tdf#95194: We need to set the GF flags in UniscribeLayout::GetNextGlyphs()

The old SimpleWinLayout::GetNextGlyphs() did it.
PDFWriterImpl::drawVerticalGlyphs() expects GF_ROTL etc to be set when
necessary for vertical text when exporting to PDF.

Change-Id: I1971dd2784efa3cd7274a32a51f61fdf197ec81a
Reviewed-on: https://gerrit.libreoffice.org/20329Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

vcl/win/source/gdi/winlayout.cxx

@@ -700,6 +700,8 @@ UniscribeLayout::~UniscribeLayout()
 
 bool UniscribeLayout::LayoutText( ImplLayoutArgs& rArgs )
 {
+    msTheString = OUString(rArgs.mpStr, rArgs.mnLength);
+
     // for a base layout only the context glyphs have to be dropped
     // => when the whole string is involved there is no extra context
     typedef std::vector<int> TIntVector;
@@ -1401,6 +1403,9 @@ int UniscribeLayout::GetNextGlyphs( int nLen, sal_GlyphId* pGlyphs, Point& rPos,
         }
 
         // update return values
+        if( (mnLayoutFlags & SalLayoutFlags::Vertical) &&
+            nCharPos != -1 )
+            aGlyphId |= GetVerticalFlags( msTheString[nCharPos] );
         *(pGlyphs++) = aGlyphId;
         if( pGlyphAdvances )
             *(pGlyphAdvances++) = nGlyphWidth;

vcl/win/source/gdi/winlayout.hxx

@@ -110,6 +110,7 @@ private:
 
     // string specific info
     // everything is in logical order
+    OUString        msTheString;        // Sadly we need it in GetNextGlyphs(), to be able to call GetVerticalFlags()
     int             mnCharCapacity;
     WORD*           mpLogClusters;      // map from absolute_char_pos to relative_glyph_pos
     int*            mpCharWidths;       // map from absolute_char_pos to char_width