RGBA with 8 samples on IR

New Message Reply Date view Thread view Subject view Author view

Remi Arnaud (remi++at++remi.asd.sgi.com)
Wed, 9 Oct 1996 15:11:00 -0700

 Here is a message from Ziv Gigus <ziv++at++argus>

IR's hardware was designed to support either 10 bit RGB (no A) or 12
bit RGBA. It was never designed to support 10 bit RGBA and no future
flavour of IR ever will.

Due to bugs in imp8 it can not support 8 samples RGBA (12 bit). It
does support 8 sample RGB (10 bit) which are advertised in all pixels
depths.

Finally, note that both on IR and RE we dither glSampleAlpha(...) over
4 pixels, so with N samples you get 4N + 1 levels. This is done not
done for AlphaToMask, however.

Ziv

-- 




 o o  Remi ARNAUD - Silicon Graphics, Performer, Advanced Systems Dev      o o 
 o o  Mail Stop 590 - 2011 N. Shoreline Boulevard, Mountain View, CA94043  o o 
 o o  Email: remi++at++asd.sgi.com - Tel: (415) 933 6208 - Fax: (415) 965 2658  o o 


  


=======================================================================
List Archives, FAQ, FTP:  http://www.sgi.com/Technology/Performer/
            Submissions:  info-performer++at++sgi.com
        Admin. requests:  info-performer-request++at++sgi.com

New Message Reply Date view Thread view Subject view Author view

This archive was generated by hypermail 2.0b2 on Mon Aug 10 1998 - 17:53:45 PDT

This message has been cleansed for anti-spam protection. Replace '++at++' in any mail addresses with the '@' symbol.