MaskBlt implementation.
Dan Kegel
dank at kegel.com
Wed Apr 9 00:22:36 CDT 2003
> BYTE SwapROP3_SrcDst(BYTE bRop3)
> {
> /* swap 1,2 bit and 5,6 bit */
> BYTE bit1 = (bRop3 & 0x04) ? 0x02 : 0;
> BYTE bit2 = (bRop3 & 0x02) ? 0x04 : 0;
> BYTE bit5 = (bRop3 & 0x40) ? 0x20 : 0;
> BYTE bit6 = (bRop3 & 0x20) ? 0x40 : 0;
> return (bRop3 & 0x99) | bit1 | bit2 | bit5 | bit6;
> }
How 'bout
BYTE SwapROP3_SrcDst(BYTE bRop3)
{
/* swap 1,2 bit and 5,6 bit */
BYTE bits44 = (bRop3 & 0x44) >> 1;
BYTE bits22 = (bRop3 & 0x22) << 1;
return (bRop3 & 0x99) | bits22 | bits44;
}
--
Dan Kegel
http://www.kegel.com
http://counter.li.org/cgi-bin/runscript/display-person.cgi?user=78045
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