[trak] Only adjust around first glyph
Assumes graphemes only have one base glyph.
diff --git a/src/hb-aat-layout-trak-table.hh b/src/hb-aat-layout-trak-table.hh
index 71f169c..dbad449 100644
--- a/src/hb-aat-layout-trak-table.hh
+++ b/src/hb-aat-layout-trak-table.hh
@@ -174,24 +174,24 @@
{
const TrackData &trackData = this+horizData;
float tracking = trackData.get_tracking (this, ptem);
- hb_position_t advance_to_add = c->font->em_scalef_x (tracking / 2);
+ hb_position_t offset_to_add = c->font->em_scalef_x (tracking / 2);
+ hb_position_t advance_to_add = c->font->em_scalef_x (tracking);
foreach_grapheme (buffer, start, end)
{
- buffer->pos[start].x_offset += advance_to_add;
buffer->pos[start].x_advance += advance_to_add;
- buffer->pos[end].x_advance += advance_to_add;
+ buffer->pos[start].x_offset += offset_to_add;
}
}
else
{
const TrackData &trackData = this+vertData;
float tracking = trackData.get_tracking (this, ptem);
- hb_position_t advance_to_add = c->font->em_scalef_y (tracking / 2);
+ hb_position_t offset_to_add = c->font->em_scalef_y (tracking / 2);
+ hb_position_t advance_to_add = c->font->em_scalef_y (tracking);
foreach_grapheme (buffer, start, end)
{
- buffer->pos[start].y_offset += advance_to_add;
buffer->pos[start].y_advance += advance_to_add;
- buffer->pos[end].y_advance += advance_to_add;
+ buffer->pos[start].y_offset += offset_to_add;
}
}
