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macos-click-through
exoticus 5 years ago
parent ab38826b60
commit 9e6c41ac65
1 changed files with 112 additions and 134 deletions
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242
src/renderer/caching_shaper.rs
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@ -16,12 +16,14 @@ use log::{info, trace, warn};
const STANDARD_CHARACTER_STRING: &str =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
const MONOSPACE_FONT: &str = "Fira Code Regular Nerd Font Complete.otf";
const MONOSPACE_BOLD_FONT: &str = "Fira Code Bold Nerd Font Complete.otf";
const SYMBOL_FONT: &str = "DejaVuSansMono.ttf";
const EMOJI_FONT: &str = "NotoColorEmoji.ttf";
const WIDE_FONT: &str = "NotoSansMonoCJKjp-Regular.otf";
const WIDE_BOLD_FONT: &str = "NotoSansMonoCJKjp-Bold.otf";
#[cfg(target_os = "windows")]
const SYSTEM_DEFAULT_FONT: &str = "Consolas";
#[cfg(target_os = "linux")]
const SYSTEM_DEFAULT_FONT: &str = "Droid Sans Mono";
#[cfg(target_os = "macos")]
const SYSTEM_DEFAULT_FONT: &str = "Menlo";
#[cfg(target_os = "windows")]
const SYSTEM_SYMBOL_FONT: &str = "Segoe UI Symbol";
@ -41,6 +43,9 @@ const SYSTEM_EMOJI_FONT: &str = "Apple Color Emoji";
#[cfg(target_os = "linux")]
const SYSTEM_EMOJI_FONT: &str = "Noto Color Emoji";
const SYMBOL_FONT: &str = "Extra Symbols.otf";
const MISSING_GLYPHS_FONT: &str = "Missing Glyphs.otf";
#[cfg(feature = "embed-fonts")]
#[derive(RustEmbed)]
#[folder = "assets/fonts/"]
@ -55,44 +60,74 @@ struct ShapeKey {
pub italic: bool,
}
pub fn add_font_to_collection_by_name(
name: &str,
source: &SystemSource,
collection: &mut FontCollection,
) -> Option<()> {
source
.select_family_by_name(name)
.ok()
.and_then(|matching_fonts| matching_fonts.fonts()[0].load().ok())
.map(|font| collection.add_family(FontFamily::new_from_font(font)))
pub struct FontLoader {
cache: LruCache<String, FontCollection>,
}
#[cfg(feature = "embed-fonts")]
pub fn add_asset_font_to_collection(name: &str, collection: &mut FontCollection) -> Option<()> {
Asset::get(name)
.and_then(|font_data| Font::from_bytes(font_data.to_vec().into(), 0).ok())
.map(|font| collection.add_family(FontFamily::new_from_font(font)))
}
impl FontLoader {
pub fn new() -> FontLoader {
FontLoader {
cache: LruCache::new(10),
}
}
pub fn build_collection_by_font_name(
font_name: Option<&str>,
bold: bool,
italic: bool,
) -> FontCollection {
let source = SystemSource::new();
pub fn get(&mut self, font_name: &str) -> Option<&FontCollection> {
let nameref = &font_name.to_string();
if self.cache.contains(nameref) {
return self.cache.get(nameref);
}
None
}
pub fn load_all_variants(&mut self, font_name: &str) -> Option<&FontCollection> {
let nameref = &font_name.to_string();
if self.cache.contains(nameref) {
return self.cache.get(nameref);
}
let source = SystemSource::new();
let mut collection = FontCollection::new();
if let Some(font_name) = font_name {
let weight = if bold { Weight::BOLD } else { Weight::NORMAL };
source
.select_family_by_name(font_name)
.ok()
.map(|matching_fonts| {
let fonts = matching_fonts.fonts();
let style = if italic { Style::Italic } else { Style::Normal };
for font in fonts.into_iter() {
if let Some(font) = font.load().ok() {
// do something with this
let props: Properties = font.properties();
collection.add_family(FontFamily::new_from_font(font))
}
}
});
self.cache.put(font_name.to_string(), collection);
self.cache.get(nameref)
}
pub fn load(&mut self, font_name: &str, bold: bool, italic: bool) -> Option<&FontCollection> {
let nameref = &font_name.to_string();
if self.cache.contains(nameref) {
return self.cache.get(nameref);
}
let source = SystemSource::new();
let mut collection = FontCollection::new();
let weight = if bold { Weight::BOLD } else { Weight::NORMAL };
let style = if italic { Style::Italic } else { Style::Normal };
let properties = Properties {
weight,
style,
stretch: Stretch::NORMAL,
};
if let Ok(custom) =
source.select_best_match(&[FamilyName::Title(font_name.to_string())], &properties)
{
@ -103,79 +138,35 @@ pub fn build_collection_by_font_name(
collection.add_family(FontFamily::new_from_font(matching_font))
})
.unwrap_or_else(|| warn!("Could not load gui font"));
}
}
#[cfg(feature = "embed-fonts")]
{
let monospace_style = if bold {
MONOSPACE_BOLD_FONT
} else {
MONOSPACE_FONT
};
add_asset_font_to_collection(monospace_style, &mut collection)
.unwrap_or_else(|| warn!("Could not load embedded monospace font"));
self.cache.put(font_name.to_string(), collection);
}
if add_font_to_collection_by_name(SYSTEM_EMOJI_FONT, &source, &mut collection).is_none() {
#[cfg(feature = "embed-fonts")]
{
if cfg!(not(target_os = "macos"))
&& add_asset_font_to_collection(EMOJI_FONT, &mut collection).is_some()
{
info!("Fell back to embedded emoji font");
} else {
warn!("Could not load emoji font");
}
}
self.cache.get(nameref)
}
add_font_to_collection_by_name(SYSTEM_SYMBOL_FONT, &source, &mut collection)
.unwrap_or_else(|| warn!("Could not load system symbol font"));
#[cfg(feature = "embed-fonts")]
{
let wide_style = if bold { WIDE_BOLD_FONT } else { WIDE_FONT };
add_asset_font_to_collection(wide_style, &mut collection)
.unwrap_or_else(|| warn!("Could not load embedded wide font"));
pub fn load_from_asset(&mut self, font_name: &str) -> Option<&FontCollection> {
let mut collection = FontCollection::new();
let nameref = &font_name.to_string();
add_asset_font_to_collection(SYMBOL_FONT, &mut collection)
.unwrap_or_else(|| warn!("Could not load embedded symbol font"));
if self.cache.contains(nameref) {
return self.cache.get(nameref);
}
collection
}
struct FontSet {
normal: FontCollection,
bold: FontCollection,
italic: FontCollection,
}
impl FontSet {
fn new(font_name: Option<&str>) -> FontSet {
FontSet {
normal: build_collection_by_font_name(font_name, false, false),
bold: build_collection_by_font_name(font_name, true, false),
italic: build_collection_by_font_name(font_name, false, true),
}
}
Asset::get(font_name)
.and_then(|font_data| Font::from_bytes(font_data.to_vec().into(), 0).ok())
.map(|font| collection.add_family(FontFamily::new_from_font(font)));
fn get(&self, bold: bool, italic: bool) -> &FontCollection {
match (bold, italic) {
(true, _) => &self.bold,
(false, false) => &self.normal,
(false, true) => &self.italic,
}
self.cache.put(font_name.to_string(), collection);
self.cache.get(nameref)
}
}
pub struct CachingShaper {
pub font_name: Option<String>,
pub base_size: f32,
font_set: FontSet,
// font_set: FontSet,
font_loader: FontLoader,
font_cache: LruCache<String, SkiaFont>,
blob_cache: LruCache<ShapeKey, Vec<TextBlob>>,
}
@ -190,10 +181,15 @@ fn build_skia_font_from_skribo_font(skribo_font: &SkriboFont, base_size: f32) ->
impl CachingShaper {
pub fn new() -> CachingShaper {
let mut loader = FontLoader::new();
loader.load_all_variants(SYSTEM_DEFAULT_FONT);
CachingShaper {
font_name: None,
font_name: Some(String::from(SYSTEM_DEFAULT_FONT)),
base_size: DEFAULT_FONT_SIZE,
font_set: FontSet::new(None),
// font_set: FontSet::new(Some(SYSTEM_DEFAULT_FONT), &mut loader),
font_loader: loader,
font_cache: LruCache::new(10),
blob_cache: LruCache::new(10000),
}
@ -201,6 +197,7 @@ impl CachingShaper {
fn get_skia_font(&mut self, skribo_font: &SkriboFont) -> Option<&SkiaFont> {
let font_name = skribo_font.font.postscript_name()?;
if !self.font_cache.contains(&font_name) {
let font = build_skia_font_from_skribo_font(skribo_font, self.base_size)?;
self.font_cache.put(font_name.clone(), font);
@ -209,15 +206,14 @@ impl CachingShaper {
self.font_cache.get(&font_name)
}
fn metrics(&self) -> Metrics {
self.font_set
.normal
.itemize("a")
.next()
.unwrap()
.1
.font
.metrics()
fn metrics(&mut self) -> Option<Metrics> {
let var_name = self.font_name.clone().unwrap_or_default();
if let Some(font) = self.font_loader.get(&var_name) {
return Some(font.itemize("a").next().unwrap().1.font.metrics());
}
None
}
pub fn shape(&mut self, text: &str, bold: bool, italic: bool) -> Vec<TextBlob> {
@ -225,18 +221,18 @@ impl CachingShaper {
size: self.base_size,
};
let session = LayoutSession::create(text, &style, &self.font_set.get(bold, italic));
let metrics = self.metrics();
let var_name = self.font_name.clone().unwrap_or_default();
let font_collection = self.font_loader.get(&var_name).unwrap();
let session = LayoutSession::create(text, &style, font_collection);
let metrics = self.metrics().unwrap();
let ascent = metrics.ascent * self.base_size / metrics.units_per_em as f32;
let mut blobs = Vec::new();
for layout_run in session.iter_all() {
let skribo_font = layout_run.font();
if let Some(skia_font) = self.get_skia_font(&skribo_font) {
let mut blob_builder = TextBlobBuilder::new();
let count = layout_run.glyphs().count();
let (glyphs, positions) =
blob_builder.alloc_run_pos_h(&skia_font, count, ascent, None);
@ -245,6 +241,7 @@ impl CachingShaper {
glyphs[i] = glyph.glyph_id as u16;
positions[i] = glyph.offset.x;
}
blobs.push(blob_builder.make().unwrap());
} else {
warn!("Could not load scribo font");
@ -256,6 +253,7 @@ impl CachingShaper {
pub fn shape_cached(&mut self, text: &str, bold: bool, italic: bool) -> &Vec<TextBlob> {
let key = ShapeKey::new(text.to_string(), bold, italic);
if !self.blob_cache.contains(&key) {
let blobs = self.shape(text, bold, italic);
self.blob_cache.put(key.clone(), blobs);
@ -268,21 +266,23 @@ impl CachingShaper {
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);
}
}

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