ref: 26684157e0d0b5885f33e88c4d31805f48fa5d15
dir: /span.c/
#include "quakedef.h" void dospan(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, int cachewidth) { do{ *pdest++ = pbase[(s >> 16) + (t >> 16) * cachewidth]; s += sstep; t += tstep; }while(--spancount); }