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greg |
2.3 |
/* RCSid $Id: normcodec.h,v 2.2 2019/07/26 17:04:12 greg Exp $ */
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greg |
2.1 |
/*
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* Definitions and declarations for 32-bit vector normal encode/decode
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*
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* Include after stdio.h and fvect.h
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* Includes resolu.h
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*/
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#ifndef _RAD_NORMALCODEC_H_
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#define _RAD_NORMALCODEC_H_
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#include "resolu.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define NORMAL32FMT "32-bit_encoded_normal"
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greg |
2.2 |
#define HF_HEADIN 0x1 /* expect input header */
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#define HF_HEADOUT 0x2 /* write header to stdout */
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#define HF_RESIN 0x4 /* expect resolution string */
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#define HF_RESOUT 0x8 /* write resolution to stdout */
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#define HF_STDERR 0x10 /* report errors to stderr */
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#define HF_ALL 0x1f /* all flags above */
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#define HF_ENCODE 0x20 /* we are encoding */
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greg |
2.1 |
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/* Structure for encoding/decoding normals */
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typedef struct {
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FILE *finp; /* input stream */
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const char *inpname; /* input name */
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greg |
2.3 |
short format; /* decoded format */
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short swapped; /* byte-swapped input */
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greg |
2.1 |
long dstart; /* start of data */
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long curpos; /* current input position */
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int hdrflags; /* header i/o flags */
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char inpfmt[MAXFMTLEN]; /* format from header */
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RESOLU res; /* input resolution */
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} NORMCODEC;
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/* Set codec defaults */
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extern void set_nc_defaults(NORMCODEC *ncp);
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/* Load/copy header */
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extern int process_nc_header(NORMCODEC *ncp, int ac, char *av[]);
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/* Check that we have what we need to decode normals */
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extern int check_decode_normals(NORMCODEC *ncp);
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/* Decode next normal from input */
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extern int decode_normal_next(FVECT nrm, NORMCODEC *ncp);
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/* Seek to the indicated pixel position */
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extern int seek_nc_pix(NORMCODEC *ncp, int x, int y);
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/* Read and decode normal for the given pixel */
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extern int decode_normal_pix(FVECT nrm, NORMCODEC *ncp, int x, int y);
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extern char *progname; /* global argv[0] (set by main) */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RAD_NORMALCODEC_H_ */
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