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#ifndef IMDI_H
#define IMDI_H
/* Integer Multi-Dimensional Interpolation */
/*
* Copyright 2000 - 2007 Graeme W. Gill
* All rights reserved.
*
* This material is licenced under the GNU AFFERO GENERAL PUBLIC LICENSE Version 3 :-
* see the License.txt file for licencing details.
*/
/*
* This file provides the common definitions for IMDI, and
* in particular, the runtime conversion object.
* Actual runtime details are kept opaque.
*/
#include "imdi_utl.h"
#include "imdi_arch.h"
#include "imdi_gen.h"
/* IMDI Object */
struct _imdi {
void *impl; /* Opaque pointer to implementation information (type imdi_imp *) */
/* Do the interpolation. */
/* Each pointer corresponds to the colors plane for plane interleaved. */
/* pointer[0] is used for pixel interleave. */
/* Stride is only obeyed if the appropriate option flag was set */
/* in new_imdi, and is in pixel components, and effectively defaults */
/* to 1 for plane interleaved, and id and od (adjusted for skip) for pixel interleave, */
/* so stride is in color components (NOT bytes) */
/* Output pointers and data must only reference non-skipped output channels. */
/* Note that once an imdi is created, multiple can call interp() without */
/* interfering with each other, allowing parallel execution. */
void (*interp)(struct _imdi *s, void **outp, int outst, /* Ouput pointers and stride */
void **inp, int inst, /* Input pointers and stride */
unsigned int npixels); /* Number of pixels */
/* Return some information about the imdi */
void (*info)(struct _imdi *s, unsigned long *size, int *gres, int *sres);
/* Get the per output channel check flags (bit is indexed by callback channel) */
/* Flag gets set if output != checkv */
unsigned int (*get_check)(struct _imdi *s);
/* Reset the output check flags (flag is not reset by interp) */
void (*reset_check)(struct _imdi *s);
/* Delete this object */
void (*del)(struct _imdi *s);
}; 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 lookup dimensions */
/* Number of output channels written = od - no. of oopt skip flags */
imdi_pixrep in, /* Input pixel representation */
int in_signed, /* Bit flag per channel, NZ if treat as signed */
int *inm, /* Input raster channel to callback channel mapping, NULL for none. */
imdi_iprec iprec, /* Internal processing precision */
imdi_pixrep out, /* Output pixel representation */
int out_signed, /* Bit flag per channel, NZ if treat as signed */
int *outm, /* Output raster channel to callback channel mapping, NULL for none. */
/* Mapping must include skipped channels. */
int res, /* Desired table resolution */
imdi_ooptions oopt, /* Output per channel options (by callback channel) */
unsigned int *checkv, /* Output channel check values (by callback channel, NULL == 0) */
imdi_options opt, /* Direction and stride options */
/* Callbacks to lookup the imdi table values. */
/* (Skip output channels are looked up) */
void (*input_curves) (void *cntx, double *out_vals, double *in_vals),
void (*md_table) (void *cntx, double *out_vals, double *in_vals),
void (*output_curves)(void *cntx, double *out_vals, double *in_vals),
void *cntx /* Context to callbacks */
);
#endif /* IMDI_H */
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