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