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gimp/plug-ins/jpeg/jpeg-load.c

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/* The GIMP -- an 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* JPEG loading and saving file filter for the GIMP
* -Peter Mattis
*
* This filter is heavily based upon the "example.c" file in libjpeg.
* In fact most of the loading and saving code was simply cut-and-pasted
* from that file. The filter, therefore, also uses libjpeg.
*/
/* 11-JAN-99 - Added support for JPEG comments and Progressive saves.
* -pete whiting <pwhiting@sprint.net>
*
* Comments of size up to 32k can be stored in the header of jpeg
* files. (They are not compressed.) The JPEG specs and libraries
* support the storing of multiple comments. The behavior of this
* code is to merge all comments in a loading image into a single
* comment (putting \n between each) and attach that string as a
* parasite - gimp-comment - to the image. When saving, the image is
* checked to see if it has the gimp-comment parasite - if so, that is
* used as the default comment in the save dialog. Further, the other
* jpeg parameters (quaility, smoothing, compression and progressive)
* are attached to the image as a parasite. This allows the
* parameters to remain consistent between saves. I was not able to
* figure out how to determine the quaility, smoothing or compression
* values of an image as it is being loaded, but the code is there to
* support it if anyone knows how. Progressive mode is a method of
* saving the image such that as a browser (or other app supporting
* progressive loads - gimp doesn't) loads the image it first gets a
* low res version displayed and then the image is progressively
* enhanced until you get the final version. It doesn't add any size
* to the image (actually it often results in smaller file size) - the
* only draw backs are that progressive jpegs are not supported by some
* older viewers/browsers, and some might find it annoying.
*/
/*
* 21-AUG-99 - Added support for JPEG previews, subsampling,
* non-baseline JPEGs, restart markers and DCT method choice
* - Steinar H. Gunderson <sgunderson@bigfoot.com>
*
* A small preview appears and changes according to the changes to the
* compression options. The image itself works as a much bigger preview.
* For slower machines, the save operation (not the load operation) is
* done in the background, with a standard GTK+ idle loop, which turned
* out to be the most portable way. Win32 porters shouldn't have much
* difficulty porting my changes (at least I hope so...).
*
* Subsampling is a pretty obscure feature, but I thought it might be nice
* to have it in anyway, for people to play with :-) Does anybody have
* any better suggestions than the ones I've put in the menu? (See wizard.doc
* from the libjpeg distribution for a tiny bit of information on subsampling.)
*
* A baseline JPEG is often larger and/or of worse quality than a non-baseline
* one (especially at low quality settings), but all decoders are guaranteed
* to read baseline JPEGs (I think). Not all will read a non-baseline one.
*
* Restart markers are useful if you are transmitting the image over an
* unreliable network. If a file gets corrupted, it will only be corrupted
* up to the next restart marker. Of course, if there are no restart markers,
* the rest of the image will be corrupted. Restart markers take up extra
* space. The libjpeg developers recommend a restart every 1 row for
* transmitting images over unreliable networks, such as Usenet.
*
* The DCT method is said by the libjpeg docs to _only_ influence quality vs.
* speed, and nothing else. However, I've found that there _are_ size
* differences. Fast integer, on the other hand, is faster than integer,
* which in turn is faster than FP. According to the libjpeg docs (and I
* believe it's true), FP has only a theoretical advantage in quality, and
* will be slower than the two other methods, unless you're blessed with
* very a fast FPU. (In addition, images might not be identical on
* different types of FP hardware.)
*
* ...and thus ends my additions to the JPEG plug-in. I hope. *sigh* :-)
*/
/*
* 21-AUG-99 - Bunch O' Fixes.
* - Adam D. Moss <adam@gimp.org>
*
* We now correctly create an alpha-padded layer for our preview --
* having a non-background non-alpha layer is a no-no in GIMP.
*
* I've also tweaked the GIMP undo API a little and changed the JPEG
* plugin to use gimp_image_{freeze,thaw}_undo so that it doesn't store
* up a whole load of superfluous tile data every time the preview is
* changed.
*/
/*
* 22-DEC-99 - volatiles added
* - Austin Donnelly <austin@gimp.org>
*
* When gcc complains a variable may be clobbered by a longjmp or
* vfork, it means the following: setjmp() was called by the JPEG
* library for error recovery purposes, but gcc is keeping some
* variables in registers without updating the memory locations on the
* stack consistently. If JPEG error recovery is every invoked, the
* values of these variable will be inconsistent. This is almost
* always a bug, but not one that's commonly seen unless JPEG recovery
* code is exercised frequently. The correct solution is to tell gcc
* to keep the stack version of the affected variables up to date, by
* using the "volatile" keyword. Here endeth the lesson.
*/
#include "config.h" /* configure cares about HAVE_PROGRESSIVE_JPEG */
#include <glib.h> /* We want glib.h first because of some
* pretty obscure Win32 compilation issues.
*/
#include <setjmp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <jpeglib.h>
#include <jerror.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#include <signal.h>
#define SCALE_WIDTH 125
/* if you are not compiling this from inside the gimp tree, you have to */
/* take care yourself if your JPEG library supports progressive mode */
/* #undef HAVE_PROGRESSIVE_JPEG if your library doesn't support it */
/* #define HAVE_PROGRESSIVE_JPEG if your library knows how to handle it */
#define DEFAULT_QUALITY 0.75
#define DEFAULT_SMOOTHING 0.0
#define DEFAULT_OPTIMIZE 1
#define DEFAULT_PROGRESSIVE 0
#define DEFAULT_BASELINE 1
#define DEFAULT_SUBSMP 0
#define DEFAULT_RESTART 0
#define DEFAULT_DCT 0
#define DEFAULT_PREVIEW 1
#define DEFAULT_COMMENT "Created with The GIMP"
/* sg - these should not be global... */
static gint32 volatile image_ID_global = -1;
static gint32 orig_image_ID_global;
static gint32 drawable_ID_global = -1;
static gint32 layer_ID_global = -1;
static GtkWidget *preview_size = NULL;
static GDrawable *drawable_global = NULL;
typedef struct
{
gdouble quality;
gdouble smoothing;
gint optimize;
gint progressive;
gint baseline;
gint subsmp;
gint restart;
gint dct;
gint preview;
} JpegSaveVals;
typedef struct
{
gint run;
} JpegSaveInterface;
typedef struct
{
struct jpeg_compress_struct cinfo;
gint tile_height;
FILE *outfile;
gint has_alpha;
gint rowstride;
guchar *temp;
guchar *data;
guchar *src;
GDrawable *drawable;
GPixelRgn pixel_rgn;
gchar *file_name;
gint abort_me;
} preview_persistent;
gint *abort_me = NULL;
/* Declare local functions.
*/
static void query (void);
static void run (gchar *name,
gint nparams,
GParam *param,
gint *nreturn_vals,
GParam **return_vals);
static gint32 load_image (gchar *filename,
GRunModeType runmode,
gint preview);
static gint save_image (gchar *filename,
gint32 image_ID,
gint32 drawable_ID,
gint32 orig_image_ID,
gint preview);
static void add_menu_item (GtkWidget *menu,
char *label,
guint op_no,
GtkSignalFunc callback);
static void init_gtk (void);
static gint save_dialog (void);
static void save_close_callback (GtkWidget *widget,
gpointer data);
static void save_ok_callback (GtkWidget *widget,
gpointer data);
static void save_restart_toggle_update (GtkWidget *toggle,
GtkAdjustment *adjustment);
static void save_restart_update (GtkAdjustment *adjustment,
GtkWidget *toggle);
static void make_preview (void);
static void destroy_preview (void);
static void subsmp_callback (GtkWidget *widget,
gpointer data);
static void dct_callback (GtkWidget *widget,
gpointer data);
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static JpegSaveVals jsvals =
{
DEFAULT_QUALITY,
DEFAULT_SMOOTHING,
DEFAULT_OPTIMIZE,
DEFAULT_PROGRESSIVE,
DEFAULT_BASELINE,
DEFAULT_SUBSMP,
DEFAULT_RESTART,
DEFAULT_DCT,
DEFAULT_PREVIEW
};
static JpegSaveInterface jsint =
{
FALSE /* run */
};
static gchar *image_comment = NULL;
static GtkWidget *restart_markers_scale = NULL;
static GtkWidget *restart_markers_label = NULL;
MAIN ()
static void
query (void)
{
static GParamDef load_args[] =
{
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_STRING, "filename", "The name of the file to load" },
{ PARAM_STRING, "raw_filename", "The name of the file to load" },
};
static GParamDef load_return_vals[] =
{
{ PARAM_IMAGE, "image", "Output image" },
};
static gint nload_args = sizeof (load_args) / sizeof (load_args[0]);
static gint nload_return_vals = (sizeof (load_return_vals) /
sizeof (load_return_vals[0]));
static GParamDef save_args[] =
{
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_IMAGE, "image", "Input image" },
{ PARAM_DRAWABLE, "drawable", "Drawable to save" },
{ PARAM_STRING, "filename", "The name of the file to save the image in" },
{ PARAM_STRING, "raw_filename", "The name of the file to save the image in" },
{ PARAM_FLOAT, "quality", "Quality of saved image (0 <= quality <= 1)" },
{ PARAM_FLOAT, "smoothing", "Smoothing factor for saved image (0 <= smoothing <= 1)" },
{ PARAM_INT32, "optimize", "Optimization of entropy encoding parameters (0/1)" },
{ PARAM_INT32, "progressive", "Enable progressive jpeg image loading - ignored if not compiled with HAVE_PROGRESSIVE_JPEG (0/1)" },
{ PARAM_STRING, "comment", "Image comment" },
{ PARAM_INT32, "subsmp", "The subsampling option number" },
{ PARAM_INT32, "baseline", "Force creation of a baseline JPEG (non-baseline JPEGs can't be read by all decoders) (0/1)" },
{ PARAM_INT32, "restart", "Frequency of restart markers (in rows, 0 = no restart markers)" },
{ PARAM_INT32, "dct", "DCT algorithm to use (speed/quality tradeoff)" }
};
static gint nsave_args = sizeof (save_args) / sizeof (save_args[0]);
INIT_I18N();
gimp_install_procedure ("file_jpeg_load",
"loads files in the JPEG file format",
"loads files in the JPEG file format",
"Spencer Kimball, Peter Mattis & others",
"Spencer Kimball & Peter Mattis",
"1995-1999",
"<Load>/Jpeg",
NULL,
PROC_PLUG_IN,
nload_args, nload_return_vals,
load_args, load_return_vals);
gimp_install_procedure ("file_jpeg_save",
"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",
"1995-1999",
"<Save>/Jpeg",
"RGB*, GRAY*",
PROC_PLUG_IN,
nsave_args, 0,
save_args, NULL);
gimp_register_magic_load_handler ("file_jpeg_load",
"jpg,jpeg",
"",
"6,string,JFIF,6,string,Exif");
gimp_register_save_handler ("file_jpeg_save",
"jpg,jpeg",
"");
}
static void
run (gchar *name,
gint nparams,
GParam *param,
gint *nreturn_vals,
GParam **return_vals)
{
static GParam values[2];
GRunModeType run_mode;
GStatusType status = STATUS_SUCCESS;
gint32 image_ID;
gint32 drawable_ID;
gint32 orig_image_ID;
gint32 display_ID = -1;
#ifdef GIMP_HAVE_PARASITES
Parasite *parasite;
#endif /* GIMP_HAVE_PARASITES */
gint err;
GimpExportReturnType export = EXPORT_CANCEL;
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = PARAM_STATUS;
values[0].data.d_status = STATUS_EXECUTION_ERROR;
if (strcmp (name, "file_jpeg_load") == 0)
{
INIT_I18N();
image_ID = load_image (param[1].data.d_string, run_mode, FALSE);
if (image_ID != -1)
{
*nreturn_vals = 2;
values[1].type = PARAM_IMAGE;
values[1].data.d_image = image_ID;
}
else
{
status = STATUS_EXECUTION_ERROR;
}
}
else if (strcmp (name, "file_jpeg_save") == 0)
{
INIT_I18N_UI();
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 RUN_INTERACTIVE:
case RUN_WITH_LAST_VALS:
init_gtk ();
export = gimp_export_image (&image_ID, &drawable_ID, "JPEG",
(CAN_HANDLE_RGB |
CAN_HANDLE_GRAY));
switch (export)
{
case EXPORT_EXPORT:
display_ID = gimp_display_new (image_ID);
gimp_image_set_filename (image_ID, _("Export Preview"));
gimp_displays_flush ();
break;
case EXPORT_IGNORE:
break;
case EXPORT_CANCEL:
values[0].data.d_status = STATUS_CANCEL;
return;
break;
}
break;
default:
break;
}
if (image_comment)
{
g_free (image_comment);
image_comment = NULL;
}
#ifdef GIMP_HAVE_PARASITES
parasite = gimp_image_parasite_find (orig_image_ID, "gimp-comment");
if (parasite)
{
image_comment = g_strdup (parasite->data);
parasite_free (parasite);
}
#endif /* GIMP_HAVE_PARASITES */
if (!image_comment)
image_comment = g_strdup (DEFAULT_COMMENT);
jsvals.quality = DEFAULT_QUALITY;
jsvals.smoothing = DEFAULT_SMOOTHING;
jsvals.optimize = DEFAULT_OPTIMIZE;
jsvals.progressive = DEFAULT_PROGRESSIVE;
jsvals.baseline = DEFAULT_BASELINE;
jsvals.subsmp = DEFAULT_SUBSMP;
jsvals.restart = DEFAULT_RESTART;
jsvals.dct = DEFAULT_DCT;
jsvals.preview = DEFAULT_PREVIEW;
switch (run_mode)
{
case RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data ("file_jpeg_save", &jsvals);
#ifdef GIMP_HAVE_PARASITES
/* load up the previously used values */
parasite = gimp_image_parasite_find (orig_image_ID,
"jpeg-save-options");
if (parasite)
{
jsvals.quality = ((JpegSaveVals *)parasite->data)->quality;
jsvals.smoothing = ((JpegSaveVals *)parasite->data)->smoothing;
jsvals.optimize = ((JpegSaveVals *)parasite->data)->optimize;
jsvals.progressive = ((JpegSaveVals *)parasite->data)->progressive;
jsvals.baseline = ((JpegSaveVals *)parasite->data)->baseline;
jsvals.subsmp = ((JpegSaveVals *)parasite->data)->subsmp;
jsvals.restart = ((JpegSaveVals *)parasite->data)->restart;
jsvals.dct = ((JpegSaveVals *)parasite->data)->dct;
jsvals.preview = ((JpegSaveVals *)parasite->data)->preview;
parasite_free(parasite);
}
#endif /* GIMP_HAVE_PARASITES */
/* we start an undo_group and immediately freeze undo saving
so that we can avoid sucking up tile cache with our unneeded
preview steps. */
gimp_undo_push_group_start (image_ID);
gimp_image_undo_freeze (image_ID);
/* prepare for the preview */
image_ID_global = image_ID;
orig_image_ID_global = orig_image_ID;
drawable_ID_global = drawable_ID;
/* First acquire information with a dialog */
err = save_dialog ();
/* thaw undo saving and end the undo_group. */
gimp_image_undo_thaw (image_ID);
gimp_undo_push_group_end (image_ID);
if (!err)
status = STATUS_CANCEL;
break;
case 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 = STATUS_CALLING_ERROR;
}
else
{
jsvals.quality = param[5].data.d_float;
jsvals.smoothing = param[6].data.d_float;
jsvals.optimize = param[7].data.d_int32;
#ifdef HAVE_PROGRESSIVE_JPEG
jsvals.progressive = param[8].data.d_int32;
#endif /* HAVE_PROGRESSIVE_JPEG */
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;
jsvals.preview = FALSE;
/* free up the default -- wasted some effort earlier */
if (image_comment)
g_free (image_comment);
image_comment = g_strdup (param[9].data.d_string);
if (jsvals.quality < 0.0 || jsvals.quality > 1.0)
status = STATUS_CALLING_ERROR;
else if (jsvals.smoothing < 0.0 || jsvals.smoothing > 1.0)
status = STATUS_CALLING_ERROR;
else if (jsvals.subsmp < 0 || jsvals.subsmp > 2)
status = STATUS_CALLING_ERROR;
else if (jsvals.dct < 0 || jsvals.dct > 2)
status = STATUS_CALLING_ERROR;
}
break;
case RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data ("file_jpeg_save", &jsvals);
#ifdef GIMP_HAVE_PARASITES
parasite = gimp_image_parasite_find (orig_image_ID,
"jpeg-save-options");
if (parasite)
{
jsvals.quality = ((JpegSaveVals *)parasite->data)->quality;
jsvals.smoothing = ((JpegSaveVals *)parasite->data)->smoothing;
jsvals.optimize = ((JpegSaveVals *)parasite->data)->optimize;
jsvals.progressive = ((JpegSaveVals *)parasite->data)->progressive;
jsvals.baseline = ((JpegSaveVals *)parasite->data)->baseline;
jsvals.subsmp = ((JpegSaveVals *)parasite->data)->subsmp;
jsvals.restart = ((JpegSaveVals *)parasite->data)->restart;
jsvals.dct = ((JpegSaveVals *)parasite->data)->dct;
jsvals.preview = FALSE;
parasite_free(parasite);
}
#endif /* GIMP_HAVE_PARASITES */
break;
default:
break;
}
if (status == STATUS_SUCCESS)
{
if (save_image (param[3].data.d_string,
image_ID,
drawable_ID,
orig_image_ID,
FALSE))
{
/* Store mvals data */
gimp_set_data ("file_jpeg_save", &jsvals, sizeof (JpegSaveVals));
}
else
{
status = STATUS_EXECUTION_ERROR;
}
}
if (export == 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);
}
#ifdef GIMP_HAVE_PARASITES
/* 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_parasite_detach (orig_image_ID, "gimp-comment");
if (strlen (image_comment))
{
parasite = parasite_new ("gimp-comment",
PARASITE_PERSISTENT,
strlen (image_comment) + 1,
image_comment);
gimp_image_parasite_attach (orig_image_ID, parasite);
parasite_free (parasite);
}
gimp_image_parasite_detach (orig_image_ID, "jpeg-save-options");
parasite = parasite_new ("jpeg-save-options", 0, sizeof (jsvals), &jsvals);
gimp_image_parasite_attach (orig_image_ID, parasite);
parasite_free (parasite);
#endif /* Have Parasites */
}
else
{
status = STATUS_CALLING_ERROR;
}
values[0].data.d_status = status;
}
/* Read next byte */
static guint
jpeg_getc (j_decompress_ptr cinfo)
{
struct jpeg_source_mgr * datasrc = cinfo->src;
if (datasrc->bytes_in_buffer == 0)
{
if (! (*datasrc->fill_input_buffer) (cinfo))
ERREXIT (cinfo, JERR_CANT_SUSPEND);
}
datasrc->bytes_in_buffer--;
return *datasrc->next_input_byte++;
}
/* We need our own marker parser, since early versions of libjpeg
* don't keep a conventient list of the marker's that have been
* seen. */
/*
* Marker processor for COM markers.
* This replaces the library's built-in processor, which just skips the marker.
* Note this code relies on a non-suspending data source.
*/
static GString *local_image_comments = NULL;
static boolean
COM_handler (j_decompress_ptr cinfo)
{
int length;
unsigned int ch;
length = jpeg_getc (cinfo) << 8;
length += jpeg_getc (cinfo);
if (length < 2)
return FALSE;
length -= 2; /* discount the length word itself */
if (!local_image_comments)
local_image_comments = g_string_new (NULL);
else
g_string_append_c (local_image_comments, '\n');
while (length-- > 0)
{
ch = jpeg_getc (cinfo);
g_string_append_c (local_image_comments, ch);
}
return TRUE;
}
typedef struct my_error_mgr
{
struct jpeg_error_mgr pub; /* "public" fields */
jmp_buf setjmp_buffer; /* for return to caller */
} *my_error_ptr;
/*
* Here's the routine that will replace the standard error_exit method:
*/
static 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);
}
static gint32
load_image (gchar *filename,
GRunModeType runmode,
gint preview)
{
GPixelRgn pixel_rgn;
GDrawable *drawable;
gint32 volatile image_ID;
gint32 layer_ID;
struct jpeg_decompress_struct cinfo;
struct my_error_mgr jerr;
FILE *infile;
guchar *buf;
guchar * volatile padded_buf = NULL;
guchar **rowbuf;
gchar *name;
gint image_type;
gint layer_type;
gint tile_height;
gint scanlines;
gint i, start, end;
#ifdef GIMP_HAVE_PARASITES
JpegSaveVals local_save_vals;
Parasite * volatile comment_parasite = NULL;
Parasite * volatile vals_parasite = NULL;
#endif /* GIMP_HAVE_PARASITES */
/* We set up the normal JPEG error routines. */
cinfo.err = jpeg_std_error (&jerr.pub);
jerr.pub.error_exit = my_error_exit;
if ((infile = fopen (filename, "rb")) == NULL)
{
g_warning (_("can't open \"%s\"\n"), filename);
gimp_quit ();
}
if (runmode != RUN_NONINTERACTIVE)
{
name = g_strdup_printf (_("Loading %s:"), filename);
gimp_progress_init (name);
g_free (name);
}
image_ID = -1;
/* Establish the setjmp return context for my_error_exit to use. */
if (setjmp (jerr.setjmp_buffer))
{
/* If we get here, the JPEG code has signaled an error.
* We need to clean up the JPEG object, close the input file, and return.
*/
jpeg_destroy_decompress (&cinfo);
if (infile)
fclose (infile);
if (image_ID != -1 && !preview)
gimp_image_delete (image_ID);
if (preview)
destroy_preview();
gimp_quit ();
}
/* Now we can initialize the JPEG decompression object. */
jpeg_create_decompress (&cinfo);
/* Step 2: specify data source (eg, a file) */
jpeg_stdio_src (&cinfo, infile);
/* pw - step 2.1 let the lib know we want the comments. */
jpeg_set_marker_processor (&cinfo, JPEG_COM, COM_handler);
/* Step 3: read file parameters with jpeg_read_header() */
(void) jpeg_read_header (&cinfo, TRUE);
/* We can ignore the return value from jpeg_read_header since
* (a) suspension is not possible with the stdio data source, and
* (b) we passed TRUE to reject a tables-only JPEG file as an error.
* See libjpeg.doc for more info.
*/
#ifdef GIMP_HAVE_PARASITES
if (!preview) {
/* if we had any comments then make a parasite for them */
if (local_image_comments)
{
char *string = local_image_comments->str;
g_string_free (local_image_comments,FALSE);
local_image_comments = NULL;
comment_parasite = parasite_new ("gimp-comment", PARASITE_PERSISTENT,
strlen (string) + 1, string);
}
else
{
comment_parasite = NULL;
}
/* pw - figuring out what the saved values were is non-trivial.
* They don't seem to be in the cinfo structure. For now, I will
* just use the defaults, but if someone figures out how to derive
* them this is the place to store them. */
local_save_vals.quality = DEFAULT_QUALITY;
local_save_vals.smoothing = DEFAULT_SMOOTHING;
local_save_vals.optimize = DEFAULT_OPTIMIZE;
#ifdef HAVE_PROGRESSIVE_JPEG
local_save_vals.progressive = cinfo.progressive_mode;
#else
local_save_vals.progressive = 0;
#endif /* HAVE_PROGRESSIVE_JPEG */
local_save_vals.baseline = DEFAULT_BASELINE;
local_save_vals.subsmp = DEFAULT_SUBSMP; /* sg - this _is_ there, but I'm too lazy */
local_save_vals.restart = DEFAULT_RESTART;
local_save_vals.dct = DEFAULT_DCT;
local_save_vals.preview = DEFAULT_PREVIEW;
vals_parasite = parasite_new ("jpeg-save-options", 0,
sizeof (local_save_vals), &local_save_vals);
}
#endif /* GIMP_HAVE_PARASITES */
/* Step 4: set parameters for decompression */
/* In this example, we don't need to change any of the defaults set by
* jpeg_read_header(), so we do nothing here.
*/
/* Step 5: Start decompressor */
jpeg_start_decompress (&cinfo);
/* We may need to do some setup of our own at this point before reading
* the data. After jpeg_start_decompress() we have the correct scaled
* output image dimensions available, as well as the output colormap
* if we asked for color quantization.
* In this example, we need to make an output work buffer of the right size.
*/
/* temporary buffer */
tile_height = gimp_tile_height ();
buf = g_new (guchar, tile_height * cinfo.output_width * cinfo.output_components);
if (preview)
padded_buf = g_new (guchar, tile_height * cinfo.output_width *
(cinfo.output_components + 1));
rowbuf = g_new (guchar*, tile_height);
for (i = 0; i < tile_height; i++)
rowbuf[i] = buf + cinfo.output_width * cinfo.output_components * i;
/* Create a new image of the proper size and associate the filename with it.
Preview layers, not being on the bottom of a layer stack, MUST HAVE
AN ALPHA CHANNEL!
*/
switch (cinfo.output_components)
{
case 1:
image_type = GRAY;
layer_type = preview ? GRAYA_IMAGE : GRAY_IMAGE;
break;
case 3:
image_type = RGB;
layer_type = preview ? RGBA_IMAGE : RGB_IMAGE;
break;
default:
g_message ("don't know how to load JPEGs\nwith %d color channels",
cinfo.output_components);
gimp_quit ();
}
if (preview)
{
image_ID = image_ID_global;
}
else
{
image_ID = gimp_image_new (cinfo.output_width, cinfo.output_height,
image_type);
gimp_image_set_filename (image_ID, filename);
}
if (preview)
{
layer_ID_global = layer_ID = gimp_layer_new (image_ID, _("JPEG preview"),
cinfo.output_width,
cinfo.output_height,
layer_type, 100, NORMAL_MODE);
}
else
{
layer_ID = gimp_layer_new (image_ID, _("Background"),
cinfo.output_width,
cinfo.output_height,
layer_type, 100, NORMAL_MODE);
}
drawable_global = drawable = gimp_drawable_get (layer_ID);
gimp_pixel_rgn_init (&pixel_rgn, drawable, 0, 0,
drawable->width, drawable->height, TRUE, FALSE);
#ifdef GIMP_HAVE_RESOLUTION_INFO
/* Step 5.1: if the file had resolution information, set it on the image */
if (!preview && cinfo.saw_JFIF_marker)
{
gdouble xresolution;
gdouble yresolution;
gdouble asymmetry;
xresolution = cinfo.X_density;
yresolution = cinfo.Y_density;
switch (cinfo.density_unit)
{
case 0: /* unknown -> set the aspect ratio but use the default
* image resolution
*/
asymmetry = xresolution / yresolution;
gimp_image_get_resolution (image_ID, &xresolution, &yresolution);
xresolution *= asymmetry;
break;
case 1: /* dots per inch */
break;
case 2: /* dots per cm */
xresolution *= 2.54;
yresolution *= 2.54;
gimp_image_set_unit (image_ID, GIMP_UNIT_MM);
break;
default:
g_message ("unknown density unit %d\nassuming dots per inch",
cinfo.density_unit);
break;
}
gimp_image_set_resolution (image_ID, xresolution, yresolution);
}
#endif /* GIMP_HAVE_RESOLUTION_INFO */
/* Step 6: while (scan lines remain to be read) */
/* jpeg_read_scanlines(...); */
/* Here we use the library's state variable cinfo.output_scanline as the
* loop counter, so that we don't have to keep track ourselves.
*/
while (cinfo.output_scanline < cinfo.output_height)
{
start = cinfo.output_scanline;
end = cinfo.output_scanline + tile_height;
end = MIN (end, cinfo.output_height);
scanlines = end - start;
for (i = 0; i < scanlines; i++)
jpeg_read_scanlines (&cinfo, (JSAMPARRAY) &rowbuf[i], 1);
/*
for (i = start; i < end; i++)
gimp_pixel_rgn_set_row (&pixel_rgn, tilerow[i - start], 0, i, drawable->width);
*/
if (preview) /* Add a dummy alpha channel -- convert buf to padded_buf */
{
guchar *dest = padded_buf;
guchar *src = buf;
gint num = drawable->width * scanlines;
switch (cinfo.output_components)
{
case 1:
for (i=0; i<num; i++)
{
*(dest++) = *(src++);
*(dest++) = 255;
}
break;
case 3:
for (i=0; i<num; i++)
{
*(dest++) = *(src++);
*(dest++) = *(src++);
*(dest++) = *(src++);
*(dest++) = 255;
}
break;
default:
g_warning ("JPEG - shouldn't have gotten here. Report to adam@gimp.org");
}
}
gimp_pixel_rgn_set_rect (&pixel_rgn, preview ? padded_buf : buf,
0, start, drawable->width, scanlines);
if (runmode != RUN_NONINTERACTIVE)
{
gimp_progress_update ((double) cinfo.output_scanline / (double) cinfo.output_height);
}
}
/* Step 7: Finish decompression */
jpeg_finish_decompress (&cinfo);
/* We can ignore the return value since suspension is not possible
* with the stdio data source.
*/
/* Step 8: Release JPEG decompression object */
/* This is an important step since it will release a good deal of memory. */
jpeg_destroy_decompress (&cinfo);
/* free up the temporary buffers */
g_free (rowbuf);
g_free (buf);
if (preview)
g_free (padded_buf);
/* After finish_decompress, we can close the input file.
* Here we postpone it until after no more JPEG errors are possible,
* so as to simplify the setjmp error logic above. (Actually, I don't
* think that jpeg_destroy can do an error exit, but why assume anything...)
*/
fclose (infile);
/* At this point you may want to check to see whether any corrupt-data
* warnings occurred (test whether jerr.num_warnings is nonzero).
*/
/* Tell the GIMP to display the image.
*/
gimp_image_add_layer (image_ID, layer_ID, 0);
gimp_drawable_flush (drawable);
/* pw - Last of all, attach the parasites (couldn't do it earlier -
there was no image. */
#ifdef GIMP_HAVE_PARASITES
if (!preview)
{
if (comment_parasite)
{
gimp_image_parasite_attach (image_ID, comment_parasite);
parasite_free (comment_parasite);
}
if (vals_parasite)
{
gimp_image_parasite_attach (image_ID, vals_parasite);
parasite_free (vals_parasite);
}
}
#endif /* GIMP_HAVE_PARASITES */
return image_ID;
}
/*
* sg - This is the best I can do, I'm afraid... I think it will fail
* if something bad really happens (but it might not). If you have a
* better solution, send it ;-)
*/
static void
background_error_exit (j_common_ptr cinfo)
{
if (abort_me) *abort_me = 1;
(*cinfo->err->output_message) (cinfo);
}
static gint
background_jpeg_save (gpointer *ptr)
{
preview_persistent *pp = (preview_persistent *)ptr;
guchar *t;
guchar *s;
gint i, j;
gint yend;
if (pp->abort_me || (pp->cinfo.next_scanline >= pp->cinfo.image_height))
{
struct stat buf;
gchar temp[256];
/* clean up... */
if (pp->abort_me)
{
jpeg_abort_compress (&(pp->cinfo));
}
else
{
jpeg_finish_compress (&(pp->cinfo));
}
fclose (pp->outfile);
jpeg_destroy_compress (&(pp->cinfo));
g_free (pp->temp);
g_free (pp->data);
if (pp->drawable) gimp_drawable_detach (pp->drawable);
/* display the preview stuff */
if (!pp->abort_me)
{
stat (pp->file_name, &buf);
g_snprintf (temp, sizeof (temp),
_("Size: %lu bytes (%02.01f kB)"),
buf.st_size, (float) (buf.st_size) / 1024.0);
gtk_label_set_text (GTK_LABEL (preview_size), temp);
/* and load the preview */
load_image (pp->file_name, RUN_NONINTERACTIVE, TRUE);
}
/* we cleanup here (load_image doesn't run in the background) */
unlink (pp->file_name);
g_free (pp->file_name);
if (abort_me == &(pp->abort_me)) abort_me = NULL;
g_free (pp);
gimp_displays_flush ();
gdk_flush ();
return FALSE;
}
else
{
if ((pp->cinfo.next_scanline % pp->tile_height) == 0)
{
yend = pp->cinfo.next_scanline + pp->tile_height;
yend = MIN (yend, pp->cinfo.image_height);
gimp_pixel_rgn_get_rect (&pp->pixel_rgn, pp->data, 0,
pp->cinfo.next_scanline,
pp->cinfo.image_width,
(yend - pp->cinfo.next_scanline));
pp->src = pp->data;
}
t = pp->temp;
s = pp->src;
i = pp->cinfo.image_width;
while (i--)
{
for (j = 0; j < pp->cinfo.input_components; j++)
*t++ = *s++;
if (pp->has_alpha) /* ignore alpha channel */
s++;
}
pp->src += pp->rowstride;
jpeg_write_scanlines (&(pp->cinfo), (JSAMPARRAY) &(pp->temp), 1);
return TRUE;
}
}
static gint
save_image (char *filename,
gint32 image_ID,
gint32 drawable_ID,
gint32 orig_image_ID,
int preview)
{
GPixelRgn pixel_rgn;
GDrawable *drawable;
GDrawableType drawable_type;
struct jpeg_compress_struct cinfo;
struct my_error_mgr jerr;
FILE * volatile outfile;
guchar *temp, *t;
guchar *data;
guchar *src, *s;
gchar *name;
gint has_alpha;
gint rowstride, yend;
gint i, j;
drawable = gimp_drawable_get (drawable_ID);
drawable_type = gimp_drawable_type (drawable_ID);
gimp_pixel_rgn_init (&pixel_rgn, drawable,
0, 0, drawable->width, drawable->height, FALSE, FALSE);
if (!preview)
{
name = g_strdup_printf (_("Saving %s:"), filename);
gimp_progress_init (name);
g_free (name);
}
/* Step 1: allocate and initialize JPEG compression object */
/* We have to set up the error handler first, in case the initialization
* step fails. (Unlikely, but it could happen if you are out of memory.)
* This routine fills in the contents of struct jerr, and returns jerr's
* address which we place into the link field in cinfo.
*/
cinfo.err = jpeg_std_error (&jerr.pub);
jerr.pub.error_exit = my_error_exit;
outfile = NULL;
/* Establish the setjmp return context for my_error_exit to use. */
if (setjmp (jerr.setjmp_buffer))
{
/* If we get here, the JPEG code has signaled an error.
* We need to clean up the JPEG object, close the input file, and return.
*/
jpeg_destroy_compress (&cinfo);
if (outfile)
fclose (outfile);
if (drawable)
gimp_drawable_detach (drawable);
return FALSE;
}
/* Now we can initialize the JPEG compression object. */
jpeg_create_compress (&cinfo);
/* Step 2: specify data destination (eg, a file) */
/* Note: steps 2 and 3 can be done in either order. */
/* Here we use the library-supplied code to send compressed data to a
* stdio stream. You can also write your own code to do something else.
* VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
* requires it in order to write binary files.
*/
if ((outfile = fopen (filename, "wb")) == NULL)
{
g_message ("can't open %s\n", filename);
return FALSE;
}
jpeg_stdio_dest (&cinfo, outfile);
/* Get the input image and a pointer to its data.
*/
switch (drawable_type)
{
case RGB_IMAGE:
case GRAY_IMAGE:
/* # of color components per pixel */
cinfo.input_components = drawable->bpp;
has_alpha = 0;
break;
case RGBA_IMAGE:
case GRAYA_IMAGE:
/*gimp_message ("jpeg: image contains a-channel info which will be lost");*/
/* # of color components per pixel (minus the GIMP alpha channel) */
cinfo.input_components = drawable->bpp - 1;
has_alpha = 1;
break;
case INDEXED_IMAGE:
/*gimp_message ("jpeg: cannot operate on indexed color images");*/
return FALSE;
break;
default:
/*gimp_message ("jpeg: cannot operate on unknown image types");*/
return FALSE;
break;
}
/* Step 3: set parameters for compression */
/* First we supply a description of the input image.
* Four fields of the cinfo struct must be filled in:
*/
/* image width and height, in pixels */
cinfo.image_width = drawable->width;
cinfo.image_height = drawable->height;
/* colorspace of input image */
cinfo.in_color_space = (drawable_type == RGB_IMAGE ||
drawable_type == RGBA_IMAGE)
? JCS_RGB : JCS_GRAYSCALE;
/* Now use the library's routine to set default compression parameters.
* (You must set at least cinfo.in_color_space before calling this,
* since the defaults depend on the source color space.)
*/
jpeg_set_defaults (&cinfo);
jpeg_set_quality (&cinfo, (int) (jsvals.quality * 100), jsvals.baseline);
cinfo.smoothing_factor = (int) (jsvals.smoothing * 100);
cinfo.optimize_coding = jsvals.optimize;
#ifdef HAVE_PROGRESSIVE_JPEG
if (jsvals.progressive)
{
jpeg_simple_progression (&cinfo);
}
#endif /* HAVE_PROGRESSIVE_JPEG */
switch (jsvals.subsmp)
{
case 0:
default:
cinfo.comp_info[0].h_samp_factor = 2;
cinfo.comp_info[0].v_samp_factor = 2;
cinfo.comp_info[1].h_samp_factor = 1;
cinfo.comp_info[1].v_samp_factor = 1;
cinfo.comp_info[2].h_samp_factor = 1;
cinfo.comp_info[2].v_samp_factor = 1;
break;
case 1:
cinfo.comp_info[0].h_samp_factor = 2;
cinfo.comp_info[0].v_samp_factor = 1;
cinfo.comp_info[1].h_samp_factor = 1;
cinfo.comp_info[1].v_samp_factor = 1;
cinfo.comp_info[2].h_samp_factor = 1;
cinfo.comp_info[2].v_samp_factor = 1;
break;
case 2:
cinfo.comp_info[0].h_samp_factor = 1;
cinfo.comp_info[0].v_samp_factor = 1;
cinfo.comp_info[1].h_samp_factor = 1;
cinfo.comp_info[1].v_samp_factor = 1;
cinfo.comp_info[2].h_samp_factor = 1;
cinfo.comp_info[2].v_samp_factor = 1;
break;
}
cinfo.restart_interval = 0;
cinfo.restart_in_rows = jsvals.restart;
switch (jsvals.dct)
{
case 0:
default:
cinfo.dct_method = JDCT_ISLOW;
break;
case 1:
cinfo.dct_method = JDCT_IFAST;
break;
case 2:
cinfo.dct_method = JDCT_FLOAT;
break;
}
#ifdef GIMP_HAVE_RESOLUTION_INFO
{
gdouble xresolution;
gdouble yresolution;
gimp_image_get_resolution (orig_image_ID, &xresolution, &yresolution);
if (xresolution > 1e-5 && yresolution > 1e-5)
{
gdouble factor;
factor = gimp_unit_get_factor (gimp_image_get_unit (orig_image_ID));
if (factor == 2.54 /* cm */ ||
factor == 25.4 /* mm */)
{
cinfo.density_unit = 2; /* dots per cm */
xresolution /= 2.54;
yresolution /= 2.54;
}
else
{
cinfo.density_unit = 1; /* dots per inch */
}
cinfo.X_density = xresolution;
cinfo.Y_density = yresolution;
}
}
#endif /* GIMP_HAVE_RESOLUTION_INFO */
/* Step 4: Start compressor */
/* TRUE ensures that we will write a complete interchange-JPEG file.
* Pass TRUE unless you are very sure of what you're doing.
*/
jpeg_start_compress (&cinfo, TRUE);
/* Step 4.1: Write the comment out - pw */
if (image_comment && *image_comment)
{
jpeg_write_marker (&cinfo,
JPEG_COM,
image_comment,
strlen (image_comment));
}
/* Step 5: while (scan lines remain to be written) */
/* jpeg_write_scanlines(...); */
/* Here we use the library's state variable cinfo.next_scanline as the
* loop counter, so that we don't have to keep track ourselves.
* To keep things simple, we pass one scanline per call; you can pass
* more if you wish, though.
*/
/* JSAMPLEs per row in image_buffer */
rowstride = drawable->bpp * drawable->width;
temp = (guchar *) g_malloc (cinfo.image_width * cinfo.input_components);
data = (guchar *) g_malloc (rowstride * gimp_tile_height ());
/* fault if cinfo.next_scanline isn't initially a multiple of
* gimp_tile_height */
src = NULL;
/*
* sg - if we preview, we want this to happen in the background -- do
* not duplicate code in the future; for now, it's OK
*/
if (preview)
{
preview_persistent *pp = g_malloc (sizeof (preview_persistent));
if (pp == NULL) return FALSE;
/* pass all the information we need */
pp->cinfo = cinfo;
pp->tile_height = gimp_tile_height();
pp->data = data;
pp->outfile = outfile;
pp->has_alpha = has_alpha;
pp->rowstride = rowstride;
pp->temp = temp;
pp->data = data;
pp->drawable = drawable;
pp->pixel_rgn = pixel_rgn;
pp->src = NULL;
pp->file_name = filename;
pp->abort_me = 0;
abort_me = &(pp->abort_me);
jerr.pub.error_exit = background_error_exit;
gtk_idle_add ((GtkFunction) background_jpeg_save, (gpointer *)pp);
/* background_jpeg_save() will cleanup as needed */
return TRUE;
}
while (cinfo.next_scanline < cinfo.image_height)
{
if ((cinfo.next_scanline % gimp_tile_height ()) == 0)
{
yend = cinfo.next_scanline + gimp_tile_height ();
yend = MIN (yend, cinfo.image_height);
gimp_pixel_rgn_get_rect (&pixel_rgn, data, 0, cinfo.next_scanline, cinfo.image_width,
(yend - cinfo.next_scanline));
src = data;
}
t = temp;
s = src;
i = cinfo.image_width;
while (i--)
{
for (j = 0; j < cinfo.input_components; j++)
*t++ = *s++;
if (has_alpha) /* ignore alpha channel */
s++;
}
src += rowstride;
jpeg_write_scanlines (&cinfo, (JSAMPARRAY) &temp, 1);
if ((cinfo.next_scanline % 5) == 0)
gimp_progress_update ((double) cinfo.next_scanline / (double) cinfo.image_height);
}
/* Step 6: Finish compression */
jpeg_finish_compress (&cinfo);
/* After finish_compress, we can close the output file. */
fclose (outfile);
/* Step 7: release JPEG compression object */
/* This is an important step since it will release a good deal of memory. */
jpeg_destroy_compress (&cinfo);
/* free the temporary buffer */
g_free (temp);
g_free (data);
/* And we're done! */
/*gimp_do_progress (1, 1);*/
gimp_drawable_detach (drawable);
return TRUE;
}
static void
make_preview (void)
{
gchar *tn;
destroy_preview ();
if (jsvals.preview)
{
tn = tempnam(NULL, "gimp"); /* user temp dir? */
save_image (tn, image_ID_global,
drawable_ID_global, orig_image_ID_global, TRUE);
}
else
{
gtk_label_set_text (GTK_LABEL (preview_size), _("Size: unknown"));
gtk_widget_draw (preview_size, NULL);
gimp_displays_flush ();
gdk_flush();
}
}
static void
destroy_preview (void)
{
if (abort_me)
{
*abort_me = 1; /* signal the background save to stop */
}
if (drawable_global)
{
gimp_drawable_detach (drawable_global);
drawable_global = NULL;
}
if (layer_ID_global != -1 && image_ID_global != -1)
{
gimp_image_remove_layer (image_ID_global, layer_ID_global);
/* gimp_layer_delete(layer_ID_global); */
layer_ID_global = -1;
}
}
static void
add_menu_item (GtkWidget *menu,
gchar *label,
guint op_no,
GtkSignalFunc callback)
{
GtkWidget *menu_item = gtk_menu_item_new_with_label (label);
gtk_container_add (GTK_CONTAINER (menu), menu_item);
gtk_signal_connect (GTK_OBJECT (menu_item), "activate",
(GtkSignalFunc) callback, &op_no);
gtk_widget_show (menu_item);
}
static void
init_gtk (void)
{
gchar **argv;
gint argc;
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("jpeg");
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
}
static gint
save_dialog (void)
{
GtkWidget *dlg;
GtkWidget *vbox;
GtkWidget *main_vbox;
GtkWidget *label;
GtkWidget *scale;
GtkWidget *frame;
GtkWidget *table;
GtkWidget *toggle;
GtkWidget *abox;
GtkObject *scale_data;
GtkWidget *progressive;
GtkWidget *baseline;
GtkWidget *restart;
GtkWidget *preview;
/* GtkWidget *preview_size; -- global */
GtkWidget *menu;
GtkWidget *subsmp_menu;
GtkWidget *dct_menu;
GtkWidget *text;
GtkWidget *com_frame;
GtkWidget *com_table;
GtkWidget *vscrollbar;
GtkWidget *prv_frame;
GDrawableType dtype;
dlg = gimp_dialog_new (_("Save as Jpeg"), "jpeg",
gimp_plugin_help_func, "filters/jpeg.html",
GTK_WIN_POS_MOUSE,
FALSE, TRUE, FALSE,
_("OK"), save_ok_callback,
NULL, NULL, NULL, TRUE, FALSE,
_("Cancel"), gtk_widget_destroy,
NULL, 1, NULL, FALSE, TRUE,
NULL);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
GTK_SIGNAL_FUNC (save_close_callback),
NULL);
main_vbox = gtk_vbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 6);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), main_vbox,
TRUE, TRUE, 0);
gtk_widget_show (main_vbox);
/* sg - preview */
prv_frame = gtk_frame_new (_("Image Preview"));
gtk_frame_set_shadow_type (GTK_FRAME (prv_frame), GTK_SHADOW_ETCHED_IN);
gtk_box_pack_start (GTK_BOX (main_vbox), prv_frame, FALSE, FALSE, 0);
vbox = gtk_vbox_new (FALSE, 2);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 4);
gtk_container_add (GTK_CONTAINER (prv_frame), vbox);
gtk_widget_show (vbox);
preview = gtk_check_button_new_with_label (_("Preview (in Image Window)"));
gtk_box_pack_start (GTK_BOX (vbox), preview, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (preview), "toggled",
GTK_SIGNAL_FUNC (gimp_toggle_button_update),
&jsvals.preview);
gtk_signal_connect (GTK_OBJECT (preview), "toggled",
GTK_SIGNAL_FUNC (make_preview),
NULL);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (preview), jsvals.preview);
gtk_widget_show (preview);
preview_size = gtk_label_new (_("Size: unknown"));
gtk_misc_set_alignment (GTK_MISC (preview_size), 0.0, 0.5);
gtk_box_pack_start (GTK_BOX (vbox), preview_size, FALSE, FALSE, 0);
gtk_widget_show (preview_size);
gtk_widget_show (prv_frame);
make_preview ();
/* parameter settings */
frame = gtk_frame_new (_("Parameter Settings"));
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
table = gtk_table_new (9, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 4);
gtk_table_set_row_spacings (GTK_TABLE (table), 4);
gtk_container_set_border_width (GTK_CONTAINER (table), 4);
gtk_container_add (GTK_CONTAINER (frame), table);
label = gtk_label_new (_("Quality:"));
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1,
GTK_FILL | GTK_SHRINK, GTK_FILL, 0, 0);
gtk_widget_show (label);
scale_data = gtk_adjustment_new (jsvals.quality, 0.0, 1.0, 0.01, 0.01, 0.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data));
gtk_widget_set_usize (scale, SCALE_WIDTH, 0);
gtk_table_attach (GTK_TABLE (table), scale, 1, 3, 0, 1,
GTK_FILL | GTK_EXPAND, GTK_FILL, 0, 0);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_scale_set_digits (GTK_SCALE (scale), 2);
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&jsvals.quality);
gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed",
GTK_SIGNAL_FUNC (make_preview),
NULL);
gtk_widget_show (scale);
label = gtk_label_new (_("Smoothing:"));
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 1, 2,
GTK_FILL | GTK_SHRINK, GTK_FILL, 0, 0);
gtk_widget_show (label);
scale_data = gtk_adjustment_new (jsvals.smoothing, 0.0, 1.0, 0.01, 0.01, 0.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data));
gtk_widget_set_usize (scale, SCALE_WIDTH, 0);
gtk_table_attach (GTK_TABLE (table), scale, 1, 3, 1, 2,
GTK_FILL | GTK_EXPAND, GTK_FILL, 0, 0);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_scale_set_digits (GTK_SCALE (scale), 2);
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&jsvals.smoothing);
gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed",
GTK_SIGNAL_FUNC (make_preview),
NULL);
gtk_widget_show (scale);
/* sg - have to init scale here */
scale_data = gtk_adjustment_new ((jsvals.restart == 0) ? 1 : jsvals.restart,
1, 64, 1, 1, 0.0);
restart_markers_scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data));
restart = gtk_check_button_new_with_label (_("Restart Markers"));
gtk_table_attach (GTK_TABLE (table), restart, 0, 1, 2, 3,
GTK_FILL, 0, 0, 0);
gtk_signal_connect (GTK_OBJECT (restart), "toggled",
GTK_SIGNAL_FUNC (save_restart_toggle_update),
scale_data);
gtk_widget_show (restart);
restart_markers_label = gtk_label_new (_("Restart Frequency (Rows):"));
gtk_misc_set_alignment (GTK_MISC (restart_markers_label), 1.0, 1.0);
gtk_table_attach (GTK_TABLE (table), restart_markers_label, 0, 1, 3, 4,
GTK_FILL | GTK_SHRINK, GTK_FILL, 0, 0);
gtk_widget_show (restart_markers_label);
abox = gtk_alignment_new (0.5, 1.0, 1.0, 0.0);
gtk_table_attach (GTK_TABLE (table), abox, 1, 3, 2, 4,
GTK_EXPAND | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (abox);
gtk_widget_set_usize (restart_markers_scale, SCALE_WIDTH, 0);
gtk_container_add (GTK_CONTAINER (abox), restart_markers_scale);
gtk_scale_set_value_pos (GTK_SCALE (restart_markers_scale), GTK_POS_TOP);
gtk_scale_set_digits (GTK_SCALE (restart_markers_scale), 0);
gtk_range_set_update_policy (GTK_RANGE (restart_markers_scale),
GTK_UPDATE_DELAYED);
gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed",
GTK_SIGNAL_FUNC (save_restart_update),
restart);
gtk_widget_set_sensitive (restart_markers_label,
(jsvals.restart ? TRUE : FALSE));
gtk_widget_set_sensitive (restart_markers_scale,
(jsvals.restart ? TRUE : FALSE));
gtk_widget_show (restart_markers_scale);
toggle = gtk_check_button_new_with_label (_("Optimize"));
gtk_table_attach (GTK_TABLE (table), toggle, 0, 3, 4, 5,
GTK_FILL, 0, 0, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
GTK_SIGNAL_FUNC (gimp_toggle_button_update),
&jsvals.optimize);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
GTK_SIGNAL_FUNC (make_preview),
NULL);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), jsvals.optimize);
gtk_widget_show (toggle);
progressive = gtk_check_button_new_with_label (_("Progressive"));
gtk_table_attach (GTK_TABLE (table), progressive, 0, 3, 5, 6,
GTK_FILL, 0, 0, 0);
gtk_signal_connect (GTK_OBJECT (progressive), "toggled",
GTK_SIGNAL_FUNC (gimp_toggle_button_update),
&jsvals.progressive);
gtk_signal_connect (GTK_OBJECT (progressive), "toggled",
GTK_SIGNAL_FUNC (make_preview),
NULL);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (progressive),
jsvals.progressive);
gtk_widget_show (progressive);
#ifndef HAVE_PROGRESSIVE_JPEG
gtk_widget_set_sensitive (progressive, FALSE);
#endif
baseline = gtk_check_button_new_with_label (_("Force Baseline JPEG (Readable by all Decoders)"));
gtk_table_attach (GTK_TABLE (table), baseline, 0, 3, 6, 7,
GTK_FILL, 0, 0, 0);
gtk_signal_connect (GTK_OBJECT (baseline), "toggled",
GTK_SIGNAL_FUNC (gimp_toggle_button_update),
&jsvals.baseline);
gtk_signal_connect (GTK_OBJECT (baseline), "toggled",
GTK_SIGNAL_FUNC (make_preview),
NULL);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (baseline),
jsvals.baseline);
gtk_widget_show (baseline);
/* build option menu (code taken from app/buildmenu.c) */
menu = gtk_menu_new ();
add_menu_item (menu, "2x2,1x1,1x1", 0, subsmp_callback);
add_menu_item (menu, "2x1,1x1,1x1 (4:2:2)", 1, subsmp_callback);
add_menu_item (menu, "1x1,1x1,1x1", 2, subsmp_callback);
subsmp_menu = gtk_option_menu_new ();
label = gtk_label_new (_("Subsampling:"));
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 2, 7, 8,
GTK_FILL | GTK_SHRINK, GTK_FILL, 0, 0);
gtk_table_attach (GTK_TABLE (table), subsmp_menu, 2, 3, 7, 8,
GTK_FILL | GTK_EXPAND, GTK_FILL, 0, 0);
gtk_widget_show (label);
gtk_widget_show (subsmp_menu);
gtk_option_menu_set_menu (GTK_OPTION_MENU (subsmp_menu), menu);
/* DCT method */
menu = gtk_menu_new ();
add_menu_item (menu, _("Fast integer"), 1, dct_callback);
add_menu_item (menu, _("Integer"), 0, dct_callback);
add_menu_item (menu, _("Floating-point"), 2, dct_callback);
dct_menu = gtk_option_menu_new ();
label = gtk_label_new (_("DCT Method (Speed/Quality Tradeoff):"));
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 2, 8, 9,
GTK_FILL | GTK_SHRINK, GTK_FILL, 0, 0);
gtk_table_attach (GTK_TABLE (table), dct_menu, 2, 3, 8, 9,
GTK_FILL | GTK_EXPAND, GTK_FILL, 0, 0);
gtk_widget_show (label);
gtk_widget_show (dct_menu);
gtk_option_menu_set_menu (GTK_OPTION_MENU (dct_menu), menu);
gtk_option_menu_set_history (GTK_OPTION_MENU (dct_menu), 1);
dtype = gimp_drawable_type (drawable_ID_global);
if (dtype != RGB_IMAGE && dtype != RGBA_IMAGE)
{
gtk_widget_set_sensitive (subsmp_menu, FALSE);
}
com_frame = gtk_frame_new (_("Image Comments"));
gtk_frame_set_shadow_type (GTK_FRAME (com_frame), GTK_SHADOW_ETCHED_IN);
gtk_box_pack_start (GTK_BOX (main_vbox), com_frame, TRUE, TRUE, 0);
com_table = gtk_table_new (1, 2, FALSE);
gtk_container_set_border_width (GTK_CONTAINER (com_table), 4);
gtk_container_add (GTK_CONTAINER (com_frame), com_table);
text = gtk_text_new (NULL, NULL);
gtk_text_set_editable (GTK_TEXT (text), TRUE);
gtk_widget_set_usize (text, -1, 3); /* //HB: restrict to 3 line height
* to allow 800x600 mode */
if (image_comment)
gtk_text_insert (GTK_TEXT (text), NULL, NULL, NULL, image_comment, -1);
gtk_table_attach (GTK_TABLE (com_table), text, 0, 1, 0, 1,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
GTK_EXPAND | GTK_SHRINK | GTK_FILL, 0, 0);
/* Add a vertical scrollbar to the GtkText widget */
vscrollbar = gtk_vscrollbar_new (GTK_TEXT (text)->vadj);
gtk_table_attach (GTK_TABLE (com_table), vscrollbar, 1, 2, 0, 1,
GTK_FILL, GTK_EXPAND | GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (vscrollbar);
/* pw - mild hack here. I didn't like redoing the comment string
* each time a character was typed, so I associated the text area
* with the dialog. That way, just before the dialog destroys
* itself (once the ok button is hit) it can save whatever was in
* the comment text area to the comment string. See the
* save-ok-callback for more details. */
gtk_object_set_data (GTK_OBJECT (dlg), "text", text);
gtk_widget_show (text);
gtk_widget_show (com_frame);
gtk_widget_show (com_table);
gtk_widget_show (frame);
gtk_widget_show (table);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return jsint.run;
}
/* Save interface functions */
static void
save_close_callback (GtkWidget *widget,
gpointer data)
{
destroy_preview ();
gimp_displays_flush ();
gtk_main_quit ();
}
static void
save_ok_callback (GtkWidget *widget,
gpointer data)
{
GtkWidget *text;
jsint.run = TRUE;
/* pw - get the comment text object and grab it's data */
text = gtk_object_get_data (GTK_OBJECT (data), "text");
if (image_comment != NULL)
{
g_free (image_comment);
image_comment = NULL;
}
/* pw - gtk_editable_get_chars allocates a copy of the string, so
* don't worry about the gtk_widget_destroy killing it. */
image_comment = gtk_editable_get_chars (GTK_EDITABLE (text), 0, -1);
gtk_widget_destroy (GTK_WIDGET (data));
}
static void
save_restart_toggle_update (GtkWidget *widget,
GtkAdjustment *adjustment)
{
save_restart_update (adjustment, widget);
}
static void
save_restart_update (GtkAdjustment *adjustment,
GtkWidget *toggle)
{
jsvals.restart = GTK_TOGGLE_BUTTON (toggle)->active ? adjustment->value : 0;
gtk_widget_set_sensitive (restart_markers_label,
(jsvals.restart ? TRUE : FALSE));
gtk_widget_set_sensitive (restart_markers_scale,
(jsvals.restart ? TRUE : FALSE));
make_preview ();
}
static void
subsmp_callback (GtkWidget *widget,
gpointer data)
{
jsvals.subsmp = *((guchar *) data);
make_preview ();
}
static void
dct_callback (GtkWidget *widget,
gpointer data)
{
jsvals.dct = *((guchar *) data);
make_preview ();
}
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