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Basic support for bidirectional text

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This commit is contained in:
Matt Brubeck 2015-06-26 08:19:29 -07:00
parent b386d7ae44
commit dfac8ce4a1
20 changed files with 309 additions and 107 deletions
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10
components/gfx/text/shaping/harfbuzz.rs
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@ -5,14 +5,14 @@
extern crate harfbuzz;
use font::{DISABLE_KERNING_SHAPING_FLAG, Font, FontHandleMethods, FontTableMethods, FontTableTag};
use font::{IGNORE_LIGATURES_SHAPING_FLAG, ShapingOptions};
use font::{IGNORE_LIGATURES_SHAPING_FLAG, RTL_FLAG, ShapingOptions};
use platform::font::FontTable;
use text::glyph::{CharIndex, GlyphStore, GlyphId, GlyphData};
use text::shaping::ShaperMethods;
use text::util::{float_to_fixed, fixed_to_float};
use euclid::Point2D;
use harfbuzz::{HB_MEMORY_MODE_READONLY, HB_DIRECTION_LTR};
use harfbuzz::{HB_MEMORY_MODE_READONLY, HB_DIRECTION_LTR, HB_DIRECTION_RTL};
use harfbuzz::{RUST_hb_blob_create, RUST_hb_face_create_for_tables};
use harfbuzz::{hb_blob_t};
use harfbuzz::{hb_bool_t};
@ -229,7 +229,11 @@ impl ShaperMethods for Shaper {
fn shape_text(&self, text: &str, options: &ShapingOptions, glyphs: &mut GlyphStore) {
unsafe {
let hb_buffer: *mut hb_buffer_t = RUST_hb_buffer_create();
RUST_hb_buffer_set_direction(hb_buffer, HB_DIRECTION_LTR);
RUST_hb_buffer_set_direction(hb_buffer, if options.flags.contains(RTL_FLAG) {
HB_DIRECTION_RTL
} else {
HB_DIRECTION_LTR
});
RUST_hb_buffer_add_utf8(hb_buffer,
text.as_ptr() as *const c_char,