ref: 3c3ba05ce6286c2a4bf691a7853412bf7e9647db
dir: /sys/src/cmd/image/fns.h/
void initworkrects(Rectangle*, int, Rectangle*); void *emalloc(ulong); void *erealloc(void*, ulong); Memimage *eallocmemimage(Rectangle, ulong); Memimage *ereadmemimage(int); int ewritememimage(int, Memimage*);