mirror of
https://github.com/alacritty/alacritty
synced 2024-09-06 00:04:40 +00:00
Implement very basic glyph rasterization
There are several assumptions made at this point and very little (no) error handling done.
This commit is contained in:
parent
32bac94343
commit
5040c44f67
58
Cargo.lock
generated
58
Cargo.lock
generated
|
@ -2,11 +2,16 @@
|
|||
name = "alacritty"
|
||||
version = "0.1.0"
|
||||
dependencies = [
|
||||
"freetype 0.1.0 (git+https://github.com/servo/rust-freetype.git)",
|
||||
"freetype-rs 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"servo-fontconfig 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"servo-fontconfig 0.2.0 (git+https://github.com/jwilm/rust-fontconfig)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "bitflags"
|
||||
version = "0.3.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
|
||||
[[package]]
|
||||
name = "expat-sys"
|
||||
version = "2.1.2"
|
||||
|
@ -17,18 +22,45 @@ dependencies = [
|
|||
]
|
||||
|
||||
[[package]]
|
||||
name = "freetype"
|
||||
version = "0.1.0"
|
||||
source = "git+https://github.com/servo/rust-freetype.git#d564ff90a3c69d987f5c015d7ec034cfaee21aff"
|
||||
name = "freetype-rs"
|
||||
version = "0.5.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"bitflags 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"freetype-sys 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "freetype-sys"
|
||||
version = "0.3.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"libz-sys 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"pkg-config 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "gcc"
|
||||
version = "0.3.24"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
|
||||
[[package]]
|
||||
name = "libc"
|
||||
version = "0.2.7"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
|
||||
[[package]]
|
||||
name = "libz-sys"
|
||||
version = "1.0.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"gcc 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"pkg-config 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "make-cmd"
|
||||
version = "0.1.0"
|
||||
|
@ -42,27 +74,19 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
|
|||
[[package]]
|
||||
name = "servo-fontconfig"
|
||||
version = "0.2.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
source = "git+https://github.com/jwilm/rust-fontconfig#419135e5e1106ec0973dd4923bd9c70d8e438cc8"
|
||||
dependencies = [
|
||||
"libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"servo-fontconfig-sys 2.11.3 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"servo-fontconfig-sys 2.11.3 (git+https://github.com/jwilm/libfontconfig)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "servo-fontconfig-sys"
|
||||
version = "2.11.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
source = "git+https://github.com/jwilm/libfontconfig#1d7544dc1ff6a7d0f3a9e6a27b5373a89afa8c38"
|
||||
dependencies = [
|
||||
"expat-sys 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"pkg-config 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"servo-freetype-sys 2.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "servo-freetype-sys"
|
||||
version = "2.4.11"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"freetype-sys 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"pkg-config 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
|
|
|
@ -4,6 +4,6 @@ version = "0.1.0"
|
|||
authors = ["Joe Wilm <joe@jwilm.com>"]
|
||||
|
||||
[dependencies]
|
||||
servo-fontconfig = "0.2"
|
||||
freetype = { git = "https://github.com/servo/rust-freetype.git" }
|
||||
servo-fontconfig = { git = "https://github.com/jwilm/rust-fontconfig" }
|
||||
freetype-rs = "0.5.0"
|
||||
libc = "*"
|
||||
|
|
|
@ -69,12 +69,31 @@ pub struct Variant {
|
|||
index: usize,
|
||||
}
|
||||
|
||||
impl Variant {
|
||||
#[inline]
|
||||
pub fn filepath(&self) -> &::std::path::Path {
|
||||
self.file.as_path()
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
pub struct Family {
|
||||
name: String,
|
||||
variants: Vec<Variant>,
|
||||
}
|
||||
|
||||
impl Family {
|
||||
#[inline]
|
||||
pub fn name(&self) -> &str {
|
||||
&self.name[..]
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn variants(&self) -> &[Variant] {
|
||||
&self.variants[..]
|
||||
}
|
||||
}
|
||||
|
||||
static FILE: &'static [u8] = b"file\0";
|
||||
static FAMILY: &'static [u8] = b"family\0";
|
||||
static INDEX: &'static [u8] = b"index\0";
|
||||
|
|
|
@ -3,6 +3,7 @@ extern crate freetype;
|
|||
extern crate libc;
|
||||
|
||||
mod list_fonts;
|
||||
mod text;
|
||||
|
||||
fn main() {
|
||||
println!("Hello, world!");
|
||||
|
|
81
src/text.rs
Normal file
81
src/text.rs
Normal file
|
@ -0,0 +1,81 @@
|
|||
use list_fonts::get_font_families;
|
||||
|
||||
use freetype::Library;
|
||||
use freetype::Face;
|
||||
use freetype;
|
||||
|
||||
/// Rasterizes glyphs for a single font face.
|
||||
pub struct Rasterizer {
|
||||
face: Face<'static>,
|
||||
library: Library,
|
||||
}
|
||||
|
||||
#[inline]
|
||||
fn to_freetype_26_6(f: f32) -> isize {
|
||||
((1i32 << 6) as f32 * f) as isize
|
||||
}
|
||||
|
||||
impl Rasterizer {
|
||||
pub fn new() -> Rasterizer {
|
||||
let library = Library::init().unwrap();
|
||||
|
||||
let family = get_font_families().into_iter()
|
||||
.filter(|f| f.name() == "Inconsolata-dz")
|
||||
.nth(0).unwrap(); // TODO
|
||||
|
||||
let variant = family.variants().first().unwrap();
|
||||
let path = variant.filepath();
|
||||
|
||||
Rasterizer {
|
||||
face: library.new_face(path, 0).expect("Create font face"),
|
||||
library: library,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn get_glyph(&self, size: f32, c: char) -> RasterizedGlyph {
|
||||
// TODO DPI
|
||||
self.face.set_char_size(to_freetype_26_6(size), 0, 96, 0).unwrap();
|
||||
self.face.load_char(c as usize, freetype::face::RENDER).unwrap();
|
||||
let glyph = self.face.glyph();
|
||||
|
||||
RasterizedGlyph {
|
||||
top: glyph.bitmap_top() as usize,
|
||||
left: glyph.bitmap_left() as usize,
|
||||
width: glyph.bitmap().width() as usize,
|
||||
height: glyph.bitmap().rows() as usize,
|
||||
buf: glyph.bitmap().buffer().to_vec(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
struct RasterizedGlyph {
|
||||
width: usize,
|
||||
height: usize,
|
||||
top: usize,
|
||||
left: usize,
|
||||
buf: Vec<u8>,
|
||||
}
|
||||
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::Rasterizer;
|
||||
|
||||
#[test]
|
||||
fn create_rasterizer_and_render_glyph() {
|
||||
let rasterizer = Rasterizer::new();
|
||||
let glyph = rasterizer.get_glyph(24., 'U');
|
||||
|
||||
println!("glyph: {:?}", glyph);
|
||||
|
||||
for j in 0..glyph.height {
|
||||
for i in 0..glyph.width {
|
||||
let val = glyph.buf[j * glyph.width + i];
|
||||
print!("{}", if val < 122 { " " } else { "%"});
|
||||
}
|
||||
|
||||
print!("\n");
|
||||
}
|
||||
}
|
||||
}
|
Loading…
Reference in a new issue