Visualization Library 2.0.0-b5

A lightweight C++ OpenGL middleware for 2D/3D graphics

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tif_extension.c
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1 /* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_extension.c,v 1.4 2004/10/02 13:29:41 dron Exp $ */
2 
3 /*
4  * Copyright (c) 1988-1997 Sam Leffler
5  * Copyright (c) 1991-1997 Silicon Graphics, Inc.
6  *
7  * Permission to use, copy, modify, distribute, and sell this software and
8  * its documentation for any purpose is hereby granted without fee, provided
9  * that (i) the above copyright notices and this permission notice appear in
10  * all copies of the software and related documentation, and (ii) the names of
11  * Sam Leffler and Silicon Graphics may not be used in any advertising or
12  * publicity relating to the software without the specific, prior written
13  * permission of Sam Leffler and Silicon Graphics.
14  *
15  * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
16  * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
17  * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
18  *
19  * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
20  * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
21  * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
22  * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
23  * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24  * OF THIS SOFTWARE.
25  */
26 
27 /*
28  * TIFF Library.
29  *
30  * Various routines support external extension of the tag set, and other
31  * application extension capabilities.
32  */
33 
34 #include "tiffiop.h"
35 
37 
38 {
39  TIFFDirectory* td = &tif->tif_dir;
40 
41  return td->td_customValueCount;
42 }
43 
44 ttag_t TIFFGetTagListEntry( TIFF *tif, int tag_index )
45 
46 {
47  TIFFDirectory* td = &tif->tif_dir;
48 
49  if( tag_index < 0 || tag_index >= td->td_customValueCount )
50  return (ttag_t) -1;
51  else
52  return td->td_customValues[tag_index].info->field_tag;
53 }
54 
55 /*
56 ** This provides read/write access to the TIFFTagMethods within the TIFF
57 ** structure to application code without giving access to the private
58 ** TIFF structure.
59 */
61 
62 {
63  return &(tif->tif_tagmethods);
64 }
65 
66 void *TIFFGetClientInfo( TIFF *tif, const char *name )
67 
68 {
70 
71  while( link != NULL && strcmp(link->name,name) != 0 )
72  link = link->next;
73 
74  if( link != NULL )
75  return link->data;
76  else
77  return NULL;
78 }
79 
80 void TIFFSetClientInfo( TIFF *tif, void *data, const char *name )
81 
82 {
84 
85  /*
86  ** Do we have an existing link with this name? If so, just
87  ** set it.
88  */
89  while( link != NULL && strcmp(link->name,name) != 0 )
90  link = link->next;
91 
92  if( link != NULL )
93  {
94  link->data = data;
95  return;
96  }
97 
98  /*
99  ** Create a new link.
100  */
101 
103  assert (link != NULL);
104  link->next = tif->tif_clientinfo;
105  link->name = (char *) _TIFFmalloc(strlen(name)+1);
106  assert (link->name != NULL);
107  strcpy(link->name, name);
108  link->data = data;
109 
110  tif->tif_clientinfo = link;
111 }
uint32 ttag_t
Definition: tiffio.h:61
TIFFTagMethods tif_tagmethods
Definition: tiffiop.h:183
void * data
Definition: tiffiop.h:76
#define NULL
Definition: ftobjs.h:61
TIFFClientInfoLink * tif_clientinfo
Definition: tiffiop.h:184
TIFFTagValue * td_customValues
Definition: tif_dir.h:81
Definition: tiffiop.h:95
char * name
Definition: tiffiop.h:77
int td_customValueCount
Definition: tif_dir.h:80
const TIFFFieldInfo * info
Definition: tiffio.h:313
GLsizei GLsizei GLenum GLenum const GLvoid * data
TIFFTagMethods * TIFFAccessTagMethods(TIFF *tif)
Definition: tif_extension.c:60
void TIFFSetClientInfo(TIFF *tif, void *data, const char *name)
Definition: tif_extension.c:80
struct client_info * next
Definition: tiffiop.h:75
ttag_t TIFFGetTagListEntry(TIFF *tif, int tag_index)
Definition: tif_extension.c:44
GLuint const GLchar * name
int TIFFGetTagListCount(TIFF *tif)
Definition: tif_extension.c:36
TIFFDirectory tif_dir
Definition: tiffiop.h:122
ttag_t field_tag
Definition: tiffio.h:302
void * _TIFFmalloc(tsize_t s)
Definition: tif_acorn.c:461
void * TIFFGetClientInfo(TIFF *tif, const char *name)
Definition: tif_extension.c:66