`raise' property

`raise' property

[David Reitter]

Could someone check if the `raise' text display property works properly on X11?

On NS, it is not in 23/24, and I'm having a hard time seeing how xdisp.c handles this.  take_vertical_position_into_account() sets it->ascent / it->descent, but I don't understand how it ends up in a glyph string's "y", or how else the vertical position defined by ascent is set.  Does the font driver have to do something with it?

FWIW, I've had several bug reports from Aquamacs users because of broken super/subscripts in LaTeX (AUCTeX).
This:  (set-text-properties (region-beginning) (region-end) '(display (raise 0.3)))  does not change the appearance of text (it works in Carbon Emacs 22).

Re: `raise' property

[tomas]

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On Tue, Sep 14, 2010 at 11:12:35AM -0400, David Reitter wrote:
> Could someone check if the `raise' text display property works properly on X11?
> 
> On NS, it is not in 23/24, and I'm having a hard time seeing how xdisp.c handles this.  take_vertical_position_into_account() sets it->ascent / it->descent, but I don't understand how it ends up in a glyph string's "y", or how else the vertical position defined by ascent is set.  Does the font driver have to do something with it?
> 
> FWIW, I've had several bug reports from Aquamacs users because of broken super/subscripts in LaTeX (AUCTeX).
> This:  (set-text-properties (region-beginning) (region-end) '(display (raise 0.3)))  does not change the appearance of text (it works in Carbon Emacs 22).

Works for me (GNU Emacs 24.0.50.1 (i486-pc-linux-gnu, GTK+ Version
2.12.12)), on Debian GNU/Linux Lenny. That's what describe-font says:

  name (opened by): -unknown-DejaVu Sans
  Mono-normal-normal-normal-*-9-*-*-*-m-0-iso10646-1
         full name: DejaVu Sans
  Mono:pixelsize=9:foundry=unknown:weight=normal:slant=normal:width=normal:spacing=100:scalable=true
              size:  9
            height: 12
   baseline-offset:  0
  relative-compose:  0

HTH
- -- tomás
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