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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2005 Blender Foundation. All rights reserved. */
/** \file
* \ingroup imbuf
*/
#pragma once
#ifdef __cplusplus
extern "C" {
#endif
struct IDProperty;
struct ImBuf;
struct anim;
/**
* The metadata is a list of key/value pairs (both char *) that can me
* saved in the header of several image formats.
* Apart from some common keys like
* 'Software' and 'Description' (PNG standard) we'll use keys within the
* Blender namespace, so should be called 'Blender::StampInfo' or 'Blender::FrameNum'
* etc...
*
* The keys & values are stored in ID properties, in the group "metadata".
*/
/**
* Ensure that the metadata property is a valid #IDProperty object.
* This is a no-op when *metadata != NULL.
*/
void IMB_metadata_ensure(struct IDProperty **metadata);
void IMB_metadata_free(struct IDProperty *metadata);
/**
* Read the field from the image info into the field.
* \param metadata: the #IDProperty that contains the metadata
* \param key: the key of the field
* \param value: the data in the field, first one found with key is returned,
* memory has to be allocated by user.
* \param len: length of value buffer allocated by user.
* \return 1 (true) if metadata is present and value for the key found, 0 (false) otherwise.
*/
bool IMB_metadata_get_field(struct IDProperty *metadata, const char *key, char *value, size_t len);
/**
* Set user data in the metadata.
* If the field already exists its value is overwritten, otherwise the field
* will be added with the given value.
* \param metadata: the #IDProperty that contains the metadata
* \param key: the key of the field
* \param value: the data to be written to the field. zero terminated string
*/
void IMB_metadata_set_field(struct IDProperty *metadata, const char *key, const char *value);
void IMB_metadata_copy(struct ImBuf *dimb, struct ImBuf *simb);
struct IDProperty *IMB_anim_load_metadata(struct anim *anim);
/* Invoke callback for every value stored in the metadata. */
typedef void (*IMBMetadataForeachCb)(const char *field, const char *value, void *userdata);
void IMB_metadata_foreach(struct ImBuf *ibuf, IMBMetadataForeachCb callback, void *userdata);
#ifdef __cplusplus
}
#endif
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