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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 <http://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"
/* Declare local functions.
*/
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
gboolean undo_touched;
gboolean load_interactive;
gchar *image_comment;
gint32 display_ID;
JpegSaveVals jsvals;
gint32 orig_image_ID_global;
gint32 drawable_ID_global;
gint orig_quality;
JpegSubsampling orig_subsmp;
gint num_quant_tables;
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
MAIN ()
static void
query (void)
{
static const GimpParamDef load_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_STRING, "filename", "The name of the file to load" },
{ GIMP_PDB_STRING, "raw-filename", "The name of the file to load" }
};
static const GimpParamDef load_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Output image" }
};
static const GimpParamDef thumb_args[] =
{
{ GIMP_PDB_STRING, "filename", "The name of the file to load" },
{ GIMP_PDB_INT32, "thumb-size", "Preferred thumbnail size" }
};
static const GimpParamDef thumb_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Thumbnail image" },
{ GIMP_PDB_INT32, "image-width", "Width of full-sized image" },
{ GIMP_PDB_INT32, "image-height", "Height of full-sized image" }
};
static const GimpParamDef save_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Drawable to save" },
{ GIMP_PDB_STRING, "filename", "The name of the file to save the image in" },
{ GIMP_PDB_STRING, "raw-filename", "The name of the file to save the image in" },
{ GIMP_PDB_FLOAT, "quality", "Quality of saved image (0 <= quality <= 1)" },
{ GIMP_PDB_FLOAT, "smoothing", "Smoothing factor for saved image (0 <= smoothing <= 1)" },
{ GIMP_PDB_INT32, "optimize", "Optimization of entropy encoding parameters (0/1)" },
{ GIMP_PDB_INT32, "progressive", "Enable progressive jpeg image loading (0/1)" },
{ GIMP_PDB_STRING, "comment", "Image comment" },
{ GIMP_PDB_INT32, "subsmp", "The subsampling option number" },
{ GIMP_PDB_INT32, "baseline", "Force creation of a baseline JPEG (non-baseline JPEGs can't be read by all decoders) (0/1)" },
{ GIMP_PDB_INT32, "restart", "Interval of restart markers (in MCU rows, 0 = no restart markers)" },
{ GIMP_PDB_INT32, "dct", "DCT algorithm to use (speed/quality tradeoff)" }
};
gimp_install_procedure (LOAD_PROC,
"loads files in the JPEG file format",
"loads files in the JPEG file format",
"Spencer Kimball, Peter Mattis & others",
"Spencer Kimball & Peter Mattis",
"1995-2007",
N_("JPEG image"),
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (load_args),
G_N_ELEMENTS (load_return_vals),
load_args, load_return_vals);
gimp_register_file_handler_mime (LOAD_PROC, "image/jpeg");
gimp_register_magic_load_handler (LOAD_PROC,
"jpg,jpeg,jpe",
"",
"6,string,JFIF,6,string,Exif");
gimp_install_procedure (LOAD_THUMB_PROC,
"Loads a thumbnail from a JPEG image",
"Loads a thumbnail from a JPEG image (only if it exists)",
"Mukund Sivaraman <muks@mukund.org>, Sven Neumann <sven@gimp.org>",
"Mukund Sivaraman <muks@mukund.org>, Sven Neumann <sven@gimp.org>",
"November 15, 2004",
NULL,
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (thumb_args),
G_N_ELEMENTS (thumb_return_vals),
thumb_args, thumb_return_vals);
gimp_register_thumbnail_loader (LOAD_PROC, LOAD_THUMB_PROC);
gimp_install_procedure (SAVE_PROC,
"saves files in the JPEG file format",
"saves files in the lossy, widely supported JPEG format",
"Spencer Kimball, Peter Mattis & others",
"Spencer Kimball & Peter Mattis",
"1995-2007",
N_("JPEG image"),
"RGB*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_register_file_handler_mime (SAVE_PROC, "image/jpeg");
gimp_register_save_handler (SAVE_PROC, "jpg,jpeg,jpe", "");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[6];
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
gint32 image_ID;
gint32 drawable_ID;
gint32 orig_image_ID;
GimpParasite *parasite;
GimpExportReturn export = GIMP_EXPORT_CANCEL;
GError *error = NULL;
run_mode = param[0].data.d_int32;
INIT_I18N ();
gegl_init (NULL, NULL);
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
preview_image_ID = -1;
preview_layer_ID = -1;
orig_quality = 0;
orig_subsmp = JPEG_SUBSAMPLING_2x2_1x1_1x1;
num_quant_tables = 0;
if (strcmp (name, LOAD_PROC) == 0)
{
gboolean resolution_loaded = FALSE;
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
case GIMP_RUN_WITH_LAST_VALS:
gimp_ui_init (PLUG_IN_BINARY, FALSE);
load_interactive = TRUE;
break;
default:
load_interactive = FALSE;
break;
}
image_ID = load_image (param[1].data.d_string, run_mode, FALSE,
&resolution_loaded, &error);
if (image_ID != -1)
{
GFile *file = g_file_new_for_path (param[1].data.d_string);
GimpMetadata *metadata;
metadata = gimp_image_metadata_load_prepare (image_ID, "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_ID, "image/jpeg",
metadata, flags,
load_interactive);
g_object_unref (metadata);
}
g_object_unref (file);
*nreturn_vals = 2;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image_ID;
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
else if (strcmp (name, LOAD_THUMB_PROC) == 0)
{
if (nparams < 2)
{
status = GIMP_PDB_CALLING_ERROR;
}
else
{
GFile *file = g_file_new_for_path (param[0].data.d_string);
gint width = 0;
gint height = 0;
GimpImageType type = -1;
image_ID = load_thumbnail_image (file, &width, &height, &type,
&error);
g_object_unref (file);
if (image_ID != -1)
{
*nreturn_vals = 6;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image_ID;
values[2].type = GIMP_PDB_INT32;
values[2].data.d_int32 = width;
values[3].type = GIMP_PDB_INT32;
values[3].data.d_int32 = height;
values[4].type = GIMP_PDB_INT32;
values[4].data.d_int32 = type;
values[5].type = GIMP_PDB_INT32;
values[5].data.d_int32 = 1; /* num_layers */
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
}
else if (strcmp (name, SAVE_PROC) == 0)
{
image_ID = orig_image_ID = param[1].data.d_int32;
drawable_ID = param[2].data.d_int32;
/* eventually export the image */
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
case GIMP_RUN_WITH_LAST_VALS:
gimp_ui_init (PLUG_IN_BINARY, FALSE);
export = gimp_export_image (&image_ID, &drawable_ID, "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)
{
gimp_image_set_filename (image_ID, tmp);
g_free (tmp);
}
display_ID = -1;
}
break;
case GIMP_EXPORT_IGNORE:
break;
case GIMP_EXPORT_CANCEL:
values[0].data.d_status = GIMP_PDB_CANCEL;
return;
break;
}
break;
default:
break;
}
g_free (image_comment);
image_comment = NULL;
parasite = gimp_image_get_parasite (orig_image_ID, "gimp-comment");
if (parasite)
{
image_comment = g_strndup (gimp_parasite_data (parasite),
gimp_parasite_data_size (parasite));
gimp_parasite_free (parasite);
}
/* load defaults from gimp parasite */
load_defaults ();
switch (run_mode)
{
case GIMP_RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
/* pw - added two more progressive and comment */
/* sg - added subsampling, preview, baseline, restarts and DCT */
if (nparams != 14)
{
status = GIMP_PDB_CALLING_ERROR;
}
else
{
/* Once the PDB gets default parameters, remove this hack */
if (param[5].data.d_float >= 0.01)
{
jsvals.quality = 100.0 * param[5].data.d_float;
jsvals.smoothing = param[6].data.d_float;
jsvals.optimize = param[7].data.d_int32;
jsvals.progressive = param[8].data.d_int32;
jsvals.baseline = param[11].data.d_int32;
jsvals.subsmp = param[10].data.d_int32;
jsvals.restart = param[12].data.d_int32;
jsvals.dct = param[13].data.d_int32;
/* free up the default -- wasted some effort earlier */
g_free (image_comment);
image_comment = g_strdup (param[9].data.d_string);
}
jsvals.preview = FALSE;
if (jsvals.quality < 0.0 || jsvals.quality > 100.0)
status = GIMP_PDB_CALLING_ERROR;
else if (jsvals.smoothing < 0.0 || jsvals.smoothing > 1.0)
status = GIMP_PDB_CALLING_ERROR;
else if (jsvals.subsmp < 0 || jsvals.subsmp > 3)
status = GIMP_PDB_CALLING_ERROR;
else if (jsvals.dct < 0 || jsvals.dct > 2)
status = GIMP_PDB_CALLING_ERROR;
}
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_ID,
&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_ID,
"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;
jsvals.use_orig_quality = TRUE;
}
if (orig_subsmp == JPEG_SUBSAMPLING_1x1_1x1_1x1 ||
((gint) orig_subsmp > 0 &&
jsvals.subsmp == JPEG_SUBSAMPLING_1x1_1x1_1x1))
{
jsvals.subsmp = orig_subsmp;
}
}
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_ID);
undo_touched = TRUE;
}
/* prepare for the preview */
preview_image_ID = image_ID;
orig_image_ID_global = orig_image_ID;
drawable_ID_global = drawable_ID;
/* First acquire information with a dialog */
status = (save_dialog () ? GIMP_PDB_SUCCESS : 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_ID);
gimp_displays_flush ();
}
}
if (status == GIMP_PDB_SUCCESS)
{
if (! save_image (param[3].data.d_string,
image_ID, drawable_ID, orig_image_ID, 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_ID != -1)
gimp_display_delete (display_ID);
else
gimp_image_delete (image_ID);
}
if (status == GIMP_PDB_SUCCESS)
{
GimpMetadata *metadata;
/* 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_ID, "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_ID, parasite);
gimp_parasite_free (parasite);
}
parasite = gimp_parasite_new ("jpeg-save-options",
0, sizeof (jsvals), &jsvals);
gimp_image_attach_parasite (orig_image_ID, parasite);
gimp_parasite_free (parasite);
/* write metadata */
metadata = gimp_image_metadata_save_prepare (orig_image_ID,
"image/jpeg");
if (metadata)
{
GFile *file;
GimpMetadataSaveFlags flags = GIMP_METADATA_SAVE_ALL;
gimp_metadata_set_bits_per_sample (metadata, 8);
if (! jsvals.save_exif) flags &= ~GIMP_METADATA_SAVE_EXIF;
if (! jsvals.save_xmp) flags &= ~GIMP_METADATA_SAVE_XMP;
if (! jsvals.save_iptc) flags &= ~GIMP_METADATA_SAVE_IPTC;
if (! jsvals.save_thumbnail) flags &= ~GIMP_METADATA_SAVE_THUMBNAIL;
file = g_file_new_for_path (param[3].data.d_string);
gimp_image_metadata_save_finish (orig_image_ID,
"image/jpeg",
metadata, flags, file,
NULL);
g_object_unref (file);
g_object_unref (metadata);
}
}
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
if (status != GIMP_PDB_SUCCESS && error)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_STRING;
values[1].data.d_string = error->message;
}
values[0].data.d_status = status;
}
/*
* 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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