[cairo] Re: Drawing text with Windows bitmap fonts

Jan Slupski 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.

Hi again,

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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