[cairo] Re: Drawing text with Windows bitmap fonts
jslupski at gmail.com
Mon Jan 22 19:08:37 PST 2007
Jan Slupski wrote:
> Stuart Parmenter wrote:
> > Has anyone gotten win32 bitmap fonts to render using cairo? I'm using
> > cairo_show_glyphs() with glyph indexes I've gotten from Uniscribe.
> > Things fall apart in _cairo_win32_scaled_font_init_glyph_metrics in
> > cairo-win32-font.c when it tries to do GetGlyphOutlineW(). According
> > to the MSDN docs, using GGO_GLYPH_INDEX means that it is a true type
> > index, which I'm not sure if bitmap fonts really respect.
> > GetGlyphOutlineW ends up failing... I could be going down the wrong
> > path here.. was wondering if anyone else had done more digging or had
> > any suggestions.
> Indeed, it seems that support for bitmap fonts is somewhat broken.
> I am trying to open Windows font called "Small Fonts" (smalle.fon).
> As stated above, cairo is using _scaled_* functions to operate
> on that font that seems to be wrong by definition.
> This ends up on querying the font with GetGlyphOutlineW that
> by MSDN definition "The GetGlyphOutline function retrieves the outline
> or bitmap for a character in the *TrueType* font".
> I think cairo should either properly support windows bitmap fonts
> (ignoring font size & rotation?), or fail in more meaningful way. It
> could be either return of an error by cairo's API call, or fallback to a
> default font in the same way as when unknown font name is passed.
I have opened a bug report for that issue at:
Also I have proposed a (temporary?) workaround that forces Windows to
choose closes matching font from among TrueType fonts only.
CreateFontIndirect parameter OUT_TT_ONLY_PRECIS: Instructs the font
mapper to choose from only TrueType fonts. If there are no TrueType
fonts installed in the system, the font mapper returns to default behavior.
All the best,
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