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/* RCSid $Id: idmap.h,v 2.1 2019/07/26 16:18:06 greg Exp $ */ |
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/* |
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* Definitions and delcarations for loading identifier maps |
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* |
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* Include after stdio.h |
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* Includes resolu.h |
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*/ |
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|
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#ifndef _RAD_IDMAP_H_ |
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#define _RAD_IDMAP_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 IDMAP8FMT "8-bit_indexed_name" |
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#define IDMAP16FMT "16-bit_indexed_name" |
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#define IDMAP24FMT "24-bit_indexed_name" |
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#define IDMAPFMT "*-bit_indexed_name" |
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|
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#define HF_HEADOUT 0x2 /* copy header to stdout */ |
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#define HF_RESOUT 0x8 /* copy resolution */ |
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#define HF_STDERR 0x10 /* report errors to stderr */ |
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|
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/* Structure for reading identifier maps */ |
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typedef struct { |
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FILE *finp; /* input file pointer */ |
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long dstart; /* start of data */ |
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long curpos; /* current input position */ |
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RESOLU res; /* input resolution */ |
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int bytespi; /* 1, 2, or 3 bytes per index */ |
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int nids; /* ID count */ |
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int *idoffset; /* offsets to identifiers */ |
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char idtable[1]; /* nul-terminated ID strings */ |
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} IDMAP; |
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|
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/* Get indexed ID */ |
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#define mapID(mp,i) ( (i) >= (mp)->nids ? (char *)NULL : \ |
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(mp)->idtable+(mp)->idoffset[i] ) |
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|
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/* Open ID map file for reading, copying info to stdout based on hflags */ |
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extern IDMAP *idmap_ropen(const char *fname, int hflags); |
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|
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/* Read the next ID index from input */ |
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extern int idmap_next_i(IDMAP *idmp); |
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|
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/* Read the next ID from input */ |
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extern const char *idmap_next(IDMAP *idmp); |
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|
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/* Seek to a specific pixel position in ID map */ |
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extern int idmap_seek(IDMAP *idmp, int x, int y); |
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|
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/* Read ID at a pixel position */ |
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extern const char *idmap_pix(IDMAP *idmp, int x, int y); |
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|
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/* Close ID map and free resources */ |
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extern void idmap_close(IDMAP *idmp); |
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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_IDMAP_H_ */ |
