Initial work on the font renderer component
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parent
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/target
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/font-renderer/target
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/partitioner/target
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Cargo.lock
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Cargo.lock
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# Editors
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# Editors
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*.swp
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# IntelliJ
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# IntelliJ
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.idea
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.idea
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[package]
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name = "pathfinder_server"
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version = "0.1.0"
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authors = ["Patrick Walton <pcwalton@mimiga.net>"]
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[dependencies]
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fn main() {
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println!("Hello, world!");
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}
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[package]
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name = "pathfinder_font_renderer"
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version = "0.1.0"
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authors = ["Patrick Walton <pcwalton@mimiga.net>"]
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[dependencies]
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app_units = "0.5"
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euclid = "0.15"
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[dependencies.freetype-sys]
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git = "https://github.com/pcwalton/freetype-sys.git"
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branch = "outline-get-cbox"
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@ -0,0 +1,340 @@
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|
GNU GENERAL PUBLIC LICENSE
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|
Version 2, June 1991
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Copyright (C) 1989, 1991 Free Software Foundation, Inc.
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59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Everyone is permitted to copy and distribute verbatim copies
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The licenses for most software are designed to take away your
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||||||
|
The hypothetical commands `show w' and `show c' should show the appropriate
|
||||||
|
parts of the General Public License. Of course, the commands you use may
|
||||||
|
be called something other than `show w' and `show c'; they could even be
|
||||||
|
mouse-clicks or menu items--whatever suits your program.
|
||||||
|
|
||||||
|
You should also get your employer (if you work as a programmer) or your
|
||||||
|
school, if any, to sign a "copyright disclaimer" for the program, if
|
||||||
|
necessary. Here is a sample; alter the names:
|
||||||
|
|
||||||
|
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
|
||||||
|
`Gnomovision' (which makes passes at compilers) written by James Hacker.
|
||||||
|
|
||||||
|
<signature of Ty Coon>, 1 April 1989
|
||||||
|
Ty Coon, President of Vice
|
||||||
|
|
||||||
|
This General Public License does not permit incorporating your program into
|
||||||
|
proprietary programs. If your program is a subroutine library, you may
|
||||||
|
consider it more useful to permit linking proprietary applications with the
|
||||||
|
library. If this is what you want to do, use the GNU Library General
|
||||||
|
Public License instead of this License.
|
Binary file not shown.
|
@ -0,0 +1,51 @@
|
||||||
|
Cyrillized free URW fonts.
|
||||||
|
|
||||||
|
These fonts were made from the free URW fonts distributed with ghostcript.
|
||||||
|
There are NO changes in the latin part of them (I hope).
|
||||||
|
Cyrillic glyphs were added by copying suitable latin ones
|
||||||
|
and painting oulines of unique cyrillic glyphs in same style as the others.
|
||||||
|
For all modification pfaedit was used.
|
||||||
|
The license for result is (of course) same as for original fonts,
|
||||||
|
i.e. GPL with an exception that you can put these fonts in your own non-GPLed
|
||||||
|
documents. (Looks like LGPL from my point of view =).
|
||||||
|
|
||||||
|
The "sources" of these fonts in the native pfaedit format are available
|
||||||
|
at ftp://ftp.gnome.ru/fonts/sources
|
||||||
|
|
||||||
|
The great font editor pfaedit is available at http://pfaedit.sf.net.
|
||||||
|
That page also includes some links to fonts created by
|
||||||
|
George Williams -- the author of pfaedit.
|
||||||
|
|
||||||
|
Acknowledgements:
|
||||||
|
I would like to thank George Williams, the pfaedit's author and developer.
|
||||||
|
He is the most bug-reporter/feature-requester friendly developer
|
||||||
|
I ever saw in my not so short life. At some moment in the future
|
||||||
|
I must write a book about him: "George Williams and my best experience
|
||||||
|
in bug-reporting." George also greatly helped me bug-hunting these fonts,
|
||||||
|
explained to me some very important things about fonts and font design,
|
||||||
|
quickly adopted pfaedit to my needs (or pointed me to The Right Place in
|
||||||
|
documentation where I found better way of doing things).
|
||||||
|
|
||||||
|
I would like to thank Alexey Novodvorsky (aka AEN), who
|
||||||
|
pointed me to pfaedit and George Williams' fonts, explained
|
||||||
|
The Task to me. He is also one of the main participators in the
|
||||||
|
development of Sysiphus -- free repository of free software.
|
||||||
|
I didn't loose my time for compiling/installing and supporting
|
||||||
|
my linux box coz I used the result of Sysiphus developers' works.
|
||||||
|
|
||||||
|
I would like to thank Sergey Vlasov, who tested these fonts and reported
|
||||||
|
about bugs. Also he help me to make some bug-reports to George about
|
||||||
|
pfaedit bugs.
|
||||||
|
|
||||||
|
I would like Dmitry 40in, who did big QA for some font outlines, drawn some glyphs,
|
||||||
|
and explain some The Truths for me.
|
||||||
|
|
||||||
|
I would like to thank Vlad Harchev (aka hvv), who
|
||||||
|
proofread this text for me.
|
||||||
|
|
||||||
|
Also I have to thank RMS for GPL and URW for releasing the fonts
|
||||||
|
under it.
|
||||||
|
|
||||||
|
Thank you very much!
|
||||||
|
Valek Filippov frob@df.ru
|
||||||
|
(C)opyLeft 2001
|
|
@ -0,0 +1,224 @@
|
||||||
|
// pathfinder/font-renderer/lib.rs
|
||||||
|
|
||||||
|
extern crate app_units;
|
||||||
|
extern crate euclid;
|
||||||
|
extern crate freetype_sys;
|
||||||
|
|
||||||
|
use app_units::Au;
|
||||||
|
use euclid::{Point2D, Size2D};
|
||||||
|
use freetype_sys::{FT_BBox, FT_Done_Face, FT_F26Dot6, FT_Face, FT_GLYPH_FORMAT_OUTLINE};
|
||||||
|
use freetype_sys::{FT_GlyphSlot, FT_Init_FreeType, FT_Int32, FT_LOAD_TARGET_LIGHT, FT_Library};
|
||||||
|
use freetype_sys::{FT_Load_Glyph, FT_Long, FT_New_Memory_Face, FT_Outline_Get_CBox};
|
||||||
|
use freetype_sys::{FT_Set_Char_Size, FT_UInt};
|
||||||
|
use std::collections::BTreeMap;
|
||||||
|
use std::collections::btree_map::Entry;
|
||||||
|
use std::mem;
|
||||||
|
use std::ptr;
|
||||||
|
use std::sync::atomic::{ATOMIC_USIZE_INIT, AtomicUsize, Ordering};
|
||||||
|
|
||||||
|
#[cfg(test)]
|
||||||
|
mod tests;
|
||||||
|
|
||||||
|
// Default to slight hinting.
|
||||||
|
//
|
||||||
|
// TODO(pcwalton): Make this configurable.
|
||||||
|
const GLYPH_LOAD_FLAGS: FT_Int32 = FT_LOAD_TARGET_LIGHT;
|
||||||
|
|
||||||
|
pub struct FontContext {
|
||||||
|
library: FT_Library,
|
||||||
|
faces: BTreeMap<FontKey, Face>,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl FontContext {
|
||||||
|
pub fn new() -> FontContext {
|
||||||
|
let mut library: FT_Library = ptr::null_mut();
|
||||||
|
unsafe {
|
||||||
|
let result = FT_Init_FreeType(&mut library);
|
||||||
|
assert!(result == 0, "Unable to initialize FreeType");
|
||||||
|
}
|
||||||
|
FontContext {
|
||||||
|
library: library,
|
||||||
|
faces: BTreeMap::new(),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn add_font_from_memory(&mut self, font_key: &FontKey, bytes: Vec<u8>, font_index: u32)
|
||||||
|
-> Result<(), ()> {
|
||||||
|
match self.faces.entry(*font_key) {
|
||||||
|
Entry::Occupied(_) => Ok(()),
|
||||||
|
Entry::Vacant(entry) => {
|
||||||
|
unsafe {
|
||||||
|
let mut face = Face {
|
||||||
|
face: ptr::null_mut(),
|
||||||
|
bytes: bytes,
|
||||||
|
};
|
||||||
|
let result = FT_New_Memory_Face(self.library,
|
||||||
|
face.bytes.as_ptr(),
|
||||||
|
face.bytes.len() as FT_Long,
|
||||||
|
font_index as FT_Long,
|
||||||
|
&mut face.face);
|
||||||
|
if result == 0 && !face.face.is_null() {
|
||||||
|
entry.insert(face);
|
||||||
|
Ok(())
|
||||||
|
} else {
|
||||||
|
Err(())
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn delete_font(&mut self, font_key: &FontKey) {
|
||||||
|
self.faces.remove(font_key);
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn glyph_dimensions(&self, font_instance: &FontInstanceKey, glyph_key: &GlyphKey)
|
||||||
|
-> Option<GlyphDimensions> {
|
||||||
|
self.load_glyph(font_instance, glyph_key).and_then(|glyph_slot| {
|
||||||
|
self.glyph_dimensions_from_slot(font_instance, glyph_key, glyph_slot)
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
fn load_glyph(&self, font_instance: &FontInstanceKey, glyph_key: &GlyphKey)
|
||||||
|
-> Option<FT_GlyphSlot> {
|
||||||
|
let face = match self.faces.get(&font_instance.font_key) {
|
||||||
|
None => return None,
|
||||||
|
Some(face) => face,
|
||||||
|
};
|
||||||
|
|
||||||
|
unsafe {
|
||||||
|
FT_Set_Char_Size(face.face, font_instance.size.to_ft_f26dot6(), 0, 0, 0);
|
||||||
|
|
||||||
|
if FT_Load_Glyph(face.face, glyph_key.glyph_index as FT_UInt, GLYPH_LOAD_FLAGS) != 0 {
|
||||||
|
return None
|
||||||
|
}
|
||||||
|
|
||||||
|
let slot = (*face.face).glyph;
|
||||||
|
if (*slot).format != FT_GLYPH_FORMAT_OUTLINE {
|
||||||
|
return None
|
||||||
|
}
|
||||||
|
|
||||||
|
Some(slot)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn glyph_dimensions_from_slot(&self,
|
||||||
|
font_instance: &FontInstanceKey,
|
||||||
|
glyph_key: &GlyphKey,
|
||||||
|
glyph_slot: FT_GlyphSlot)
|
||||||
|
-> Option<GlyphDimensions> {
|
||||||
|
unsafe {
|
||||||
|
let metrics = &(*glyph_slot).metrics;
|
||||||
|
|
||||||
|
// This matches what WebRender does.
|
||||||
|
if metrics.horiAdvance == 0 {
|
||||||
|
return None
|
||||||
|
}
|
||||||
|
|
||||||
|
let bounding_box = self.bounding_box_from_slot(font_instance, glyph_key, glyph_slot);
|
||||||
|
Some(GlyphDimensions {
|
||||||
|
origin: Point2D::new((bounding_box.xMin >> 6) as i32,
|
||||||
|
(bounding_box.yMax >> 6) as i32),
|
||||||
|
size: Size2D::new(((bounding_box.xMax - bounding_box.xMin) >> 6) as u32,
|
||||||
|
((bounding_box.yMax - bounding_box.yMin) >> 6) as u32),
|
||||||
|
advance: metrics.horiAdvance as f32 / 64.0,
|
||||||
|
})
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Returns the bounding box for a glyph, accounting for subpixel positioning as appropriate.
|
||||||
|
//
|
||||||
|
// TODO(pcwalton): Subpixel positioning.
|
||||||
|
fn bounding_box_from_slot(&self, _: &FontInstanceKey, _: &GlyphKey, glyph_slot: FT_GlyphSlot)
|
||||||
|
-> FT_BBox {
|
||||||
|
let mut bounding_box: FT_BBox;
|
||||||
|
unsafe {
|
||||||
|
bounding_box = mem::zeroed();
|
||||||
|
FT_Outline_Get_CBox(&(*glyph_slot).outline, &mut bounding_box);
|
||||||
|
};
|
||||||
|
|
||||||
|
// Outset the box to device pixel boundaries. This matches what WebRender does.
|
||||||
|
bounding_box.xMin &= !0x3f;
|
||||||
|
bounding_box.yMin &= !0x3f;
|
||||||
|
bounding_box.xMax = (bounding_box.xMax + 0x3f) & !0x3f;
|
||||||
|
bounding_box.yMax = (bounding_box.yMax + 0x3f) & !0x3f;
|
||||||
|
|
||||||
|
bounding_box
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Clone, Copy, Debug, PartialEq, PartialOrd, Eq, Ord)]
|
||||||
|
pub struct FontKey {
|
||||||
|
id: usize,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl FontKey {
|
||||||
|
pub fn new() -> FontKey {
|
||||||
|
static NEXT_FONT_KEY_ID: AtomicUsize = ATOMIC_USIZE_INIT;
|
||||||
|
FontKey {
|
||||||
|
id: NEXT_FONT_KEY_ID.fetch_add(1, Ordering::Relaxed),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Clone, Copy, Debug, PartialEq)]
|
||||||
|
pub struct FontInstanceKey {
|
||||||
|
pub font_key: FontKey,
|
||||||
|
pub size: Au,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl FontInstanceKey {
|
||||||
|
#[inline]
|
||||||
|
pub fn new(font_key: &FontKey, size: Au) -> FontInstanceKey {
|
||||||
|
FontInstanceKey {
|
||||||
|
font_key: *font_key,
|
||||||
|
size: size,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// TODO(pcwalton): Subpixel offsets.
|
||||||
|
#[derive(Clone, Copy, PartialEq)]
|
||||||
|
pub struct GlyphKey {
|
||||||
|
pub glyph_index: u32,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl GlyphKey {
|
||||||
|
#[inline]
|
||||||
|
pub fn new(glyph_index: u32) -> GlyphKey {
|
||||||
|
GlyphKey {
|
||||||
|
glyph_index: glyph_index,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[repr(C)]
|
||||||
|
#[derive(Clone, Copy, Debug, PartialEq)]
|
||||||
|
pub struct GlyphDimensions {
|
||||||
|
pub origin: Point2D<i32>,
|
||||||
|
pub size: Size2D<u32>,
|
||||||
|
pub advance: f32,
|
||||||
|
}
|
||||||
|
|
||||||
|
struct Face {
|
||||||
|
face: FT_Face,
|
||||||
|
bytes: Vec<u8>,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Drop for Face {
|
||||||
|
fn drop(&mut self) {
|
||||||
|
unsafe {
|
||||||
|
FT_Done_Face(self.face);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
trait ToFtF26Dot6 {
|
||||||
|
fn to_ft_f26dot6(&self) -> FT_F26Dot6;
|
||||||
|
}
|
||||||
|
|
||||||
|
impl ToFtF26Dot6 for Au {
|
||||||
|
fn to_ft_f26dot6(&self) -> FT_F26Dot6 {
|
||||||
|
(self.to_f64_px() * 64.0 + 0.5) as FT_F26Dot6
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,36 @@
|
||||||
|
// pathfinder/font-renderer/src/tests.rs
|
||||||
|
|
||||||
|
use app_units::Au;
|
||||||
|
use euclid::Size2D;
|
||||||
|
use std::fs::File;
|
||||||
|
use std::io::Read;
|
||||||
|
use {FontContext, FontInstanceKey, FontKey, GlyphDimensions, GlyphKey};
|
||||||
|
|
||||||
|
static TEST_FONT_PATH: &'static str = "resources/tests/nimbus-sans/NimbusSanL-Regu.ttf";
|
||||||
|
const TEST_FONT_SIZE: Au = Au(60 * 16);
|
||||||
|
const TEST_FIRST_GLYPH_INDEX: u32 = 0x1f;
|
||||||
|
|
||||||
|
// Nimbus Sans Regular 16pt., 'A'
|
||||||
|
const EXPECTED_GLYPH_ORIGIN: [i32; 2] = [1, 12];
|
||||||
|
const EXPECTED_GLYPH_SIZE: [u32; 2] = [8, 12];
|
||||||
|
const EXPECTED_GLYPH_ADVANCE: f32 = 9.0;
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn test_font_context_glyph_dimensions() {
|
||||||
|
let mut font_context = FontContext::new();
|
||||||
|
|
||||||
|
let font_key = FontKey::new();
|
||||||
|
let mut bytes = vec![];
|
||||||
|
File::open(TEST_FONT_PATH).unwrap().read_to_end(&mut bytes).unwrap();
|
||||||
|
font_context.add_font_from_memory(&font_key, bytes, 0).unwrap();
|
||||||
|
|
||||||
|
let font_instance = FontInstanceKey::new(&font_key, TEST_FONT_SIZE);
|
||||||
|
let glyph_key = GlyphKey::new('A' as u32 - TEST_FIRST_GLYPH_INDEX);
|
||||||
|
let glyph_dimensions = font_context.glyph_dimensions(&font_instance, &glyph_key).unwrap();
|
||||||
|
|
||||||
|
assert_eq!(glyph_dimensions, GlyphDimensions {
|
||||||
|
origin: EXPECTED_GLYPH_ORIGIN.into(),
|
||||||
|
size: Size2D::new(EXPECTED_GLYPH_SIZE[0], EXPECTED_GLYPH_SIZE[1]),
|
||||||
|
advance: EXPECTED_GLYPH_ADVANCE,
|
||||||
|
})
|
||||||
|
}
|
Loading…
Reference in New Issue