diff options
Diffstat (limited to 'third_party/harfbuzz/src/harfbuzz-shaper.cpp')
| -rw-r--r-- | third_party/harfbuzz/src/harfbuzz-shaper.cpp | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/third_party/harfbuzz/src/harfbuzz-shaper.cpp b/third_party/harfbuzz/src/harfbuzz-shaper.cpp index 2b0dfde..f1606e6 100644 --- a/third_party/harfbuzz/src/harfbuzz-shaper.cpp +++ b/third_party/harfbuzz/src/harfbuzz-shaper.cpp @@ -1189,6 +1189,24 @@ HB_Bool HB_OpenTypeShape(HB_ShaperItem *item, const hb_uint32 *properties) return true; } +/* See comments near the definition of HB_ShaperFlag_ForceMarksToZeroWidth for a description + of why this function exists. */ +void HB_FixupZeroWidth(HB_ShaperItem *item) +{ + HB_UShort property; + + if (!item->face->gdef) + return; + + for (unsigned int i = 0; i < item->num_glyphs; ++i) { + /* If the glyph is a mark, force its advance to zero. */ + if (HB_GDEF_Get_Glyph_Property (item->face->gdef, item->glyphs[i], &property) == HB_Err_Ok && + property == HB_GDEF_MARK) { + item->advances[i] = 0; + } + } +} + HB_Bool HB_OpenTypePosition(HB_ShaperItem *item, int availableGlyphs, HB_Bool doLogClusters) { HB_Face face = item->face; @@ -1203,6 +1221,8 @@ HB_Bool HB_OpenTypePosition(HB_ShaperItem *item, int availableGlyphs, HB_Bool do if (!face->glyphs_substituted && !glyphs_positioned) { HB_GetGlyphAdvances(item); + if (item->face->current_flags & HB_ShaperFlag_ForceMarksToZeroWidth) + HB_FixupZeroWidth(item); return true; // nothing to do for us } |