ref: f9b1e35a94df9cec69cdebab3dc975d138fb83bf
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*); Image *eallocimage(Display*, Rectangle, ulong, int, ulong); Image *memimage2image(Display*, Memimage*);