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#ifndef IZOOMDEF
#define IZOOMDEF
/**
** header for izoom-
** Magnify or minify a picture with or without filtering. The
** filtered method is one pass, uses 2-d convolution, and is optimized
** by integer arithmetic and precomputation of filter coeffs.
**
** Paul Haeberli - 1988
**/
#define IMPULSE 1
#define BOX 2
#define TRIANGLE 3
#define QUADRATIC 4
#define MITCHELL 5
#define GAUSSIAN 6
typedef struct FILTER {
int n, totw, halftotw;
short *dat;
short *w;
} FILTER;
typedef void (*getfunc_t) (short *, int);
typedef struct zoom {
getfunc_t getfunc;
short *abuf;
short *bbuf;
int anx, any;
int bnx, bny;
short **xmap;
int type;
int curay;
int y;
FILTER *xfilt, *yfilt; /* stuff for fitered zoom */
short *tbuf;
int nrows, clamp, ay;
short **filtrows;
int *accrow;
} zoom;
zoom *newzoom(getfunc_t getfunc, int anx, int any, int bnx, int bny, int filttype, float blur);
float filterinteg(float bmin, float bmax, float blurf);
void filterzoom(getfunc_t getfunc, getfunc_t putfunc, int anx, int any, int bnx, int bny, int filttype, float blur);
#endif
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