1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
// =================================================================================================
// ADOBE SYSTEMS INCORPORATED
// Copyright 2006-2007 Adobe Systems Incorporated
// All Rights Reserved
//
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance with the terms
// of the Adobe license agreement accompanying it.
// =================================================================================================
#include "XMP_Environment.h" // ! This must be the first include.
#include "ReconcileLegacy.hpp"
#include "Reconcile_Impl.hpp"
// =================================================================================================
/// \file ReconcileLegacy.cpp
/// \brief Top level parts of utilities to reconcile between XMP and legacy metadata forms such as
/// TIFF/Exif and IPTC.
///
// =================================================================================================
// =================================================================================================
// ImportJTPtoXMP
// ==============
//
// Import legacy metadata for JPEG, TIFF, and Photoshop files into the XMP. The caller must have
// already done the file specific processing to select the appropriate sources of the TIFF stream,
// the Photoshop image resources, and the IPTC.
// ! Note that kLegacyJTP_None does not literally mean no legacy. It means no IPTC-like legacy, i.e.
// ! stuff that Photoshop pre-7 would reconcile into the IPTC and thus affect the import order below.
void ImportJTPtoXMP ( XMP_FileFormat srcFormat,
RecJTP_LegacyPriority lastLegacy,
TIFF_Manager * tiff, // ! Need for UserComment and RelatedSoundFile hack.
const PSIR_Manager & psir,
IPTC_Manager * iptc, // ! Need to call UpdateDataSets.
SXMPMeta * xmp,
XMP_OptionBits options /* = 0 */ )
{
bool haveXMP = XMP_OptionIsSet ( options, k2XMP_FileHadXMP );
bool haveIPTC = XMP_OptionIsSet ( options, k2XMP_FileHadIPTC );
bool haveExif = XMP_OptionIsSet ( options, k2XMP_FileHadExif );
int iptcDigestState = kDigestMatches; // Default is to do no imports.
int tiffDigestState = kDigestMatches;
int exifDigestState = kDigestMatches;
if ( ! haveXMP ) {
// If there is no XMP then what we have differs.
if ( haveIPTC) iptcDigestState = kDigestDiffers;
if ( haveExif ) tiffDigestState = exifDigestState = kDigestDiffers;
} else {
// If there is XMP then check the digests for what we have. No legacy at all means the XMP
// is OK, and the CheckXyzDigest routines return true when there is no digest. This matches
// Photoshop, and avoids importing when an app adds XMP but does not export to the legacy or
// write a digest.
if ( haveIPTC ) iptcDigestState = ReconcileUtils::CheckIPTCDigest ( iptc, psir );
if ( iptcDigestState == kDigestMissing ) {
// *** Temporary hack to approximate Photoshop's behavior. Need fully documented policies!
tiffDigestState = exifDigestState = kDigestMissing;
} else if ( haveExif ) {
tiffDigestState = ReconcileUtils::CheckTIFFDigest ( *tiff, *xmp );
exifDigestState = ReconcileUtils::CheckExifDigest ( *tiff, *xmp ); // ! Yes, the Exif is in the TIFF stream.
}
}
if ( lastLegacy > kLegacyJTP_TIFF_IPTC ) {
XMP_Throw ( "Invalid JTP legacy priority", kXMPErr_InternalFailure );
}
// A TIFF file with tags 270, 315, or 33432 is currently the only case where the IPTC is less
// important than the TIFF/Exif. If there is no IPTC or no TIFF/Exif then the order does not
// matter. The order only affects collisions between those 3 TIFF tags and their IPTC counterparts.
if ( lastLegacy == kLegacyJTP_TIFF_TIFF_Tags ) {
if ( iptcDigestState != kDigestMatches ) {
ReconcileUtils::ImportIPTC ( *iptc, xmp, iptcDigestState );
ReconcileUtils::ImportPSIR ( psir, xmp, iptcDigestState );
}
if ( tiffDigestState != kDigestMatches ) ReconcileUtils::ImportTIFF ( *tiff, xmp, tiffDigestState, srcFormat );
if ( exifDigestState != kDigestMatches ) ReconcileUtils::ImportExif ( *tiff, xmp, exifDigestState );
} else {
if ( tiffDigestState != kDigestMatches ) ReconcileUtils::ImportTIFF ( *tiff, xmp, tiffDigestState, srcFormat );
if ( exifDigestState != kDigestMatches ) ReconcileUtils::ImportExif ( *tiff, xmp, exifDigestState );
if ( iptcDigestState != kDigestMatches ) {
ReconcileUtils::ImportIPTC ( *iptc, xmp, iptcDigestState );
ReconcileUtils::ImportPSIR ( psir, xmp, iptcDigestState );
}
}
// ! Older versions of Photoshop did not import the UserComment or RelatedSoundFile tags. Note
// ! whether the initial XMP has these tags. Don't delete them from the TIFF when saving unless
// ! they were in the XMP to begin with. Can't do this in ReconcileUtils::ImportExif, that is
// ! only called when the Exif is newer than the XMP.
tiff->xmpHadUserComment = xmp->DoesPropertyExist ( kXMP_NS_EXIF, "UserComment" );
tiff->xmpHadRelatedSoundFile = xmp->DoesPropertyExist ( kXMP_NS_EXIF, "RelatedSoundFile" );
} // ImportJTPtoXMP
// =================================================================================================
// ExportXMPtoJTP
// ==============
void ExportXMPtoJTP ( XMP_FileFormat destFormat,
SXMPMeta * xmp,
TIFF_Manager * tiff,
PSIR_Manager * psir,
IPTC_Manager * iptc,
XMP_OptionBits options /* = 0 */ )
{
XMP_Assert ( xmp != 0 );
XMP_Assert ( (destFormat == kXMP_JPEGFile) || (destFormat == kXMP_TIFFFile) || (destFormat == kXMP_PhotoshopFile) );
#if XMP_UNIXBuild
// ! Hack until the legacy-as-local issues are resolved for generic UNIX.
iptc = 0; // Strip IIM from the file.
if ( tiff != 0 ) tiff->DeleteTag ( kTIFF_PrimaryIFD, kTIFF_IPTC );
if ( psir != 0 ) {
psir->DeleteImgRsrc ( kPSIR_IPTC );
psir->DeleteImgRsrc ( kPSIR_IPTCDigest );
}
#endif
// Save the IPTC changed flag specially. SetIPTCDigest will call UpdateMemoryDataSets, which
// will clear the IsChanged flag. Also, UpdateMemoryDataSets can be called twice, once for the
// general IPTC-in-PSIR case and once for the IPTC-as-TIFF-tag case.
bool iptcChanged = false;
// Do not write legacy IPTC (IIM) or PSIR in DNG files (which are a variant of TIFF).
if ( (destFormat == kXMP_TIFFFile) && (tiff != 0) &&
tiff->GetTag ( kTIFF_PrimaryIFD, kTIFF_DNGVersion, 0 ) ) {
iptc = 0; // These prevent calls to ExportIPTC and ExportPSIR.
psir = 0;
tiff->DeleteTag ( kTIFF_PrimaryIFD, kTIFF_IPTC ); // These remove any existing IPTC and PSIR.
tiff->DeleteTag ( kTIFF_PrimaryIFD, kTIFF_PSIR );
}
// Export the individual metadata items to the legacy forms. The PSIR and IPTC must be done
// before the TIFF and Exif. The PSIR and IPTC have side effects that can modify the XMP, and
// thus the values written to TIFF and Exif. The side effects are the CR<->LF normalization that
// is done to match Photoshop.
if ( psir != 0) ReconcileUtils::ExportPSIR ( *xmp, psir );
if ( iptc != 0 ) {
ReconcileUtils::ExportIPTC ( xmp, iptc );
iptcChanged = iptc->IsChanged(); // ! Do after calling ExportIPTC and before calling SetIPTCDigest.
if ( psir != 0 ) ReconcileUtils::SetIPTCDigest ( iptc, psir ); // ! Do always, in case the digest was missing before.
}
if ( tiff != 0 ) {
ReconcileUtils::ExportTIFF ( *xmp, tiff );
ReconcileUtils::ExportExif ( *xmp, tiff );
ReconcileUtils::SetTIFFDigest ( *tiff, xmp ); // ! Do always, in case the digest was missing before.
ReconcileUtils::SetExifDigest ( *tiff, xmp ); // ! Do always, in case the digest was missing before.
}
// Now update the collections of metadata, e.g. the IPTC in PSIR 1028 or XMP in TIFF tag 700.
// - All of the formats have the IPTC in the PSIR portion.
// - JPEG has nothing else special.
// - PSD has the XMP and Exif in the PSIR portion.
// - TIFF has the XMP, IPTC, and PSIR in primary IFD tags. Yes, a 2nd copy of the IPTC.
if ( (iptc != 0) && (psir != 0) && iptcChanged ) {
void* iptcPtr;
XMP_Uns32 iptcLen = iptc->UpdateMemoryDataSets ( &iptcPtr );
psir->SetImgRsrc ( kPSIR_IPTC, iptcPtr, iptcLen );
}
if ( destFormat == kXMP_PhotoshopFile ) {
XMP_Assert ( psir != 0 );
if ( (tiff != 0) && tiff->IsChanged() ) {
void* exifPtr;
XMP_Uns32 exifLen = tiff->UpdateMemoryStream ( &exifPtr );
psir->SetImgRsrc ( kPSIR_Exif, exifPtr, exifLen );
}
} else if ( destFormat == kXMP_TIFFFile ) {
XMP_Assert ( tiff != 0 );
if ( (iptc != 0) && iptcChanged ) {
void* iptcPtr;
XMP_Uns32 iptcLen = iptc->UpdateMemoryDataSets ( &iptcPtr );
tiff->SetTag ( kTIFF_PrimaryIFD, kTIFF_IPTC, kTIFF_UndefinedType, iptcLen, iptcPtr );
}
if ( (psir != 0) && psir->IsChanged() ) {
void* psirPtr;
XMP_Uns32 psirLen = psir->UpdateMemoryResources ( &psirPtr );
tiff->SetTag ( kTIFF_PrimaryIFD, kTIFF_PSIR, kTIFF_UndefinedType, psirLen, psirPtr );
}
}
} // ExportXMPtoJTP
|
