draw1:	6M for draw 0,0,100,100 no repldraw3:	4M for draw 0,0,100,100 no repljust read src, dst - 250kmask reading - 650kwrite dst - 100kalpha calculation - 3000k olddraw:	10M for draw 0, 0, 1000, 1000 no repl all ldepth 3		44M for draw 0, 0, 1000, 1000 src, mask ldepth 2 dst ldepth 3draw4:	160M for draw 0, 0, 1000, 1000 no repl all r8g8b8	null loop: 10k	src, dst reading: 13-15M each	mask reading: 30M	alpha calculation loop: 90M		null alpha loop: 2M		minimal loop control +20M		alpha calculation with divides +190M		alpha calculation wtih shifts +70M	writeback: 11M