88 lines
2.5 KiB
Rust
88 lines
2.5 KiB
Rust
|
// Copyright 2017 The Servo Project Developers. See the COPYRIGHT
|
||
|
|
// file at the top-level directory of this distribution and at
|
||
|
|
// http://rust-lang.org/COPYRIGHT.
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
||
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
||
|
|
// option. This file may not be copied, modified, or distributed
|
||
|
|
// except according to those terms.
|
||
|
|
|
||
|
|
use compute_shader::buffer::Buffer;
|
||
|
|
use otf::glyf::GlyfTable;
|
||
|
|
use otf::loca::LocaTable;
|
||
|
|
|
||
|
|
pub struct GlyphBuffers {
|
||
|
|
pub coordinates: Vec<(i16, i16)>,
|
||
|
|
pub operations: Vec<u8>,
|
||
|
|
pub descriptors: Vec<GlyphDescriptor>,
|
||
|
|
pub cached_coordinates_buffer: Option<Buffer>,
|
||
|
|
pub cached_operations_buffer: Option<Buffer>,
|
||
|
|
pub cached_descriptors_buffer: Option<Buffer>,
|
||
|
|
}
|
||
|
|
|
||
|
|
impl GlyphBuffers {
|
||
|
|
#[inline]
|
||
|
|
pub fn new() -> GlyphBuffers {
|
||
|
|
GlyphBuffers {
|
||
|
|
coordinates: vec![],
|
||
|
|
operations: vec![],
|
||
|
|
descriptors: vec![],
|
||
|
|
cached_coordinates_buffer: None,
|
||
|
|
cached_operations_buffer: None,
|
||
|
|
cached_descriptors_buffer: None,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn add_glyph(&mut self, glyph_id: u32, loca_table: &LocaTable, glyf_table: &GlyfTable)
|
||
|
|
-> Result<(), ()> {
|
||
|
|
self.cached_coordinates_buffer = None;
|
||
|
|
self.cached_operations_buffer = None;
|
||
|
|
self.cached_descriptors_buffer = None;
|
||
|
|
|
||
|
|
let mut point_index = self.coordinates.len() / 2;
|
||
|
|
let mut operations = if point_index % 4 == 0 {
|
||
|
|
0
|
||
|
|
} else {
|
||
|
|
self.operations.pop().unwrap()
|
||
|
|
};
|
||
|
|
|
||
|
|
try!(glyf_table.for_each_point(loca_table, glyph_id, |point| {
|
||
|
|
self.coordinates.push((point.position.x, point.position.y));
|
||
|
|
|
||
|
|
let operation = if point.first_point_in_contour {
|
||
|
|
0
|
||
|
|
} else if point.on_curve {
|
||
|
|
1
|
||
|
|
} else {
|
||
|
|
2
|
||
|
|
};
|
||
|
|
|
||
|
|
operations |= operation << (point_index % 4 * 2);
|
||
|
|
|
||
|
|
point_index += 1;
|
||
|
|
if point_index % 4 == 0 {
|
||
|
|
self.operations.push(operation)
|
||
|
|
}
|
||
|
|
}));
|
||
|
|
|
||
|
|
if point_index % 4 != 0 {
|
||
|
|
self.operations.push(operations)
|
||
|
|
}
|
||
|
|
|
||
|
|
Ok(())
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[repr(C)]
|
||
|
|
pub struct GlyphDescriptor {
|
||
|
|
pub left: i16,
|
||
|
|
pub bottom: i16,
|
||
|
|
pub width: i16,
|
||
|
|
pub height: i16,
|
||
|
|
pub units_per_em: u16,
|
||
|
|
pub point_count: u16,
|
||
|
|
pub index_of_first_point: u32,
|
||
|
|
}
|
||
|
|
|