[harfbuzz] Fix vertical text layout

"Fixed" in the sense that it works exactly like the non-HarfBuzz case,
but that is already a bit broken. Need to get rid if the little OpenType
layout engine in ServerFont::ApplyGSUB() and use HarfBuzz's vertical
text layout capabilities.

Change-Id: I32abe385575bd5d1b66e573dfe2fc7f412d02254

1 files changed, 9 insertions, 0 deletions

diff --git a/vcl/generic/glyphs/gcach_layout.cxx b/vcl/generic/glyphs/gcach_layout.cxx
index fab66ac23920..f7b69073c858 100644
--- a/vcl/generic/glyphs/gcach_layout.cxx
+++ b/vcl/generic/glyphs/gcach_layout.cxx
@@ -501,6 +501,15 @@ bool HbLayoutEngine::layout(ServerFontLayout& rLayout, ImplLayoutArgs& rArgs)
                     continue;
             }
 
+            // apply vertical flags and glyph substitution
+            // XXX: Use HB_DIRECTION_TTB above and apply whatever flags magic
+            // FixupGlyphIndex() is doing, minus the GSUB part.
+            if (nCharPos >= 0)
+            {
+                sal_UCS4 aChar = rArgs.mpStr[nCharPos];
+                nGlyphIndex = rFont.FixupGlyphIndex(nGlyphIndex, aChar);
+            }
+
             bool bInCluster = false;
             if (i > 0 && pHbGlyphInfos[i].cluster == pHbGlyphInfos[i - 1].cluster)
                 bInCluster = true;