Re: display-supports-face-attributes-p question

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Date: Sun, 29 Aug 2021 17:09:48 +0800
> 
> 
> I can't seem to make `display-supports-face-attribute-p' return non-nil
> for '(:slant italic) on window-system frames in the Haiku terminal
> backend I'm working on.
> 
> If my understanding is correct, it should return t if a font driver is able
> to find a font matching the spec (:slant italic), but it's not working.
> 
> Does anyone know what could be wrong here?  Thanks.

Not working in what sense?  Does it fail in
gui_supports_face_attributes_p or does it fail elsewhere?  If it's in
gui_supports_face_attributes_p, can you step through the code there
with a debugger and describe what exactly doesn't work?

Thanks.