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[graphite] Ensure native direction 

Mirrored characters come out wrong. Oh well. Better than before though.
This commit is contained in:
Behdad Esfahbod 2023-02-24 13:15:11 -07:00
parent 39f8703df1
commit cbc71c56bc
1 changed files with 16 additions and 2 deletions
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18
src/hb-graphite2.cc
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@ -248,6 +248,21 @@ _hb_graphite2_shape (hb_shape_plan_t *shape_plan HB_UNUSED,
gr_fref_set_feature_value (fref, features[i].value, feats); gr_fref_set_feature_value (fref, features[i].value, feats);
} }
hb_direction_t target_direction = buffer->props.direction;
hb_direction_t horiz_dir = hb_script_get_horizontal_direction (buffer->props.script);
/* TODO vertical:
* The only BTT vertical script is Ogham, but it's not clear to me whether OpenType
* Ogham fonts are supposed to be implemented BTT or not. Need to research that
* first. */
if ((HB_DIRECTION_IS_HORIZONTAL (target_direction) &&
target_direction != horiz_dir && horiz_dir != HB_DIRECTION_INVALID) ||
(HB_DIRECTION_IS_VERTICAL (target_direction) &&
target_direction != HB_DIRECTION_TTB))
{
hb_buffer_reverse_clusters (buffer);
buffer->props.direction = HB_DIRECTION_REVERSE (buffer->props.direction);
}
gr_segment *seg = nullptr; gr_segment *seg = nullptr;
const gr_slot *is; const gr_slot *is;
unsigned int ci = 0, ic = 0; unsigned int ci = 0, ic = 0;
@ -261,8 +276,6 @@ _hb_graphite2_shape (hb_shape_plan_t *shape_plan HB_UNUSED,
for (unsigned int i = 0; i < buffer->len; ++i) for (unsigned int i = 0; i < buffer->len; ++i)
chars[i] = buffer->info[i].codepoint; chars[i] = buffer->info[i].codepoint;
/* TODO ensure_native_direction. */
seg = gr_make_seg (nullptr, grface, seg = gr_make_seg (nullptr, grface,
HB_TAG_NONE, // https://github.com/harfbuzz/harfbuzz/issues/3439#issuecomment-1442650148 HB_TAG_NONE, // https://github.com/harfbuzz/harfbuzz/issues/3439#issuecomment-1442650148
feats, feats,
@ -433,6 +446,7 @@ _hb_graphite2_shape (hb_shape_plan_t *shape_plan HB_UNUSED,
buffer->clear_glyph_flags (); buffer->clear_glyph_flags ();
buffer->unsafe_to_break (); buffer->unsafe_to_break ();
buffer->props.direction = target_direction;
return true; return true;
} }