Part of Bug 135683 – Cache glyphstring extents

Part of Bug 135683 – Cache glyphstring extents

2006-07-08  Behdad Esfahbod  <behdad@gnome.org>

        Part of Bug 135683 – Cache glyphstring extents

        * docs/pango-sections.txt:
        * docs/tmpl/glyphs.sgml:
        * pango/pango.def:
        * pango/pango-glyph.h:
        * pango/glyphstring.c (pango_glyph_string_get_width): New function.
        Much faster than calling pango_glyph_string_extents and using
        logical_rect.width.

        * pango/pango-renderer.c (add_underline), (add_strikethrough),
        (pango_renderer_draw_layout_line): Use the new function for
        optimization.