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gimp/plug-ins/file-jpeg/jpeg-exif.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* EXIF-handling code for the jpeg plugin. May eventually be better
* to move this stuff into libgimpbase or a new libgimpmetadata and
* make it available for other plugins.
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <setjmp.h>
#include <jpeglib.h>
#include <jerror.h>
#include <libexif/exif-content.h>
#include <libexif/exif-data.h>
#include <libexif/exif-utils.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "jpeg-exif.h"
#include "gimpexif.h"
#include "jpeg.h"
#include "jpeg-settings.h"
#include "libgimp/stdplugins-intl.h"
#define THUMBNAIL_SIZE 128
#define JPEG_EXIF_ROTATE_PARASITE "exif-orientation-rotate"
static gboolean jpeg_exif_rotate_query_dialog (gint32 image_ID);
/* Replacement for exif_data_new_from_file() to work around
* filename encoding problems (see bug #335391).
*/
ExifData *
jpeg_exif_data_new_from_file (const gchar *filename,
GError **error)
{
ExifData *data;
GMappedFile *file;
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
file = g_mapped_file_new (filename, FALSE, error);
if (! file)
return NULL;
data = exif_data_new_from_data ((guchar *) g_mapped_file_get_contents (file),
g_mapped_file_get_length (file));
g_mapped_file_unref (file);
return data;
}
gint
jpeg_exif_get_orientation (ExifData *exif_data)
{
ExifEntry *entry;
gint byte_order = exif_data_get_byte_order (exif_data);
/* get orientation and rotate image accordingly if necessary */
if ((entry = exif_content_get_entry (exif_data->ifd[EXIF_IFD_0],
EXIF_TAG_ORIENTATION)))
{
return exif_get_short (entry->data, byte_order);
}
return 0;
}
gboolean
jpeg_exif_get_resolution (ExifData *exif_data,
gdouble *xresolution,
gdouble *yresolution,
gint *unit)
{
gboolean success;
ExifEntry *entry;
gint byte_order;
gdouble xres;
gdouble yres;
gint ruint;
ExifRational r;
success = FALSE;
byte_order = exif_data_get_byte_order (exif_data);
do
{
entry = exif_content_get_entry (exif_data->ifd[EXIF_IFD_0],
EXIF_TAG_X_RESOLUTION);
if (!entry)
break;
r = exif_get_rational (entry->data, byte_order);
if (r.denominator == 0.0)
break;
xres = r.numerator / r.denominator;
entry = exif_content_get_entry (exif_data->ifd[EXIF_IFD_0],
EXIF_TAG_Y_RESOLUTION);
if (!entry)
break;
r = exif_get_rational (entry->data, byte_order);
if (r.denominator == 0.0)
break;
yres = r.numerator / r.denominator;
entry = exif_content_get_entry (exif_data->ifd[EXIF_IFD_0],
EXIF_TAG_RESOLUTION_UNIT);
if (!entry)
break;
ruint = exif_get_short (entry->data, byte_order);
if ((ruint != 2) && /* inches */
(ruint != 3)) /* centimetres */
break;
success = TRUE;
}
while (0);
if (success)
{
*xresolution = xres;
*yresolution = yres;
*unit = ruint;
}
return success;
}
void
jpeg_setup_exif_for_save (ExifData *exif_data,
const gint32 image_ID)
{
ExifRational r;
gdouble xres, yres;
ExifEntry *entry;
gint byte_order = exif_data_get_byte_order (exif_data);
/* set orientation to top - left */
if ((entry = exif_content_get_entry (exif_data->ifd[EXIF_IFD_0],
EXIF_TAG_ORIENTATION)))
{
exif_set_short (entry->data, byte_order, (ExifShort) 1);
}
/* set x and y resolution */
gimp_image_get_resolution (image_ID, &xres, &yres);
r.numerator = xres;
r.denominator = 1;
if ((entry = exif_content_get_entry (exif_data->ifd[EXIF_IFD_0],
EXIF_TAG_X_RESOLUTION)))
{
exif_set_rational (entry->data, byte_order, r);
}
r.numerator = yres;
if ((entry = exif_content_get_entry (exif_data->ifd[EXIF_IFD_0],
EXIF_TAG_Y_RESOLUTION)))
{
exif_set_rational (entry->data, byte_order, r);
}
/* set resolution unit, always inches */
if ((entry = exif_content_get_entry (exif_data->ifd[EXIF_IFD_0],
EXIF_TAG_RESOLUTION_UNIT)))
{
exif_set_short (entry->data, byte_order, (ExifShort) 2);
}
/* set software to "GIMP" and include the version number */
if ((entry = exif_content_get_entry (exif_data->ifd[EXIF_IFD_0],
EXIF_TAG_SOFTWARE)))
{
const gchar *name = "GIMP " GIMP_VERSION;
entry->data = (guchar *) g_strdup (name);
entry->size = strlen (name) + 1;
entry->components = entry->size;
}
/* set the width and height */
if ((entry = exif_content_get_entry (exif_data->ifd[EXIF_IFD_EXIF],
EXIF_TAG_PIXEL_X_DIMENSION)))
{
exif_set_long (entry->data, byte_order,
(ExifLong) gimp_image_width (image_ID));
}
if ((entry = exif_content_get_entry (exif_data->ifd[EXIF_IFD_EXIF],
EXIF_TAG_PIXEL_Y_DIMENSION)))
{
exif_set_long (entry->data, byte_order,
(ExifLong) gimp_image_height (image_ID));
}
/*
* set the date & time image was saved
* note, date & time of original photo is stored elsewwhere, we
* aren't losing it.
*/
if ((entry = exif_content_get_entry (exif_data->ifd[EXIF_IFD_0],
EXIF_TAG_DATE_TIME)))
{
/* small memory leak here */
entry->data = NULL;
exif_entry_initialize (entry, EXIF_TAG_DATE_TIME);
}
/* should set components configuration, don't know how */
/*
* remove entries that don't apply to jpeg
* (may have come from tiff or raw)
*/
gimp_exif_data_remove_entry (exif_data, EXIF_IFD_0, EXIF_TAG_COMPRESSION);
gimp_exif_data_remove_entry (exif_data, EXIF_IFD_0, EXIF_TAG_IMAGE_WIDTH);
gimp_exif_data_remove_entry (exif_data, EXIF_IFD_0, EXIF_TAG_IMAGE_LENGTH);
gimp_exif_data_remove_entry (exif_data, EXIF_IFD_0, EXIF_TAG_BITS_PER_SAMPLE);
gimp_exif_data_remove_entry (exif_data, EXIF_IFD_0, EXIF_TAG_SAMPLES_PER_PIXEL);
gimp_exif_data_remove_entry (exif_data, EXIF_IFD_0, EXIF_TAG_PHOTOMETRIC_INTERPRETATION);
gimp_exif_data_remove_entry (exif_data, EXIF_IFD_0, EXIF_TAG_STRIP_OFFSETS);
gimp_exif_data_remove_entry (exif_data, EXIF_IFD_0, EXIF_TAG_PLANAR_CONFIGURATION);
gimp_exif_data_remove_entry (exif_data, EXIF_IFD_0, EXIF_TAG_YCBCR_SUB_SAMPLING);
/* should set thumbnail attributes */
}
void
jpeg_exif_rotate (gint32 image_ID,
gint orientation)
{
switch (orientation)
{
case 1: /* standard orientation, do nothing */
break;
case 2: /* flipped right-left */
gimp_image_flip (image_ID, GIMP_ORIENTATION_HORIZONTAL);
break;
case 3: /* rotated 180 */
gimp_image_rotate (image_ID, GIMP_ROTATE_180);
break;
case 4: /* flipped top-bottom */
gimp_image_flip (image_ID, GIMP_ORIENTATION_VERTICAL);
break;
case 5: /* flipped diagonally around '\' */
gimp_image_rotate (image_ID, GIMP_ROTATE_90);
jpeg_swap_original_settings (image_ID);
gimp_image_flip (image_ID, GIMP_ORIENTATION_HORIZONTAL);
break;
case 6: /* 90 CW */
gimp_image_rotate (image_ID, GIMP_ROTATE_90);
jpeg_swap_original_settings (image_ID);
break;
case 7: /* flipped diagonally around '/' */
gimp_image_rotate (image_ID, GIMP_ROTATE_90);
jpeg_swap_original_settings (image_ID);
gimp_image_flip (image_ID, GIMP_ORIENTATION_VERTICAL);
break;
case 8: /* 90 CCW */
gimp_image_rotate (image_ID, GIMP_ROTATE_270);
jpeg_swap_original_settings (image_ID);
break;
default: /* shouldn't happen */
break;
}
}
void
jpeg_exif_rotate_query (gint32 image_ID,
gint orientation)
{
GimpParasite *parasite;
gboolean query = load_interactive;
if (orientation < 2 || orientation > 8)
return;
parasite = gimp_get_parasite (JPEG_EXIF_ROTATE_PARASITE);
if (parasite)
{
if (strncmp (gimp_parasite_data (parasite), "yes",
gimp_parasite_data_size (parasite)) == 0)
{
query = FALSE;
}
else if (strncmp (gimp_parasite_data (parasite), "no",
gimp_parasite_data_size (parasite)) == 0)
{
gimp_parasite_free (parasite);
return;
}
gimp_parasite_free (parasite);
}
if (query && ! jpeg_exif_rotate_query_dialog (image_ID))
return;
jpeg_exif_rotate (image_ID, orientation);
}
static gboolean
jpeg_exif_rotate_query_dialog (gint32 image_ID)
{
GtkWidget *dialog;
GtkWidget *hbox;
GtkWidget *vbox;
GtkWidget *label;
GtkWidget *toggle;
GdkPixbuf *pixbuf;
gint response;
dialog = gimp_dialog_new (_("Rotate Image?"), PLUG_IN_ROLE,
NULL, 0, NULL, NULL,
_("_Keep Orientation"), GTK_RESPONSE_CANCEL,
GIMP_STOCK_TOOL_ROTATE, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gtk_window_set_resizable (GTK_WINDOW (dialog), FALSE);
gimp_window_set_transient (GTK_WINDOW (dialog));
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
gtk_container_set_border_width (GTK_CONTAINER (hbox), 12);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
gtk_box_pack_start (GTK_BOX (hbox), vbox, FALSE, FALSE, 0);
gtk_widget_show (vbox);
pixbuf = gimp_image_get_thumbnail (image_ID,
THUMBNAIL_SIZE, THUMBNAIL_SIZE,
GIMP_PIXBUF_SMALL_CHECKS);
if (pixbuf)
{
GtkWidget *image;
gchar *name;
image = gtk_image_new_from_pixbuf (pixbuf);
g_object_unref (pixbuf);
gtk_box_pack_start (GTK_BOX (vbox), image, FALSE, FALSE, 0);
gtk_widget_show (image);
name = gimp_image_get_name (image_ID);
label = gtk_label_new (name);
gtk_label_set_ellipsize (GTK_LABEL (label), PANGO_ELLIPSIZE_MIDDLE);
gimp_label_set_attributes (GTK_LABEL (label),
PANGO_ATTR_STYLE, PANGO_STYLE_ITALIC,
-1);
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
g_free (name);
}
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_box_pack_start (GTK_BOX (hbox), vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
label = g_object_new (GTK_TYPE_LABEL,
"label", _("According to the EXIF data, "
"this image is rotated."),
"wrap", TRUE,
"justify", GTK_JUSTIFY_LEFT,
"xalign", 0.0,
"yalign", 0.5,
NULL);
gimp_label_set_attributes (GTK_LABEL (label),
PANGO_ATTR_SCALE, PANGO_SCALE_LARGE,
PANGO_ATTR_WEIGHT, PANGO_WEIGHT_BOLD,
-1);
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
label = g_object_new (GTK_TYPE_LABEL,
"label", _("Would you like GIMP to rotate it "
"into the standard orientation?"),
"wrap", TRUE,
"justify", GTK_JUSTIFY_LEFT,
"xalign", 0.0,
"yalign", 0.5,
NULL);
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
toggle = gtk_check_button_new_with_mnemonic (_("_Don't ask me again"));
gtk_box_pack_end (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), FALSE);
gtk_widget_show (toggle);
response = gimp_dialog_run (GIMP_DIALOG (dialog));
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (toggle)))
{
GimpParasite *parasite;
const gchar *str = (response == GTK_RESPONSE_OK) ? "yes" : "no";
parasite = gimp_parasite_new (JPEG_EXIF_ROTATE_PARASITE,
GIMP_PARASITE_PERSISTENT,
strlen (str), str);
gimp_attach_parasite (parasite);
gimp_parasite_free (parasite);
}
gtk_widget_destroy (dialog);
return (response == GTK_RESPONSE_OK);
}
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