726 lines
25 KiB
Rust
726 lines
25 KiB
Rust
use crate::{
|
|
point, px, size, Bounds, DevicePixels, Font, FontFeatures, FontId, FontMetrics, FontStyle,
|
|
FontWeight, GlyphId, Pixels, PlatformTextSystem, Point, RasterizeGlyphParams, Result,
|
|
ShapedGlyph, ShapedLine, ShapedRun, SharedString, Size, SUBPIXEL_VARIANTS,
|
|
};
|
|
use anyhow::anyhow;
|
|
use cocoa::appkit::{CGFloat, CGPoint};
|
|
use collections::HashMap;
|
|
use core_foundation::{
|
|
array::CFIndex,
|
|
attributed_string::{CFAttributedStringRef, CFMutableAttributedString},
|
|
base::{CFRange, TCFType},
|
|
string::CFString,
|
|
};
|
|
use core_graphics::{base::CGGlyph, color_space::CGColorSpace, context::CGContext};
|
|
use core_text::{font::CTFont, line::CTLine, string_attributes::kCTFontAttributeName};
|
|
use font_kit::{
|
|
font::Font as FontKitFont,
|
|
handle::Handle,
|
|
hinting::HintingOptions,
|
|
metrics::Metrics,
|
|
properties::{Style as FontkitStyle, Weight as FontkitWeight},
|
|
source::SystemSource,
|
|
sources::mem::MemSource,
|
|
};
|
|
use parking_lot::{RwLock, RwLockUpgradableReadGuard};
|
|
use pathfinder_geometry::{
|
|
rect::{RectF, RectI},
|
|
transform2d::Transform2F,
|
|
vector::{Vector2F, Vector2I},
|
|
};
|
|
use smallvec::SmallVec;
|
|
use std::{char, cmp, convert::TryFrom, ffi::c_void, sync::Arc};
|
|
|
|
use super::open_type;
|
|
|
|
#[allow(non_upper_case_globals)]
|
|
const kCGImageAlphaOnly: u32 = 7;
|
|
|
|
pub struct MacTextSystem(RwLock<MacTextSystemState>);
|
|
|
|
struct MacTextSystemState {
|
|
memory_source: MemSource,
|
|
system_source: SystemSource,
|
|
fonts: Vec<FontKitFont>,
|
|
font_selections: HashMap<Font, FontId>,
|
|
font_ids_by_postscript_name: HashMap<String, FontId>,
|
|
font_ids_by_family_name: HashMap<SharedString, SmallVec<[FontId; 4]>>,
|
|
postscript_names_by_font_id: HashMap<FontId, String>,
|
|
}
|
|
|
|
impl MacTextSystem {
|
|
pub fn new() -> Self {
|
|
Self(RwLock::new(MacTextSystemState {
|
|
memory_source: MemSource::empty(),
|
|
system_source: SystemSource::new(),
|
|
fonts: Vec::new(),
|
|
font_selections: HashMap::default(),
|
|
font_ids_by_postscript_name: HashMap::default(),
|
|
font_ids_by_family_name: HashMap::default(),
|
|
postscript_names_by_font_id: HashMap::default(),
|
|
}))
|
|
}
|
|
}
|
|
|
|
impl Default for MacTextSystem {
|
|
fn default() -> Self {
|
|
Self::new()
|
|
}
|
|
}
|
|
|
|
impl PlatformTextSystem for MacTextSystem {
|
|
fn add_fonts(&self, fonts: &[Arc<Vec<u8>>]) -> Result<()> {
|
|
self.0.write().add_fonts(fonts)
|
|
}
|
|
|
|
fn all_font_families(&self) -> Vec<String> {
|
|
self.0
|
|
.read()
|
|
.system_source
|
|
.all_families()
|
|
.expect("core text should never return an error")
|
|
}
|
|
|
|
fn font_id(&self, font: &Font) -> Result<FontId> {
|
|
let lock = self.0.upgradable_read();
|
|
if let Some(font_id) = lock.font_selections.get(font) {
|
|
Ok(*font_id)
|
|
} else {
|
|
let mut lock = RwLockUpgradableReadGuard::upgrade(lock);
|
|
let candidates = if let Some(font_ids) = lock.font_ids_by_family_name.get(&font.family)
|
|
{
|
|
font_ids.as_slice()
|
|
} else {
|
|
let font_ids = lock.load_family(&font.family, font.features)?;
|
|
lock.font_ids_by_family_name
|
|
.insert(font.family.clone(), font_ids);
|
|
lock.font_ids_by_family_name[&font.family].as_ref()
|
|
};
|
|
|
|
let candidate_properties = candidates
|
|
.iter()
|
|
.map(|font_id| lock.fonts[font_id.0].properties())
|
|
.collect::<SmallVec<[_; 4]>>();
|
|
|
|
let ix = font_kit::matching::find_best_match(
|
|
&candidate_properties,
|
|
&font_kit::properties::Properties {
|
|
style: font.style.into(),
|
|
weight: font.weight.into(),
|
|
stretch: Default::default(),
|
|
},
|
|
)?;
|
|
|
|
Ok(candidates[ix])
|
|
}
|
|
}
|
|
|
|
fn font_metrics(&self, font_id: FontId) -> FontMetrics {
|
|
self.0.read().fonts[font_id.0].metrics().into()
|
|
}
|
|
|
|
fn typographic_bounds(&self, font_id: FontId, glyph_id: GlyphId) -> Result<Bounds<f32>> {
|
|
Ok(self.0.read().fonts[font_id.0]
|
|
.typographic_bounds(glyph_id.into())?
|
|
.into())
|
|
}
|
|
|
|
fn advance(&self, font_id: FontId, glyph_id: GlyphId) -> Result<Size<f32>> {
|
|
self.0.read().advance(font_id, glyph_id)
|
|
}
|
|
|
|
fn glyph_for_char(&self, font_id: FontId, ch: char) -> Option<GlyphId> {
|
|
self.0.read().glyph_for_char(font_id, ch)
|
|
}
|
|
|
|
fn rasterize_glyph(
|
|
&self,
|
|
glyph_id: &RasterizeGlyphParams,
|
|
) -> Result<(Size<DevicePixels>, Vec<u8>)> {
|
|
self.0.read().rasterize_glyph(glyph_id)
|
|
}
|
|
|
|
fn layout_line(
|
|
&self,
|
|
text: &str,
|
|
font_size: Pixels,
|
|
font_runs: &[(usize, FontId)],
|
|
) -> ShapedLine {
|
|
self.0.write().layout_line(text, font_size, font_runs)
|
|
}
|
|
|
|
fn wrap_line(
|
|
&self,
|
|
text: &str,
|
|
font_id: FontId,
|
|
font_size: Pixels,
|
|
width: Pixels,
|
|
) -> Vec<usize> {
|
|
self.0.read().wrap_line(text, font_id, font_size, width)
|
|
}
|
|
}
|
|
|
|
impl MacTextSystemState {
|
|
fn add_fonts(&mut self, fonts: &[Arc<Vec<u8>>]) -> Result<()> {
|
|
self.memory_source.add_fonts(
|
|
fonts
|
|
.iter()
|
|
.map(|bytes| Handle::from_memory(bytes.clone(), 0)),
|
|
)?;
|
|
Ok(())
|
|
}
|
|
|
|
fn load_family(
|
|
&mut self,
|
|
name: &SharedString,
|
|
features: FontFeatures,
|
|
) -> Result<SmallVec<[FontId; 4]>> {
|
|
let mut font_ids = SmallVec::new();
|
|
let family = self
|
|
.memory_source
|
|
.select_family_by_name(name.as_ref())
|
|
.or_else(|_| self.system_source.select_family_by_name(name.as_ref()))?;
|
|
for font in family.fonts() {
|
|
let mut font = font.load()?;
|
|
open_type::apply_features(&mut font, features);
|
|
let font_id = FontId(self.fonts.len());
|
|
font_ids.push(font_id);
|
|
let postscript_name = font.postscript_name().unwrap();
|
|
self.font_ids_by_postscript_name
|
|
.insert(postscript_name.clone(), font_id);
|
|
self.postscript_names_by_font_id
|
|
.insert(font_id, postscript_name);
|
|
self.fonts.push(font);
|
|
}
|
|
Ok(font_ids)
|
|
}
|
|
|
|
fn advance(&self, font_id: FontId, glyph_id: GlyphId) -> Result<Size<f32>> {
|
|
Ok(self.fonts[font_id.0].advance(glyph_id.into())?.into())
|
|
}
|
|
|
|
fn glyph_for_char(&self, font_id: FontId, ch: char) -> Option<GlyphId> {
|
|
self.fonts[font_id.0].glyph_for_char(ch).map(Into::into)
|
|
}
|
|
|
|
fn id_for_native_font(&mut self, requested_font: CTFont) -> FontId {
|
|
let postscript_name = requested_font.postscript_name();
|
|
if let Some(font_id) = self.font_ids_by_postscript_name.get(&postscript_name) {
|
|
*font_id
|
|
} else {
|
|
let font_id = FontId(self.fonts.len());
|
|
self.font_ids_by_postscript_name
|
|
.insert(postscript_name.clone(), font_id);
|
|
self.postscript_names_by_font_id
|
|
.insert(font_id, postscript_name);
|
|
self.fonts
|
|
.push(font_kit::font::Font::from_core_graphics_font(
|
|
requested_font.copy_to_CGFont(),
|
|
));
|
|
font_id
|
|
}
|
|
}
|
|
|
|
fn is_emoji(&self, font_id: FontId) -> bool {
|
|
self.postscript_names_by_font_id
|
|
.get(&font_id)
|
|
.map_or(false, |postscript_name| {
|
|
postscript_name == "AppleColorEmoji"
|
|
})
|
|
}
|
|
|
|
fn rasterize_glyph(
|
|
&self,
|
|
glyph_id: &RasterizeGlyphParams,
|
|
) -> Result<(Size<DevicePixels>, Vec<u8>)> {
|
|
let font = &self.fonts[glyph_id.font_id.0];
|
|
let scale = Transform2F::from_scale(glyph_id.scale_factor);
|
|
let glyph_bounds = font.raster_bounds(
|
|
glyph_id.glyph_id.into(),
|
|
glyph_id.font_size.into(),
|
|
scale,
|
|
HintingOptions::None,
|
|
font_kit::canvas::RasterizationOptions::GrayscaleAa,
|
|
)?;
|
|
|
|
if glyph_bounds.width() == 0 || glyph_bounds.height() == 0 {
|
|
Err(anyhow!("glyph bounds are empty"))
|
|
} else {
|
|
// Make room for subpixel variants.
|
|
let subpixel_padding = Vector2I::new(
|
|
glyph_id.subpixel_variant.x.min(1) as i32,
|
|
glyph_id.subpixel_variant.y.min(1) as i32,
|
|
);
|
|
let bitmap_size = glyph_bounds.size() + subpixel_padding;
|
|
|
|
let mut bytes = vec![0; bitmap_size.x() as usize * bitmap_size.y() as usize];
|
|
let cx = CGContext::create_bitmap_context(
|
|
Some(bytes.as_mut_ptr() as *mut _),
|
|
bitmap_size.x() as usize,
|
|
bitmap_size.y() as usize,
|
|
8,
|
|
bitmap_size.x() as usize,
|
|
&CGColorSpace::create_device_gray(),
|
|
kCGImageAlphaOnly,
|
|
);
|
|
|
|
// Move the origin to bottom left and account for scaling, this
|
|
// makes drawing text consistent with the font-kit's raster_bounds.
|
|
cx.translate(
|
|
-glyph_bounds.origin_x() as CGFloat,
|
|
(glyph_bounds.origin_y() + glyph_bounds.height()) as CGFloat,
|
|
);
|
|
cx.scale(
|
|
glyph_id.scale_factor as CGFloat,
|
|
glyph_id.scale_factor as CGFloat,
|
|
);
|
|
|
|
let subpixel_shift = glyph_id
|
|
.subpixel_variant
|
|
.map(|v| v as f32 / SUBPIXEL_VARIANTS as f32 / glyph_id.scale_factor);
|
|
|
|
cx.set_allows_font_subpixel_positioning(true);
|
|
cx.set_should_subpixel_position_fonts(true);
|
|
cx.set_allows_font_subpixel_quantization(false);
|
|
cx.set_should_subpixel_quantize_fonts(false);
|
|
font.native_font()
|
|
.clone_with_font_size(f32::from(glyph_id.font_size) as CGFloat)
|
|
.draw_glyphs(
|
|
&[u32::from(glyph_id.glyph_id) as CGGlyph],
|
|
&[CGPoint::new(
|
|
subpixel_shift.x as CGFloat,
|
|
subpixel_shift.y as CGFloat,
|
|
)],
|
|
cx,
|
|
);
|
|
|
|
Ok((bitmap_size.into(), bytes))
|
|
}
|
|
}
|
|
|
|
fn layout_line(
|
|
&mut self,
|
|
text: &str,
|
|
font_size: Pixels,
|
|
font_runs: &[(usize, FontId)],
|
|
) -> ShapedLine {
|
|
// Construct the attributed string, converting UTF8 ranges to UTF16 ranges.
|
|
let mut string = CFMutableAttributedString::new();
|
|
{
|
|
string.replace_str(&CFString::new(text), CFRange::init(0, 0));
|
|
let utf16_line_len = string.char_len() as usize;
|
|
|
|
let mut ix_converter = StringIndexConverter::new(text);
|
|
for (run_len, font_id) in font_runs {
|
|
let utf8_end = ix_converter.utf8_ix + run_len;
|
|
let utf16_start = ix_converter.utf16_ix;
|
|
|
|
if utf16_start >= utf16_line_len {
|
|
break;
|
|
}
|
|
|
|
ix_converter.advance_to_utf8_ix(utf8_end);
|
|
let utf16_end = cmp::min(ix_converter.utf16_ix, utf16_line_len);
|
|
|
|
let cf_range =
|
|
CFRange::init(utf16_start as isize, (utf16_end - utf16_start) as isize);
|
|
|
|
let font: &FontKitFont = &self.fonts[font_id.0];
|
|
unsafe {
|
|
string.set_attribute(
|
|
cf_range,
|
|
kCTFontAttributeName,
|
|
&font.native_font().clone_with_font_size(font_size.into()),
|
|
);
|
|
}
|
|
|
|
if utf16_end == utf16_line_len {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Retrieve the glyphs from the shaped line, converting UTF16 offsets to UTF8 offsets.
|
|
let line = CTLine::new_with_attributed_string(string.as_concrete_TypeRef());
|
|
|
|
let mut runs = Vec::new();
|
|
for run in line.glyph_runs().into_iter() {
|
|
let attributes = run.attributes().unwrap();
|
|
let font = unsafe {
|
|
attributes
|
|
.get(kCTFontAttributeName)
|
|
.downcast::<CTFont>()
|
|
.unwrap()
|
|
};
|
|
let font_id = self.id_for_native_font(font);
|
|
|
|
let mut ix_converter = StringIndexConverter::new(text);
|
|
let mut glyphs = Vec::new();
|
|
for ((glyph_id, position), glyph_utf16_ix) in run
|
|
.glyphs()
|
|
.iter()
|
|
.zip(run.positions().iter())
|
|
.zip(run.string_indices().iter())
|
|
{
|
|
let glyph_utf16_ix = usize::try_from(*glyph_utf16_ix).unwrap();
|
|
ix_converter.advance_to_utf16_ix(glyph_utf16_ix);
|
|
glyphs.push(ShapedGlyph {
|
|
id: (*glyph_id).into(),
|
|
position: point(position.x as f32, position.y as f32).map(px),
|
|
index: ix_converter.utf8_ix,
|
|
is_emoji: self.is_emoji(font_id),
|
|
});
|
|
}
|
|
|
|
runs.push(ShapedRun { font_id, glyphs })
|
|
}
|
|
|
|
let typographic_bounds = line.get_typographic_bounds();
|
|
ShapedLine {
|
|
width: typographic_bounds.width.into(),
|
|
ascent: typographic_bounds.ascent.into(),
|
|
descent: typographic_bounds.descent.into(),
|
|
runs,
|
|
font_size,
|
|
len: text.len(),
|
|
}
|
|
}
|
|
|
|
fn wrap_line(
|
|
&self,
|
|
text: &str,
|
|
font_id: FontId,
|
|
font_size: Pixels,
|
|
width: Pixels,
|
|
) -> Vec<usize> {
|
|
let mut string = CFMutableAttributedString::new();
|
|
string.replace_str(&CFString::new(text), CFRange::init(0, 0));
|
|
let cf_range = CFRange::init(0, text.encode_utf16().count() as isize);
|
|
let font = &self.fonts[font_id.0];
|
|
unsafe {
|
|
string.set_attribute(
|
|
cf_range,
|
|
kCTFontAttributeName,
|
|
&font.native_font().clone_with_font_size(font_size.into()),
|
|
);
|
|
|
|
let typesetter = CTTypesetterCreateWithAttributedString(string.as_concrete_TypeRef());
|
|
let mut ix_converter = StringIndexConverter::new(text);
|
|
let mut break_indices = Vec::new();
|
|
while ix_converter.utf8_ix < text.len() {
|
|
let utf16_len = CTTypesetterSuggestLineBreak(
|
|
typesetter,
|
|
ix_converter.utf16_ix as isize,
|
|
width.into(),
|
|
) as usize;
|
|
ix_converter.advance_to_utf16_ix(ix_converter.utf16_ix + utf16_len);
|
|
if ix_converter.utf8_ix >= text.len() {
|
|
break;
|
|
}
|
|
break_indices.push(ix_converter.utf8_ix as usize);
|
|
}
|
|
break_indices
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Clone)]
|
|
struct StringIndexConverter<'a> {
|
|
text: &'a str,
|
|
utf8_ix: usize,
|
|
utf16_ix: usize,
|
|
}
|
|
|
|
impl<'a> StringIndexConverter<'a> {
|
|
fn new(text: &'a str) -> Self {
|
|
Self {
|
|
text,
|
|
utf8_ix: 0,
|
|
utf16_ix: 0,
|
|
}
|
|
}
|
|
|
|
fn advance_to_utf8_ix(&mut self, utf8_target: usize) {
|
|
for (ix, c) in self.text[self.utf8_ix..].char_indices() {
|
|
if self.utf8_ix + ix >= utf8_target {
|
|
self.utf8_ix += ix;
|
|
return;
|
|
}
|
|
self.utf16_ix += c.len_utf16();
|
|
}
|
|
self.utf8_ix = self.text.len();
|
|
}
|
|
|
|
fn advance_to_utf16_ix(&mut self, utf16_target: usize) {
|
|
for (ix, c) in self.text[self.utf8_ix..].char_indices() {
|
|
if self.utf16_ix >= utf16_target {
|
|
self.utf8_ix += ix;
|
|
return;
|
|
}
|
|
self.utf16_ix += c.len_utf16();
|
|
}
|
|
self.utf8_ix = self.text.len();
|
|
}
|
|
}
|
|
|
|
#[repr(C)]
|
|
pub struct __CFTypesetter(c_void);
|
|
|
|
pub type CTTypesetterRef = *const __CFTypesetter;
|
|
|
|
#[link(name = "CoreText", kind = "framework")]
|
|
extern "C" {
|
|
fn CTTypesetterCreateWithAttributedString(string: CFAttributedStringRef) -> CTTypesetterRef;
|
|
|
|
fn CTTypesetterSuggestLineBreak(
|
|
typesetter: CTTypesetterRef,
|
|
start_index: CFIndex,
|
|
width: f64,
|
|
) -> CFIndex;
|
|
}
|
|
|
|
impl From<Metrics> for FontMetrics {
|
|
fn from(metrics: Metrics) -> Self {
|
|
FontMetrics {
|
|
units_per_em: metrics.units_per_em,
|
|
ascent: metrics.ascent,
|
|
descent: metrics.descent,
|
|
line_gap: metrics.line_gap,
|
|
underline_position: metrics.underline_position,
|
|
underline_thickness: metrics.underline_thickness,
|
|
cap_height: metrics.cap_height,
|
|
x_height: metrics.x_height,
|
|
bounding_box: metrics.bounding_box.into(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl From<RectF> for Bounds<f32> {
|
|
fn from(rect: RectF) -> Self {
|
|
Bounds {
|
|
origin: point(rect.origin_x(), rect.origin_y()),
|
|
size: size(rect.width(), rect.height()),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl From<RectI> for Bounds<DevicePixels> {
|
|
fn from(rect: RectI) -> Self {
|
|
Bounds {
|
|
origin: point(DevicePixels(rect.origin_x()), DevicePixels(rect.origin_y())),
|
|
size: size(DevicePixels(rect.width()), DevicePixels(rect.height())),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl From<Vector2I> for Size<DevicePixels> {
|
|
fn from(value: Vector2I) -> Self {
|
|
size(value.x().into(), value.y().into())
|
|
}
|
|
}
|
|
|
|
impl From<RectI> for Bounds<i32> {
|
|
fn from(rect: RectI) -> Self {
|
|
Bounds {
|
|
origin: point(rect.origin_x(), rect.origin_y()),
|
|
size: size(rect.width(), rect.height()),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl From<Point<u32>> for Vector2I {
|
|
fn from(size: Point<u32>) -> Self {
|
|
Vector2I::new(size.x as i32, size.y as i32)
|
|
}
|
|
}
|
|
|
|
impl From<Vector2F> for Size<f32> {
|
|
fn from(vec: Vector2F) -> Self {
|
|
size(vec.x(), vec.y())
|
|
}
|
|
}
|
|
|
|
impl From<FontWeight> for FontkitWeight {
|
|
fn from(value: FontWeight) -> Self {
|
|
FontkitWeight(value.0)
|
|
}
|
|
}
|
|
|
|
impl From<FontStyle> for FontkitStyle {
|
|
fn from(style: FontStyle) -> Self {
|
|
match style {
|
|
FontStyle::Normal => FontkitStyle::Normal,
|
|
FontStyle::Italic => FontkitStyle::Italic,
|
|
FontStyle::Oblique => FontkitStyle::Oblique,
|
|
}
|
|
}
|
|
}
|
|
|
|
// #[cfg(test)]
|
|
// mod tests {
|
|
// use super::*;
|
|
// use crate::AppContext;
|
|
// use font_kit::properties::{Style, Weight};
|
|
// use platform::FontSystem as _;
|
|
|
|
// #[crate::test(self, retries = 5)]
|
|
// fn test_layout_str(_: &mut AppContext) {
|
|
// // This is failing intermittently on CI and we don't have time to figure it out
|
|
// let fonts = FontSystem::new();
|
|
// let menlo = fonts.load_family("Menlo", &Default::default()).unwrap();
|
|
// let menlo_regular = RunStyle {
|
|
// font_id: fonts.select_font(&menlo, &Properties::new()).unwrap(),
|
|
// color: Default::default(),
|
|
// underline: Default::default(),
|
|
// };
|
|
// let menlo_italic = RunStyle {
|
|
// font_id: fonts
|
|
// .select_font(&menlo, Properties::new().style(Style::Italic))
|
|
// .unwrap(),
|
|
// color: Default::default(),
|
|
// underline: Default::default(),
|
|
// };
|
|
// let menlo_bold = RunStyle {
|
|
// font_id: fonts
|
|
// .select_font(&menlo, Properties::new().weight(Weight::BOLD))
|
|
// .unwrap(),
|
|
// color: Default::default(),
|
|
// underline: Default::default(),
|
|
// };
|
|
// assert_ne!(menlo_regular, menlo_italic);
|
|
// assert_ne!(menlo_regular, menlo_bold);
|
|
// assert_ne!(menlo_italic, menlo_bold);
|
|
|
|
// let line = fonts.layout_line(
|
|
// "hello world",
|
|
// 16.0,
|
|
// &[(2, menlo_bold), (4, menlo_italic), (5, menlo_regular)],
|
|
// );
|
|
// assert_eq!(line.runs.len(), 3);
|
|
// assert_eq!(line.runs[0].font_id, menlo_bold.font_id);
|
|
// assert_eq!(line.runs[0].glyphs.len(), 2);
|
|
// assert_eq!(line.runs[1].font_id, menlo_italic.font_id);
|
|
// assert_eq!(line.runs[1].glyphs.len(), 4);
|
|
// assert_eq!(line.runs[2].font_id, menlo_regular.font_id);
|
|
// assert_eq!(line.runs[2].glyphs.len(), 5);
|
|
// }
|
|
|
|
// #[test]
|
|
// fn test_glyph_offsets() -> crate::Result<()> {
|
|
// let fonts = FontSystem::new();
|
|
// let zapfino = fonts.load_family("Zapfino", &Default::default())?;
|
|
// let zapfino_regular = RunStyle {
|
|
// font_id: fonts.select_font(&zapfino, &Properties::new())?,
|
|
// color: Default::default(),
|
|
// underline: Default::default(),
|
|
// };
|
|
// let menlo = fonts.load_family("Menlo", &Default::default())?;
|
|
// let menlo_regular = RunStyle {
|
|
// font_id: fonts.select_font(&menlo, &Properties::new())?,
|
|
// color: Default::default(),
|
|
// underline: Default::default(),
|
|
// };
|
|
|
|
// let text = "This is, m𐍈re 𐍈r less, Zapfino!𐍈";
|
|
// let line = fonts.layout_line(
|
|
// text,
|
|
// 16.0,
|
|
// &[
|
|
// (9, zapfino_regular),
|
|
// (13, menlo_regular),
|
|
// (text.len() - 22, zapfino_regular),
|
|
// ],
|
|
// );
|
|
// assert_eq!(
|
|
// line.runs
|
|
// .iter()
|
|
// .flat_map(|r| r.glyphs.iter())
|
|
// .map(|g| g.index)
|
|
// .collect::<Vec<_>>(),
|
|
// vec![0, 2, 4, 5, 7, 8, 9, 10, 14, 15, 16, 17, 21, 22, 23, 24, 26, 27, 28, 29, 36, 37],
|
|
// );
|
|
// Ok(())
|
|
// }
|
|
|
|
// #[test]
|
|
// #[ignore]
|
|
// fn test_rasterize_glyph() {
|
|
// use std::{fs::File, io::BufWriter, path::Path};
|
|
|
|
// let fonts = FontSystem::new();
|
|
// let font_ids = fonts.load_family("Fira Code", &Default::default()).unwrap();
|
|
// let font_id = fonts.select_font(&font_ids, &Default::default()).unwrap();
|
|
// let glyph_id = fonts.glyph_for_char(font_id, 'G').unwrap();
|
|
|
|
// const VARIANTS: usize = 1;
|
|
// for i in 0..VARIANTS {
|
|
// let variant = i as f32 / VARIANTS as f32;
|
|
// let (bounds, bytes) = fonts
|
|
// .rasterize_glyph(
|
|
// font_id,
|
|
// 16.0,
|
|
// glyph_id,
|
|
// vec2f(variant, variant),
|
|
// 2.,
|
|
// RasterizationOptions::Alpha,
|
|
// )
|
|
// .unwrap();
|
|
|
|
// let name = format!("/Users/as-cii/Desktop/twog-{}.png", i);
|
|
// let path = Path::new(&name);
|
|
// let file = File::create(path).unwrap();
|
|
// let w = &mut BufWriter::new(file);
|
|
|
|
// let mut encoder = png::Encoder::new(w, bounds.width() as u32, bounds.height() as u32);
|
|
// encoder.set_color(png::ColorType::Grayscale);
|
|
// encoder.set_depth(png::BitDepth::Eight);
|
|
// let mut writer = encoder.write_header().unwrap();
|
|
// writer.write_image_data(&bytes).unwrap();
|
|
// }
|
|
// }
|
|
|
|
// #[test]
|
|
// fn test_wrap_line() {
|
|
// let fonts = FontSystem::new();
|
|
// let font_ids = fonts.load_family("Helvetica", &Default::default()).unwrap();
|
|
// let font_id = fonts.select_font(&font_ids, &Default::default()).unwrap();
|
|
|
|
// let line = "one two three four five\n";
|
|
// let wrap_boundaries = fonts.wrap_line(line, font_id, 16., 64.0);
|
|
// assert_eq!(wrap_boundaries, &["one two ".len(), "one two three ".len()]);
|
|
|
|
// let line = "aaa ααα ✋✋✋ 🎉🎉🎉\n";
|
|
// let wrap_boundaries = fonts.wrap_line(line, font_id, 16., 64.0);
|
|
// assert_eq!(
|
|
// wrap_boundaries,
|
|
// &["aaa ααα ".len(), "aaa ααα ✋✋✋ ".len(),]
|
|
// );
|
|
// }
|
|
|
|
// #[test]
|
|
// fn test_layout_line_bom_char() {
|
|
// let fonts = FontSystem::new();
|
|
// let font_ids = fonts.load_family("Helvetica", &Default::default()).unwrap();
|
|
// let style = RunStyle {
|
|
// font_id: fonts.select_font(&font_ids, &Default::default()).unwrap(),
|
|
// color: Default::default(),
|
|
// underline: Default::default(),
|
|
// };
|
|
|
|
// let line = "\u{feff}";
|
|
// let layout = fonts.layout_line(line, 16., &[(line.len(), style)]);
|
|
// assert_eq!(layout.len, line.len());
|
|
// assert!(layout.runs.is_empty());
|
|
|
|
// let line = "a\u{feff}b";
|
|
// let layout = fonts.layout_line(line, 16., &[(line.len(), style)]);
|
|
// assert_eq!(layout.len, line.len());
|
|
// assert_eq!(layout.runs.len(), 1);
|
|
// assert_eq!(layout.runs[0].glyphs.len(), 2);
|
|
// assert_eq!(layout.runs[0].glyphs[0].id, 68); // a
|
|
// // There's no glyph for \u{feff}
|
|
// assert_eq!(layout.runs[0].glyphs[1].id, 69); // b
|
|
// }
|
|
// }
|