4 * Copyright (C) 2008 The Geeqie Team
7 * Support for Exif file format, originally written by Eric Swalens.
8 * Modified by Quy Tonthat
9 * Reimplemented with generic data storage by John Ellis
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
32 *-----------------------------------------------------------------------------
34 *-----------------------------------------------------------------------------
37 #define EXIF_FORMAT_COUNT 13
40 EXIF_FORMAT_UNKNOWN = 0,
41 EXIF_FORMAT_BYTE_UNSIGNED = 1,
42 EXIF_FORMAT_STRING = 2,
43 EXIF_FORMAT_SHORT_UNSIGNED = 3,
44 EXIF_FORMAT_LONG_UNSIGNED = 4,
45 EXIF_FORMAT_RATIONAL_UNSIGNED = 5,
47 EXIF_FORMAT_UNDEFINED = 7,
48 EXIF_FORMAT_SHORT = 8,
50 EXIF_FORMAT_RATIONAL = 10,
51 EXIF_FORMAT_FLOAT = 11,
52 EXIF_FORMAT_DOUBLE = 12
57 *-----------------------------------------------------------------------------
59 *-----------------------------------------------------------------------------
62 typedef struct _ExifItem ExifItem;
64 typedef struct _ExifRational ExifRational;
72 /* enums useful for image manipulation */
75 EXIF_ORIENTATION_UNKNOWN = 0,
76 EXIF_ORIENTATION_TOP_LEFT = 1,
77 EXIF_ORIENTATION_TOP_RIGHT = 2,
78 EXIF_ORIENTATION_BOTTOM_RIGHT = 3,
79 EXIF_ORIENTATION_BOTTOM_LEFT = 4,
80 EXIF_ORIENTATION_LEFT_TOP = 5,
81 EXIF_ORIENTATION_RIGHT_TOP = 6,
82 EXIF_ORIENTATION_RIGHT_BOTTOM = 7,
83 EXIF_ORIENTATION_LEFT_BOTTOM = 8
84 } ExifOrientationType;
87 EXIF_UNIT_UNKNOWN = 0,
90 EXIF_UNIT_CENTIMETER = 3
94 typedef struct _ExifFormattedText ExifFormattedText;
95 struct _ExifFormattedText
98 const gchar *description;
99 gchar *(*build_func)(ExifData *exif);
103 *-----------------------------------------------------------------------------
105 *-----------------------------------------------------------------------------
108 ExifData *exif_read(gchar *path, gchar *sidecar_path);
110 ExifData *exif_read_fd(FileData *fd);
111 void exif_free_fd(FileData *fd, ExifData *exif);
113 /* exif_read returns processed data (merged from image and sidecar, etc.)
114 this function gives access to the original data from the image.
115 original data are part of the processed data and should not be freed separately */
116 ExifData *exif_get_original(ExifData *processed);
118 gint exif_write(ExifData *exif);
119 void exif_free(ExifData *exif);
121 gchar *exif_get_data_as_text(ExifData *exif, const gchar *key);
122 gint exif_get_integer(ExifData *exif, const gchar *key, gint *value);
123 ExifRational *exif_get_rational(ExifData *exif, const gchar *key, gint *sign);
125 ExifItem *exif_get_item(ExifData *exif, const gchar *key);
126 ExifItem *exif_add_item(ExifData *exif, const gchar *key);
127 ExifItem *exif_get_first_item(ExifData *exif);
128 ExifItem *exif_get_next_item(ExifData *exif);
131 gchar *exif_item_get_tag_name(ExifItem *item);
132 guint exif_item_get_tag_id(ExifItem *item);
133 guint exif_item_get_elements(ExifItem *item);
134 gchar *exif_item_get_data(ExifItem *item, guint *data_len);
135 gchar *exif_item_get_description(ExifItem *item);
136 guint exif_item_get_format_id(ExifItem *item);
137 const gchar *exif_item_get_format_name(ExifItem *item, gint brief);
138 gchar *exif_item_get_data_as_text(ExifItem *item);
139 gint exif_item_get_integer(ExifItem *item, gint *value);
140 ExifRational *exif_item_get_rational(ExifItem *item, gint *sign, guint n);
142 gchar *exif_item_get_string(ExifItem *item, gint idx);
144 gchar *exif_get_description_by_key(const gchar *key);
145 gchar *exif_get_tag_description_by_key(const gchar *key);
147 gchar *exif_get_formatted_by_key(ExifData *exif, const gchar *key, gint *key_valid);
149 gint exif_item_delete(ExifData *exif, ExifItem *item);
150 gint exif_item_set_string(ExifItem *item, const gchar *str);
152 guchar *exif_get_color_profile(ExifData *exif, guint *data_len);
154 /* jpeg embedded icc support */
156 void exif_add_jpeg_color_profile(ExifData *exif, guchar *cp_data, guint cp_length);
159 gint exif_jpeg_segment_find(guchar *data, guint size,
160 guchar app_marker, const gchar *magic, guint magic_len,
161 guint *seg_offset, guint *seg_length);
162 gint exif_jpeg_parse_color(ExifData *exif, guchar *data, guint size);
165 guchar *exif_get_preview(ExifData *exif, guint *data_len, gint requested_width, gint requested_height);
166 void exif_free_preview(guchar *buf);
170 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */