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gimp/plug-ins/file-jpeg/jpeg.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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdio.h>
#include <setjmp.h>
#include <string.h>
#include <jpeglib.h>
#include <jerror.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#include "jpeg.h"
#include "jpeg-settings.h"
#include "jpeg-load.h"
#include "jpeg-save.h"
typedef struct _Jpeg Jpeg;
typedef struct _JpegClass JpegClass;
struct _Jpeg
{
GimpPlugIn parent_instance;
};
struct _JpegClass
{
GimpPlugInClass parent_class;
};
#define JPEG_TYPE (jpeg_get_type ())
#define JPEG (obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), JPEG_TYPE, Jpeg))
GType jpeg_get_type (void) G_GNUC_CONST;
static GList * jpeg_query_procedures (GimpPlugIn *plug_in);
static GimpProcedure * jpeg_create_procedure (GimpPlugIn *plug_in,
const gchar *name);
static GimpValueArray * jpeg_load (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
const GimpValueArray *args,
gpointer run_data);
static GimpValueArray * jpeg_load_thumb (GimpProcedure *procedure,
GFile *file,
gint size,
const GimpValueArray *args,
gpointer run_data);
static GimpValueArray * jpeg_save (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
gint n_drawables,
GimpDrawable **drawables,
GFile *file,
const GimpValueArray *args,
gpointer run_data);
G_DEFINE_TYPE (Jpeg, jpeg, GIMP_TYPE_PLUG_IN)
GIMP_MAIN (JPEG_TYPE)
gboolean undo_touched = FALSE;
gchar *image_comment = NULL;
GimpDisplay *display = NULL;
JpegSaveVals jsvals = { 0, };
GimpImage *orig_image_global = NULL;
GimpDrawable *drawable_global = NULL;
gint orig_quality = 0;
JpegSubsampling orig_subsmp = JPEG_SUBSAMPLING_2x2_1x1_1x1;;
gint num_quant_tables = 0;
static void
jpeg_class_init (JpegClass *klass)
{
GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = jpeg_query_procedures;
plug_in_class->create_procedure = jpeg_create_procedure;
}
static void
jpeg_init (Jpeg *jpeg)
{
}
static GList *
jpeg_query_procedures (GimpPlugIn *plug_in)
{
GList *list = NULL;
list = g_list_append (list, g_strdup (LOAD_THUMB_PROC));
list = g_list_append (list, g_strdup (LOAD_PROC));
list = g_list_append (list, g_strdup (SAVE_PROC));
return list;
}
static GimpProcedure *
jpeg_create_procedure (GimpPlugIn *plug_in,
const gchar *name)
{
GimpProcedure *procedure = NULL;
if (! strcmp (name, LOAD_PROC))
{
procedure = gimp_load_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
jpeg_load, NULL, NULL);
gimp_procedure_set_menu_label (procedure, N_("JPEG image"));
gimp_procedure_set_documentation (procedure,
"Loads files in the JPEG file format",
"Loads files in the JPEG file format",
name);
gimp_procedure_set_attribution (procedure,
"Spencer Kimball, Peter Mattis & others",
"Spencer Kimball & Peter Mattis",
"1995-2007");
gimp_file_procedure_set_mime_types (GIMP_FILE_PROCEDURE (procedure),
"image/jpeg");
gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
"jpg,jpeg,jpe");
gimp_file_procedure_set_magics (GIMP_FILE_PROCEDURE (procedure),
"0,string,\xff\xd8\xff");
gimp_load_procedure_set_thumbnail_loader (GIMP_LOAD_PROCEDURE (procedure),
LOAD_THUMB_PROC);
}
else if (! strcmp (name, LOAD_THUMB_PROC))
{
procedure = gimp_thumbnail_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
jpeg_load_thumb, NULL, NULL);
gimp_procedure_set_documentation (procedure,
"Loads a thumbnail from a JPEG image",
"Loads a thumbnail from a JPEG image, "
"if one exists",
name);
gimp_procedure_set_attribution (procedure,
"Mukund Sivaraman <muks@mukund.org>, "
"Sven Neumann <sven@gimp.org>",
"Mukund Sivaraman <muks@mukund.org>, "
"Sven Neumann <sven@gimp.org>",
"November 15, 2004");
}
else if (! strcmp (name, SAVE_PROC))
{
procedure = gimp_save_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
jpeg_save, NULL, NULL);
gimp_procedure_set_image_types (procedure, "RGB*, GRAY*");
gimp_procedure_set_menu_label (procedure, N_("JPEG image"));
gimp_procedure_set_documentation (procedure,
"Saves files in the JPEG file format",
"Saves files in the lossy, widely "
"supported JPEG format",
name);
gimp_procedure_set_attribution (procedure,
"Spencer Kimball, Peter Mattis & others",
"Spencer Kimball & Peter Mattis",
"1995-2007");
gimp_file_procedure_set_mime_types (GIMP_FILE_PROCEDURE (procedure),
"image/jpeg");
gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
"jpg,jpeg,jpe");
/* See bugs #63610 and #61088 for a discussion about the quality
* settings
*/
GIMP_PROC_ARG_DOUBLE (procedure, "quality",
"Quality",
"Quality of saved image",
0.0, 1.0, 0.9,
G_PARAM_READWRITE);
GIMP_PROC_ARG_DOUBLE (procedure, "smoothing",
"Smoothing",
"Smoothing factor for saved image",
0.0, 1.0, 0.0,
G_PARAM_READWRITE);
GIMP_PROC_ARG_BOOLEAN (procedure, "optimize",
"Optimize",
"Use optimized tables during Huffman coding",
TRUE,
G_PARAM_READWRITE);
GIMP_PROC_ARG_BOOLEAN (procedure, "progressive",
"Progressive",
"Create progressive JPEG images",
TRUE,
G_PARAM_READWRITE);
GIMP_PROC_ARG_STRING (procedure, "comment",
"Comment",
"Image comment",
gimp_get_default_comment (),
G_PARAM_READWRITE);
GIMP_PROC_ARG_INT (procedure, "sub-sampling",
"Sub-sampling",
"Sub-sampling type { 0 == 4:2:0 (chroma quartered), "
"1 == 4:2:2 Horizontal (chroma halved), "
"2 == 4:4:4 (best quality), "
"3 == 4:2:2 Vertical (chroma halved)",
JPEG_SUBSAMPLING_2x2_1x1_1x1,
JPEG_SUBSAMPLING_1x2_1x1_1x1,
JPEG_SUBSAMPLING_1x1_1x1_1x1,
G_PARAM_READWRITE);
GIMP_PROC_ARG_BOOLEAN (procedure, "baseline",
"Baseline",
"Force creation of a baseline JPEG "
"(non-baseline JPEGs can't be read by all decoders)",
TRUE,
G_PARAM_READWRITE);
GIMP_PROC_ARG_INT (procedure, "restart",
"Restart",
"Interval of restart markers "
"(in MCU rows, 0 = no restart markers)",
0, 64, 0,
G_PARAM_READWRITE);
GIMP_PROC_ARG_INT (procedure, "dct",
"DCT",
"DCT method to use { INTEGER (0), FIXED (1), "
"FLOAT (2) }",
0, 2, 0,
G_PARAM_READWRITE);
}
return procedure;
}
static GimpValueArray *
jpeg_load (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
const GimpValueArray *args,
gpointer run_data)
{
GimpValueArray *return_vals;
GimpImage *image;
gboolean resolution_loaded = FALSE;
GError *error = NULL;
INIT_I18N ();
gegl_init (NULL, NULL);
preview_image = NULL;
preview_layer = NULL;
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
case GIMP_RUN_WITH_LAST_VALS:
gimp_ui_init (PLUG_IN_BINARY);
break;
default:
break;
}
image = load_image (file, run_mode, FALSE,
&resolution_loaded, &error);
if (image)
{
GimpMetadata *metadata;
metadata = gimp_image_metadata_load_prepare (image, "image/jpeg",
file, NULL);
if (metadata)
{
GimpMetadataLoadFlags flags = GIMP_METADATA_LOAD_ALL;
if (resolution_loaded)
flags &= ~GIMP_METADATA_LOAD_RESOLUTION;
gimp_image_metadata_load_finish (image, "image/jpeg",
metadata, flags);
g_object_unref (metadata);
}
}
if (! image)
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
error);
return_vals = gimp_procedure_new_return_values (procedure,
GIMP_PDB_SUCCESS,
NULL);
GIMP_VALUES_SET_IMAGE (return_vals, 1, image);
return return_vals;
}
static GimpValueArray *
jpeg_load_thumb (GimpProcedure *procedure,
GFile *file,
gint size,
const GimpValueArray *args,
gpointer run_data)
{
GimpValueArray *return_vals;
GimpImage *image;
gint width = 0;
gint height = 0;
GimpImageType type = -1;
GError *error = NULL;
INIT_I18N ();
gegl_init (NULL, NULL);
preview_image = NULL;
preview_layer = NULL;
image = load_thumbnail_image (file, &width, &height, &type,
&error);
if (! image)
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
error);
return_vals = gimp_procedure_new_return_values (procedure,
GIMP_PDB_SUCCESS,
NULL);
GIMP_VALUES_SET_IMAGE (return_vals, 1, image);
GIMP_VALUES_SET_INT (return_vals, 2, width);
GIMP_VALUES_SET_INT (return_vals, 3, height);
GIMP_VALUES_SET_ENUM (return_vals, 4, type);
GIMP_VALUES_SET_INT (return_vals, 5, 1); /* 1 layer */
return return_vals;
}
static GimpValueArray *
jpeg_save (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
gint n_drawables,
GimpDrawable **drawables,
GFile *file,
const GimpValueArray *args,
gpointer run_data)
{
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpParasite *parasite;
GimpMetadata *metadata;
GimpMetadataSaveFlags metadata_flags;
GimpImage *orig_image;
GimpExportReturn export = GIMP_EXPORT_CANCEL;
GError *error = NULL;
INIT_I18N ();
gegl_init (NULL, NULL);
preview_image = NULL;
preview_layer = NULL;
orig_image = image;
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
case GIMP_RUN_WITH_LAST_VALS:
gimp_ui_init (PLUG_IN_BINARY);
export = gimp_export_image (&image, &n_drawables, &drawables, "JPEG",
GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_GRAY);
switch (export)
{
case GIMP_EXPORT_EXPORT:
{
gchar *tmp = g_filename_from_utf8 (_("Export Preview"), -1,
NULL, NULL, NULL);
if (tmp)
{
GFile *file = g_file_new_for_path (tmp);
gimp_image_set_file (image, file);
g_object_unref (file);
g_free (tmp);
}
display = NULL;
}
break;
case GIMP_EXPORT_IGNORE:
break;
case GIMP_EXPORT_CANCEL:
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_CANCEL,
NULL);
break;
}
break;
default:
break;
}
if (n_drawables != 1)
{
g_set_error (&error, G_FILE_ERROR, 0,
_("JPEG format does not support multiple layers."));
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_CALLING_ERROR,
error);
}
/* Initialize with hardcoded defaults */
load_defaults ();
/* Override the defaults with preferences. */
metadata = gimp_image_metadata_save_prepare (orig_image,
"image/jpeg",
&metadata_flags);
jsvals.save_exif = (metadata_flags & GIMP_METADATA_SAVE_EXIF) != 0;
jsvals.save_xmp = (metadata_flags & GIMP_METADATA_SAVE_XMP) != 0;
jsvals.save_iptc = (metadata_flags & GIMP_METADATA_SAVE_IPTC) != 0;
jsvals.save_thumbnail = (metadata_flags & GIMP_METADATA_SAVE_THUMBNAIL) != 0;
jsvals.save_profile = (metadata_flags & GIMP_METADATA_SAVE_COLOR_PROFILE) != 0;
parasite = gimp_image_get_parasite (orig_image, "gimp-comment");
if (parasite)
{
image_comment = g_strndup (gimp_parasite_data (parasite),
gimp_parasite_data_size (parasite));
gimp_parasite_free (parasite);
}
/* Override preferences from JPG export defaults (if saved). */
load_parasite ();
switch (run_mode)
{
case GIMP_RUN_NONINTERACTIVE:
g_free (image_comment);
jsvals.quality = GIMP_VALUES_GET_DOUBLE (args, 0) * 100.0;
jsvals.smoothing = GIMP_VALUES_GET_DOUBLE (args, 1);
jsvals.optimize = GIMP_VALUES_GET_BOOLEAN (args, 2);
jsvals.progressive = GIMP_VALUES_GET_BOOLEAN (args, 3);
image_comment = GIMP_VALUES_DUP_STRING (args, 4);
jsvals.subsmp = GIMP_VALUES_GET_DOUBLE (args, 5);
jsvals.baseline = GIMP_VALUES_GET_DOUBLE (args, 6);
jsvals.restart = GIMP_VALUES_GET_DOUBLE (args, 7);
jsvals.dct = GIMP_VALUES_GET_DOUBLE (args, 8);
jsvals.preview = FALSE;
break;
case GIMP_RUN_INTERACTIVE:
case GIMP_RUN_WITH_LAST_VALS:
/* restore the values found when loading the file (if available) */
jpeg_restore_original_settings (orig_image,
&orig_quality,
&orig_subsmp,
&num_quant_tables);
/* load up the previously used values (if file was saved once) */
parasite = gimp_image_get_parasite (orig_image,
"jpeg-save-options");
if (parasite)
{
const JpegSaveVals *save_vals = gimp_parasite_data (parasite);
jsvals.quality = save_vals->quality;
jsvals.smoothing = save_vals->smoothing;
jsvals.optimize = save_vals->optimize;
jsvals.progressive = save_vals->progressive;
jsvals.baseline = save_vals->baseline;
jsvals.subsmp = save_vals->subsmp;
jsvals.restart = save_vals->restart;
jsvals.dct = save_vals->dct;
jsvals.preview = save_vals->preview;
jsvals.save_exif = save_vals->save_exif;
jsvals.save_thumbnail = save_vals->save_thumbnail;
jsvals.save_xmp = save_vals->save_xmp;
jsvals.save_iptc = save_vals->save_iptc;
jsvals.use_orig_quality = save_vals->use_orig_quality;
gimp_parasite_free (parasite);
}
else
{
/* We are called with GIMP_RUN_WITH_LAST_VALS but this image
* doesn't have a "jpeg-save-options" parasite. It's better
* to prompt the user with a dialog now so that she has
* control over the JPEG encoding parameters.
*/
run_mode = GIMP_RUN_INTERACTIVE;
/* If this image was loaded from a JPEG file and has not
* been saved yet, try to use some of the settings from the
* original file if they are better than the default values.
*/
if (orig_quality > jsvals.quality)
{
jsvals.quality = orig_quality;
}
/* Skip changing subsampling to original if we already have
* best setting or if original have worst setting
*/
if (!(jsvals.subsmp == JPEG_SUBSAMPLING_1x1_1x1_1x1 ||
orig_subsmp == JPEG_SUBSAMPLING_2x2_1x1_1x1))
{
jsvals.subsmp = orig_subsmp;
}
if (orig_quality == jsvals.quality &&
orig_subsmp == jsvals.subsmp)
{
jsvals.use_orig_quality = TRUE;
}
}
break;
}
if (run_mode == GIMP_RUN_INTERACTIVE)
{
if (jsvals.preview)
{
/* we freeze undo saving so that we can avoid sucking up
* tile cache with our unneeded preview steps. */
gimp_image_undo_freeze (image);
undo_touched = TRUE;
}
/* prepare for the preview */
preview_image = image;
orig_image_global = orig_image;
drawable_global = drawables[0];
/* First acquire information with a dialog */
if (! save_dialog (drawables[0]))
{
status = GIMP_PDB_CANCEL;
}
if (undo_touched)
{
/* thaw undo saving and flush the displays to have them
* reflect the current shortcuts
*/
gimp_image_undo_thaw (image);
gimp_displays_flush ();
}
}
if (status == GIMP_PDB_SUCCESS)
{
if (! save_image (file, image, drawables[0], orig_image, FALSE,
&error))
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
if (export == GIMP_EXPORT_EXPORT)
{
/* If the image was exported, delete the new display. This also
* deletes the image.
*/
if (display)
gimp_display_delete (display);
else
gimp_image_delete (image);
g_free (drawables);
}
if (status == GIMP_PDB_SUCCESS)
{
/* pw - now we need to change the defaults to be whatever was
* used to save this image. Dump the old parasites and add new
* ones.
*/
gimp_image_detach_parasite (orig_image, "gimp-comment");
if (image_comment && strlen (image_comment))
{
parasite = gimp_parasite_new ("gimp-comment",
GIMP_PARASITE_PERSISTENT,
strlen (image_comment) + 1,
image_comment);
gimp_image_attach_parasite (orig_image, parasite);
gimp_parasite_free (parasite);
}
parasite = gimp_parasite_new ("jpeg-save-options",
0, sizeof (jsvals), &jsvals);
gimp_image_attach_parasite (orig_image, parasite);
gimp_parasite_free (parasite);
/* write metadata */
if (metadata)
{
gimp_metadata_set_bits_per_sample (metadata, 8);
if (jsvals.save_exif)
metadata_flags |= GIMP_METADATA_SAVE_EXIF;
else
metadata_flags &= ~GIMP_METADATA_SAVE_EXIF;
if (jsvals.save_xmp)
metadata_flags |= GIMP_METADATA_SAVE_XMP;
else
metadata_flags &= ~GIMP_METADATA_SAVE_XMP;
if (jsvals.save_iptc)
metadata_flags |= GIMP_METADATA_SAVE_IPTC;
else
metadata_flags &= ~GIMP_METADATA_SAVE_IPTC;
if (jsvals.save_thumbnail)
metadata_flags |= GIMP_METADATA_SAVE_THUMBNAIL;
else
metadata_flags &= ~GIMP_METADATA_SAVE_THUMBNAIL;
if (jsvals.save_profile)
metadata_flags |= GIMP_METADATA_SAVE_COLOR_PROFILE;
else
metadata_flags &= ~GIMP_METADATA_SAVE_COLOR_PROFILE;
if (! gimp_image_metadata_save_finish (orig_image,
"image/jpeg",
metadata, metadata_flags,
file, &error))
{
if (error)
{
/* Even though a failure to write metadata is not enough
reason to say we failed to save the image, we should
still notify the user about the problem. */
g_message ("%s: saving metadata failed: %s",
G_STRFUNC, error->message);
g_error_free (error);
}
}
}
}
if (metadata)
g_object_unref (metadata);
return gimp_procedure_new_return_values (procedure, status, error);
}
/*
* Here's the routine that will replace the standard error_exit method:
*/
void
my_error_exit (j_common_ptr cinfo)
{
/* cinfo->err really points to a my_error_mgr struct, so coerce pointer */
my_error_ptr myerr = (my_error_ptr) cinfo->err;
/* Always display the message. */
/* We could postpone this until after returning, if we chose. */
(*cinfo->err->output_message) (cinfo);
/* Return control to the setjmp point */
longjmp (myerr->setjmp_buffer, 1);
}
void
my_output_message (j_common_ptr cinfo)
{
gchar buffer[JMSG_LENGTH_MAX + 1];
(*cinfo->err->format_message)(cinfo, buffer);
g_message ("%s", buffer);
}
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