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-rw-r--r--font/src/ft/fc/char_set.rs70
-rw-r--r--font/src/ft/fc/config.rs29
-rw-r--r--font/src/ft/fc/font_set.rs87
-rw-r--r--font/src/ft/fc/mod.rs337
-rw-r--r--font/src/ft/fc/object_set.rs48
-rw-r--r--font/src/ft/fc/pattern.rs627
-rw-r--r--font/src/ft/mod.rs787
7 files changed, 0 insertions, 1985 deletions
diff --git a/font/src/ft/fc/char_set.rs b/font/src/ft/fc/char_set.rs
deleted file mode 100644
index 9579b7b9..00000000
--- a/font/src/ft/fc/char_set.rs
+++ /dev/null
@@ -1,70 +0,0 @@
-use std::ptr::NonNull;
-
-use foreign_types::{foreign_type, ForeignType, ForeignTypeRef};
-
-use super::ffi::FcCharSetCreate;
-use super::ffi::{
- FcBool, FcCharSet, FcCharSetAddChar, FcCharSetCopy, FcCharSetCount, FcCharSetDestroy,
- FcCharSetHasChar, FcCharSetMerge, FcCharSetSubtract, FcCharSetUnion,
-};
-
-foreign_type! {
- pub unsafe type CharSet {
- type CType = FcCharSet;
- fn drop = FcCharSetDestroy;
- fn clone = FcCharSetCopy;
- }
-}
-
-impl CharSet {
- pub fn new() -> Self {
- Self::default()
- }
-}
-
-impl Default for CharSet {
- fn default() -> Self {
- CharSet(unsafe { NonNull::new(FcCharSetCreate()).unwrap() })
- }
-}
-
-impl CharSetRef {
- pub fn add(&mut self, glyph: char) -> bool {
- unsafe { FcCharSetAddChar(self.as_ptr(), glyph as _) == 1 }
- }
-
- pub fn has_char(&self, glyph: char) -> bool {
- unsafe { FcCharSetHasChar(self.as_ptr(), glyph as _) == 1 }
- }
-
- pub fn count(&self) -> u32 {
- unsafe { FcCharSetCount(self.as_ptr()) as u32 }
- }
-
- pub fn union(&self, other: &CharSetRef) -> CharSet {
- unsafe {
- let ptr = FcCharSetUnion(self.as_ptr() as _, other.as_ptr() as _);
- CharSet::from_ptr(ptr)
- }
- }
-
- pub fn subtract(&self, other: &CharSetRef) -> CharSet {
- unsafe {
- let ptr = FcCharSetSubtract(self.as_ptr() as _, other.as_ptr() as _);
- CharSet::from_ptr(ptr)
- }
- }
-
- pub fn merge(&self, other: &CharSetRef) -> Result<bool, ()> {
- unsafe {
- // Value is just an indicator whether something was added or not.
- let mut value: FcBool = 0;
- let res = FcCharSetMerge(self.as_ptr() as _, other.as_ptr() as _, &mut value);
- if res == 0 {
- Err(())
- } else {
- Ok(value != 0)
- }
- }
- }
-}
diff --git a/font/src/ft/fc/config.rs b/font/src/ft/fc/config.rs
deleted file mode 100644
index ac87a284..00000000
--- a/font/src/ft/fc/config.rs
+++ /dev/null
@@ -1,29 +0,0 @@
-use foreign_types::{foreign_type, ForeignTypeRef};
-
-use super::ffi::{FcConfig, FcConfigDestroy, FcConfigGetCurrent, FcConfigGetFonts};
-use super::{FontSetRef, SetName};
-
-foreign_type! {
- pub unsafe type Config {
- type CType = FcConfig;
- fn drop = FcConfigDestroy;
- }
-}
-
-impl Config {
- /// Get the current configuration.
- pub fn get_current() -> &'static ConfigRef {
- unsafe { ConfigRef::from_ptr(FcConfigGetCurrent()) }
- }
-}
-
-impl ConfigRef {
- /// Returns one of the two sets of fonts from the configuration as
- /// specified by `set`.
- pub fn get_fonts(&self, set: SetName) -> &FontSetRef {
- unsafe {
- let ptr = FcConfigGetFonts(self.as_ptr(), set as u32);
- FontSetRef::from_ptr(ptr)
- }
- }
-}
diff --git a/font/src/ft/fc/font_set.rs b/font/src/ft/fc/font_set.rs
deleted file mode 100644
index 2f003312..00000000
--- a/font/src/ft/fc/font_set.rs
+++ /dev/null
@@ -1,87 +0,0 @@
-use std::ops::Deref;
-use std::ptr::NonNull;
-
-use foreign_types::{foreign_type, ForeignType, ForeignTypeRef};
-use log::trace;
-
-use super::{ConfigRef, ObjectSetRef, PatternRef};
-
-use super::ffi::{FcFontSet, FcFontSetDestroy, FcFontSetList};
-
-foreign_type! {
- pub unsafe type FontSet {
- type CType = FcFontSet;
- fn drop = FcFontSetDestroy;
- }
-}
-
-impl FontSet {
- pub fn list(
- config: &ConfigRef,
- source: &mut FontSetRef,
- pattern: &PatternRef,
- objects: &ObjectSetRef,
- ) -> FontSet {
- let raw = unsafe {
- FcFontSetList(
- config.as_ptr(),
- &mut source.as_ptr(),
- 1, // nsets.
- pattern.as_ptr(),
- objects.as_ptr(),
- )
- };
- FontSet(NonNull::new(raw).unwrap())
- }
-}
-
-/// Iterator over a font set.
-pub struct Iter<'a> {
- font_set: &'a FontSetRef,
- num_fonts: usize,
- current: usize,
-}
-
-impl<'a> IntoIterator for &'a FontSet {
- type IntoIter = Iter<'a>;
- type Item = &'a PatternRef;
-
- fn into_iter(self) -> Iter<'a> {
- let num_fonts = unsafe { (*self.as_ptr()).nfont as isize };
-
- trace!("Number of fonts is {}", num_fonts);
-
- Iter { font_set: self.deref(), num_fonts: num_fonts as _, current: 0 }
- }
-}
-
-impl<'a> IntoIterator for &'a FontSetRef {
- type IntoIter = Iter<'a>;
- type Item = &'a PatternRef;
-
- fn into_iter(self) -> Iter<'a> {
- let num_fonts = unsafe { (*self.as_ptr()).nfont as isize };
-
- trace!("Number of fonts is {}", num_fonts);
-
- Iter { font_set: self, num_fonts: num_fonts as _, current: 0 }
- }
-}
-
-impl<'a> Iterator for Iter<'a> {
- type Item = &'a PatternRef;
-
- fn next(&mut self) -> Option<Self::Item> {
- if self.current == self.num_fonts {
- None
- } else {
- let pattern = unsafe {
- let ptr = *(*self.font_set.as_ptr()).fonts.add(self.current);
- PatternRef::from_ptr(ptr)
- };
-
- self.current += 1;
- Some(pattern)
- }
- }
-}
diff --git a/font/src/ft/fc/mod.rs b/font/src/ft/fc/mod.rs
deleted file mode 100644
index 1058bea3..00000000
--- a/font/src/ft/fc/mod.rs
+++ /dev/null
@@ -1,337 +0,0 @@
-use std::fmt;
-use std::ptr;
-
-use foreign_types::{ForeignType, ForeignTypeRef};
-
-use fontconfig::fontconfig as ffi;
-
-use ffi::FcResultNoMatch;
-use ffi::{FcFontList, FcFontMatch, FcFontSort};
-use ffi::{FcMatchFont, FcMatchPattern, FcMatchScan};
-use ffi::{FcSetApplication, FcSetSystem};
-use ffi::{FC_SLANT_ITALIC, FC_SLANT_OBLIQUE, FC_SLANT_ROMAN};
-use ffi::{FC_WEIGHT_BLACK, FC_WEIGHT_BOLD, FC_WEIGHT_EXTRABLACK, FC_WEIGHT_EXTRABOLD};
-use ffi::{FC_WEIGHT_BOOK, FC_WEIGHT_MEDIUM, FC_WEIGHT_REGULAR, FC_WEIGHT_SEMIBOLD};
-use ffi::{FC_WEIGHT_EXTRALIGHT, FC_WEIGHT_LIGHT, FC_WEIGHT_THIN};
-
-pub mod config;
-pub use config::{Config, ConfigRef};
-
-pub mod font_set;
-pub use font_set::{FontSet, FontSetRef};
-
-pub mod object_set;
-pub use object_set::{ObjectSet, ObjectSetRef};
-
-pub mod char_set;
-pub use char_set::{CharSet, CharSetRef};
-
-pub mod pattern;
-pub use pattern::{FTFaceLocation, Pattern, PatternHash, PatternRef};
-
-/// Find the font closest matching the provided pattern.
-///
-/// The returned pattern is the result of Pattern::render_prepare.
-pub fn font_match(config: &ConfigRef, pattern: &PatternRef) -> Option<Pattern> {
- unsafe {
- // What is this result actually used for? Seems redundant with
- // return type.
- let mut result = FcResultNoMatch;
- let ptr = FcFontMatch(config.as_ptr(), pattern.as_ptr(), &mut result);
-
- if ptr.is_null() {
- None
- } else {
- Some(Pattern::from_ptr(ptr))
- }
- }
-}
-
-/// List fonts by closeness to the pattern.
-pub fn font_sort(config: &ConfigRef, pattern: &PatternRef) -> Option<FontSet> {
- unsafe {
- // What is this result actually used for? Seems redundant with
- // return type.
- let mut result = FcResultNoMatch;
-
- let mut charsets: *mut _ = ptr::null_mut();
- let ptr = FcFontSort(
- config.as_ptr(),
- pattern.as_ptr(),
- 1, // Trim font list.
- &mut charsets,
- &mut result,
- );
-
- if ptr.is_null() {
- None
- } else {
- Some(FontSet::from_ptr(ptr))
- }
- }
-}
-
-/// List fonts matching pattern.
-pub fn font_list(
- config: &ConfigRef,
- pattern: &PatternRef,
- objects: &ObjectSetRef,
-) -> Option<FontSet> {
- unsafe {
- let ptr = FcFontList(config.as_ptr(), pattern.as_ptr(), objects.as_ptr());
-
- if ptr.is_null() {
- None
- } else {
- Some(FontSet::from_ptr(ptr))
- }
- }
-}
-
-/// Available font sets.
-#[derive(Debug, Copy, Clone)]
-pub enum SetName {
- System = FcSetSystem as isize,
- Application = FcSetApplication as isize,
-}
-
-/// When matching, how to match.
-#[derive(Debug, Copy, Clone)]
-pub enum MatchKind {
- Font = FcMatchFont as isize,
- Pattern = FcMatchPattern as isize,
- Scan = FcMatchScan as isize,
-}
-
-#[derive(Debug, Copy, Clone)]
-pub enum Slant {
- Italic = FC_SLANT_ITALIC as isize,
- Oblique = FC_SLANT_OBLIQUE as isize,
- Roman = FC_SLANT_ROMAN as isize,
-}
-
-#[derive(Debug, Copy, Clone)]
-pub enum Weight {
- Thin = FC_WEIGHT_THIN as isize,
- Extralight = FC_WEIGHT_EXTRALIGHT as isize,
- Light = FC_WEIGHT_LIGHT as isize,
- Book = FC_WEIGHT_BOOK as isize,
- Regular = FC_WEIGHT_REGULAR as isize,
- Medium = FC_WEIGHT_MEDIUM as isize,
- Semibold = FC_WEIGHT_SEMIBOLD as isize,
- Bold = FC_WEIGHT_BOLD as isize,
- Extrabold = FC_WEIGHT_EXTRABOLD as isize,
- Black = FC_WEIGHT_BLACK as isize,
- Extrablack = FC_WEIGHT_EXTRABLACK as isize,
-}
-
-#[derive(Debug, Copy, Clone)]
-pub enum Width {
- Ultracondensed,
- Extracondensed,
- Condensed,
- Semicondensed,
- Normal,
- Semiexpanded,
- Expanded,
- Extraexpanded,
- Ultraexpanded,
- Other(i32),
-}
-
-impl Width {
- fn to_isize(self) -> isize {
- match self {
- Width::Ultracondensed => 50,
- Width::Extracondensed => 63,
- Width::Condensed => 75,
- Width::Semicondensed => 87,
- Width::Normal => 100,
- Width::Semiexpanded => 113,
- Width::Expanded => 125,
- Width::Extraexpanded => 150,
- Width::Ultraexpanded => 200,
- Width::Other(value) => value as isize,
- }
- }
-}
-
-impl From<isize> for Width {
- fn from(value: isize) -> Self {
- match value {
- 50 => Width::Ultracondensed,
- 63 => Width::Extracondensed,
- 75 => Width::Condensed,
- 87 => Width::Semicondensed,
- 100 => Width::Normal,
- 113 => Width::Semiexpanded,
- 125 => Width::Expanded,
- 150 => Width::Extraexpanded,
- 200 => Width::Ultraexpanded,
- _ => Width::Other(value as _),
- }
- }
-}
-
-/// Subpixel geometry.
-#[derive(Debug)]
-pub enum Rgba {
- Unknown,
- Rgb,
- Bgr,
- Vrgb,
- Vbgr,
- None,
-}
-
-impl Rgba {
- fn to_isize(&self) -> isize {
- match *self {
- Rgba::Unknown => 0,
- Rgba::Rgb => 1,
- Rgba::Bgr => 2,
- Rgba::Vrgb => 3,
- Rgba::Vbgr => 4,
- Rgba::None => 5,
- }
- }
-}
-
-impl fmt::Display for Rgba {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- f.write_str(match *self {
- Rgba::Unknown => "unknown",
- Rgba::Rgb => "rgb",
- Rgba::Bgr => "bgr",
- Rgba::Vrgb => "vrgb",
- Rgba::Vbgr => "vbgr",
- Rgba::None => "none",
- })
- }
-}
-
-impl From<isize> for Rgba {
- fn from(val: isize) -> Rgba {
- match val {
- 1 => Rgba::Rgb,
- 2 => Rgba::Bgr,
- 3 => Rgba::Vrgb,
- 4 => Rgba::Vbgr,
- 5 => Rgba::None,
- _ => Rgba::Unknown,
- }
- }
-}
-
-/// Hinting Style.
-#[derive(Debug, Copy, Clone)]
-pub enum HintStyle {
- None,
- Slight,
- Medium,
- Full,
-}
-
-impl fmt::Display for HintStyle {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- f.write_str(match *self {
- HintStyle::None => "none",
- HintStyle::Slight => "slight",
- HintStyle::Medium => "medium",
- HintStyle::Full => "full",
- })
- }
-}
-
-/// Lcd filter, used to reduce color fringing with subpixel rendering.
-pub enum LcdFilter {
- None,
- Default,
- Light,
- Legacy,
-}
-
-impl fmt::Display for LcdFilter {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- f.write_str(match *self {
- LcdFilter::None => "none",
- LcdFilter::Default => "default",
- LcdFilter::Light => "light",
- LcdFilter::Legacy => "legacy",
- })
- }
-}
-
-#[cfg(test)]
-mod tests {
- use super::*;
-
- #[test]
- fn font_match() {
- let mut pattern = Pattern::new();
- pattern.add_family("monospace");
- pattern.add_style("regular");
-
- let config = Config::get_current();
- pattern.config_substitute(config, MatchKind::Pattern);
- pattern.default_substitute();
- let font = super::font_match(config, &pattern).expect("match font monospace");
-
- print!("index={:?}; ", font.index());
- print!("family={:?}; ", font.family());
- print!("style={:?}; ", font.style());
- print!("antialias={:?}; ", font.antialias());
- print!("autohint={:?}; ", font.autohint());
- print!("hinting={:?}; ", font.hinting());
- print!("rgba={:?}; ", font.rgba());
- print!("embeddedbitmap={:?}; ", font.embeddedbitmap());
- print!("lcdfilter={:?}; ", font.lcdfilter());
- print!("hintstyle={:?}", font.hintstyle());
- println!();
- }
-
- #[test]
- fn font_sort() {
- let mut pattern = Pattern::new();
- pattern.add_family("monospace");
- pattern.set_slant(Slant::Italic);
-
- let config = Config::get_current();
- pattern.config_substitute(config, MatchKind::Pattern);
- pattern.default_substitute();
- let fonts = super::font_sort(config, &pattern).expect("sort font monospace");
-
- for font in fonts.into_iter().take(10) {
- let font = pattern.render_prepare(&config, &font);
- print!("index={:?}; ", font.index());
- print!("family={:?}; ", font.family());
- print!("style={:?}; ", font.style());
- print!("rgba={:?}", font.rgba());
- print!("rgba={:?}", font.rgba());
- println!();
- }
- }
-
- #[test]
- fn font_sort_with_glyph() {
- let mut charset = CharSet::new();
- charset.add('💖');
- let mut pattern = Pattern::new();
- pattern.add_charset(&charset);
- drop(charset);
-
- let config = Config::get_current();
- pattern.config_substitute(config, MatchKind::Pattern);
- pattern.default_substitute();
- let fonts = super::font_sort(config, &pattern).expect("font_sort");
-
- for font in fonts.into_iter().take(10) {
- let font = pattern.render_prepare(&config, &font);
- print!("index={:?}; ", font.index());
- print!("family={:?}; ", font.family());
- print!("style={:?}; ", font.style());
- print!("rgba={:?}", font.rgba());
- println!();
- }
- }
-}
diff --git a/font/src/ft/fc/object_set.rs b/font/src/ft/fc/object_set.rs
deleted file mode 100644
index 74faabbf..00000000
--- a/font/src/ft/fc/object_set.rs
+++ /dev/null
@@ -1,48 +0,0 @@
-use std::ptr::NonNull;
-
-use libc::c_char;
-
-use super::ffi::{FcObjectSet, FcObjectSetAdd, FcObjectSetCreate, FcObjectSetDestroy};
-use foreign_types::{foreign_type, ForeignTypeRef};
-
-foreign_type! {
- pub unsafe type ObjectSet {
- type CType = FcObjectSet;
- fn drop = FcObjectSetDestroy;
- }
-}
-
-impl ObjectSet {
- pub fn new() -> Self {
- Self::default()
- }
-}
-
-impl Default for ObjectSet {
- fn default() -> Self {
- ObjectSet(unsafe { NonNull::new(FcObjectSetCreate()).unwrap() })
- }
-}
-
-impl ObjectSetRef {
- fn add(&mut self, property: &[u8]) {
- unsafe {
- FcObjectSetAdd(self.as_ptr(), property.as_ptr() as *mut c_char);
- }
- }
-
- #[inline]
- pub fn add_file(&mut self) {
- self.add(b"file\0");
- }
-
- #[inline]
- pub fn add_index(&mut self) {
- self.add(b"index\0");
- }
-
- #[inline]
- pub fn add_style(&mut self) {
- self.add(b"style\0");
- }
-}
diff --git a/font/src/ft/fc/pattern.rs b/font/src/ft/fc/pattern.rs
deleted file mode 100644
index 19d72b47..00000000
--- a/font/src/ft/fc/pattern.rs
+++ /dev/null
@@ -1,627 +0,0 @@
-use std::ffi::{CStr, CString};
-use std::fmt;
-use std::mem;
-use std::path::PathBuf;
-use std::ptr::{self, NonNull};
-use std::str;
-
-use foreign_types::{foreign_type, ForeignType, ForeignTypeRef};
-use libc::{c_char, c_double, c_int};
-
-use super::ffi::FcMatrix;
-use super::ffi::FcResultMatch;
-use super::ffi::{FcBool, FcFontRenderPrepare, FcPatternGetBool, FcPatternGetDouble};
-use super::ffi::{FcChar8, FcConfigSubstitute, FcDefaultSubstitute, FcPattern, FcPatternHash};
-use super::ffi::{
- FcPatternAddCharSet, FcPatternDestroy, FcPatternDuplicate, FcPatternGetCharSet,
- FcPatternGetMatrix,
-};
-use super::ffi::{FcPatternAddDouble, FcPatternAddString, FcPatternCreate, FcPatternGetString};
-use super::ffi::{FcPatternAddInteger, FcPatternGetInteger, FcPatternPrint};
-
-use super::{CharSetRef, ConfigRef, HintStyle, LcdFilter, MatchKind, Rgba, Slant, Weight, Width};
-
-pub struct StringPropertyIter<'a> {
- pattern: &'a PatternRef,
- object: &'a [u8],
- index: usize,
-}
-
-impl<'a> StringPropertyIter<'a> {
- fn new<'b>(pattern: &'b PatternRef, object: &'b [u8]) -> StringPropertyIter<'b> {
- StringPropertyIter { pattern, object, index: 0 }
- }
-
- fn get_value(&self, index: usize) -> Option<&'a str> {
- let mut value: *mut FcChar8 = ptr::null_mut();
-
- let result = unsafe {
- FcPatternGetString(
- self.pattern.as_ptr(),
- self.object.as_ptr() as *mut c_char,
- index as c_int,
- &mut value,
- )
- };
-
- if result == FcResultMatch {
- // Transmute here is to extend lifetime of the str to that of the iterator.
- //
- // Potential unsafety? What happens if the pattern is modified while this ptr is
- // borrowed out?
- Some(unsafe {
- mem::transmute(CStr::from_ptr(value as *const c_char).to_str().unwrap())
- })
- } else {
- None
- }
- }
-}
-
-/// Iterator over integer properties.
-pub struct BooleanPropertyIter<'a> {
- pattern: &'a PatternRef,
- object: &'a [u8],
- index: usize,
-}
-
-impl<'a> BooleanPropertyIter<'a> {
- fn new<'b>(pattern: &'b PatternRef, object: &'b [u8]) -> BooleanPropertyIter<'b> {
- BooleanPropertyIter { pattern, object, index: 0 }
- }
-
- fn get_value(&self, index: usize) -> Option<bool> {
- let mut value: FcBool = 0;
-
- let result = unsafe {
- FcPatternGetBool(
- self.pattern.as_ptr(),
- self.object.as_ptr() as *mut c_char,
- index as c_int,
- &mut value,
- )
- };
-
- if result == FcResultMatch {
- Some(value != 0)
- } else {
- None
- }
- }
-}
-
-/// Iterator over integer properties.
-pub struct IntPropertyIter<'a> {
- pattern: &'a PatternRef,
- object: &'a [u8],
- index: usize,
-}
-
-impl<'a> IntPropertyIter<'a> {
- fn new<'b>(pattern: &'b PatternRef, object: &'b [u8]) -> IntPropertyIter<'b> {
- IntPropertyIter { pattern, object, index: 0 }
- }
-
- fn get_value(&self, index: usize) -> Option<isize> {
- let mut value = 0 as c_int;
-
- let result = unsafe {
- FcPatternGetInteger(
- self.pattern.as_ptr(),
- self.object.as_ptr() as *mut c_char,
- index as c_int,
- &mut value,
- )
- };
-
- if result == FcResultMatch {
- Some(value as isize)
- } else {
- None
- }
- }
-}
-
-pub struct RgbaPropertyIter<'a> {
- inner: IntPropertyIter<'a>,
-}
-
-impl<'a> RgbaPropertyIter<'a> {
- fn new<'b>(pattern: &'b PatternRef, object: &'b [u8]) -> RgbaPropertyIter<'b> {
- RgbaPropertyIter { inner: IntPropertyIter::new(pattern, object) }
- }
-
- #[inline]
- fn inner<'b>(&'b mut self) -> &'b mut IntPropertyIter<'a> {
- &mut self.inner
- }
-
- fn get_value(&self, index: usize) -> Option<Rgba> {
- self.inner.get_value(index).map(Rgba::from)
- }
-}
-
-pub struct HintStylePropertyIter<'a> {
- inner: IntPropertyIter<'a>,
-}
-
-impl<'a> HintStylePropertyIter<'a> {
- fn new(pattern: &PatternRef) -> HintStylePropertyIter {
- HintStylePropertyIter { inner: IntPropertyIter::new(pattern, b"hintstyle\0") }
- }
-
- #[inline]
- fn inner<'b>(&'b mut self) -> &'b mut IntPropertyIter<'a> {
- &mut self.inner
- }
-
- fn get_value(&self, index: usize) -> Option<HintStyle> {
- self.inner.get_value(index).and_then(|hint_style| {
- Some(match hint_style {
- 0 => HintStyle::None,
- 1 => HintStyle::Slight,
- 2 => HintStyle::Medium,
- 3 => HintStyle::Full,
- _ => return None,
- })
- })
- }
-}
-
-pub struct LcdFilterPropertyIter<'a> {
- inner: IntPropertyIter<'a>,
-}
-
-impl<'a> LcdFilterPropertyIter<'a> {
- fn new(pattern: &PatternRef) -> LcdFilterPropertyIter {
- LcdFilterPropertyIter { inner: IntPropertyIter::new(pattern, b"lcdfilter\0") }
- }
-
- #[inline]
- fn inner<'b>(&'b mut self) -> &'b mut IntPropertyIter<'a> {
- &mut self.inner
- }
-
- fn get_value(&self, index: usize) -> Option<LcdFilter> {
- self.inner.get_value(index).and_then(|hint_style| {
- Some(match hint_style {
- 0 => LcdFilter::None,
- 1 => LcdFilter::Default,
- 2 => LcdFilter::Light,
- 3 => LcdFilter::Legacy,
- _ => return None,
- })
- })
- }
-}
-
-/// Iterator over integer properties.
-pub struct DoublePropertyIter<'a> {
- pattern: &'a PatternRef,
- object: &'a [u8],
- index: usize,
-}
-
-impl<'a> DoublePropertyIter<'a> {
- fn new<'b>(pattern: &'b PatternRef, object: &'b [u8]) -> DoublePropertyIter<'b> {
- DoublePropertyIter { pattern, object, index: 0 }
- }
-
- fn get_value(&self, index: usize) -> Option<f64> {
- let mut value = f64::from(0);
-
- let result = unsafe {
- FcPatternGetDouble(
- self.pattern.as_ptr(),
- self.object.as_ptr() as *mut c_char,
- index as c_int,
- &mut value,
- )
- };
-
- if result == FcResultMatch {
- Some(value as f64)
- } else {
- None
- }
- }
-}
-
-/// Implement debug for a property iterator.
-macro_rules! impl_property_iter_debug {
- ($iter:ty => $item:ty) => {
- impl<'a> fmt::Debug for $iter {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- write!(f, "[")?;
- for i in 0.. {
- match self.get_value(i) {
- Some(val) => {
- if i > 0 {
- write!(f, ", {}", val)?;
- } else {
- write!(f, "{}", val)?;
- }
- },
- _ => break,
- }
- }
- write!(f, "]")
- }
- }
- };
-}
-
-/// Implement Iterator and Debug for a property iterator.
-macro_rules! impl_property_iter {
- ($($iter:ty => $item:ty),*) => {
- $(
- impl<'a> Iterator for $iter {
- type Item = $item;
-
- fn next(&mut self) -> Option<Self::Item> {
- let res = self.get_value(self.index);
- self.index += 1;
- res
- }
-
- #[inline]
- fn nth(&mut self, n: usize) -> Option<Self::Item> {
- self.index += n;
- self.next()
- }
- }
- impl_property_iter_debug!($iter => $item);
- )*
- }
-}
-
-/// Implement Iterator and Debug for a property iterator which internally relies
-/// on another property iterator.
-macro_rules! impl_derived_property_iter {
- ($($iter:ty => $item:ty),*) => {
- $(
- impl<'a> Iterator for $iter {
- type Item = $item;
-
- fn next(&mut self) -> Option<Self::Item> {
- let index = { self.inner().index };
- let res = self.get_value(index);
- self.inner().index += 1;
- res
- }
-
- #[inline]
- fn nth(&mut self, n: usize) -> Option<Self::Item> {
- self.inner().index += n;
- self.next()
- }
- }
- impl_property_iter_debug!($iter => $item);
- )*
- }
-}
-
-// Basic Iterators.
-impl_property_iter! {
- StringPropertyIter<'a> => &'a str,
- IntPropertyIter<'a> => isize,
- DoublePropertyIter<'a> => f64,
- BooleanPropertyIter<'a> => bool
-}
-
-// Derived Iterators.
-impl_derived_property_iter! {
- RgbaPropertyIter<'a> => Rgba,
- HintStylePropertyIter<'a> => HintStyle,
- LcdFilterPropertyIter<'a> => LcdFilter
-}
-
-foreign_type! {
- pub unsafe type Pattern {
- type CType = FcPattern;
- fn drop = FcPatternDestroy;
- fn clone = FcPatternDuplicate;
- }
-}
-
-macro_rules! string_accessor {
- ($([$getter:ident, $setter:ident] => $object_name:expr),*) => {
- $(
- #[inline]
- pub fn $setter(&mut self, value: &str) -> bool {
- unsafe {
- self.add_string($object_name, value)
- }
- }
-
- #[inline]
- pub fn $getter(&self) -> StringPropertyIter {
- unsafe {
- self.get_string($object_name)
- }
- }
- )*
- }
-}
-
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
-pub struct PatternHash(pub u32);
-
-#[derive(Hash, Eq, PartialEq, Debug)]
-pub struct FTFaceLocation {
- pub path: PathBuf,
- pub index: isize,
-}
-
-impl FTFaceLocation {
- pub fn new(path: PathBuf, index: isize) -> Self {
- Self { path, index }
- }
-}
-
-impl Pattern {
- pub fn new() -> Self {
- Self::default()
- }
-}
-
-impl Default for Pattern {
- fn default() -> Self {
- Pattern(unsafe { NonNull::new(FcPatternCreate()).unwrap() })
- }
-}
-
-macro_rules! pattern_get_integer {
- ($($method:ident() => $property:expr),+) => {
- $(
- pub fn $method(&self) -> IntPropertyIter {
- unsafe {
- self.get_integer($property)
- }
- }
- )+
- };
-}
-
-macro_rules! boolean_getter {
- ($($method:ident() => $property:expr),*) => {
- $(
- pub fn $method(&self) -> BooleanPropertyIter {
- unsafe {
- self.get_boolean($property)
- }
- }
- )*
- }
-}
-
-macro_rules! double_getter {
- ($($method:ident() => $property:expr),*) => {
- $(
- pub fn $method(&self) -> DoublePropertyIter {
- unsafe {
- self.get_double($property)
- }
- }
- )*
- }
-}
-
-impl PatternRef {
- boolean_getter! {
- antialias() => b"antialias\0",
- hinting() => b"hinting\0",
- verticallayout() => b"verticallayout\0",
- autohint() => b"autohint\0",
- globaladvance() => b"globaladvance\0",
- scalable() => b"scalable\0",
- symbol() => b"symbol\0",
- color() => b"color\0",
- minspace() => b"minspace\0",
- embolden() => b"embolden\0",
- embeddedbitmap() => b"embeddedbitmap\0",
- decorative() => b"decorative\0"
- }
-
- double_getter! {
- size() => b"size\0",
- aspect() => b"aspect\0",
- pixelsize() => b"pixelsize\0",
- pixelsizefixupfactor() => b"pixelsizefixupfactor\0",
- scale() => b"scale\0",
- dpi() => b"dpi\0"
- }
-
- string_accessor! {
- [family, add_family] => b"family\0",
- [familylang, add_familylang] => b"familylang\0",
- [style, add_style] => b"style\0",
- [stylelang, add_stylelang] => b"stylelang\0",
- [fullname, add_fullname] => b"fullname\0",
- [fullnamelang, add_fullnamelang] => b"fullnamelang\0",
- [foundry, add_foundry] => b"foundry\0",
- [capability, add_capability] => b"capability\0",
- [fontformat, add_fontformat] => b"fontformat\0",
- [fontfeatures, add_fontfeatures] => b"fontfeatures\0",
- [namelang, add_namelang] => b"namelang\0",
- [postscriptname, add_postscriptname] => b"postscriptname\0"
- }
-
- pattern_get_integer! {
- index() => b"index\0"
- }
-
- /// Prints the pattern to stdout.
- ///
- /// FontConfig doesn't expose a way to iterate over all members of a pattern;
- /// instead, we just defer to FcPatternPrint. Otherwise, this could have been
- /// a `fmt::Debug` impl.
- pub fn print(&self) {
- unsafe { FcPatternPrint(self.as_ptr()) }
- }
-
- /// Add a string value to the pattern.
- ///
- /// If the returned value is `true`, the value is added at the end of
- /// any existing list, otherwise it is inserted at the beginning.
- ///
- /// # Unsafety
- ///
- /// `object` is not checked to be a valid null-terminated string.
- unsafe fn add_string(&mut self, object: &[u8], value: &str) -> bool {
- let value = CString::new(&value[..]).unwrap();
- let value = value.as_ptr();
-
- FcPatternAddString(self.as_ptr(), object.as_ptr() as *mut c_char, value as *mut FcChar8)
- == 1
- }
-
- unsafe fn add_integer(&self, object: &[u8], int: isize) -> bool {
- FcPatternAddInteger(self.as_ptr(), object.as_ptr() as *mut c_char, int as c_int) == 1
- }
-
- unsafe fn add_double(&self, object: &[u8], value: f64) -> bool {
- FcPatternAddDouble(self.as_ptr(), object.as_ptr() as *mut c_char, value as c_double) == 1
- }
-
- unsafe fn get_string<'a>(&'a self, object: &'a [u8]) -> StringPropertyIter<'a> {
- StringPropertyIter::new(self, object)
- }
-
- unsafe fn get_integer<'a>(&'a self, object: &'a [u8]) -> IntPropertyIter<'a> {
- IntPropertyIter::new(self, object)
- }
-
- unsafe fn get_double<'a>(&'a self, object: &'a [u8]) -> DoublePropertyIter<'a> {
- DoublePropertyIter::new(self, object)
- }
-
- unsafe fn get_boolean<'a>(&'a self, object: &'a [u8]) -> BooleanPropertyIter<'a> {
- BooleanPropertyIter::new(self, object)
- }
-
- pub fn hintstyle(&self) -> HintStylePropertyIter {
- HintStylePropertyIter::new(self)
- }
-
- pub fn lcdfilter(&self) -> LcdFilterPropertyIter {
- LcdFilterPropertyIter::new(self)
- }
-
- pub fn set_slant(&mut self, slant: Slant) -> bool {
- unsafe { self.add_integer(b"slant\0", slant as isize) }
- }
-
- pub fn add_pixelsize(&mut self, size: f64) -> bool {
- unsafe { self.add_double(b"pixelsize\0", size) }
- }
-
- pub fn set_weight(&mut self, weight: Weight) -> bool {
- unsafe { self.add_integer(b"weight\0", weight as isize) }
- }
-
- pub fn set_width(&mut self, width: Width) -> bool {
- unsafe { self.add_integer(b"width\0", width.to_isize()) }
- }
-
- pub fn get_width(&self) -> Option<Width> {
- unsafe { self.get_integer(b"width\0").next().map(Width::from) }
- }
-
- pub fn rgba(&self) -> RgbaPropertyIter {
- RgbaPropertyIter::new(self, b"rgba\0")
- }
-
- pub fn set_rgba(&self, rgba: &Rgba) -> bool {
- unsafe { self.add_integer(b"rgba\0", rgba.to_isize()) }
- }
-
- pub fn render_prepare(&self, config: &ConfigRef, request: &PatternRef) -> Pattern {
- unsafe {
- let ptr = FcFontRenderPrepare(config.as_ptr(), self.as_ptr(), request.as_ptr());
- Pattern::from_ptr(ptr)
- }
- }
-
- pub fn hash(&self) -> PatternHash {
- unsafe { PatternHash(FcPatternHash(self.as_ptr())) }
- }
-
- /// Add charset to the pattern.
- ///
- /// The referenced charset is copied by Fontconfig internally using
- /// FcValueSave so that no references to application provided memory are
- /// retained. That is, the CharSet can be safely dropped immediately
- /// after being added to the pattern.
- pub fn add_charset(&self, charset: &CharSetRef) -> bool {
- unsafe {
- FcPatternAddCharSet(
- self.as_ptr(),
- b"charset\0".as_ptr() as *mut c_char,
- charset.as_ptr(),
- ) == 1
- }
- }
-
- /// Get charset from the pattern.
- pub fn get_charset(&self) -> Option<&CharSetRef> {
- unsafe {
- let mut charset = ptr::null_mut();
-
- let result = FcPatternGetCharSet(
- self.as_ptr(),
- b"charset\0".as_ptr() as *mut c_char,
- 0,
- &mut charset,
- );
-
- if result == FcResultMatch {
- Some(&*(charset as *const CharSetRef))
- } else {
- None
- }
- }
- }
-
- /// Get matrix from the pattern.
- pub fn get_matrix(&self) -> Option<FcMatrix> {
- unsafe {
- let mut matrix = ptr::null_mut();
- let result = FcPatternGetMatrix(
- self.as_ptr(),
- b"matrix\0".as_ptr() as *mut c_char,
- 0,
- &mut matrix,
- );
-
- if result == FcResultMatch {
- Some(*matrix)
- } else {
- None
- }
- }
- }
-
- pub fn file(&self, index: usize) -> Option<PathBuf> {
- unsafe { self.get_string(b"file\0").nth(index) }.map(From::from)
- }
-
- pub fn ft_face_location(&self, index: usize) -> Option<FTFaceLocation> {
- match (self.file(index), self.index().next()) {
- (Some(path), Some(index)) => Some(FTFaceLocation::new(path, index)),
- _ => None,
- }
- }
-
- pub fn config_substitute(&mut self, config: &ConfigRef, kind: MatchKind) {
- unsafe {
- FcConfigSubstitute(config.as_ptr(), self.as_ptr(), kind as u32);
- }
- }
-
- pub fn default_substitute(&mut self) {
- unsafe {
- FcDefaultSubstitute(self.as_ptr());
- }
- }
-}
diff --git a/font/src/ft/mod.rs b/font/src/ft/mod.rs
deleted file mode 100644
index dd15c4bb..00000000
--- a/font/src/ft/mod.rs
+++ /dev/null
@@ -1,787 +0,0 @@
-//! Rasterization powered by FreeType and Fontconfig.
-
-use std::cmp::{min, Ordering};
-use std::collections::HashMap;
-use std::fmt::{self, Display, Formatter};
-use std::rc::Rc;
-
-use freetype::face::LoadFlag;
-use freetype::tt_os2::TrueTypeOS2Table;
-use freetype::{self, Library, Matrix};
-use freetype::{freetype_sys, Face as FTFace};
-use libc::{c_long, c_uint};
-use log::{debug, trace};
-
-pub mod fc;
-
-use fc::{CharSet, FTFaceLocation, Pattern, PatternHash, PatternRef};
-
-use super::{
- BitmapBuffer, FontDesc, FontKey, GlyphKey, Metrics, Rasterize, RasterizedGlyph, Size, Slant,
- Style, Weight,
-};
-
-struct FallbackFont {
- pattern: Pattern,
- key: FontKey,
-}
-
-impl FallbackFont {
- fn new(pattern: Pattern, key: FontKey) -> FallbackFont {
- Self { pattern, key }
- }
-}
-
-impl FontKey {
- fn from_pattern_hashes(lhs: PatternHash, rhs: PatternHash) -> Self {
- // XOR two hashes to get a font ID.
- Self { token: lhs.0.rotate_left(1) ^ rhs.0 }
- }
-}
-
-#[derive(Default)]
-struct FallbackList {
- list: Vec<FallbackFont>,
- coverage: CharSet,
-}
-
-struct FaceLoadingProperties {
- load_flags: LoadFlag,
- render_mode: freetype::RenderMode,
- lcd_filter: c_uint,
- non_scalable: Option<f32>,
- colored: bool,
- embolden: bool,
- matrix: Option<Matrix>,
- pixelsize_fixup_factor: Option<f64>,
- ft_face: Rc<FTFace>,
-}
-
-impl fmt::Debug for FaceLoadingProperties {
- fn fmt(&self, f: &mut Formatter) -> fmt::Result {
- f.debug_struct("Face")
- .field("ft_face", &self.ft_face)
- .field("load_flags", &self.load_flags)
- .field("render_mode", &match self.render_mode {
- freetype::RenderMode::Normal => "Normal",
- freetype::RenderMode::Light => "Light",
- freetype::RenderMode::Mono => "Mono",
- freetype::RenderMode::Lcd => "Lcd",
- freetype::RenderMode::LcdV => "LcdV",
- freetype::RenderMode::Max => "Max",
- })
- .field("lcd_filter", &self.lcd_filter)
- .finish()
- }
-}
-
-/// Rasterizes glyphs for a single font face.
-pub struct FreeTypeRasterizer {
- library: Library,
- faces: HashMap<FontKey, FaceLoadingProperties>,
- ft_faces: HashMap<FTFaceLocation, Rc<FTFace>>,
- fallback_lists: HashMap<FontKey, FallbackList>,
- device_pixel_ratio: f32,
-}
-
-#[inline]
-fn to_freetype_26_6(f: f32) -> isize {
- ((1i32 << 6) as f32 * f).round() as isize
-}
-
-#[inline]
-fn to_fixedpoint_16_6(f: f64) -> c_long {
- (f * 65536.0) as c_long
-}
-
-impl Rasterize for FreeTypeRasterizer {
- type Err = Error;
-
- fn new(device_pixel_ratio: f32, _: bool) -> Result<FreeTypeRasterizer, Error> {
- let library = Library::init()?;
-
- unsafe {
- // Initialize default properties, like user preferred interpreter.
- freetype_sys::FT_Set_Default_Properties(library.raw());
- };
-
- Ok(FreeTypeRasterizer {
- faces: HashMap::new(),
- ft_faces: HashMap::new(),
- fallback_lists: HashMap::new(),
- library,
- device_pixel_ratio,
- })
- }
-
- fn metrics(&self, key: FontKey, _size: Size) -> Result<Metrics, Error> {
- let face = &mut self.faces.get(&key).ok_or(Error::FontNotLoaded)?;
- let full = self.full_metrics(&face)?;
-
- let height = (full.size_metrics.height / 64) as f64;
- let descent = (full.size_metrics.descender / 64) as f32;
-
- // Get underline position and thickness in device pixels.
- let x_scale = full.size_metrics.x_scale as f32 / 65536.0;
- let mut underline_position = f32::from(face.ft_face.underline_position()) * x_scale / 64.;
- let mut underline_thickness = f32::from(face.ft_face.underline_thickness()) * x_scale / 64.;
-
- // Fallback for bitmap fonts which do not provide underline metrics.
- if underline_position == 0. {
- underline_thickness = (descent.abs() / 5.).round();
- underline_position = descent / 2.;
- }
-
- // Get strikeout position and thickness in device pixels.
- let (strikeout_position, strikeout_thickness) =
- match TrueTypeOS2Table::from_face(&mut (*face.ft_face).clone()) {
- Some(os2) => {
- let strikeout_position = f32::from(os2.y_strikeout_position()) * x_scale / 64.;
- let strikeout_thickness = f32::from(os2.y_strikeout_size()) * x_scale / 64.;
- (strikeout_position, strikeout_thickness)
- },
- _ => {
- // Fallback if font doesn't provide info about strikeout.
- trace!("Using fallback strikeout metrics");
- let strikeout_position = height as f32 / 2. + descent;
- (strikeout_position, underline_thickness)
- },
- };
-
- Ok(Metrics {
- average_advance: full.cell_width,
- line_height: height,
- descent,
- underline_position,
- underline_thickness,
- strikeout_position,
- strikeout_thickness,
- })
- }
-
- fn load_font(&mut self, desc: &FontDesc, size: Size) -> Result<FontKey, Error> {
- self.get_face(desc, size)
- }
-
- fn get_glyph(&mut self, glyph_key: GlyphKey) -> Result<RasterizedGlyph, Error> {
- self.get_rendered_glyph(glyph_key)
- }
-
- fn update_dpr(&mut self, device_pixel_ratio: f32) {
- self.device_pixel_ratio = device_pixel_ratio;
- }
-}
-
-pub trait IntoFontconfigType {
- type FcType;
- fn into_fontconfig_type(&self) -> Self::FcType;
-}
-
-impl IntoFontconfigType for Slant {
- type FcType = fc::Slant;
-
- fn into_fontconfig_type(&self) -> Self::FcType {
- match *self {
- Slant::Normal => fc::Slant::Roman,
- Slant::Italic => fc::Slant::Italic,
- Slant::Oblique => fc::Slant::Oblique,
- }
- }
-}
-
-impl IntoFontconfigType for Weight {
- type FcType = fc::Weight;
-
- fn into_fontconfig_type(&self) -> Self::FcType {
- match *self {
- Weight::Normal => fc::Weight::Regular,
- Weight::Bold => fc::Weight::Bold,
- }
- }
-}
-
-struct FullMetrics {
- size_metrics: freetype::ffi::FT_Size_Metrics,
- cell_width: f64,
-}
-
-impl FreeTypeRasterizer {
- /// Load a font face according to `FontDesc`.
- fn get_face(&mut self, desc: &FontDesc, size: Size) -> Result<FontKey, Error> {
- // Adjust for DPR.
- let size = f64::from(size.as_f32_pts() * self.device_pixel_ratio * 96. / 72.);
-
- let config = fc::Config::get_current();
- let mut pattern = Pattern::new();
- pattern.add_family(&desc.name);
- pattern.add_pixelsize(size);
-
- // Add style to a pattern.
- match desc.style {
- Style::Description { slant, weight } => {
- // Match nearest font.
- pattern.set_weight(weight.into_fontconfig_type());
- pattern.set_slant(slant.into_fontconfig_type());
- },
- Style::Specific(ref style) => {
- // If a name was specified, try and load specifically that font.
- pattern.add_style(style);
- },
- }
-
- // Hash requested pattern.
- let hash = pattern.hash();
-
- pattern.config_substitute(config, fc::MatchKind::Pattern);
- pattern.default_substitute();
-
- // Get font list using pattern. First font is the primary one while the rest are fallbacks.
- let matched_fonts =
- fc::font_sort(&config, &pattern).ok_or_else(|| Error::MissingFont(desc.to_owned()))?;
- let mut matched_fonts = matched_fonts.into_iter();
-
- let primary_font =
- matched_fonts.next().ok_or_else(|| Error::MissingFont(desc.to_owned()))?;
-
- // We should render patterns to get values like `pixelsizefixupfactor`.
- let primary_font = pattern.render_prepare(config, primary_font);
-
- // Hash pattern together with request pattern to include requested font size in the hash.
- let primary_font_key = FontKey::from_pattern_hashes(hash, primary_font.hash());
-
- // Return if we already have the same primary font.
- if self.fallback_lists.contains_key(&primary_font_key) {
- return Ok(primary_font_key);
- }
-
- // Load font if we haven't loaded it yet.
- if !self.faces.contains_key(&primary_font_key) {
- self.face_from_pattern(&primary_font, primary_font_key)
- .and_then(|pattern| pattern.ok_or_else(|| Error::MissingFont(desc.to_owned())))?;
- }
-
- // Coverage for fallback fonts.
- let coverage = CharSet::new();
- let empty_charset = CharSet::new();
-
- let list: Vec<FallbackFont> = matched_fonts
- .map(|fallback_font| {
- let charset = fallback_font.get_charset().unwrap_or(&empty_charset);
-
- // Use original pattern to preserve loading flags.
- let fallback_font = pattern.render_prepare(config, fallback_font);
- let fallback_font_key = FontKey::from_pattern_hashes(hash, fallback_font.hash());
-
- let _ = coverage.merge(&charset);
-
- FallbackFont::new(fallback_font, fallback_font_key)
- })
- .collect();
-
- self.fallback_lists.insert(primary_font_key, FallbackList { list, coverage });
-
- Ok(primary_font_key)
- }
-
- fn full_metrics(&self, face_load_props: &FaceLoadingProperties) -> Result<FullMetrics, Error> {
- let ft_face = &face_load_props.ft_face;
- let size_metrics = ft_face.size_metrics().ok_or(Error::MissingSizeMetrics)?;
-
- let width = match ft_face.load_char('0' as usize, face_load_props.load_flags) {
- Ok(_) => ft_face.glyph().metrics().horiAdvance / 64,
- Err(_) => size_metrics.max_advance / 64,
- } as f64;
-
- Ok(FullMetrics { size_metrics, cell_width: width })
- }
-
- fn load_ft_face(&mut self, ft_face_location: FTFaceLocation) -> Result<Rc<FTFace>, Error> {
- let mut ft_face = self.library.new_face(&ft_face_location.path, ft_face_location.index)?;
- if ft_face.has_color() {
- unsafe {
- // Select the colored bitmap size to use from the array of available sizes.
- freetype_sys::FT_Select_Size(ft_face.raw_mut(), 0);
- }
- }
-
- let ft_face = Rc::new(ft_face);
- self.ft_faces.insert(ft_face_location, Rc::clone(&ft_face));
-
- Ok(ft_face)
- }
-
- fn face_from_pattern(
- &mut self,
- pattern: &PatternRef,
- font_key: FontKey,
- ) -> Result<Option<FontKey>, Error> {
- if let Some(ft_face_location) = pattern.ft_face_location(0) {
- if self.faces.get(&font_key).is_some() {
- return Ok(Some(font_key));
- }
-
- trace!("Got font path={:?}, index={:?}", ft_face_location.path, ft_face_location.index);
-
- let ft_face = match self.ft_faces.get(&ft_face_location) {
- Some(ft_face) => Rc::clone(ft_face),
- None => self.load_ft_face(ft_face_location)?,
- };
-
- let non_scalable = if pattern.scalable().next().unwrap_or(true) {
- None
- } else {
- Some(pattern.pixelsize().next().expect("has 1+ pixelsize") as f32)
- };
-
- let embolden = pattern.embolden().next().unwrap_or(false);
-
- let matrix = pattern.get_matrix().map(|matrix| {
- // Convert Fontconfig matrix to FreeType matrix.
- let xx = to_fixedpoint_16_6(matrix.xx);
- let xy = to_fixedpoint_16_6(matrix.xy);
- let yx = to_fixedpoint_16_6(matrix.yx);
- let yy = to_fixedpoint_16_6(matrix.yy);
-
- Matrix { xx, xy, yx, yy }
- });
-
- let pixelsize_fixup_factor = pattern.pixelsizefixupfactor().next();
-
- let face = FaceLoadingProperties {
- load_flags: Self::ft_load_flags(pattern),
- render_mode: Self::ft_render_mode(pattern),
- lcd_filter: Self::ft_lcd_filter(pattern),
- non_scalable,
- colored: ft_face.has_color(),
- embolden,
- matrix,
- pixelsize_fixup_factor,
- ft_face,
- };
-
- debug!("Loaded Face {:?}", face);
-
- self.faces.insert(font_key, face);
-
- Ok(Some(font_key))
- } else {
- Ok(None)
- }
- }
-
- fn face_for_glyph(&mut self, glyph_key: GlyphKey) -> Result<FontKey, Error> {
- if let Some(face) = self.faces.get(&glyph_key.font_key) {
- let index = face.ft_face.get_char_index(glyph_key.c as usize);
-
- if index != 0 {
- return Ok(glyph_key.font_key);
- }
- }
-
- Ok(self.load_face_with_glyph(glyph_key).unwrap_or(glyph_key.font_key))
- }
-
- fn load_face_with_glyph(&mut self, glyph: GlyphKey) -> Result<FontKey, Error> {
- let fallback_list = self.fallback_lists.get(&glyph.font_key).unwrap();
-
- // Check whether glyph is presented in any fallback font.
- if !fallback_list.coverage.has_char(glyph.c) {
- return Ok(glyph.font_key);
- }
-
- for fallback_font in &fallback_list.list {
- let font_key = fallback_font.key;
- let font_pattern = &fallback_font.pattern;
- match self.faces.get(&font_key) {
- Some(face) => {
- let index = face.ft_face.get_char_index(glyph.c as usize);
-
- // We found something in a current face, so let's use it.
- if index != 0 {
- return Ok(font_key);
- }
- },
- None => {
- if font_pattern.get_charset().map(|cs| cs.has_char(glyph.c)) != Some(true) {
- continue;
- }
-
- let pattern = font_pattern.clone();
- let key = self.face_from_pattern(&pattern, font_key)?.unwrap();
-
- return Ok(key);
- },
- }
- }
-
- // You can hit this return, if you're failing to get charset from a pattern.
- Ok(glyph.font_key)
- }
-
- fn get_rendered_glyph(&mut self, glyph_key: GlyphKey) -> Result<RasterizedGlyph, Error> {
- // Render a normal character if it's not a cursor.
- let font_key = self.face_for_glyph(glyph_key)?;
- let face = &self.faces[&font_key];
- let index = face.ft_face.get_char_index(glyph_key.c as usize);
- let pixelsize = face
- .non_scalable
- .unwrap_or_else(|| glyph_key.size.as_f32_pts() * self.device_pixel_ratio * 96. / 72.);
-
- if !face.colored {
- face.ft_face.set_char_size(to_freetype_26_6(pixelsize), 0, 0, 0)?;
- }
-
- unsafe {
- let ft_lib = self.library.raw();
- freetype::ffi::FT_Library_SetLcdFilter(ft_lib, face.lcd_filter);
- }
-
- face.ft_face.load_glyph(index as u32, face.load_flags)?;
-
- let glyph = face.ft_face.glyph();
-
- // Generate synthetic bold.
- if face.embolden {
- unsafe {
- freetype_sys::FT_GlyphSlot_Embolden(glyph.raw()
- as *const freetype_sys::FT_GlyphSlotRec
- as *mut freetype_sys::FT_GlyphSlotRec);
- }
- }
-
- // Transform glyphs with the matrix from Fontconfig. Primarily used to generate italics.
- if let Some(matrix) = face.matrix.as_ref() {
- let glyph = face.ft_face.raw().glyph;
-
- unsafe {
- // Check that the glyph is a vectorial outline, not a bitmap.
- if (*glyph).format == freetype_sys::FT_GLYPH_FORMAT_OUTLINE {
- let outline = &(*glyph).outline;
-
- freetype_sys::FT_Outline_Transform(outline, matrix);
- }
- }
- }
-
- glyph.render_glyph(face.render_mode)?;
-
- let (pixel_height, pixel_width, buf) = Self::normalize_buffer(&glyph.bitmap())?;
-
- let rasterized_glyph = RasterizedGlyph {
- c: glyph_key.c,
- top: glyph.bitmap_top(),
- left: glyph.bitmap_left(),
- width: pixel_width,
- height: pixel_height,
- buf,
- };
-
- if face.colored {
- let fixup_factor = if let Some(pixelsize_fixup_factor) = face.pixelsize_fixup_factor {
- pixelsize_fixup_factor
- } else {
- // Fallback if user has bitmap scaling disabled.
- let metrics = face.ft_face.size_metrics().ok_or(Error::MissingSizeMetrics)?;
- f64::from(pixelsize) / f64::from(metrics.y_ppem)
- };
- Ok(downsample_bitmap(rasterized_glyph, fixup_factor))
- } else {
- Ok(rasterized_glyph)
- }
- }
-
- fn ft_load_flags(pattern: &PatternRef) -> LoadFlag {
- let antialias = pattern.antialias().next().unwrap_or(true);
- let autohint = pattern.autohint().next().unwrap_or(false);
- let hinting = pattern.hinting().next().unwrap_or(true);
- let rgba = pattern.rgba().next().unwrap_or(fc::Rgba::Unknown);
- let embedded_bitmaps = pattern.embeddedbitmap().next().unwrap_or(true);
- let scalable = pattern.scalable().next().unwrap_or(true);
- let color = pattern.color().next().unwrap_or(false);
-
- // Disable hinting if so was requested.
- let hintstyle = if hinting {
- pattern.hintstyle().next().unwrap_or(fc::HintStyle::Full)
- } else {
- fc::HintStyle::None
- };
-
- let mut flags = match (antialias, hintstyle, rgba) {
- (false, fc::HintStyle::None, _) => LoadFlag::NO_HINTING | LoadFlag::MONOCHROME,
- (false, ..) => LoadFlag::TARGET_MONO | LoadFlag::MONOCHROME,
- (true, fc::HintStyle::None, _) => LoadFlag::NO_HINTING,
- // `hintslight` does *not* use LCD hinting even when a subpixel mode
- // is selected.
- //
- // According to the FreeType docs,
- //
- // > You can use a hinting algorithm that doesn't correspond to the
- // > same rendering mode. As an example, it is possible to use the
- // > ‘light’ hinting algorithm and have the results rendered in
- // > horizontal LCD pixel mode.
- //
- // In practice, this means we can have `FT_LOAD_TARGET_LIGHT` with
- // subpixel render modes like `FT_RENDER_MODE_LCD`. Libraries like
- // cairo take the same approach and consider `hintslight` to always
- // prefer `FT_LOAD_TARGET_LIGHT`.
- (true, fc::HintStyle::Slight, _) => LoadFlag::TARGET_LIGHT,
- (true, fc::HintStyle::Medium, _) => LoadFlag::TARGET_NORMAL,
- // If LCD hinting is to be used, must select hintmedium or hintfull,
- // have AA enabled, and select a subpixel mode.
- (true, fc::HintStyle::Full, fc::Rgba::Rgb)
- | (true, fc::HintStyle::Full, fc::Rgba::Bgr) => LoadFlag::TARGET_LCD,
- (true, fc::HintStyle::Full, fc::Rgba::Vrgb)
- | (true, fc::HintStyle::Full, fc::Rgba::Vbgr) => LoadFlag::TARGET_LCD_V,
- // For non-rgba modes with Full hinting, just use the default hinting algorithm.
- (true, fc::HintStyle::Full, fc::Rgba::Unknown)
- | (true, fc::HintStyle::Full, fc::Rgba::None) => LoadFlag::TARGET_NORMAL,
- };
-
- // Non scalable fonts only have bitmaps, so disabling them entirely is likely not a
- // desirable thing. Colored fonts aren't scalable, but also only have bitmaps.
- if !embedded_bitmaps && scalable && !color {
- flags |= LoadFlag::NO_BITMAP;
- }
-
- // Use color for colored fonts.
- if color {
- flags |= LoadFlag::COLOR;
- }
-
- // Force autohint if it was requested.
- if autohint {
- flags |= LoadFlag::FORCE_AUTOHINT;
- }
-
- flags
- }
-
- fn ft_render_mode(pat: &PatternRef) -> freetype::RenderMode {
- let antialias = pat.antialias().next().unwrap_or(true);
- let rgba = pat.rgba().next().unwrap_or(fc::Rgba::Unknown);
-
- match (antialias, rgba) {
- (false, _) => freetype::RenderMode::Mono,
- (_, fc::Rgba::Rgb) | (_, fc::Rgba::Bgr) => freetype::RenderMode::Lcd,
- (_, fc::Rgba::Vrgb) | (_, fc::Rgba::Vbgr) => freetype::RenderMode::LcdV,
- (true, _) => freetype::RenderMode::Normal,
- }
- }
-
- fn ft_lcd_filter(pat: &PatternRef) -> c_uint {
- match pat.lcdfilter().next().unwrap_or(fc::LcdFilter::Default) {
- fc::LcdFilter::None => freetype::ffi::FT_LCD_FILTER_NONE,
- fc::LcdFilter::Default => freetype::ffi::FT_LCD_FILTER_DEFAULT,
- fc::LcdFilter::Light => freetype::ffi::FT_LCD_FILTER_LIGHT,
- fc::LcdFilter::Legacy => freetype::ffi::FT_LCD_FILTER_LEGACY,
- }
- }
-
- /// Given a FreeType `Bitmap`, returns packed buffer with 1 byte per LCD channel.
- ///
- /// The i32 value in the return type is the number of pixels per row.
- fn normalize_buffer(
- bitmap: &freetype::bitmap::Bitmap,
- ) -> freetype::FtResult<(i32, i32, BitmapBuffer)> {
- use freetype::bitmap::PixelMode;
-
- let buf = bitmap.buffer();
- let mut packed = Vec::with_capacity((bitmap.rows() * bitmap.width()) as usize);
- let pitch = bitmap.pitch().abs() as usize;
- match bitmap.pixel_mode()? {
- PixelMode::Lcd => {
- for i in 0..bitmap.rows() {
- let start = (i as usize) * pitch;
- let stop = start + bitmap.width() as usize;
- packed.extend_from_slice(&buf[start..stop]);
- }
- Ok((bitmap.rows(), bitmap.width() / 3, BitmapBuffer::RGB(packed)))
- },
- PixelMode::LcdV => {
- for i in 0..bitmap.rows() / 3 {
- for j in 0..bitmap.width() {
- for k in 0..3 {
- let offset = ((i as usize) * 3 + k) * pitch + (j as usize);
- packed.push(buf[offset]);
- }
- }
- }
- Ok((bitmap.rows() / 3, bitmap.width(), BitmapBuffer::RGB(packed)))
- },
- // Mono data is stored in a packed format using 1 bit per pixel.
- PixelMode::Mono => {
- fn unpack_byte(res: &mut Vec<u8>, byte: u8, mut count: u8) {
- // Mono stores MSBit at top of byte
- let mut bit = 7;
- while count != 0 {
- let value = ((byte >> bit) & 1) * 255;
- // Push value 3x since result buffer should be 1 byte
- // per channel.
- res.push(value);
- res.push(value);
- res.push(value);
- count -= 1;
- bit -= 1;
- }
- };
-
- for i in 0..(bitmap.rows() as usize) {
- let mut columns = bitmap.width();
- let mut byte = 0;
- let offset = i * bitmap.pitch().abs() as usize;
- while columns != 0 {
- let bits = min(8, columns);
- unpack_byte(&mut packed, buf[offset + byte], bits as u8);
-
- columns -= bits;
- byte += 1;
- }
- }
- Ok((bitmap.rows(), bitmap.width(), BitmapBuffer::RGB(packed)))
- },
- // Gray data is stored as a value between 0 and 255 using 1 byte per pixel.
- PixelMode::Gray => {
- for i in 0..bitmap.rows() {
- let start = (i as usize) * pitch;
- let stop = start + bitmap.width() as usize;
- for byte in &buf[start..stop] {
- packed.push(*byte);
- packed.push(*byte);
- packed.push(*byte);
- }
- }
- Ok((bitmap.rows(), bitmap.width(), BitmapBuffer::RGB(packed)))
- },
- PixelMode::Bgra => {
- let buf_size = (bitmap.rows() * bitmap.width() * 4) as usize;
- let mut i = 0;
- while i < buf_size {
- packed.push(buf[i + 2]);
- packed.push(buf[i + 1]);
- packed.push(buf[i]);
- packed.push(buf[i + 3]);
- i += 4;
- }
- Ok((bitmap.rows(), bitmap.width(), BitmapBuffer::RGBA(packed)))
- },
- mode => panic!("unhandled pixel mode: {:?}", mode),
- }
- }
-}
-
-/// Downscale a bitmap by a fixed factor.
-///
-/// This will take the `bitmap_glyph` as input and return the glyph's content downscaled by
-/// `fixup_factor`.
-fn downsample_bitmap(mut bitmap_glyph: RasterizedGlyph, fixup_factor: f64) -> RasterizedGlyph {
- // Only scale colored buffers which are bigger than required.
- let bitmap_buffer = match (&bitmap_glyph.buf, fixup_factor.partial_cmp(&1.0)) {
- (BitmapBuffer::RGBA(buffer), Some(Ordering::Less)) => buffer,
- _ => return bitmap_glyph,
- };
-
- let bitmap_width = bitmap_glyph.width as usize;
- let bitmap_height = bitmap_glyph.height as usize;
-
- let target_width = (bitmap_width as f64 * fixup_factor) as usize;
- let target_height = (bitmap_height as f64 * fixup_factor) as usize;
-
- // Number of pixels in the input buffer, per pixel in the output buffer.
- let downsampling_step = 1.0 / fixup_factor;
-
- let mut downsampled_buffer = Vec::<u8>::with_capacity(target_width * target_height * 4);
-
- for line_index in 0..target_height {
- // Get the first and last line which will be consolidated in the current output pixel.
- let line_index = line_index as f64;
- let source_line_start = (line_index * downsampling_step).round() as usize;
- let source_line_end = ((line_index + 1.) * downsampling_step).round() as usize;
-
- for column_index in 0..target_width {
- // Get the first and last column which will be consolidated in the current output
- // pixel.
- let column_index = column_index as f64;
- let source_column_start = (column_index * downsampling_step).round() as usize;
- let source_column_end = ((column_index + 1.) * downsampling_step).round() as usize;
-
- let (mut r, mut g, mut b, mut a) = (0u32, 0u32, 0u32, 0u32);
- let mut pixels_picked: u32 = 0;
-
- // Consolidate all pixels within the source rectangle into a single averaged pixel.
- for source_line in source_line_start..source_line_end {
- let source_pixel_index = source_line * bitmap_width;
-
- for source_column in source_column_start..source_column_end {
- let offset = (source_pixel_index + source_column) * 4;
- r += u32::from(bitmap_buffer[offset]);
- g += u32::from(bitmap_buffer[offset + 1]);
- b += u32::from(bitmap_buffer[offset + 2]);
- a += u32::from(bitmap_buffer[offset + 3]);
- pixels_picked += 1;
- }
- }
-
- // Add a single pixel to the output buffer for the downscaled source rectangle.
- downsampled_buffer.push((r / pixels_picked) as u8);
- downsampled_buffer.push((g / pixels_picked) as u8);
- downsampled_buffer.push((b / pixels_picked) as u8);
- downsampled_buffer.push((a / pixels_picked) as u8);
- }
- }
-
- bitmap_glyph.buf = BitmapBuffer::RGBA(downsampled_buffer);
-
- // Downscale the metrics.
- bitmap_glyph.top = (f64::from(bitmap_glyph.top) * fixup_factor) as i32;
- bitmap_glyph.left = (f64::from(bitmap_glyph.left) * fixup_factor) as i32;
- bitmap_glyph.width = target_width as i32;
- bitmap_glyph.height = target_height as i32;
-
- bitmap_glyph
-}
-
-/// Errors occurring when using the freetype rasterizer.
-#[derive(Debug)]
-pub enum Error {
- /// Error occurred within the FreeType library.
- FreeType(freetype::Error),
-
- /// Couldn't find font matching description.
- MissingFont(FontDesc),
-
- /// Tried to get size metrics from a Face that didn't have a size.
- MissingSizeMetrics,
-
- /// Requested an operation with a FontKey that isn't known to the rasterizer.
- FontNotLoaded,
-}
-
-impl std::error::Error for Error {
- fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
- match self {
- Error::FreeType(err) => err.source(),
- _ => None,
- }
- }
-}
-
-impl Display for Error {
- fn fmt(&self, f: &mut Formatter) -> fmt::Result {
- match self {
- Error::FreeType(err) => err.fmt(f),
- Error::MissingFont(err) => write!(f, "Unable to find the font {}", err),
- Error::FontNotLoaded => f.write_str("Tried to use a font that hasn't been loaded"),
- Error::MissingSizeMetrics => {
- f.write_str("Tried to get size metrics from a face without a size")
- },
- }
- }
-}
-
-impl From<freetype::Error> for Error {
- fn from(val: freetype::Error) -> Error {
- Error::FreeType(val)
- }
-}
-
-unsafe impl Send for FreeTypeRasterizer {}
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