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/* RCSid $Id: normcodec.h,v 2.3 2019/08/14 21:00:14 greg Exp $ */ |
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/* |
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* Definitions and declarations for 32-bit vector normal encode/decode |
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* |
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* Include after rtio.h and fvect.h |
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* Includes resolu.h |
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*/ |
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|
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#ifndef _RAD_NORMALCODEC_H_ |
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#define _RAD_NORMALCODEC_H_ |
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|
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#include "resolu.h" |
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|
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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|
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#define NORMAL32FMT "32-bit_encoded_normal" |
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|
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#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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|
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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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short format; /* decoded format */ |
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short swapped; /* byte-swapped input */ |
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long dstart; /* start of data */ |
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long curpos; /* current input position */ |
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short 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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|
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/* Set codec defaults */ |
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extern void set_nc_defaults(NORMCODEC *ncp); |
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|
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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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|
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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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|
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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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|
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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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|
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extern char *progname; /* global argv[0] (set by main) */ |
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|
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _RAD_NORMALCODEC_H_ */ |
