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gimp/libgimp/gimpimagemetadata-save.c
Daniel Novomeský ff87bc8d4d libgimp: new gimp_image_metadata_save_filter API 
This new function is an alternative to existing
gimp_image_metadata_save_finish, when you want to save metadata
yourself and you need only filtering processing.
It returns filtered metadata allowing the caller
to save the finalized metadata via other means
(via native format’s library for example)
This API can be used to support metadata saving of image formats
not directly supported by gexiv2/exiv2.
2022-03-16 13:00:03 +00:00

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-2000 Peter Mattis and Spencer Kimball
*
* gimpimagemetadata-save.c
*
* 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
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <sys/time.h>
#include <gexiv2/gexiv2.h>
#include "gimp.h"
#include "gimpimagemetadata.h"
#include "libgimp-intl.h"
typedef struct
{
gchar *tag;
gint type;
} XmpStructs;
/* public functions */
/**
* gimp_image_metadata_save_prepare:
* @image: The original image
* @mime_type: The saved file's mime-type
* @suggested_flags: Suggested default values for the @flags passed to
* gimp_image_metadata_save_finish()
*
* Gets the image metadata for saving it using
* gimp_image_metadata_save_finish().
*
* The @suggested_flags are determined from what kind of metadata
* (Exif, XMP, ...) is actually present in the image and the preferences
* for metadata exporting.
* The calling application may still update @available_flags, for
* instance to follow the settings from a previous export in the same
* session, or a previous export of the same image. But it should not
* override the preferences without a good reason since it is a data
* leak.
*
* The suggested value for %GIMP_METADATA_SAVE_THUMBNAIL is determined by
* whether there was a thumbnail in the previously imported image.
*
* Returns: (transfer full): The image's metadata, prepared for saving.
*
* Since: 2.10
*/
GimpMetadata *
gimp_image_metadata_save_prepare (GimpImage *image,
const gchar *mime_type,
GimpMetadataSaveFlags *suggested_flags)
{
GimpMetadata *metadata;
GError *error = NULL;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
g_return_val_if_fail (mime_type != NULL, NULL);
g_return_val_if_fail (suggested_flags != NULL, NULL);
*suggested_flags = GIMP_METADATA_SAVE_ALL;
metadata = gimp_image_get_metadata (image);
if (metadata)
{
GDateTime *datetime;
GimpParasite *comment_parasite;
gchar *comment = NULL;
gint image_width;
gint image_height;
gdouble xres;
gdouble yres;
gchar buffer[32];
gchar *str;
GExiv2Metadata *g2metadata = GEXIV2_METADATA (metadata);
image_width = gimp_image_get_width (image);
image_height = gimp_image_get_height (image);
datetime = g_date_time_new_now_local ();
comment_parasite = gimp_image_get_parasite (image, "gimp-comment");
if (comment_parasite)
{
guint32 parasite_size;
comment = (gchar *) gimp_parasite_get_data (comment_parasite, &parasite_size);
comment = g_strndup (comment, parasite_size);
gimp_parasite_free (comment_parasite);
}
/* Exif */
if (! gimp_export_exif () ||
! gexiv2_metadata_has_exif (g2metadata))
*suggested_flags &= ~GIMP_METADATA_SAVE_EXIF;
if (comment)
{
gexiv2_metadata_try_set_tag_string (g2metadata,
"Exif.Photo.UserComment",
comment, &error);
if (error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Exif.Photo.UserComment", error->message);
g_clear_error (&error);
}
gexiv2_metadata_try_set_tag_string (g2metadata,
"Exif.Image.ImageDescription",
comment, &error);
if (error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Exif.Image.ImageDescription", error->message);
g_clear_error (&error);
}
}
g_snprintf (buffer, sizeof (buffer),
"%d:%02d:%02d %02d:%02d:%02d",
g_date_time_get_year (datetime),
g_date_time_get_month (datetime),
g_date_time_get_day_of_month (datetime),
g_date_time_get_hour (datetime),
g_date_time_get_minute (datetime),
g_date_time_get_second (datetime));
gexiv2_metadata_try_set_tag_string (g2metadata,
"Exif.Image.DateTime",
buffer, &error);
if (error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Exif.Image.DateTime", error->message);
g_clear_error (&error);
}
gexiv2_metadata_try_set_tag_string (g2metadata,
"Exif.Image.Software",
PACKAGE_STRING, &error);
if (error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Exif.Image.Software", error->message);
g_clear_error (&error);
}
gimp_metadata_set_pixel_size (metadata,
image_width, image_height);
gimp_image_get_resolution (image, &xres, &yres);
gimp_metadata_set_resolution (metadata, xres, yres,
gimp_image_get_unit (image));
/* XMP */
if (! gimp_export_xmp () ||
! gexiv2_metadata_has_xmp (g2metadata))
*suggested_flags &= ~GIMP_METADATA_SAVE_XMP;
gexiv2_metadata_try_set_tag_string (g2metadata,
"Xmp.dc.Format",
mime_type, &error);
if (error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Xmp.dc.Format", error->message);
g_clear_error (&error);
}
if (! g_strcmp0 (mime_type, "image/tiff"))
{
/* TIFF specific XMP data */
g_snprintf (buffer, sizeof (buffer), "%d", image_width);
gexiv2_metadata_try_set_tag_string (g2metadata,
"Xmp.tiff.ImageWidth",
buffer, &error);
if (error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Xmp.tiff.ImageWidth", error->message);
g_clear_error (&error);
}
g_snprintf (buffer, sizeof (buffer), "%d", image_height);
gexiv2_metadata_try_set_tag_string (g2metadata,
"Xmp.tiff.ImageLength",
buffer, &error);
if (error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Xmp.tiff.ImageLength", error->message);
g_clear_error (&error);
}
g_snprintf (buffer, sizeof (buffer),
"%d:%02d:%02d %02d:%02d:%02d",
g_date_time_get_year (datetime),
g_date_time_get_month (datetime),
g_date_time_get_day_of_month (datetime),
g_date_time_get_hour (datetime),
g_date_time_get_minute (datetime),
g_date_time_get_second (datetime));
gexiv2_metadata_try_set_tag_string (g2metadata,
"Xmp.tiff.DateTime",
buffer, &error);
if (error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Xmp.tiff.DateTime", error->message);
g_clear_error (&error);
}
}
/* IPTC */
if (! gimp_export_iptc () ||
! gexiv2_metadata_has_iptc (g2metadata))
*suggested_flags &= ~GIMP_METADATA_SAVE_IPTC;
str = g_date_time_format (datetime, "%Y-%m-%d");
gexiv2_metadata_try_set_tag_string (g2metadata,
"Iptc.Application2.DateCreated",
str, &error);
if (error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Iptc.Application2.DateCreated",
error->message);
g_clear_error (&error);
}
g_free (str);
str = g_date_time_format (datetime, "%H:%M:%S%:z");
gexiv2_metadata_try_set_tag_string (g2metadata,
"Iptc.Application2.TimeCreated",
str, &error);
if (error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Iptc.Application2.TimeCreated",
error->message);
g_clear_error (&error);
}
g_free (str);
g_date_time_unref (datetime);
g_clear_pointer (&comment, g_free);
}
else
{
/* At least initialize the returned flags with preferences defaults */
if (! gimp_export_exif ())
*suggested_flags &= ~GIMP_METADATA_SAVE_EXIF;
if (! gimp_export_xmp ())
*suggested_flags &= ~GIMP_METADATA_SAVE_XMP;
if (! gimp_export_iptc ())
*suggested_flags &= ~GIMP_METADATA_SAVE_IPTC;
}
/* Thumbnail */
if (! gimp_export_thumbnail () /* FIXME if (original image had a thumbnail) */)
*suggested_flags &= ~GIMP_METADATA_SAVE_THUMBNAIL;
/* Color profile */
if (! gimp_export_color_profile ())
*suggested_flags &= ~GIMP_METADATA_SAVE_COLOR_PROFILE;
/* Comment */
if (! gimp_export_comment ())
*suggested_flags &= ~GIMP_METADATA_SAVE_COMMENT;
return metadata;
}
static const gchar *
gimp_fix_xmp_tag (const gchar *tag)
{
gchar *substring;
/* Due to problems using /Iptc4xmpExt namespace (/iptcExt is used
* instead by Exiv2) we replace all occurrences with /iptcExt which
* is valid but less common. Not doing so would cause saving xmp
* metadata to fail. This has to be done after getting the values
* from the source metadata since that source uses the original
* tag names and would otherwise return NULL as value.
* /Iptc4xmpExt length = 12
* /iptcExt length = 8
*/
substring = strstr (tag, "/Iptc4xmpExt");
while (substring)
{
gint len_tag = strlen (tag);
gint len_end;
len_end = len_tag - (substring - tag) - 12;
strncpy (substring, "/iptcExt", 8);
substring += 8;
/* Using memmove: we have overlapping source and dest */
memmove (substring, substring+4, len_end);
substring[len_end] = '\0';
g_debug ("Fixed tag value: %s", tag);
/* Multiple occurrences are possible: e.g.:
* Xmp.iptcExt.ImageRegion[3]/Iptc4xmpExt:RegionBoundary/Iptc4xmpExt:rbVertices[1]/Iptc4xmpExt:rbX
*/
substring = strstr (tag, "/Iptc4xmpExt");
}
return tag;
}
static void
gimp_image_metadata_copy_tag (GExiv2Metadata *src,
GExiv2Metadata *dest,
const gchar *tag)
{
gchar **values = gexiv2_metadata_try_get_tag_multiple (src, tag, NULL);
GError *error = NULL;
if (values)
{
gchar *temp_tag;
/* Xmp always seems to return multiple values */
if (g_str_has_prefix (tag, "Xmp."))
temp_tag = (gchar *) gimp_fix_xmp_tag (g_strdup (tag));
else
temp_tag = g_strdup (tag);
g_debug ("Copy multi tag %s, first value: %s", temp_tag, values[0]);
gexiv2_metadata_try_set_tag_multiple (dest, temp_tag,
(const gchar **) values,
&error);
if (error)
{
g_warning ("%s: failed to set multiple metadata '%s': %s\n",
G_STRFUNC, tag, error->message);
g_clear_error (&error);
}
g_free (temp_tag);
g_strfreev (values);
}
else
{
gchar *value = gexiv2_metadata_try_get_tag_string (src, tag, &error);
if (value)
{
g_debug ("Copy tag %s, value: %s", tag, value);
gexiv2_metadata_try_set_tag_string (dest, tag, value, &error);
if (error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, tag, error->message);
g_clear_error (&error);
}
g_free (value);
}
else if (error)
{
g_warning ("%s: failed to get metadata '%s': %s\n",
G_STRFUNC, tag, error->message);
g_clear_error (&error);
}
}
}
static gint
gimp_natural_sort_compare (gconstpointer left,
gconstpointer right)
{
gint compare;
gchar *left_key = g_utf8_collate_key_for_filename ((gchar *) left, -1);
gchar *right_key = g_utf8_collate_key_for_filename ((gchar *) right, -1);
compare = g_strcmp0 (left_key, right_key);
g_free (left_key);
g_free (right_key);
return compare;
}
static GList*
gimp_image_metadata_convert_tags_to_list (gchar **xmp_tags)
{
GList *list = NULL;
gint i;
for (i = 0; xmp_tags[i] != NULL; i++)
{
g_debug ("Tag: %s, tag type: %s", xmp_tags[i], gexiv2_metadata_try_get_tag_type (xmp_tags[i], NULL));
list = g_list_prepend (list, xmp_tags[i]);
}
return list;
}
static GExiv2StructureType
gimp_image_metadata_get_xmp_struct_type (const gchar *tag)
{
GError *error = NULL;
g_debug ("Struct type for tag: %s, type: %s", tag, gexiv2_metadata_try_get_tag_type (tag, NULL));
if (! g_strcmp0 (gexiv2_metadata_try_get_tag_type (tag, &error), "XmpSeq"))
{
return GEXIV2_STRUCTURE_XA_SEQ;
}
if (error)
{
g_printerr ("%s: failed to get type of tag '%s': %s\n",
G_STRFUNC, tag, error->message);
g_clear_error (&error);
}
return GEXIV2_STRUCTURE_XA_BAG;
}
static void
gimp_image_metadata_set_xmp_structs (GList *xmp_list,
GExiv2Metadata *metadata)
{
GList *list;
gchar *prev_one = NULL;
gchar *prev_two = NULL;
for (list = xmp_list; list != NULL; list = list->next)
{
gchar **tag_split;
/*
* Most tags with structs have only one struct part, like:
* Xmp.xmpMM.History[1]...
* However there are also Xmp tags that have two
* structs in one tag, e.g.:
* Xmp.crs.GradientBasedCorrections[1]/crs:CorrectionMasks[1]...
*/
tag_split = g_strsplit ((gchar *) list->data, "[1]", 3);
/* Check if there are at least two parts but don't catch xxx[2]/yyy[1]/zzz */
if (tag_split && tag_split[1] && ! strstr (tag_split[0], "["))
{
GError *error = NULL;
if (! prev_one || strcmp (tag_split[0], prev_one) != 0)
{
GExiv2StructureType type;
g_free (prev_one);
prev_one = g_strdup (tag_split[0]);
type = gimp_image_metadata_get_xmp_struct_type (gimp_fix_xmp_tag (tag_split[0]));
gexiv2_metadata_try_set_xmp_tag_struct (GEXIV2_METADATA (metadata),
prev_one, type, &error);
if (error)
{
g_printerr ("%s: failed to set XMP struct '%s': %s\n",
G_STRFUNC, prev_one, error->message);
g_clear_error (&error);
}
}
if (tag_split[2] && (!prev_two || strcmp (tag_split[1], prev_two) != 0))
{
gchar *second_struct;
GExiv2StructureType type;
g_free (prev_two);
prev_two = g_strdup (tag_split[1]);
second_struct = g_strdup_printf ("%s[1]%s", prev_one, gimp_fix_xmp_tag(prev_two));
type = gimp_image_metadata_get_xmp_struct_type (gimp_fix_xmp_tag (tag_split[1]));
gexiv2_metadata_try_set_xmp_tag_struct (GEXIV2_METADATA (metadata),
second_struct, type, &error);
if (error)
{
g_printerr ("%s: failed to set XMP struct '%s': %s\n",
G_STRFUNC, second_struct, error->message);
g_clear_error (&error);
}
g_free (second_struct);
}
}
g_strfreev (tag_split);
}
g_free (prev_one);
g_free (prev_two);
}
/**
* gimp_image_metadata_save_filter:
* @image: The actually saved image
* @mime_type: The saved file's mime-type
* @metadata: The metadata to export
* @flags: Flags to specify what of the metadata to save
* @file: The file @image was saved to or NULL if file was not saved yet
* @error: Return location for error message
*
* Filters the @metadata retrieved from the image with
* gimp_image_metadata_save_prepare(),
* taking into account the passed @flags.
*
* Note that the @image passed to this function might be different
* from the image passed to gimp_image_metadata_save_prepare(), due
* to whatever file export conversion happened in the meantime
*
* This is an alternative to gimp_image_metadata_save_finish when you
* want to save metadata yourself and you need only filtering processing.
*
* Returns: Filtered metadata or NULL in case of failure.
*
* Use g_object_unref() when returned metadata are no longer needed
*
* Since: 3.0
*/
GimpMetadata *
gimp_image_metadata_save_filter (GimpImage *image,
const gchar *mime_type,
GimpMetadata *metadata,
GimpMetadataSaveFlags flags,
GFile *file,
GError **error)
{
GimpMetadata *new_metadata;
GExiv2Metadata *new_g2metadata;
/* Error for cases where we have full control, such as metadata tags
* and contents. So we don't propagate these in @error (for things out
* of our control, such as read or write errors), but we use them as
* internal warning for bugs.
*/
GError *code_error = NULL;
gboolean support_exif;
gboolean support_xmp;
gboolean support_iptc;
gint i;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
g_return_val_if_fail (mime_type != NULL, NULL);
g_return_val_if_fail (GEXIV2_IS_METADATA (metadata), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
if (! (flags & (GIMP_METADATA_SAVE_EXIF |
GIMP_METADATA_SAVE_XMP |
GIMP_METADATA_SAVE_IPTC |
GIMP_METADATA_SAVE_THUMBNAIL)))
return NULL;
if (file)
{
/* read metadata from saved file */
new_metadata = gimp_metadata_load_from_file (file, error);
}
else
{
new_metadata = gimp_metadata_new ();
}
if (! new_metadata)
return NULL;
new_g2metadata = GEXIV2_METADATA (new_metadata);
support_exif = gexiv2_metadata_get_supports_exif (new_g2metadata);
support_xmp = gexiv2_metadata_get_supports_xmp (new_g2metadata);
support_iptc = gexiv2_metadata_get_supports_iptc (new_g2metadata);
if ((flags & GIMP_METADATA_SAVE_EXIF) && support_exif)
{
gchar **exif_data = gexiv2_metadata_get_exif_tags (GEXIV2_METADATA (metadata));
for (i = 0; exif_data[i] != NULL; i++)
{
if (! gexiv2_metadata_has_tag (new_g2metadata, exif_data[i]) &&
gimp_metadata_is_tag_supported (exif_data[i], mime_type))
{
gimp_image_metadata_copy_tag (GEXIV2_METADATA (metadata),
new_g2metadata,
exif_data[i]);
}
}
g_strfreev (exif_data);
}
if ((flags & GIMP_METADATA_SAVE_XMP) && support_xmp)
{
gchar **xmp_data;
struct timeval timer_usec;
gint64 timestamp_usec;
gchar ts[128];
GList *xmp_list = NULL;
GList *list;
gettimeofday (&timer_usec, NULL);
timestamp_usec = ((gint64) timer_usec.tv_sec) * 1000000ll +
(gint64) timer_usec.tv_usec;
g_snprintf (ts, sizeof (ts), "%" G_GINT64_FORMAT, timestamp_usec);
gimp_metadata_add_xmp_history (metadata, "");
gexiv2_metadata_try_set_tag_string (GEXIV2_METADATA (metadata),
"Xmp.GIMP.TimeStamp",
ts, &code_error);
if (code_error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Xmp.GIMP.TimeStamp", code_error->message);
g_clear_error (&code_error);
}
gexiv2_metadata_try_set_tag_string (GEXIV2_METADATA (metadata),
"Xmp.xmp.CreatorTool",
N_("GIMP"), &code_error);
if (code_error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Xmp.xmp.CreatorTool", code_error->message);
g_clear_error (&code_error);
}
gexiv2_metadata_try_set_tag_string (GEXIV2_METADATA (metadata),
"Xmp.GIMP.Version",
GIMP_VERSION, &code_error);
if (code_error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Xmp.GIMP.Version", code_error->message);
g_clear_error (&code_error);
}
gexiv2_metadata_try_set_tag_string (GEXIV2_METADATA (metadata),
"Xmp.GIMP.API",
GIMP_API_VERSION, &code_error);
if (code_error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Xmp.GIMP.API", code_error->message);
g_clear_error (&code_error);
}
gexiv2_metadata_try_set_tag_string (GEXIV2_METADATA (metadata),
"Xmp.GIMP.Platform",
#if defined(_WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)
"Windows",
#elif defined(__linux__)
"Linux",
#elif defined(__APPLE__) && defined(__MACH__)
"Mac OS",
#elif defined(unix) || defined(__unix__) || defined(__unix)
"Unix",
#else
"Unknown",
#endif
&code_error);
if (code_error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Xmp.GIMP.Platform", code_error->message);
g_clear_error (&code_error);
}
xmp_data = gexiv2_metadata_get_xmp_tags (GEXIV2_METADATA (metadata));
xmp_list = gimp_image_metadata_convert_tags_to_list (xmp_data);
xmp_list = g_list_sort (xmp_list, (GCompareFunc) gimp_natural_sort_compare);
gimp_image_metadata_set_xmp_structs (xmp_list, new_g2metadata);
for (list = xmp_list; list != NULL; list = list->next)
{
if (! gexiv2_metadata_has_tag (new_g2metadata, (gchar *) list->data) &&
gimp_metadata_is_tag_supported ((gchar *) list->data, mime_type))
{
gimp_image_metadata_copy_tag (GEXIV2_METADATA (metadata),
new_g2metadata,
(gchar *) list->data);
}
else
g_debug ("Ignored tag: %s", (gchar *) list->data);
}
g_list_free (xmp_list);
g_strfreev (xmp_data);
}
if ((flags & GIMP_METADATA_SAVE_IPTC) && support_iptc)
{
gchar **iptc_data = gexiv2_metadata_get_iptc_tags (GEXIV2_METADATA (metadata));
for (i = 0; iptc_data[i] != NULL; i++)
{
if (! gexiv2_metadata_has_tag (new_g2metadata, iptc_data[i]) &&
gimp_metadata_is_tag_supported (iptc_data[i], mime_type))
{
gimp_image_metadata_copy_tag (GEXIV2_METADATA (metadata),
new_g2metadata,
iptc_data[i]);
}
}
g_strfreev (iptc_data);
}
if (flags & GIMP_METADATA_SAVE_THUMBNAIL)
{
GdkPixbuf *thumb_pixbuf;
gchar *thumb_buffer;
gint image_width;
gint image_height;
gsize count;
gint thumbw;
gint thumbh;
#define EXIF_THUMBNAIL_SIZE 256
image_width = gimp_image_get_width (image);
image_height = gimp_image_get_height (image);
if (image_width > image_height)
{
thumbw = EXIF_THUMBNAIL_SIZE;
thumbh = EXIF_THUMBNAIL_SIZE * image_height / image_width;
}
else
{
thumbh = EXIF_THUMBNAIL_SIZE;
thumbw = EXIF_THUMBNAIL_SIZE * image_width / image_height;
}
thumb_pixbuf = gimp_image_get_thumbnail (image, thumbw, thumbh,
GIMP_PIXBUF_KEEP_ALPHA);
if (gdk_pixbuf_save_to_buffer (thumb_pixbuf, &thumb_buffer, &count,
"jpeg", NULL,
"quality", "75",
NULL))
{
gchar buffer[32];
gexiv2_metadata_set_exif_thumbnail_from_buffer (new_g2metadata,
(guchar *) thumb_buffer,
count);
g_snprintf (buffer, sizeof (buffer), "%d", thumbw);
gexiv2_metadata_try_set_tag_string (new_g2metadata,
"Exif.Thumbnail.ImageWidth",
buffer, &code_error);
if (code_error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Exif.Thumbnail.ImageWidth", code_error->message);
g_clear_error (&code_error);
}
g_snprintf (buffer, sizeof (buffer), "%d", thumbh);
gexiv2_metadata_try_set_tag_string (new_g2metadata,
"Exif.Thumbnail.ImageLength",
buffer, &code_error);
if (code_error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Exif.Thumbnail.ImageLength", code_error->message);
g_clear_error (&code_error);
}
gexiv2_metadata_try_set_tag_string (new_g2metadata,
"Exif.Thumbnail.BitsPerSample",
"8 8 8", &code_error);
if (code_error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Exif.Thumbnail.BitsPerSample", code_error->message);
g_clear_error (&code_error);
}
gexiv2_metadata_try_set_tag_string (new_g2metadata,
"Exif.Thumbnail.SamplesPerPixel",
"3", &code_error);
if (code_error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Exif.Thumbnail.SamplesPerPixel", code_error->message);
g_clear_error (&code_error);
}
gexiv2_metadata_try_set_tag_string (new_g2metadata,
"Exif.Thumbnail.PhotometricInterpretation",
"6", &code_error); /* old jpeg */
if (code_error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Exif.Thumbnail.PhotometricInterpretation",
code_error->message);
g_clear_error (&code_error);
}
gexiv2_metadata_try_set_tag_string (new_g2metadata,
"Exif.Thumbnail.NewSubfileType",
"1", &code_error); /* reduced resolution image */
if (code_error)
{
g_warning ("%s: failed to set metadata '%s': %s\n",
G_STRFUNC, "Exif.Thumbnail.NewSubfileType", code_error->message);
g_clear_error (&code_error);
}
g_free (thumb_buffer);
}
g_object_unref (thumb_pixbuf);
}
if (flags & GIMP_METADATA_SAVE_COLOR_PROFILE)
{
/* nothing to do, but if we ever need to modify metadata based
* on the exported color profile, this is probably the place to
* add it
*/
}
if (flags & GIMP_METADATA_SAVE_COMMENT)
{
/* nothing to do, blah blah */
}
return new_metadata;
}
/**
* gimp_image_metadata_save_finish:
* @image: The actually saved image
* @mime_type: The saved file's mime-type
* @metadata: The metadata to write to @file
* @flags: Flags to specify what of the metadata to save
* @file: The file @image was saved to
* @error: Return location for error message
*
* Saves the @metadata retrieved from the image with
* gimp_image_metadata_save_prepare() to @file, taking into account
* the passed @flags.
*
* Note that the @image passed to this function might be different
* from the image passed to gimp_image_metadata_save_prepare(), due
* to whatever file export conversion happened in the meantime
*
* Returns: Whether the save was successful.
*
* Since: 2.10
*/
gboolean
gimp_image_metadata_save_finish (GimpImage *image,
const gchar *mime_type,
GimpMetadata *metadata,
GimpMetadataSaveFlags flags,
GFile *file,
GError **error)
{
GimpMetadata *new_metadata;
gboolean success = FALSE;
g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
g_return_val_if_fail (mime_type != NULL, FALSE);
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);
if (! (flags & (GIMP_METADATA_SAVE_EXIF |
GIMP_METADATA_SAVE_XMP |
GIMP_METADATA_SAVE_IPTC |
GIMP_METADATA_SAVE_THUMBNAIL)))
return TRUE;
new_metadata = gimp_image_metadata_save_filter (image, mime_type, metadata,
flags, file, error);
if (! new_metadata)
{
return FALSE;
}
success = gimp_metadata_save_to_file (new_metadata, file, error);
g_object_unref (new_metadata);
return success;
}
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