Fix combining marks shaping without GPOS feature in HarfBuzz

For certain OpenType fonts like DejaVu Sans Mono, not all
combining marks has GPOS feature applied, U+0062 U+0332
is one of the case. Only getting the advances for indivivual
glyphs is not enough, we should also do heuristic positioning
to put the combining mark in the right place.

Task-number: QTBUG-15675
Reviewed-by: Lars Knoll

1 files changed, 1 insertions, 1 deletions

diff --git a/src/3rdparty/harfbuzz/src/harfbuzz-shaper.cpp b/src/3rdparty/harfbuzz/src/harfbuzz-shaper.cpp
index ef86144..6c4d9f1 100644
--- a/src/3rdparty/harfbuzz/src/harfbuzz-shaper.cpp
+++ b/src/3rdparty/harfbuzz/src/harfbuzz-shaper.cpp
@@ -1232,7 +1232,7 @@ HB_Bool HB_OpenTypePosition(HB_ShaperItem *item, int availableGlyphs, HB_Bool do
     }
 
     if (!face->glyphs_substituted && !glyphs_positioned) {
-        HB_GetGlyphAdvances(item);
+        HB_HeuristicPosition(item);
         return true; // nothing to do for us
     }