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#ifndef XCAL_H
#define XCAL_H
/*
* Argyll Color Correction System
* Calibration curve class.
*
* Author: Graeme W. Gill
* Date: 30/10/2005
*
* Copyright 2005 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 class allows reading and using a calibration file.
* Creation is currently left up to specialized programs (dispcal, printcal).
* This is also used by xicc to automatically take calibration into account
* when computing ink limits.
*/
struct _xcal {
/* Public: */
void (*del)(struct _xcal *p);
/* Read a calibration file from a CGATS table */
/* Return nz if this fails (filename is for error messages) */
int (*read_cgats) (struct _xcal *p, cgats *cg, int table, char *filename);
/* Read a calibration file from an ICC vcgt tag */
/* Return nz if this fails */
int (*read_icc) (struct _xcal *p, icc *c);
/* Read a calibration file */
/* Return nz if this fails */
int (*read) (struct _xcal *p, char *filename);
/* Write a calibration to a new cgats table */
/* Return nz if this fails */
int (*write_cgats)(struct _xcal *p, cgats *tcg);
/* Write a calibration file */
/* Return nz if this fails */
int (*write)(struct _xcal *p, char *filename);
/* Translate values through the curves. */
void (*interp) (struct _xcal *p, double *out, double *in);
/* Translate a value backwards through the curves. */
/* Return nz if the inversion fails */
int (*inv_interp) (struct _xcal *p, double *out, double *in);
/* Translate a value through one of the curves */
double (*interp_ch) (struct _xcal *p, int ch, double in);
/* Translate a value backwards through one of the curves */
/* Return -1.0 if the inversion fails */
double (*inv_interp_ch) (struct _xcal *p, int ch, double in);
int noramdac; /* Set to nz if there was no VideoLUT access */
int tvenc; /* nz if this cal was created using (16-235)/255 Video encoding */
/* Private: */
icProfileClassSignature devclass; /* Type of device */
inkmask devmask; /* ICX ink mask of device space */
icColorSpaceSignature colspace; /* Corresponding ICC device space sig (0 if none) */
int devchan; /* Number of chanels in device space */
profxinf xpi; /* Extra calibration description information */
char err[CGATS_ERRM_LENGTH]; /* Error message */
int errc; /* Error code */
rspl *cals[MAX_CHAN];
}; typedef struct _xcal xcal;
/* Create a new, uninitialised xcal */
xcal *new_xcal(void);
#endif /* XCAL */
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