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#define HZ2MS(hz) (1000/(hz))
void resized(void);
/* nanosec */
uvlong nanosec(void);
/* alloc */
void *emalloc(ulong);
void *erealloc(void*, ulong);
Image *eallocimage(Display*, Rectangle, ulong, int, ulong);
Memimage *eallocmemimage(Rectangle, ulong);
/* fb */
Framebuf *mkfb(Rectangle);
Framebufctl *newfbctl(Rectangle);
/* shadeop */
double step(double, double);
double smoothstep(double, double, double);
/* util */
int min(int, int);
int max(int, int);
double fmin(double, double);
double fmax(double, double);
void swap(int*, int*);
void memsetd(double*, double, usize);
Memimage *readtga(char*);
Memimage *rgb(ulong);
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