Re: [Plib-users] FNT text rendering on Matrox G200

[Steve B. <sjb...@ai...>]

Paolo Leoncini wrote:
> 
> Did anyone faced a dirty rendering (i.e. grey rects in place of text characters) of FNT library texture-mapped text strings on a Matrox G200 w driver 5.30 (the latest as far as I know)? I experienced it in running both the library example and FlightGear 0.7.1a.

There was a bug in the G200/G400 driver that caused this a long time back - I
thought it had been fixed - but I could easily be wrong.

IIRC, it showed up in the FNT example program as one half of the texture map
(displayed in the bottom-left corner of the display) being 'trashed'.

> It might be obviously due to a problem in how texture mapping is mapped onto card's features by the current driver, but in other applications yet in the same configuration texture mapping is generally correct (+ high quality, good performances).

FNT uses monochrome (INTENSITY_ALPHA) maps with colour blend mode on the
texture map.  Not many programs do that - so we could easily be hitting a
poorly tested path.

I suggest you ask on the Mesa mailing list.  I subscribe to that list
so I can chime in with answers to PLIB-ish questions if they come up.

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