Well, finally i found a couple of minutes and extracted
my surface stretching routine (without image smoothing).
ftp://ftp.bms-austria.com/pub/linux/SDL/stretchdemo-0.1.tar.gz----------------------------------------
Alexander Pipelka
R&D
pipelka at bms-austria.com
BMS Austria
Stuckgasse 7/1
A-1070 VIENNA
www.bms-austria.com