-/* exif-tag.h
- *
+/*! \file exif-tag.h
+ * \brief Handling EXIF tags
+ */
+/*
* Copyright (c) 2001 Lutz Mueller <lutz@users.sourceforge.net>
*
* This library is free software; you can redistribute it and/or
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
*/
#ifndef __EXIF_TAG_H__
#include <libexif/exif-ifd.h>
#include <libexif/exif-data-type.h>
+/*! EXIF tags */
typedef enum {
EXIF_TAG_INTEROPERABILITY_INDEX = 0x0001,
EXIF_TAG_INTEROPERABILITY_VERSION = 0x0002,
EXIF_TAG_ARTIST = 0x013b,
EXIF_TAG_WHITE_POINT = 0x013e,
EXIF_TAG_PRIMARY_CHROMATICITIES = 0x013f,
- EXIF_TAG_TRANSFER_RANGE = 0x0156,
EXIF_TAG_SUB_IFDS = 0x014a,
+ EXIF_TAG_TRANSFER_RANGE = 0x0156,
EXIF_TAG_JPEG_PROC = 0x0200,
EXIF_TAG_JPEG_INTERCHANGE_FORMAT = 0x0201,
EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH = 0x0202,
EXIF_TAG_GPS_INFO_IFD_POINTER = 0x8825,
EXIF_TAG_ISO_SPEED_RATINGS = 0x8827,
EXIF_TAG_OECF = 0x8828,
+ EXIF_TAG_TIME_ZONE_OFFSET = 0x882a,
EXIF_TAG_EXIF_VERSION = 0x9000,
EXIF_TAG_DATE_TIME_ORIGINAL = 0x9003,
EXIF_TAG_DATE_TIME_DIGITIZED = 0x9004,
EXIF_TAG_SUBJECT_DISTANCE_RANGE = 0xa40c,
EXIF_TAG_IMAGE_UNIQUE_ID = 0xa420,
EXIF_TAG_GAMMA = 0xa500,
- EXIF_TAG_PRINT_IMAGE_MATCHING = 0xc4a5
+ EXIF_TAG_PRINT_IMAGE_MATCHING = 0xc4a5,
+ EXIF_TAG_PADDING = 0xea1c
} ExifTag;
/* GPS tags overlap with above ones. */
#define EXIF_TAG_GPS_AREA_INFORMATION 0x001c
#define EXIF_TAG_GPS_DATE_STAMP 0x001d
#define EXIF_TAG_GPS_DIFFERENTIAL 0x001e
+#define EXIF_TAG_GPS_H_POSITIONING_ERROR 0x001f
+/*! What level of support a tag enjoys in the EXIF standard */
typedef enum {
+ /*! The meaning of this tag is unknown */
EXIF_SUPPORT_LEVEL_UNKNOWN = 0,
+
+ /*! This tag is not allowed in the given IFD */
EXIF_SUPPORT_LEVEL_NOT_RECORDED,
+
+ /*! This tag is mandatory in the given IFD */
EXIF_SUPPORT_LEVEL_MANDATORY,
+
+ /*! This tag is optional in the given IFD */
EXIF_SUPPORT_LEVEL_OPTIONAL
} ExifSupportLevel;
-ExifTag exif_tag_from_name (const char *);
-const char *exif_tag_get_name_in_ifd (ExifTag, ExifIfd);
-const char *exif_tag_get_title_in_ifd (ExifTag, ExifIfd);
-const char *exif_tag_get_description_in_ifd (ExifTag, ExifIfd);
-ExifSupportLevel exif_tag_get_support_level_in_ifd (ExifTag, ExifIfd,
- ExifDataType);
+/*! Return the tag ID given its unique textual name.
+ *
+ * \param[in] name tag name
+ * \return tag ID, or 0 if tag not found
+ * \note The tag not found value cannot be distinguished from a legitimate
+ * tag number 0.
+ */
+ExifTag exif_tag_from_name (const char *name);
+
+/*! Return a textual name of the given tag when found in the given IFD. The
+ * name is a short, unique, non-localized text string containing only
+ * US-ASCII alphanumeric characters.
+ *
+ * \param[in] tag EXIF tag
+ * \param[in] ifd IFD
+ * \return textual name of the tag, or NULL if the tag is unknown
+ */
+const char *exif_tag_get_name_in_ifd (ExifTag tag, ExifIfd ifd);
+
+/*! Return a textual title of the given tag when found in the given IFD.
+ * The title is a short, localized description of the tag.
+ *
+ * \param[in] tag EXIF tag
+ * \param[in] ifd IFD
+ * \return textual title of the tag, or NULL if the tag is unknown
+ */
+const char *exif_tag_get_title_in_ifd (ExifTag tag, ExifIfd ifd);
+
+/*! Return a verbose textual description of the given tag when found in the
+ * given IFD. The description is a verbose, localized description of the tag.
+ *
+ * \param[in] tag EXIF tag
+ * \param[in] ifd IFD
+ * \return textual description of the tag, or NULL if the tag is unknown
+ */
+const char *exif_tag_get_description_in_ifd (ExifTag tag, ExifIfd ifd);
+
+/*! Return whether the given tag is mandatory or not in the given IFD and
+ * data type according to the EXIF specification. If the IFD given is
+ * EXIF_IFD_COUNT, the result is EXIF_SUPPORT_LEVEL_UNKNOWN. If the data
+ * type is EXIF_DATA_TYPE_UNKNOWN, the result is
+ * EXIF_SUPPORT_LEVEL_UNKNOWN unless the support level is the same for
+ * all data types.
+ *
+ * \param[in] tag EXIF tag
+ * \param[in] ifd IFD or EXIF_IFD_COUNT
+ * \param[in] t data type or EXIF_DATA_TYPE_UNKNOWN
+ * \return the level of support for this tag
+ */
+ExifSupportLevel exif_tag_get_support_level_in_ifd (ExifTag tag, ExifIfd ifd,
+ ExifDataType t);
/* Don't use these functions. They are here for compatibility only. */
+
+/*! \deprecated Use #exif_tag_get_name_in_ifd instead */
const char *exif_tag_get_name (ExifTag tag);
+
+/*! \deprecated Use #exif_tag_get_title_in_ifd instead */
const char *exif_tag_get_title (ExifTag tag);
+
+/*! \deprecated Use #exif_tag_get_description_in_ifd instead */
const char *exif_tag_get_description (ExifTag tag);
+
+/* For now, do not use these functions. */
+
+/*! \internal */
+ExifTag exif_tag_table_get_tag (unsigned int n);
+
+/*! \internal */
+const char *exif_tag_table_get_name (unsigned int n);
+
+/*! \internal */
+unsigned int exif_tag_table_count (void);
+
+
/* Don't use these definitions. They are here for compatibility only. */
+
+/*! \deprecated Use EXIF_TAG_PRINT_IMAGE_MATCHING instead. */
#define EXIF_TAG_UNKNOWN_C4A5 EXIF_TAG_PRINT_IMAGE_MATCHING
#ifdef __cplusplus
projects / platform / upstream / libexif.git / blobdiff