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Add a text shaper. No impl yet

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This commit is contained in:
Brian Anderson 2012-05-31 19:40:07 -07:00
parent 4565a37510
commit 7f8573243b
3 changed files with 33 additions and 20 deletions
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1
src/servo/servo.rc
View file

@ -62,6 +62,7 @@ mod text {
mod glyph;
mod text_run;
mod font;
mod shaper;
}
mod util {

28
src/servo/text/shaper.rs Normal file
View file

@ -0,0 +1,28 @@
import libc::types::common::c99::int32_t;
import font::font;
import glyph::{glyph, glyph_pos};
#[doc = "
Calculate the layout metrics associated with a some given text
when rendered in a specific font.
"]
fn shape_text(_font: &font, text: str) -> [glyph] {
let mut glyphs = [];
let mut cur_x = 0u;
for text.each_char {
|ch|
// TODO: Use HarfBuzz!
let hb_pos = {
x_advance: 10 as int32_t,
y_advance: 0 as int32_t,
x_offset: cur_x as int32_t,
y_offset: 0 as int32_t,
var: 0
};
vec::push(glyphs, glyph(ch as uint, glyph_pos(hb_pos)));
cur_x += 10u;
};
ret glyphs;
}

24
src/servo/text/text_run.rs
View file

@ -1,6 +1,6 @@
import libc::{c_void};
import libc::types::common::c99::int32_t;
import text::glyph::{glyph, glyph_pos};
import text::glyph::glyph;
import shaper::shape_text;
#[doc="A single, unbroken line of text."]
class text_run {
@ -17,24 +17,8 @@ class text_run {
line break positions.
"]
fn shape() {
let mut glyphs = [];
let mut cur_x = 0u;
for self.text.each_char {
|ch|
// TODO: Use HarfBuzz!
let hb_pos = {
x_advance: 10 as int32_t,
y_advance: 0 as int32_t,
x_offset: cur_x as int32_t,
y_offset: 0 as int32_t,
var: 0
};
vec::push(glyphs, glyph(ch as uint, glyph_pos(hb_pos)));
cur_x += 10u;
};
self.glyphs = some(/* move */ glyphs);
let font = font::create();
self.glyphs = some(shape_text(&font, self.text));
}
}