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#ifndef IMDI_H
#define IMDI_H
/* Integer Multi-Dimensional Interpolation */
/*
* Copyright 2000 - 2002 Graeme W. Gill
* All rights reserved.
*
* This material is licenced under the GNU GENERAL PUBLIC LICENCE :-
* see the Licence.txt file for licencing details.
*/
/*
* This software provides support for high speed integer
* multimensional interpolation.
*/
/*
* This file provides the common definitions for IMDI, and
* the data structures for communcating between the client
* imdi object.
*/
/* Pixel representation description */
/* This is a high level macro desciption of the pixel layout. */
/* It can be expanded by adding a new enumeration, and then */
/* implementing the code in imdi_gen to translate the enumeration */
/* into the exact pixlayout structure details. */
typedef enum {
invalid_rep = 0,
pixint8 = 1, /* 8 Bits per value, pixel interleaved, no padding */
planeint8 = 2, /* 8 bits per value, plane interleaved */
pixint16 = 3, /* 16 Bits per value, pixel interleaved, no padding */
planeint16 = 4 /* 16 bits per value, plane interleaved */
} imdi_pixrep;
/* IMDI Object */
struct _imdi {
void *impl; /* Pointer to implementation information */
/* Do the interpolation */
void (*interp)(struct _imdi *s, void **inp, void **outp, unsigned int npixels);
void (*done)(struct _imdi *s); /* Done with it */
}; typedef struct _imdi imdi;
/* Create a new imdi */
/* Return NULL if request is not supported */
imdi *new_imdi(
int id, /* Number of input dimensions */
int od, /* Number of output dimensions */
imdi_pixrep in, /* Input pixel representation */
int in_signed, /* Bit flag per channel, NZ if treat as signed */
imdi_pixrep out,/* Output pixel representation */
int out_signed, /* Bit flag per channel, NZ if treat as signed */
int res, /* Desired table resolution */
/* Callbacks to lookup the mdi table values */
double (*input_curve) (void *cntx, int ch, double in_val),
void (*md_table) (void *cntx, double *out_vals, double *in_vals),
double (*output_curve)(void *cntx, int ch, double in_val),
void *cntx /* Context to callbacks */
);
#endif /* IMDI_H */
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