move ucs4toindex

Change-Id: I8ae441a68ba74422c607a8830325c3afa954ad92
Reviewed-on: https://gerrit.libreoffice.org/14908
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

1 files changed, 42 insertions, 1 deletions

diff --git a/canvas/source/cairo/cairo_textlayout.cxx b/canvas/source/cairo/cairo_textlayout.cxx
index 9b1fa47ff0d0..936593acf760 100644
--- a/canvas/source/cairo/cairo_textlayout.cxx
+++ b/canvas/source/cairo/cairo_textlayout.cxx
@@ -325,6 +325,47 @@ namespace cairocanvas
         return true;
     }
 
+#ifdef CAIRO_HAS_WIN32_SURFACE
+    namespace
+    {
+        /**
+         * cairo::ucs4toindex: Convert ucs4 char to glyph index
+         * @param ucs4 an ucs4 char
+         * @param hfont current font
+         *
+         * @return true if successful
+         **/
+        unsigned long ucs4toindex(unsigned int ucs4, HFONT hfont)
+        {
+            wchar_t unicode[2];
+            WORD glyph_index;
+            HDC hdc = NULL;
+
+            hdc = CreateCompatibleDC (NULL);
+
+            if (!hdc) return 0;
+            if (!SetGraphicsMode (hdc, GM_ADVANCED))
+            {
+                DeleteDC (hdc);
+                return 0;
+            }
+
+            SelectObject (hdc, hfont);
+            SetMapMode (hdc, MM_TEXT);
+
+            unicode[0] = ucs4;
+            unicode[1] = 0;
+            if (GetGlyphIndicesW (hdc, unicode, 1, &glyph_index, 0) == GDI_ERROR)
+            {
+                glyph_index = 0;
+            }
+
+            DeleteDC (hdc);
+            return glyph_index;
+        }
+    }
+#endif
+
   /**
    * TextLayout::draw
    *
@@ -446,7 +487,7 @@ namespace cairocanvas
 #ifdef CAIRO_HAS_WIN32_SURFACE
                 // Cairo requires standard glyph indexes (ETO_GLYPH_INDEX), while vcl/win/* uses ucs4 chars.
                 // Convert to standard indexes
-                aGlyph.index = cairo::ucs4toindex((unsigned int) aGlyph.index, rSysFontData.hFont);
+                aGlyph.index = ucs4toindex((unsigned int) aGlyph.index, rSysFontData.hFont);
 #endif
                 aGlyph.x = systemGlyph.x;
                 aGlyph.y = systemGlyph.y;