Subject: /dev/fb, rcons, and changing resolutions
To: None <>
From: Matt Thomas <>
List: tech-kern
Date: 08/12/1999 07:26:19
The sparcbook supports multiple resolutions (640x480, 
800x600, 1024x768, 1152x900) and various bits-per-pixel 
value (8,15+8,16,24,32). It would be nice if there 
existed ioctls for /dev/fb to list the supported 
resolutions&depths and then an ioctl to select one.

This leads into a different problem: how does one 
inform rcons that the format of the framebuffer is 
different and it needs to select a new set of rasops 
that are appropriate for reconfigured display.

Speaking of rcons, it would be nice to be able to tell 
it what to use for fg pixel and bg pixel. Also if it 
could keep (at least) a screenful of the display in 
memory so that when /dev/fb is closed, the screen could 
be refreshed. (I assume wscons supports this for 
alternate VTs).

Matt Thomas               Internet:
3am Software Foundry      WWW URL:
Cupertino, CA             Disclaimer: I avow all knowledge of this message