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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 <signal.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"
-
-
- #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 = -1;
- static gint32 drawable_ID_global = -1;
- static gint32 layer_ID_global = -1;
- static GtkWidget *preview_size = NULL;
- static GimpDrawable *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;
- gboolean has_alpha;
- gint rowstride;
- guchar *temp;
- guchar *data;
- guchar *src;
- GimpDrawable *drawable;
- GimpPixelRgn pixel_rgn;
- gchar *file_name;
- gboolean abort_me;
- } PreviewPersistent;
-
- static gboolean *abort_me = NULL;
-
-
- /* Declare local functions.
- */
- static void query (void);
- static void run (gchar *name,
- gint nparams,
- GimpParam *param,
- gint *nreturn_vals,
- GimpParam **return_vals);
- static gint32 load_image (gchar *filename,
- GimpRunModeType runmode,
- gboolean preview);
- static gboolean save_image (gchar *filename,
- gint32 image_ID,
- gint32 drawable_ID,
- gint32 orig_image_ID,
- gboolean preview);
-
- static gboolean 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 menu_callback (GtkWidget *widget,
- gpointer data);
-
-
- GimpPlugInInfo 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 GimpParamDef load_args[] =
- {
- { GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
- { GIMP_PDB_STRING, "filename", "The name of the file to load" },
- { GIMP_PDB_STRING, "raw_filename", "The name of the file to load" }
- };
- static GimpParamDef load_return_vals[] =
- {
- { GIMP_PDB_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 GimpParamDef save_args[] =
- {
- { GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
- { 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 - ignored if not compiled with HAVE_PROGRESSIVE_JPEG (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", "Frequency of restart markers (in rows, 0 = no restart markers)" },
- { GIMP_PDB_INT32, "dct", "DCT algorithm to use (speed/quality tradeoff)" }
- };
- static gint nsave_args = sizeof (save_args) / sizeof (save_args[0]);
-
- 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,
- GIMP_PLUGIN,
- 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*",
- GIMP_PLUGIN,
- 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,
- GimpParam *param,
- gint *nreturn_vals,
- GimpParam **return_vals)
- {
- static GimpParam values[2];
- GimpRunModeType run_mode;
- GimpPDBStatusType status = GIMP_PDB_SUCCESS;
- gint32 image_ID;
- gint32 drawable_ID;
- gint32 orig_image_ID;
- gint32 display_ID = -1;
- #ifdef GIMP_HAVE_PARASITES
- GimpParasite *parasite;
- #endif /* GIMP_HAVE_PARASITES */
- gboolean err;
- GimpExportReturnType export = GIMP_EXPORT_CANCEL;
-
- run_mode = param[0].data.d_int32;
-
- *nreturn_vals = 1;
- *return_vals = values;
- values[0].type = GIMP_PDB_STATUS;
- values[0].data.d_status = GIMP_PDB_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 = GIMP_PDB_IMAGE;
- values[1].data.d_image = image_ID;
- }
- else
- {
- status = GIMP_PDB_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 GIMP_RUN_INTERACTIVE:
- case GIMP_RUN_WITH_LAST_VALS:
- gimp_ui_init ("jpeg", 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:
- display_ID = gimp_display_new (image_ID);
- gimp_image_set_filename (image_ID, _("Export Preview"));
- gimp_displays_flush ();
- 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;
-
- #ifdef GIMP_HAVE_PARASITES
- parasite = gimp_image_parasite_find (orig_image_ID, "gimp-comment");
- if (parasite)
- {
- image_comment = g_strdup (parasite->data);
- gimp_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 GIMP_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;
- gimp_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 = GIMP_PDB_CANCEL;
- break;
-
- 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
- {
- 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 */
- g_free (image_comment);
- image_comment = g_strdup (param[9].data.d_string);
-
- if (jsvals.quality < 0.0 || jsvals.quality > 1.0)
- 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 > 2)
- status = GIMP_PDB_CALLING_ERROR;
- else if (jsvals.dct < 0 || jsvals.dct > 2)
- status = GIMP_PDB_CALLING_ERROR;
- }
- break;
-
- case GIMP_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;
- gimp_parasite_free (parasite);
- }
- #endif /* GIMP_HAVE_PARASITES */
- break;
-
- default:
- break;
- }
-
- if (status == GIMP_PDB_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 = 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);
- }
-
- #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 (image_comment && strlen (image_comment))
- {
- parasite = gimp_parasite_new ("gimp-comment",
- GIMP_PARASITE_PERSISTENT,
- strlen (image_comment) + 1,
- image_comment);
- gimp_image_parasite_attach (orig_image_ID, parasite);
- gimp_parasite_free (parasite);
- }
- gimp_image_parasite_detach (orig_image_ID, "jpeg-save-options");
-
- parasite = gimp_parasite_new ("jpeg-save-options",
- 0, sizeof (jsvals), &jsvals);
- gimp_image_parasite_attach (orig_image_ID, parasite);
- gimp_parasite_free (parasite);
- #endif /* Have Parasites */
- }
- else
- {
- status = GIMP_PDB_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)
- {
- gint length;
- guint 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,
- GimpRunModeType runmode,
- gboolean preview)
- {
- GimpPixelRgn pixel_rgn;
- GimpDrawable *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;
- GimpParasite * volatile comment_parasite = NULL;
- GimpParasite * 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_message (_("can't open \"%s\"\n"), filename);
- gimp_quit ();
- }
-
- if (runmode != GIMP_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 && local_image_comments->len)
- {
- gchar *string = local_image_comments->str;
- g_string_free (local_image_comments, FALSE);
- local_image_comments = NULL;
- comment_parasite = gimp_parasite_new ("gimp-comment",
- GIMP_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 = gimp_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 = GIMP_GRAY;
- layer_type = preview ? GIMP_GRAYA_IMAGE : GIMP_GRAY_IMAGE;
- break;
-
- case 3:
- image_type = GIMP_RGB;
- layer_type = preview ? GIMP_RGBA_IMAGE : GIMP_RGB_IMAGE;
- break;
-
- default:
- g_message ("don't know how to load JPEGs\nwith %d color channels",
- cinfo.output_components);
- gimp_quit ();
- break;
- }
-
- 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, GIMP_NORMAL_MODE);
- }
- else
- {
- layer_ID = gimp_layer_new (image_ID, _("Background"),
- cinfo.output_width,
- cinfo.output_height,
- layer_type, 100, GIMP_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);
-
- 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");
- break;
- }
- }
-
- gimp_pixel_rgn_set_rect (&pixel_rgn, preview ? padded_buf : buf,
- 0, start, drawable->width, scanlines);
-
- if (runmode != GIMP_RUN_NONINTERACTIVE)
- {
- gimp_progress_update ((gdouble) cinfo.output_scanline /
- (gdouble) 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);
- gimp_parasite_free (comment_parasite);
- }
-
- if (vals_parasite)
- {
- gimp_image_parasite_attach (image_ID, vals_parasite);
- gimp_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 = TRUE;
- (*cinfo->err->output_message) (cinfo);
- }
-
- static gboolean
- background_jpeg_save (PreviewPersistent *pp)
- {
- guchar *t;
- guchar *s;
- gint i, j;
- gint yend;
-
- if (pp->abort_me || (pp->cinfo.next_scanline >= pp->cinfo.image_height))
- {
- /* 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)
- {
- struct stat buf;
- gchar temp[128];
-
- 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, GIMP_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 gboolean
- save_image (gchar *filename,
- gint32 image_ID,
- gint32 drawable_ID,
- gint32 orig_image_ID,
- gboolean preview)
- {
- GimpPixelRgn pixel_rgn;
- GimpDrawable *drawable;
- GimpImageType 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;
- gboolean 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 GIMP_RGB_IMAGE:
- case GIMP_GRAY_IMAGE:
- /* # of color components per pixel */
- cinfo.input_components = drawable->bpp;
- has_alpha = FALSE;
- break;
-
- case GIMP_RGBA_IMAGE:
- case GIMP_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 = TRUE;
- break;
-
- case GIMP_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 == GIMP_RGB_IMAGE ||
- drawable_type == GIMP_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, (gint) (jsvals.quality * 100), jsvals.baseline);
- cinfo.smoothing_factor = (gint) (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 = g_new (guchar, cinfo.image_width * cinfo.input_components);
- data = g_new (guchar, 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)
- {
- PreviewPersistent *pp = g_new (PreviewPersistent, 1);
-
- /* 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 = FALSE;
- 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 ((gdouble) cinfo.next_scanline /
- (gdouble) 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 = gimp_temp_name ("jpeg");
- 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 = TRUE; /* 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)
- {
- /* assuming that reference counting is working correctly,
- we do not need to delete the layer, removing it from
- the image should be sufficient */
- gimp_image_remove_layer (image_ID_global, layer_ID_global);
-
- layer_ID_global = -1;
- }
- }
-
- static gboolean
- 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 *text;
- GtkWidget *com_frame;
- GtkWidget *com_table;
- GtkWidget *vscrollbar;
-
- GtkWidget *prv_frame;
- GimpImageType dtype;
-
- dlg = gimp_dialog_new (_("Save as JPEG"), "jpeg",
- gimp_standard_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);
-
- /* Subsampling */
- menu =
- gimp_option_menu_new2 (FALSE,
- menu_callback,
- &jsvals.subsmp, GINT_TO_POINTER (jsvals.subsmp),
- "2x2,1x1,1x1", GINT_TO_POINTER (0), NULL,
- "2x1,1x1,1x1 (4:2:2)", GINT_TO_POINTER (1), NULL,
- "1x1,1x1,1x1", GINT_TO_POINTER (2), NULL,
- NULL);
-
- gimp_table_attach_aligned (GTK_TABLE (table), 1, 7,
- _("Subsampling:"),
- 1.0, 0.5,
- menu, 1, FALSE);
-
- /* DCT method */
- menu =
- gimp_option_menu_new2 (FALSE,
- menu_callback,
- &jsvals.dct, GINT_TO_POINTER (jsvals.dct),
- _("Fast Integer"), GINT_TO_POINTER (1), NULL,
- _("Integer"), GINT_TO_POINTER (0), NULL,
- _("Floating-Point"), GINT_TO_POINTER (2), NULL,
- NULL);
-
- gimp_table_attach_aligned (GTK_TABLE (table), 1, 8,
- _("DCT method (Speed/quality tradeoff):"),
- 1.0, 0.5,
- menu, 1, FALSE);
-
- dtype = gimp_drawable_type (drawable_ID_global);
- if (dtype != GIMP_RGB_IMAGE && dtype != GIMP_RGBA_IMAGE)
- gtk_widget_set_sensitive (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");
-
- /* pw - gtk_editable_get_chars allocates a copy of the string, so
- * don't worry about the gtk_widget_destroy killing it. */
-
- g_free (image_comment);
- image_comment = NULL;
-
- if (text)
- 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
- menu_callback (GtkWidget *widget,
- gpointer data)
- {
- gimp_menu_item_update (widget, data);
- make_preview ();
- }
-