/* LIBGIMPBASE - The GIMP Basic Library * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball * * gimpmetadata.c * Copyright (C) 2013 Hartmut Kuhse * Michael Natterer * * This library is free software: you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 3 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library. If not, see * . */ #include "config.h" #include #include #include #include #include "libgimpmath/gimpmath.h" #include "gimpbasetypes.h" #include "gimplimits.h" #include "gimpmetadata.h" #include "gimpunit.h" #include "libgimp/libgimp-intl.h" /** * SECTION: gimpmetadata * @title: gimpmetadata * @short_description: Basic functions for handling #GimpMetadata objects. * @see_also: gimp_image_metadata_load_prepare(), * gimp_image_metadata_load_finish(), * gimp_image_metadata_load_prepare(), * gimp_image_metadata_load_finish(). * * Basic functions for handling #GimpMetadata objects. **/ static GQuark gimp_metadata_error_quark (void); static void gimp_metadata_add (GimpMetadata *src, GimpMetadata *dest); static const gchar *tiff_tags[] = { "Xmp.tiff", "Exif.Image.ImageWidth", "Exif.Image.ImageLength", "Exif.Image.BitsPerSample", "Exif.Image.Compression", "Exif.Image.PhotometricInterpretation", "Exif.Image.FillOrder", "Exif.Image.SamplesPerPixel", "Exif.Image.StripOffsets", "Exif.Image.RowsPerStrip", "Exif.Image.StripByteCounts", "Exif.Image.PlanarConfiguration" }; static const gchar *jpeg_tags[] = { "Exif.Image.JPEGProc", "Exif.Image.JPEGInterchangeFormat", "Exif.Image.JPEGInterchangeFormatLength", "Exif.Image.JPEGRestartInterval", "Exif.Image.JPEGLosslessPredictors", "Exif.Image.JPEGPointTransforms", "Exif.Image.JPEGQTables", "Exif.Image.JPEGDCTables", "Exif.Image.JPEGACTables" }; static const gchar *unsupported_tags[] = { "Exif.Image.SubIFDs", "Exif.Image.ClipPath", "Exif.Image.XClipPathUnits", "Exif.Image.YClipPathUnits", "Xmp.xmpMM.History", "Exif.Image.XPTitle", "Exif.Image.XPComment", "Exif.Image.XPAuthor", "Exif.Image.XPKeywords", "Exif.Image.XPSubject", "Exif.Image.DNGVersion", "Exif.Image.DNGBackwardVersion", "Exif.Iop" }; static const guint8 minimal_exif[] = { 0xff, 0xd8, 0xff, 0xe0, 0x00, 0x10, 0x4a, 0x46, 0x49, 0x46, 0x00, 0x01, 0x01, 0x01, 0x00, 0x5a, 0x00, 0x5a, 0x00, 0x00, 0xff, 0xe1 }; static const guint8 wilber_jpg[] = { 0xff, 0xd8, 0xff, 0xe0, 0x00, 0x10, 0x4a, 0x46, 0x49, 0x46, 0x00, 0x01, 0x01, 0x01, 0x00, 0x5a, 0x00, 0x5a, 0x00, 0x00, 0xff, 0xdb, 0x00, 0x43, 0x00, 0x50, 0x37, 0x3c, 0x46, 0x3c, 0x32, 0x50, 0x46, 0x41, 0x46, 0x5a, 0x55, 0x50, 0x5f, 0x78, 0xc8, 0x82, 0x78, 0x6e, 0x6e, 0x78, 0xf5, 0xaf, 0xb9, 0x91, 0xc8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xdb, 0x00, 0x43, 0x01, 0x55, 0x5a, 0x5a, 0x78, 0x69, 0x78, 0xeb, 0x82, 0x82, 0xeb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x11, 0x08, 0x00, 0x10, 0x00, 0x10, 0x03, 0x01, 0x22, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11, 0x01, 0xff, 0xc4, 0x00, 0x16, 0x00, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x01, 0x02, 0xff, 0xc4, 0x00, 0x1e, 0x10, 0x00, 0x01, 0x05, 0x00, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02, 0x03, 0x11, 0x31, 0x04, 0x12, 0x51, 0x61, 0x71, 0xff, 0xc4, 0x00, 0x14, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xc4, 0x00, 0x14, 0x11, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xda, 0x00, 0x0c, 0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11, 0x00, 0x3f, 0x00, 0x18, 0xa0, 0x0e, 0x6d, 0xbc, 0xf5, 0xca, 0xf7, 0x78, 0xb6, 0xfe, 0x3b, 0x23, 0xb2, 0x1d, 0x64, 0x68, 0xf0, 0x8a, 0x39, 0x4b, 0x74, 0x9c, 0xa5, 0x5f, 0x35, 0x8a, 0xb2, 0x7e, 0xa0, 0xff, 0xd9, 0x00 }; static const guint wilber_jpg_len = G_N_ELEMENTS (wilber_jpg); /** * gimp_metadata_new: * * Creates a new #GimpMetadata instance. * * Return value: The new #GimpMetadata. * * Since: 2.10 */ GimpMetadata * gimp_metadata_new (void) { GExiv2Metadata *metadata = NULL; if (gexiv2_initialize ()) { metadata = gexiv2_metadata_new (); if (! gexiv2_metadata_open_buf (metadata, wilber_jpg, wilber_jpg_len, NULL)) { g_object_unref (metadata); return NULL; } } return metadata; } /** * gimp_metadata_duplicate: * @metadata: The object to duplicate, or %NULL. * * Duplicates a #GimpMetadata instance. * * Return value: The new #GimpMetadata, or %NULL if @metadata is %NULL. * * Since: 2.10 */ GimpMetadata * gimp_metadata_duplicate (GimpMetadata *metadata) { GimpMetadata *new_metadata = NULL; g_return_val_if_fail (metadata == NULL || GEXIV2_IS_METADATA (metadata), NULL); if (metadata) { gchar *xml; xml = gimp_metadata_serialize (metadata); new_metadata = gimp_metadata_deserialize (xml); g_free (xml); } return new_metadata; } typedef struct { gchar name[1024]; gboolean base64; GimpMetadata *metadata; } GimpMetadataParseData; static const gchar* gimp_metadata_attribute_name_to_value (const gchar **attribute_names, const gchar **attribute_values, const gchar *name) { while (*attribute_names) { if (! strcmp (*attribute_names, name)) { return *attribute_values; } attribute_names++; attribute_values++; } return NULL; } static void gimp_metadata_deserialize_start_element (GMarkupParseContext *context, const gchar *element_name, const gchar **attribute_names, const gchar **attribute_values, gpointer user_data, GError **error) { GimpMetadataParseData *parse_data = user_data; if (! strcmp (element_name, "tag")) { const gchar *name; const gchar *encoding; name = gimp_metadata_attribute_name_to_value (attribute_names, attribute_values, "name"); encoding = gimp_metadata_attribute_name_to_value (attribute_names, attribute_values, "encoding"); if (! name) { g_set_error (error, gimp_metadata_error_quark (), 1001, "Element 'tag' does not contain required attribute 'name'."); return; } strncpy (parse_data->name, name, sizeof (parse_data->name)); parse_data->name[sizeof (parse_data->name) - 1] = 0; parse_data->base64 = (encoding && ! strcmp (encoding, "base64")); } } static void gimp_metadata_deserialize_end_element (GMarkupParseContext *context, const gchar *element_name, gpointer user_data, GError **error) { } static void gimp_metadata_deserialize_text (GMarkupParseContext *context, const gchar *text, gsize text_len, gpointer user_data, GError **error) { GimpMetadataParseData *parse_data = user_data; const gchar *current_element; current_element = g_markup_parse_context_get_element (context); if (! g_strcmp0 (current_element, "tag")) { gchar *value = g_strndup (text, text_len); if (parse_data->base64) { guchar *decoded; gsize len; decoded = g_base64_decode (value, &len); if (decoded[len - 1] == '\0') gexiv2_metadata_set_tag_string (parse_data->metadata, parse_data->name, (const gchar *) decoded); g_free (decoded); } else { gexiv2_metadata_set_tag_string (parse_data->metadata, parse_data->name, value); } g_free (value); } } static void gimp_metadata_deserialize_error (GMarkupParseContext *context, GError *error, gpointer user_data) { g_printerr ("Metadata parse error: %s\n", error->message); } /** * gimp_metadata_deserialize: * @metadata_xml: A string of serialized metadata XML. * * Deserializes a string of XML that has been created by * gimp_metadata_serialize(). * * Return value: The new #GimpMetadata. * * Since: 2.10 */ GimpMetadata * gimp_metadata_deserialize (const gchar *metadata_xml) { GimpMetadata *metadata; GMarkupParser markup_parser; GimpMetadataParseData parse_data; GMarkupParseContext *context; g_return_val_if_fail (metadata_xml != NULL, NULL); metadata = gimp_metadata_new (); parse_data.metadata = metadata; markup_parser.start_element = gimp_metadata_deserialize_start_element; markup_parser.end_element = gimp_metadata_deserialize_end_element; markup_parser.text = gimp_metadata_deserialize_text; markup_parser.passthrough = NULL; markup_parser.error = gimp_metadata_deserialize_error; context = g_markup_parse_context_new (&markup_parser, 0, &parse_data, NULL); g_markup_parse_context_parse (context, metadata_xml, strlen (metadata_xml), NULL); g_markup_parse_context_unref (context); return metadata; } static gchar * gimp_metadata_escape (const gchar *name, const gchar *value, gboolean *base64) { if (! g_utf8_validate (value, -1, NULL)) { gchar *encoded; encoded = g_base64_encode ((const guchar *) value, strlen (value) + 1); g_printerr ("Invalid UTF-8 in metadata value %s, encoding as base64: %s\n", name, encoded); *base64 = TRUE; return encoded; } *base64 = FALSE; return g_markup_escape_text (value, -1); } static void gimp_metadata_append_tag (GString *string, const gchar *name, gchar *value, gboolean base64) { if (value) { if (base64) { g_string_append_printf (string, " %s\n", name, value); } else { g_string_append_printf (string, " %s\n", name, value); } g_free (value); } } /** * gimp_metadata_serialize: * @metadata: A #GimpMetadata instance. * * Serializes @metadata into an XML string that can later be deserialized * using gimp_metadata_deserialize(). * * Return value: The serialized XML string. * * Since: 2.10 */ gchar * gimp_metadata_serialize (GimpMetadata *metadata) { GString *string; gchar **exif_data = NULL; gchar **iptc_data = NULL; gchar **xmp_data = NULL; gchar *value; gchar *escaped; gboolean base64; gint i; g_return_val_if_fail (GEXIV2_IS_METADATA (metadata), NULL); string = g_string_new (NULL); g_string_append (string, "\n"); g_string_append (string, "\n"); exif_data = gexiv2_metadata_get_exif_tags (metadata); if (exif_data) { for (i = 0; exif_data[i] != NULL; i++) { value = gexiv2_metadata_get_tag_string (metadata, exif_data[i]); escaped = gimp_metadata_escape (exif_data[i], value, &base64); g_free (value); gimp_metadata_append_tag (string, exif_data[i], escaped, base64); } g_strfreev (exif_data); } xmp_data = gexiv2_metadata_get_xmp_tags (metadata); if (xmp_data) { for (i = 0; xmp_data[i] != NULL; i++) { value = gexiv2_metadata_get_tag_string (metadata, xmp_data[i]); escaped = gimp_metadata_escape (xmp_data[i], value, &base64); g_free (value); gimp_metadata_append_tag (string, xmp_data[i], escaped, base64); } g_strfreev (xmp_data); } iptc_data = gexiv2_metadata_get_iptc_tags (metadata); if (iptc_data) { for (i = 0; iptc_data[i] != NULL; i++) { value = gexiv2_metadata_get_tag_string (metadata, iptc_data[i]); escaped = gimp_metadata_escape (iptc_data[i], value, &base64); g_free (value); gimp_metadata_append_tag (string, iptc_data[i], escaped, base64); } g_strfreev (iptc_data); } g_string_append (string, "\n"); return g_string_free (string, FALSE); } /** * gimp_metadata_load_from_file: * @file: The #GFile to load the metadata from * @error: Return location for error message * * Loads #GimpMetadata from @file. * * Return value: The loaded #GimpMetadata. * * Since: 2.10 */ GimpMetadata * gimp_metadata_load_from_file (GFile *file, GError **error) { GExiv2Metadata *meta = NULL; gchar *path; gchar *filename; g_return_val_if_fail (G_IS_FILE (file), NULL); g_return_val_if_fail (error == NULL || *error == NULL, NULL); path = g_file_get_path (file); if (! path) { g_set_error (error, gimp_metadata_error_quark (), 0, _("Can load metadata only from local files")); return NULL; } #ifdef G_OS_WIN32 filename = g_win32_locale_filename_from_utf8 (path); #else filename = g_strdup (path); #endif g_free (path); if (gexiv2_initialize ()) { meta = gexiv2_metadata_new (); if (! gexiv2_metadata_open_path (meta, filename, error)) { g_object_unref (meta); g_free (filename); return NULL; } } g_free (filename); return meta; } /** * gimp_metadata_save_to_file: * @metadata: A #GimpMetadata instance. * @file: The file to save the metadata to * @error: Return location for error message * * Saves @metadata to @file. * * Return value: %TRUE on success, %FALSE otherwise. * * Since: 2.10 */ gboolean gimp_metadata_save_to_file (GimpMetadata *metadata, GFile *file, GError **error) { gchar *path; gchar *filename; gboolean success; g_return_val_if_fail (GEXIV2_IS_METADATA (metadata), FALSE); g_return_val_if_fail (G_IS_FILE (file), FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); path = g_file_get_path (file); if (! path) { g_set_error (error, gimp_metadata_error_quark (), 0, _("Can save metadata only to local files")); return FALSE; } #ifdef G_OS_WIN32 filename = g_win32_locale_filename_from_utf8 (path); #else filename = g_strdup (path); #endif g_free (path); success = gexiv2_metadata_save_file (metadata, filename, error); g_free (filename); return success; } /** * gimp_metadata_set_from_exif: * @metadata: A #GimpMetadata instance. * @exif_data: The blob of Exif data to set * @exif_data_length: Length of @exif_data, in bytes * @error: Return location for error message * * Sets the tags from a piece of Exif data on @metadata. * * Return value: %TRUE on success, %FALSE otherwise. * * Since: 2.10 */ gboolean gimp_metadata_set_from_exif (GimpMetadata *metadata, const guchar *exif_data, gint exif_data_length, GError **error) { GByteArray *exif_bytes; GimpMetadata *exif_metadata; guint8 data_size[2] = { 0, }; const guint8 eoi[2] = { 0xff, 0xd9 }; g_return_val_if_fail (GEXIV2_IS_METADATA (metadata), FALSE); g_return_val_if_fail (exif_data != NULL, FALSE); g_return_val_if_fail (exif_data_length > 0, FALSE); g_return_val_if_fail (exif_data_length + 2 < 65536, FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); data_size[0] = ((exif_data_length + 2) & 0xFF00) >> 8; data_size[1] = ((exif_data_length + 2) & 0x00FF); exif_bytes = g_byte_array_new (); exif_bytes = g_byte_array_append (exif_bytes, minimal_exif, G_N_ELEMENTS (minimal_exif)); exif_bytes = g_byte_array_append (exif_bytes, data_size, 2); exif_bytes = g_byte_array_append (exif_bytes, (guint8 *) exif_data, exif_data_length); exif_bytes = g_byte_array_append (exif_bytes, eoi, 2); exif_metadata = gimp_metadata_new (); if (! gexiv2_metadata_open_buf (exif_metadata, exif_bytes->data, exif_bytes->len, error)) { g_object_unref (exif_metadata); g_byte_array_free (exif_bytes, TRUE); return FALSE; } if (! gexiv2_metadata_has_exif (exif_metadata)) { g_set_error (error, gimp_metadata_error_quark (), 0, _("Parsing Exif data failed.")); g_object_unref (exif_metadata); g_byte_array_free (exif_bytes, TRUE); return FALSE; } gimp_metadata_add (exif_metadata, metadata); g_object_unref (exif_metadata); g_byte_array_free (exif_bytes, TRUE); return TRUE; } /** * gimp_metadata_set_from_xmp: * @metadata: A #GimpMetadata instance. * @xmp_data: The blob of Exif data to set * @xmp_data_length: Length of @exif_data, in bytes * @error: Return location for error message * * Sets the tags from a piece of XMP data on @metadata. * * Return value: %TRUE on success, %FALSE otherwise. * * Since: 2.10 */ gboolean gimp_metadata_set_from_xmp (GimpMetadata *metadata, const guchar *xmp_data, gint xmp_data_length, GError **error) { GimpMetadata *xmp_metadata; g_return_val_if_fail (GEXIV2_IS_METADATA (metadata), FALSE); g_return_val_if_fail (xmp_data != NULL, FALSE); g_return_val_if_fail (xmp_data_length > 0, FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); xmp_metadata = gimp_metadata_new (); if (! gexiv2_metadata_open_buf (xmp_metadata, xmp_data, xmp_data_length, error)) { g_object_unref (xmp_metadata); return FALSE; } if (! gexiv2_metadata_has_xmp (xmp_metadata)) { g_set_error (error, gimp_metadata_error_quark (), 0, _("Parsing XMP data failed.")); g_object_unref (xmp_metadata); return FALSE; } gimp_metadata_add (xmp_metadata, metadata); g_object_unref (xmp_metadata); return TRUE; } /** * gimp_metadata_set_pixel_size: * @metadata: A #GimpMetadata instance. * @width: Width in pixels * @height: Height in pixels * * Sets Exif.Image.ImageWidth and Exif.Image.ImageLength on @metadata. * * Since: 2.10 */ void gimp_metadata_set_pixel_size (GimpMetadata *metadata, gint width, gint height) { gchar buffer[32]; g_return_if_fail (GEXIV2_IS_METADATA (metadata)); g_snprintf (buffer, sizeof (buffer), "%d", width); gexiv2_metadata_set_tag_string (metadata, "Exif.Image.ImageWidth", buffer); g_snprintf (buffer, sizeof (buffer), "%d", height); gexiv2_metadata_set_tag_string (metadata, "Exif.Image.ImageLength", buffer); } /** * gimp_metadata_set_bits_per_sample: * @metadata: A #GimpMetadata instance. * @bits_per_sample: Bits per pixel, per component * * Sets Exif.Image.BitsPerSample on @metadata. * * Since: 2.10 */ void gimp_metadata_set_bits_per_sample (GimpMetadata *metadata, gint bits_per_sample) { gchar buffer[32]; g_return_if_fail (GEXIV2_IS_METADATA (metadata)); g_snprintf (buffer, sizeof (buffer), "%d %d %d", bits_per_sample, bits_per_sample, bits_per_sample); gexiv2_metadata_set_tag_string (metadata, "Exif.Image.BitsPerSample", buffer); } /** * gimp_metadata_get_resolution: * @metadata: A #GimpMetadata instance. * @xres: Return location for the X Resolution, in ppi * @yres: Return location for the Y Resolution, in ppi * @unit: Return location for the unit unit * * Returns values based on Exif.Image.XResolution, * Exif.Image.YResolution and Exif.Image.ResolutionUnit of @metadata. * * Return value: %TRUE on success, %FALSE otherwise. * * Since: 2.10 */ gboolean gimp_metadata_get_resolution (GimpMetadata *metadata, gdouble *xres, gdouble *yres, GimpUnit *unit) { gint xnom, xdenom; gint ynom, ydenom; g_return_val_if_fail (GEXIV2_IS_METADATA (metadata), FALSE); if (gexiv2_metadata_get_exif_tag_rational (metadata, "Exif.Image.XResolution", &xnom, &xdenom) && gexiv2_metadata_get_exif_tag_rational (metadata, "Exif.Image.YResolution", &ynom, &ydenom)) { gchar *un; gint exif_unit = 2; un = gexiv2_metadata_get_tag_string (metadata, "Exif.Image.ResolutionUnit"); if (un) { exif_unit = atoi (un); g_free (un); } if (xnom != 0 && xdenom != 0 && ynom != 0 && ydenom != 0) { gdouble xresolution = (gdouble) xnom / (gdouble) xdenom; gdouble yresolution = (gdouble) ynom / (gdouble) ydenom; if (exif_unit == 3) { xresolution *= 2.54; yresolution *= 2.54; } if (xresolution >= GIMP_MIN_RESOLUTION && xresolution <= GIMP_MAX_RESOLUTION && yresolution >= GIMP_MIN_RESOLUTION && yresolution <= GIMP_MAX_RESOLUTION) { if (xres) *xres = xresolution; if (yres) *yres = yresolution; if (unit) { if (exif_unit == 3) *unit = GIMP_UNIT_MM; else *unit = GIMP_UNIT_INCH; } return TRUE; } } } return FALSE; } /** * gimp_metadata_set_resolution: * @metadata: A #GimpMetadata instance. * @xres: The image's X Resolution, in ppi * @yres: The image's Y Resolution, in ppi * @unit: The image's unit * * Sets Exif.Image.XResolution, Exif.Image.YResolution and * Exif.Image.ResolutionUnit of @metadata. * * Since: 2.10 */ void gimp_metadata_set_resolution (GimpMetadata *metadata, gdouble xres, gdouble yres, GimpUnit unit) { gchar buffer[32]; gint exif_unit; gint factor; g_return_if_fail (GEXIV2_IS_METADATA (metadata)); if (gimp_unit_is_metric (unit)) { xres /= 2.54; yres /= 2.54; exif_unit = 3; } else { exif_unit = 2; } for (factor = 1; factor <= 100 /* arbitrary */; factor++) { if (fabs (xres * factor - ROUND (xres * factor)) < 0.01 && fabs (yres * factor - ROUND (yres * factor)) < 0.01) break; } gexiv2_metadata_set_exif_tag_rational (metadata, "Exif.Image.XResolution", ROUND (xres * factor), factor); gexiv2_metadata_set_exif_tag_rational (metadata, "Exif.Image.YResolution", ROUND (yres * factor), factor); g_snprintf (buffer, sizeof (buffer), "%d", exif_unit); gexiv2_metadata_set_tag_string (metadata, "Exif.Image.ResolutionUnit", buffer); } /** * gimp_metadata_get_colorspace: * @metadata: A #GimpMetadata instance. * * Returns values based on Exif.Photo.ColorSpace, Xmp.exif.ColorSpace, * Exif.Iop.InteroperabilityIndex, Exif.Nikon3.ColorSpace, * Exif.Canon.ColorSpace of @metadata. * * Return value: The colorspace specified by above tags. * * Since: 2.10 */ GimpMetadataColorspace gimp_metadata_get_colorspace (GimpMetadata *metadata) { glong exif_cs = -1; g_return_val_if_fail (GEXIV2_IS_METADATA (metadata), GIMP_METADATA_COLORSPACE_UNSPECIFIED); /* the logic here was mostly taken from darktable and libkexiv2 */ if (gexiv2_metadata_has_tag (metadata, "Exif.Photo.ColorSpace")) { exif_cs = gexiv2_metadata_get_tag_long (metadata, "Exif.Photo.ColorSpace"); } else if (gexiv2_metadata_has_tag (metadata, "Xmp.exif.ColorSpace")) { exif_cs = gexiv2_metadata_get_tag_long (metadata, "Xmp.exif.ColorSpace"); } if (exif_cs == 0x01) { return GIMP_METADATA_COLORSPACE_SRGB; } else if (exif_cs == 0x02) { return GIMP_METADATA_COLORSPACE_ADOBERGB; } else { if (exif_cs == 0xffff) { gchar *iop_index; iop_index = gexiv2_metadata_get_tag_string (metadata, "Exif.Iop.InteroperabilityIndex"); if (! g_strcmp0 (iop_index, "R03")) { g_free (iop_index); return GIMP_METADATA_COLORSPACE_ADOBERGB; } else if (! g_strcmp0 (iop_index, "R98")) { g_free (iop_index); return GIMP_METADATA_COLORSPACE_SRGB; } g_free (iop_index); } if (gexiv2_metadata_has_tag (metadata, "Exif.Nikon3.ColorSpace")) { glong nikon_cs; nikon_cs = gexiv2_metadata_get_tag_long (metadata, "Exif.Nikon3.ColorSpace"); if (nikon_cs == 0x01) { return GIMP_METADATA_COLORSPACE_SRGB; } else if (nikon_cs == 0x02) { return GIMP_METADATA_COLORSPACE_ADOBERGB; } } if (gexiv2_metadata_has_tag (metadata, "Exif.Canon.ColorSpace")) { glong canon_cs; canon_cs = gexiv2_metadata_get_tag_long (metadata, "Exif.Canon.ColorSpace"); if (canon_cs == 0x01) { return GIMP_METADATA_COLORSPACE_SRGB; } else if (canon_cs == 0x02) { return GIMP_METADATA_COLORSPACE_ADOBERGB; } } if (exif_cs == 0xffff) return GIMP_METADATA_COLORSPACE_UNCALIBRATED; } return GIMP_METADATA_COLORSPACE_UNSPECIFIED; } /** * gimp_metadata_set_colorspace: * @metadata: A #GimpMetadata instance. * @colorspace: The color space. * * Sets Exif.Photo.ColorSpace, Xmp.exif.ColorSpace, * Exif.Iop.InteroperabilityIndex, Exif.Nikon3.ColorSpace, * Exif.Canon.ColorSpace of @metadata. * * Since: 2.10 */ void gimp_metadata_set_colorspace (GimpMetadata *metadata, GimpMetadataColorspace colorspace) { g_return_if_fail (GEXIV2_IS_METADATA (metadata)); switch (colorspace) { case GIMP_METADATA_COLORSPACE_UNSPECIFIED: gexiv2_metadata_clear_tag (metadata, "Exif.Photo.ColorSpace"); gexiv2_metadata_clear_tag (metadata, "Xmp.exif.ColorSpace"); gexiv2_metadata_clear_tag (metadata, "Exif.Iop.InteroperabilityIndex"); gexiv2_metadata_clear_tag (metadata, "Exif.Nikon3.ColorSpace"); gexiv2_metadata_clear_tag (metadata, "Exif.Canon.ColorSpace"); break; case GIMP_METADATA_COLORSPACE_UNCALIBRATED: gexiv2_metadata_set_tag_long (metadata, "Exif.Photo.ColorSpace", 0xffff); if (gexiv2_metadata_has_tag (metadata, "Xmp.exif.ColorSpace")) gexiv2_metadata_set_tag_long (metadata, "Xmp.exif.ColorSpace", 0xffff); gexiv2_metadata_clear_tag (metadata, "Exif.Iop.InteroperabilityIndex"); gexiv2_metadata_clear_tag (metadata, "Exif.Nikon3.ColorSpace"); gexiv2_metadata_clear_tag (metadata, "Exif.Canon.ColorSpace"); break; case GIMP_METADATA_COLORSPACE_SRGB: gexiv2_metadata_set_tag_long (metadata, "Exif.Photo.ColorSpace", 0x01); if (gexiv2_metadata_has_tag (metadata, "Xmp.exif.ColorSpace")) gexiv2_metadata_set_tag_long (metadata, "Xmp.exif.ColorSpace", 0x01); if (gexiv2_metadata_has_tag (metadata, "Exif.Iop.InteroperabilityIndex")) gexiv2_metadata_set_tag_string (metadata, "Exif.Iop.InteroperabilityIndex", "R98"); if (gexiv2_metadata_has_tag (metadata, "Exif.Nikon3.ColorSpace")) gexiv2_metadata_set_tag_long (metadata, "Exif.Nikon3.ColorSpace", 0x01); if (gexiv2_metadata_has_tag (metadata, "Exif.Canon.ColorSpace")) gexiv2_metadata_set_tag_long (metadata, "Exif.Canon.ColorSpace", 0x01); break; case GIMP_METADATA_COLORSPACE_ADOBERGB: gexiv2_metadata_set_tag_long (metadata, "Exif.Photo.ColorSpace", 0x02); if (gexiv2_metadata_has_tag (metadata, "Xmp.exif.ColorSpace")) gexiv2_metadata_set_tag_long (metadata, "Xmp.exif.ColorSpace", 0x02); if (gexiv2_metadata_has_tag (metadata, "Exif.Iop.InteroperabilityIndex")) gexiv2_metadata_set_tag_string (metadata, "Exif.Iop.InteroperabilityIndex", "R03"); if (gexiv2_metadata_has_tag (metadata, "Exif.Nikon3.ColorSpace")) gexiv2_metadata_set_tag_long (metadata, "Exif.Nikon3.ColorSpace", 0x02); if (gexiv2_metadata_has_tag (metadata, "Exif.Canon.ColorSpace")) gexiv2_metadata_set_tag_long (metadata, "Exif.Canon.ColorSpace", 0x02); break; } } /** * gimp_metadata_is_tag_supported: * @tag: A metadata tag name * @mime_type: A mime type * * Returns whether @tag is supported in a file of type @mime_type. * * Return value: %TRUE if the @tag supported with @mime_type, %FALSE otherwise. * * Since: 2.10 */ gboolean gimp_metadata_is_tag_supported (const gchar *tag, const gchar *mime_type) { gint j; g_return_val_if_fail (tag != NULL, FALSE); g_return_val_if_fail (mime_type != NULL, FALSE); for (j = 0; j < G_N_ELEMENTS (unsupported_tags); j++) { if (g_str_has_prefix (tag, unsupported_tags[j])) { return FALSE; } } if (! strcmp (mime_type, "image/jpeg")) { for (j = 0; j < G_N_ELEMENTS (tiff_tags); j++) { if (g_str_has_prefix (tag, tiff_tags[j])) { return FALSE; } } } else if (! strcmp (mime_type, "image/tiff")) { for (j = 0; j < G_N_ELEMENTS (jpeg_tags); j++) { if (g_str_has_prefix (tag, jpeg_tags[j])) { return FALSE; } } } return TRUE; } /* private functions */ static GQuark gimp_metadata_error_quark (void) { static GQuark quark = 0; if (G_UNLIKELY (quark == 0)) quark = g_quark_from_static_string ("gimp-metadata-error-quark"); return quark; } static void gimp_metadata_add (GimpMetadata *src, GimpMetadata *dest) { gchar *value; gint i; if (gexiv2_metadata_get_supports_exif (src) && gexiv2_metadata_get_supports_exif (dest)) { gchar **exif_data = gexiv2_metadata_get_exif_tags (src); if (exif_data) { for (i = 0; exif_data[i] != NULL; i++) { value = gexiv2_metadata_get_tag_string (src, exif_data[i]); gexiv2_metadata_set_tag_string (dest, exif_data[i], value); g_free (value); } g_strfreev (exif_data); } } if (gexiv2_metadata_get_supports_xmp (src) && gexiv2_metadata_get_supports_xmp (dest)) { gchar **xmp_data = gexiv2_metadata_get_xmp_tags (src); if (xmp_data) { for (i = 0; xmp_data[i] != NULL; i++) { value = gexiv2_metadata_get_tag_string (src, xmp_data[i]); gexiv2_metadata_set_tag_string (dest, xmp_data[i], value); g_free (value); } g_strfreev (xmp_data); } } if (gexiv2_metadata_get_supports_iptc (src) && gexiv2_metadata_get_supports_iptc (dest)) { gchar **iptc_data = gexiv2_metadata_get_iptc_tags (src); if (iptc_data) { for (i = 0; iptc_data[i] != NULL; i++) { value = gexiv2_metadata_get_tag_string (src, iptc_data[i]); gexiv2_metadata_set_tag_string (dest, iptc_data[i], value); g_free (value); } g_strfreev (iptc_data); } } }