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added tag ignore API for Bruce Cameron <cameron@petris.com>

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This commit is contained in:
Frank Warmerdam 1999-09-08 12:21:13 +00:00
parent 8deaff17c2
commit ba9f0c9cca
4 changed files with 75 additions and 8 deletions
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53
libtiff/tif_dir.c
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@ -1,4 +1,4 @@
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dir.c,v 1.1 1999-07-27 21:50:27 mike Exp $ */
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dir.c,v 1.2 1999-09-08 12:21:13 warmerda Exp $ */
/*
* Copyright (c) 1988-1997 Sam Leffler
@ -1129,3 +1129,54 @@ TIFFUnlinkDirectory(TIFF* tif, tdir_t dirn)
tif->tif_curstrip = (tstrip_t) -1;
return (1);
}
/* [BFC]
*
* Author: Bruce Cameron <cameron@petris.com>
*
* Set a table of tags that are to be replaced during directory process by the
* 'IGNORE' state - or return TRUE/FALSE for the requested tag such that
* 'ReadDirectory' can use the stored information.
*/
int
TIFFReassignTagToIgnore (enum TIFFIgnoreSense task, int TIFFtagID)
{
static int TIFFignoretags [FIELD_LAST];
static int tagcount = 0 ;
int i; /* Loop index */
int j; /* Loop index */
switch (task)
{
case TIS_STORE:
if ( tagcount < (FIELD_LAST - 1) )
{
for ( j = 0 ; j < tagcount ; ++j )
{ /* Do not add duplicate tag */
if ( TIFFignoretags [j] == TIFFtagID )
return (TRUE) ;
}
TIFFignoretags [tagcount++] = TIFFtagID ;
return (TRUE) ;
}
break ;
case TIS_EXTRACT:
for ( i = 0 ; i < tagcount ; ++i )
{
if ( TIFFignoretags [i] == TIFFtagID )
return (TRUE) ;
}
break;
case TIS_EMPTY:
tagcount = 0 ; /* Clear the list */
return (TRUE) ;
break;
default:
break;
}
return (FALSE);
}

8
libtiff/tif_dirread.c
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@ -1,4 +1,4 @@
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dirread.c,v 1.1 1999-07-27 21:50:27 mike Exp $ */
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dirread.c,v 1.2 1999-09-08 12:21:13 warmerda Exp $ */
/*
* Copyright (c) 1988-1997 Sam Leffler
@ -210,11 +210,17 @@ TIFFReadDirectory(TIFF* tif)
*/
fix = 0;
for (dp = dir, n = dircount; n > 0; n--, dp++) {
/*
* Find the field information entry for this tag.
* Added check for tags to ignore ... [BFC]
*/
if( TIFFReassignTagToIgnore(TIS_EXTRACT, dp->tdir_tag) )
dp->tdir_tag = IGNORE;
if (dp->tdir_tag == IGNORE)
continue;
/*
* Silicon Beach (at least) writes unordered
* directory tags (violating the spec). Handle

10
libtiff/tiff.h
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@ -1,4 +1,4 @@
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tiff.h,v 1.1 1999-07-27 21:50:27 mike Exp $ */
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tiff.h,v 1.2 1999-09-08 12:21:13 warmerda Exp $ */
/*
* Copyright (c) 1988-1997 Sam Leffler
@ -69,6 +69,14 @@ typedef unsigned long uint32; /* sizeof (uint32) must == 4 */
#endif
#endif /* _TIFF_DATA_TYPEDEFS_ */
/* For TIFFReassignTagToIgnore */
enum TIFFIgnoreSense /* IGNORE tag table */
{
TIS_STORE,
TIS_EXTRACT,
TIS_EMPTY
};
typedef struct {
uint16 tiff_magic; /* magic number (defines byte order) */
uint16 tiff_version; /* TIFF version number */

4
libtiff/tiffio.h
View File

@ -1,4 +1,4 @@
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tiffio.h,v 1.2 1999-08-16 17:43:03 warmerda Exp $ */
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tiffio.h,v 1.3 1999-09-08 12:21:13 warmerda Exp $ */
/*
* Copyright (c) 1988-1997 Sam Leffler
@ -258,6 +258,8 @@ extern int TIFFUnlinkDirectory(TIFF*, tdir_t);
extern int TIFFSetField(TIFF*, ttag_t, ...);
extern int TIFFVSetField(TIFF*, ttag_t, va_list);
extern int TIFFWriteDirectory(TIFF *);
extern int TIFFReassignTagToIgnore(enum TIFFIgnoreSense, int);
#if defined(c_plusplus) || defined(__cplusplus)
extern void TIFFPrintDirectory(TIFF*, FILE*, long = 0);
extern int TIFFReadScanline(TIFF*, tdata_t, uint32, tsample_t = 0);