FONT: &str = "Apple Color Emoji";
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#[cfg(target_os = "linux")]
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const SYSTEM_EMOJI_FONT: &str = "Noto Color Emoji";
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const SYMBOL_FONT: &str = "Extra Symbols.otf";
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const MISSING_GLYPHS_FONT: &str = "Missing Glyphs.otf";
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#[cfg(feature = "embed-fonts")]
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#[derive(RustEmbed)]
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#[folder = "assets/fonts/"]
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@ -55,44 +60,74 @@ struct ShapeKey {
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pub italic: bool,
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}
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pub fn add_font_to_collection_by_name(
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name: &str,
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source: &SystemSource,
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collection: &mut FontCollection,
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) -> Option<()> {
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source
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.select_family_by_name(name)
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.ok()
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.and_then(|matching_fonts| matching_fonts.fonts()[0].load().ok())
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.map(|font| collection.add_family(FontFamily::new_from_font(font)))
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pub struct FontLoader {
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cache: LruCache<String, FontCollection>,
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}
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#[cfg(feature = "embed-fonts")]
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pub fn add_asset_font_to_collection(name: &str, collection: &mut FontCollection) -> Option<()> {
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Asset::get(name)
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.and_then(|font_data| Font::from_bytes(font_data.to_vec().into(), 0).ok())
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.map(|font| collection.add_family(FontFamily::new_from_font(font)))
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}
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impl FontLoader {
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pub fn new() -> FontLoader {
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FontLoader {
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cache: LruCache::new(10),
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}
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}
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pub fn build_collection_by_font_name(
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font_name: Option<&str>,
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bold: bool,
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italic: bool,
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) -> FontCollection {
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let source = SystemSource::new();
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pub fn get(&mut self, font_name: &str) -> Option<&FontCollection> {
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let nameref = &font_name.to_string();
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let mut collection = FontCollection::new();
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if self.cache.contains(nameref) {
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return self.cache.get(nameref);
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}
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if let Some(font_name) = font_name {
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let weight = if bold { Weight::BOLD } else { Weight::NORMAL };
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None
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}
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let style = if italic { Style::Italic } else { Style::Normal };
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pub fn load_all_variants(&mut self, font_name: &str) -> Option<&FontCollection> {
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let nameref = &font_name.to_string();
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if self.cache.contains(nameref) {
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return self.cache.get(nameref);
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}
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let source = SystemSource::new();
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let mut collection = FontCollection::new();
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source
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.select_family_by_name(font_name)
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.ok()
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.map(|matching_fonts| {
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let fonts = matching_fonts.fonts();
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for font in fonts.into_iter() {
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if let Some(font) = font.load().ok() {
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// do something with this
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let props: Properties = font.properties();
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collection.add_family(FontFamily::new_from_font(font))
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}
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}
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});
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self.cache.put(font_name.to_string(), collection);
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self.cache.get(nameref)
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}
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pub fn load(&mut self, font_name: &str, bold: bool, italic: bool) -> Option<&FontCollection> {
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let nameref = &font_name.to_string();
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if self.cache.contains(nameref) {
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return self.cache.get(nameref);
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}
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let source = SystemSource::new();
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let mut collection = FontCollection::new();
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let weight = if bold { Weight::BOLD } else { Weight::NORMAL };
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let style = if italic { Style::Italic } else { Style::Normal };
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let properties = Properties {
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weight,
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style,
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stretch: Stretch::NORMAL,
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};
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if let Ok(custom) =
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source.select_best_match(&[FamilyName::Title(font_name.to_string())], &properties)
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{
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@ -103,79 +138,35 @@ pub fn build_collection_by_font_name(
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collection.add_family(FontFamily::new_from_font(matching_font))
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})
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.unwrap_or_else(|| warn!("Could not load gui font"));
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}
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}
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#[cfg(feature = "embed-fonts")]
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{
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let monospace_style = if bold {
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MONOSPACE_BOLD_FONT
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} else {
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MONOSPACE_FONT
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};
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add_asset_font_to_collection(monospace_style, &mut collection)
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.unwrap_or_else(|| warn!("Could not load embedded monospace font"));
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}
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if add_font_to_collection_by_name(SYSTEM_EMOJI_FONT, &source, &mut collection).is_none() {
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#[cfg(feature = "embed-fonts")]
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{
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if cfg!(not(target_os = "macos"))
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&& add_asset_font_to_collection(EMOJI_FONT, &mut collection).is_some()
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{
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info!("Fell back to embedded emoji font");
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} else {
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warn!("Could not load emoji font");
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}
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self.cache.put(font_name.to_string(), collection);
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}
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}
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add_font_to_collection_by_name(SYSTEM_SYMBOL_FONT, &source, &mut collection)
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.unwrap_or_else(|| warn!("Could not load system symbol font"));
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#[cfg(feature = "embed-fonts")]
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{
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let wide_style = if bold { WIDE_BOLD_FONT } else { WIDE_FONT };
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add_asset_font_to_collection(wide_style, &mut collection)
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.unwrap_or_else(|| warn!("Could not load embedded wide font"));
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add_asset_font_to_collection(SYMBOL_FONT, &mut collection)
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.unwrap_or_else(|| warn!("Could not load embedded symbol font"));
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self.cache.get(nameref)
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}
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collection
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}
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struct FontSet {
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normal: FontCollection,
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bold: FontCollection,
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italic: FontCollection,
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}
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pub fn load_from_asset(&mut self, font_name: &str) -> Option<&FontCollection> {
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let mut collection = FontCollection::new();
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let nameref = &font_name.to_string();
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impl FontSet {
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fn new(font_name: Option<&str>) -> FontSet {
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FontSet {
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normal: build_collection_by_font_name(font_name, false, false),
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bold: build_collection_by_font_name(font_name, true, false),
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italic: build_collection_by_font_name(font_name, false, true),
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if self.cache.contains(nameref) {
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return self.cache.get(nameref);
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}
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}
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fn get(&self, bold: bool, italic: bool) -> &FontCollection {
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match (bold, italic) {
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(true, _) => &self.bold,
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(false, false) => &self.normal,
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(false, true) => &self.italic,
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}
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Asset::get(font_name)
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.and_then(|font_data| Font::from_bytes(font_data.to_vec().into(), 0).ok())
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.map(|font| collection.add_family(FontFamily::new_from_font(font)));
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self.cache.put(font_name.to_string(), collection);
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self.cache.get(nameref)
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}
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}
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pub struct CachingShaper {
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pub font_name: Option<String>,
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pub base_size: f32,
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font_set: FontSet,
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// font_set: FontSet,
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font_loader: FontLoader,
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font_cache: LruCache<String, SkiaFont>,
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blob_cache: LruCache<ShapeKey, Vec<TextBlob>>,
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}
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@ -190,10 +181,15 @@ fn build_skia_font_from_skribo_font(skribo_font: &SkriboFont, base_size: f32) ->
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impl CachingShaper {
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pub fn new() -> CachingShaper {
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let mut loader = FontLoader::new();
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loader.load_all_variants(SYSTEM_DEFAULT_FONT);
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CachingShaper {
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font_name: None,
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font_name: Some(String::from(SYSTEM_DEFAULT_FONT)),
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base_size: DEFAULT_FONT_SIZE,
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font_set: FontSet::new(None),
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// font_set: FontSet::new(Some(SYSTEM_DEFAULT_FONT), &mut loader),
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font_loader: loader,
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font_cache: LruCache::new(10),
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blob_cache: LruCache::new(10000),
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}
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@ -201,6 +197,7 @@ impl CachingShaper {
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fn get_skia_font(&mut self, skribo_font: &SkriboFont) -> Option<&SkiaFont> {
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let font_name = skribo_font.font.postscript_name()?;
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if !self.font_cache.contains(&font_name) {
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let font = build_skia_font_from_skribo_font(skribo_font, self.base_size)?;
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self.font_cache.put(font_name.clone(), font);
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@ -209,15 +206,14 @@ impl CachingShaper {
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self.font_cache.get(&font_name)
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}
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fn metrics(&self) -> Metrics {
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self.font_set
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.normal
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.itemize("a")
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.next()
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.unwrap()
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.1
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.font
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.metrics()
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fn metrics(&mut self) -> Option<Metrics> {
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let var_name = self.font_name.clone().unwrap_or_default();
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if let Some(font) = self.font_loader.get(&var_name) {
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return Some(font.itemize("a").next().unwrap().1.font.metrics());
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}
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None
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}
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pub fn shape(&mut self, text: &str, bold: bool, italic: bool) -> Vec<TextBlob> {
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@ -225,18 +221,18 @@ impl CachingShaper {
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size: self.base_size,
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};
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let session = LayoutSession::create(text, &style, &self.font_set.get(bold, italic));
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let metrics = self.metrics();
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let var_name = self.font_name.clone().unwrap_or_default();
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let font_collection = self.font_loader.get(&var_name).unwrap();
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let session = LayoutSession::create(text, &style, font_collection);
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let metrics = self.metrics().unwrap();
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let ascent = metrics.ascent * self.base_size / metrics.units_per_em as f32;
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let mut blobs = Vec::new();
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for layout_run in session.iter_all() {
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let skribo_font = layout_run.font();
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if let Some(skia_font) = self.get_skia_font(&skribo_font) {
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let mut blob_builder = TextBlobBuilder::new();
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let count = layout_run.glyphs().count();
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let (glyphs, positions) =
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blob_builder.alloc_run_pos_h(&skia_font, count, ascent, None);
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@ -245,6 +241,7 @@ impl CachingShaper {
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glyphs[i] = glyph.glyph_id as u16;
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positions[i] = glyph.offset.x;
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}
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blobs.push(blob_builder.make().unwrap());
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} else {
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warn!("Could not load scribo font");
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|
|
@ -256,6 +253,7 @@ impl CachingShaper {
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pub fn shape_cached(&mut self, text: &str, bold: bool, italic: bool) -> &Vec<TextBlob> {
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let key = ShapeKey::new(text.to_string(), bold, italic);
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if !self.blob_cache.contains(&key) {
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|
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|
let blobs = self.shape(text, bold, italic);
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|
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|
self.blob_cache.put(key.clone(), blobs);
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|
|
@ -268,21 +266,23 @@ impl CachingShaper {
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|
|
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trace!("Font changed {:?} {:?}", &font_name, &base_size);
|
|
|
|
|
self.font_name = font_name.map(|name| name.to_string());
|
|
|
|
|
self.base_size = base_size.unwrap_or(DEFAULT_FONT_SIZE);
|
|
|
|
|
self.font_set = FontSet::new(font_name);
|
|
|
|
|
self.font_loader
|
|
|
|
|
.load(font_name.unwrap_or_default(), false, false);
|
|
|
|
|
self.font_cache.clear();
|
|
|
|
|
self.blob_cache.clear();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
pub fn font_base_dimensions(&mut self) -> (f32, f32) {
|
|
|
|
|
let metrics = self.metrics();
|
|
|
|
|
let var_name = self.font_name.clone().unwrap_or_default();
|
|
|
|
|
let metrics = self.metrics().unwrap();
|
|
|
|
|
let font_collection = self.font_loader.get(&var_name).unwrap();
|
|
|
|
|
let font_height =
|
|
|
|
|
(metrics.ascent - metrics.descent) * self.base_size / metrics.units_per_em as f32;
|
|
|
|
|
|
|
|
|
|
let style = TextStyle {
|
|
|
|
|
size: self.base_size,
|
|
|
|
|
};
|
|
|
|
|
let session =
|
|
|
|
|
LayoutSession::create(STANDARD_CHARACTER_STRING, &style, &self.font_set.normal);
|
|
|
|
|
let session = LayoutSession::create(STANDARD_CHARACTER_STRING, &style, font_collection);
|
|
|
|
|
|
|
|
|
|
let layout_run = session.iter_all().next().unwrap();
|
|
|
|
|
let glyph_offsets: Vec<f32> = layout_run.glyphs().map(|glyph| glyph.offset.x).collect();
|
|
|
|
@ -305,29 +305,7 @@ impl CachingShaper {
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
pub fn underline_position(&mut self) -> f32 {
|
|
|
|
|
let metrics = self.metrics();
|
|
|
|
|
let metrics = self.metrics().unwrap();
|
|
|
|
|
-metrics.underline_position * self.base_size / metrics.units_per_em as f32
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#[cfg(test)]
|
|
|
|
|
mod tests {
|
|
|
|
|
use super::*;
|
|
|
|
|
use font_kit::source::SystemSource;
|
|
|
|
|
use skribo::FontCollection;
|
|
|
|
|
|
|
|
|
|
#[test]
|
|
|
|
|
fn unmatched_font_returns_nothing() {
|
|
|
|
|
assert!(add_font_to_collection_by_name(
|
|
|
|
|
"Foobar",
|
|
|
|
|
&SystemSource::new(),
|
|
|
|
|
&mut FontCollection::new()
|
|
|
|
|
)
|
|
|
|
|
.is_none());
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#[test]
|
|
|
|
|
fn build_font_collection_works() {
|
|
|
|
|
build_collection_by_font_name(None, true, true);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|