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- #include <grass/gis.h>
- #include <grass/raster.h>
- #include <grass/rowio.h>
- typedef struct
- {
- int size; /* size of filter matrix */
- double **matrix; /* filter coefficient matrix */
- double **dmatrix; /* divisor coefficient matrix */
- double divisor; /* filter scale factor */
- int type; /* sequential or parallel */
- int start; /* starting corner */
- } FILTER;
- #define PARALLEL 1
- #define SEQUENTIAL 2
- #define UL 1
- #define UR 2
- #define LL 3
- #define LR 4
- /* apply.c */
- DCELL apply_filter(FILTER *, DCELL **);
- /* getfilt.c */
- FILTER *get_filter(char *, int *, char *);
- /* perform.c */
- int perform_filter(const char *, const char *, FILTER *, int, int);
- /* execute.c */
- int execute_filter(ROWIO *, int, FILTER *, DCELL *);
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