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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)
DEFINE_STD_SET_I18N
gboolean undo_touched = FALSE;
GimpDisplay *display = NULL;
gboolean separate_display = FALSE;
GimpImage *orig_image_global = NULL;
GimpDrawable *drawable_global = NULL;
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;
plug_in_class->set_i18n = STD_SET_I18N;
}
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, _("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, _("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_format_name (GIMP_FILE_PROCEDURE (procedure),
_("JPEG"));
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 exported image",
0.0, 1.0, 0.9,
G_PARAM_READWRITE);
GIMP_PROC_ARG_DOUBLE (procedure, "smoothing",
"S_moothing",
"Smoothing factor for exported image",
0.0, 1.0, 0.0,
G_PARAM_READWRITE);
GIMP_PROC_ARG_BOOLEAN (procedure, "optimize",
"Optimi_ze",
"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_BOOLEAN (procedure, "cmyk",
"Export as CM_YK",
"Create a CMYK JPEG image using the soft-proofing color profile",
FALSE,
G_PARAM_READWRITE);
GIMP_PROC_ARG_INT (procedure, "sub-sampling",
_("Su_bsampling"),
"Sub-sampling type { 0 == 4:2:0 (chroma quartered), "
"1 == 4:2:2 (chroma halved horizontally), "
"2 == 4:4:4 (best quality), "
"3 == 4:4:0 (chroma halved vertically)",
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",
_("Inter_val (MCU rows):"),
"Interval of restart markers "
"(in MCU rows, 0 = no restart markers)",
0, 64, 0,
G_PARAM_READWRITE);
GIMP_PROC_ARG_INT (procedure, "dct",
_("_DCT method"),
"DCT method to use { INTEGER (0), FIXED (1), "
"FLOAT (2) }",
0, 2, 0,
G_PARAM_READWRITE);
/* Some auxiliary arguments mostly for interactive usage. */
GIMP_PROC_AUX_ARG_BOOLEAN (procedure, "use-original-quality",
"_Use quality settings from original image",
"If the original image was loaded from a JPEG "
"file using non-standard quality settings "
"(quantization tables), enable this option to "
"get almost the same quality and file size.",
FALSE,
G_PARAM_READWRITE);
GIMP_PROC_AUX_ARG_INT (procedure, "original-quality",
NULL, NULL,
-1, 100, -1,
G_PARAM_READWRITE);
GIMP_PROC_AUX_ARG_INT (procedure, "original-sub-sampling",
NULL, NULL,
JPEG_SUBSAMPLING_2x2_1x1_1x1,
JPEG_SUBSAMPLING_1x2_1x1_1x1,
JPEG_SUBSAMPLING_2x2_1x1_1x1,
G_PARAM_READWRITE);
GIMP_PROC_AUX_ARG_INT (procedure, "original-num-quant-tables",
NULL, NULL,
-1, 4, -1,
G_PARAM_READWRITE);
GIMP_PROC_AUX_ARG_BOOLEAN (procedure, "show-preview",
"Sho_w preview in image window",
"Creates a temporary layer with an export preview",
FALSE,
G_PARAM_READWRITE);
GIMP_PROC_AUX_ARG_BOOLEAN (procedure, "use-arithmetic-coding",
"Use _arithmetic coding",
_("Older software may have trouble opening "
"arithmetic-coded images"),
FALSE,
G_PARAM_READWRITE);
GIMP_PROC_AUX_ARG_BOOLEAN (procedure, "use-restart",
_("Use restart mar_kers"),
NULL, FALSE,
G_PARAM_READWRITE);
gimp_save_procedure_set_support_exif (GIMP_SAVE_PROCEDURE (procedure), TRUE);
gimp_save_procedure_set_support_iptc (GIMP_SAVE_PROCEDURE (procedure), TRUE);
gimp_save_procedure_set_support_xmp (GIMP_SAVE_PROCEDURE (procedure), TRUE);
gimp_save_procedure_set_support_profile (GIMP_SAVE_PROCEDURE (procedure), TRUE);
gimp_save_procedure_set_support_thumbnail (GIMP_SAVE_PROCEDURE (procedure), TRUE);
gimp_save_procedure_set_support_comment (GIMP_SAVE_PROCEDURE (procedure), TRUE);
}
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;
gboolean ps_metadata_loaded = FALSE;
GError *error = NULL;
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, &ps_metadata_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;
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;
GimpProcedureConfig *config;
GimpMetadata *metadata;
GimpImage *orig_image;
GimpExportReturn export = GIMP_EXPORT_CANCEL;
GError *error = NULL;
gint orig_num_quant_tables = -1;
gint orig_quality = -1;
JpegSubsampling orig_subsmp = JPEG_SUBSAMPLING_2x2_1x1_1x1;
gegl_init (NULL, NULL);
config = gimp_procedure_create_config (procedure);
metadata = gimp_procedure_config_begin_export (config, image, run_mode,
args, "image/jpeg");
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:
display = NULL;
separate_display = TRUE;
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);
}
/* Override preferences from JPG export defaults (if saved). */
switch (run_mode)
{
case GIMP_RUN_NONINTERACTIVE:
g_object_set (config, "show-preview", FALSE, NULL);
break;
case GIMP_RUN_INTERACTIVE:
case GIMP_RUN_WITH_LAST_VALS:
{
/* restore the values found when loading the file (if available) */
gdouble dquality;
gint quality;
gint subsmp;
jpeg_restore_original_settings (orig_image,
&orig_quality,
&orig_subsmp,
&orig_num_quant_tables);
g_object_get (config,
"quality", &dquality,
"sub-sampling", &subsmp,
NULL);
quality = (gint) (dquality * 100.0);
/* 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 > quality)
{
quality = orig_quality;
dquality = (gdouble) quality / 100.0;
g_object_set (config, "quality", dquality, NULL);
}
if (orig_quality > 0)
{
/* Skip changing subsampling to original if we already have
* best setting or if original have worst setting
*/
if (!(subsmp == JPEG_SUBSAMPLING_1x1_1x1_1x1 ||
orig_subsmp == JPEG_SUBSAMPLING_2x2_1x1_1x1))
{
subsmp = orig_subsmp;
g_object_set (config, "sub-sampling", orig_subsmp, NULL);
}
if (orig_quality == quality && orig_subsmp == subsmp)
{
g_object_set (config, "use-original-quality", TRUE, NULL);
}
}
}
break;
}
g_object_set (config,
"original-sub-sampling", orig_subsmp,
"original-quality", orig_quality,
"original-num-quant-tables", orig_num_quant_tables,
NULL);
if (run_mode == GIMP_RUN_INTERACTIVE)
{
gboolean show_preview = FALSE;
g_object_get (config, "show-preview", &show_preview, NULL);
if (show_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 (procedure, config, drawables[0], orig_image))
{
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, config,
image, drawables[0], orig_image, FALSE,
&error))
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
if (status == GIMP_PDB_SUCCESS)
{
if (metadata)
gimp_metadata_set_bits_per_sample (metadata, 8);
}
gimp_procedure_config_end_export (config, image, file, status);
g_object_unref (config);
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);
gimp_display_present (gimp_default_display ());
}
else
{
gimp_image_delete (image);
}
g_free (drawables);
}
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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