1 // Copyright 2012 Google Inc. All Rights Reserved.
2 //
3 // Use of this source code is governed by a BSD-style license
4 // that can be found in the COPYING file in the root of the source
5 // tree. An additional intellectual property rights grant can be found
6 // in the file PATENTS. All contributing project authors may
7 // be found in the AUTHORS file in the root of the source tree.
8 // -----------------------------------------------------------------------------
9 //
10 //  Metadata types and functions.
11 //
12 
13 #ifndef WEBP_IMAGEIO_METADATA_H_
14 #define WEBP_IMAGEIO_METADATA_H_
15 
16 #include "webp/types.h"
17 
18 #ifdef __cplusplus
19 extern "C" {
20 #endif
21 
22 typedef struct MetadataPayload {
23   uint8_t* bytes;
24   size_t size;
25 } MetadataPayload;
26 
27 typedef struct Metadata {
28   MetadataPayload exif;
29   MetadataPayload iccp;
30   MetadataPayload xmp;
31 } Metadata;
32 
33 #define METADATA_OFFSET(x) offsetof(Metadata, x)
34 
35 void MetadataInit(Metadata* const metadata);
36 void MetadataPayloadDelete(MetadataPayload* const payload);
37 void MetadataFree(Metadata* const metadata);
38 
39 // Stores 'metadata' to 'payload->bytes', returns false on allocation error.
40 int MetadataCopy(const char* metadata, size_t metadata_len,
41                  MetadataPayload* const payload);
42 
43 #ifdef __cplusplus
44 }    // extern "C"
45 #endif
46 
47 #endif  // WEBP_IMAGEIO_METADATA_H_
48