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Gimp/plug-ins/jpeg/jpeg-save.c
Michael Natterer a446f3d7fb use the new tooltip API instead of the old deprecated one. Removed 
2007-11-09  Michael Natterer  <mitch@gimp.org>

	* libgimpwidgets/gimphelpui.[ch]: use the new tooltip API instead
	of the old deprecated one. Removed _gimp_help_init(). Remember
	whether tooltips are enabled or not in a local variable that can
	only be altered at startup time and not after. The API now expects
	markup instead of plain text which might cause warnings and
	perhaps needs to be changed.

	* libgimpwidgets/gimpwidgets-private.c: don't call _gimp_help_init().

	* app/config/gimpguiconfig.c: made show-tooltips a
	GIMP_CONFIG_PARAM_RESTART property.

	* app/widgets/gimptoolbox-color-area.c: don't add the tooltip here...

	* app/widgets/gimptoolbox.c: ...but here (as for all other
	indicators). Also escape '&' properly because we now use markup.

	* app/tools/gimpselectionoptions.c
	* app/widgets/gimpeditor.c
	* app/widgets/gimpwidgets-utils.c: print modifiers and
	shortcuts in bold instead of in ().

	* app/widgets/gimpcontainertreeview.c: show tooltips on rows if
	gimp_viewable_get_description() returns a tip.

	* app/dialogs/preferences-dialog.c
	* plug-ins/jpeg/jpeg-save.c
	* plug-ins/MapObject/mapobject_ui.c
	* plug-ins/Lighting/lighting_ui.c
	* plug-ins/common/animationplay.c
	* plug-ins/common/warp.c: no need to add event boxes just to have
	tooltips, the new ones work on all widgets.


svn path=/trunk/; revision=24093
2007-11-09 11:17:00 +00:00

1624 lines
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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 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.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <setjmp.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <glib/gstdio.h>
#include <jpeglib.h>
#include <jerror.h>
#ifdef HAVE_EXIF
#include <libexif/exif-data.h>
#endif /* HAVE_EXIF */
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#include "jpeg.h"
#include "jpeg-settings.h"
#include "jpeg-icc.h"
#include "jpeg-save.h"
#define SCALE_WIDTH 125
/* See bugs #63610 and #61088 for a discussion about the quality settings */
#define DEFAULT_QUALITY 85.0
#define DEFAULT_SMOOTHING 0.0
#define DEFAULT_OPTIMIZE TRUE
#define DEFAULT_PROGRESSIVE FALSE
#define DEFAULT_BASELINE TRUE
#define DEFAULT_SUBSMP 0
#define DEFAULT_RESTART 0
#define DEFAULT_DCT 0
#define DEFAULT_PREVIEW FALSE
#define DEFAULT_EXIF TRUE
#define DEFAULT_THUMBNAIL FALSE
#define DEFAULT_XMP TRUE
#define DEFAULT_USE_ORIG_QUALITY FALSE
#define JPEG_DEFAULTS_PARASITE "jpeg-save-defaults"
typedef struct
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
gint tile_height;
FILE *outfile;
gboolean has_alpha;
gint rowstride;
guchar *temp;
guchar *data;
guchar *src;
GimpDrawable *drawable;
GimpPixelRgn pixel_rgn;
const gchar *file_name;
gboolean abort_me;
} PreviewPersistent;
/*le added : struct containing pointers to save dialog*/
typedef struct
{
gboolean run;
GtkWidget *use_restart_markers; /*checkbox setting use restart markers*/
GtkTextBuffer *text_buffer;
GtkObject *scale_data; /*for restart markers*/
gulong handler_id_restart;
GtkObject *quality; /*quality slidebar*/
GtkObject *smoothing; /*smoothing slidebar*/
GtkWidget *optimize; /*optimize togle*/
GtkWidget *progressive; /*progressive toggle*/
GtkWidget *subsmp; /*subsampling side select*/
GtkWidget *restart; /*spinner for setting frequency restart markers*/
GtkWidget *dct; /*DCT side select*/
GtkWidget *preview; /*show preview toggle checkbox*/
GtkWidget *save_exif;
GtkWidget *save_thumbnail;
GtkWidget *save_xmp;
GtkWidget *use_orig_quality; /*quant tables toggle*/
} JpegSaveGui;
static void make_preview (void);
static void save_restart_update (GtkAdjustment *adjustment,
GtkWidget *toggle);
static void subsampling_changed (GtkWidget *combo,
GtkObject *entry);
static void quality_changed (GtkObject *scale_entry,
GtkWidget *toggle);
static void use_orig_qual_changed (GtkWidget *toggle,
GtkObject *scale_entry);
static void use_orig_qual_changed2 (GtkWidget *toggle,
GtkWidget *combo);
#ifdef HAVE_EXIF
static gint create_thumbnail (gint32 image_ID,
gint32 drawable_ID,
gdouble quality,
guchar **thumbnail_buffer);
#endif /* HAVE_EXIF */
static GtkWidget *restart_markers_scale = NULL;
static GtkWidget *restart_markers_label = NULL;
static GtkWidget *preview_size = NULL;
static gboolean *abort_me = NULL;
static void save_dialog_response (GtkWidget *widget,
gint response_id,
gpointer data);
static void load_gui_defaults (JpegSaveGui *pg);
static void save_defaults (void);
/*
* 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];
g_stat (pp->file_name, &buf);
g_snprintf (temp, sizeof (temp),
_("File size: %02.01f kB"),
(gdouble) (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) */
g_unlink (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;
}
}
gboolean
save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID,
gint32 orig_image_ID,
gboolean preview)
{
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
GimpImageType drawable_type;
GimpParasite *parasite;
struct jpeg_compress_struct cinfo;
struct my_error_mgr jerr;
FILE * volatile outfile;
guchar *temp, *t;
guchar *data;
guchar *src, *s;
gboolean has_alpha;
gint rowstride, yend;
gint i, j;
#ifdef HAVE_EXIF
guchar *thumbnail_buffer = NULL;
gint thumbnail_buffer_length = 0;
ExifData *exif_data_tmp = NULL;
#endif
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)
gimp_progress_init_printf (_("Saving '%s'"),
gimp_filename_to_utf8 (filename));
/* 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 = g_fopen (filename, "wb")) == NULL)
{
g_message (_("Could not open '%s' for writing: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
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:
/* # of color components per pixel (minus the GIMP alpha channel) */
cinfo.input_components = drawable->bpp - 1;
has_alpha = TRUE;
break;
case GIMP_INDEXED_IMAGE:
return FALSE;
default:
return FALSE;
}
/* 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 + 0.5), jsvals.baseline);
if (jsvals.use_orig_quality && num_quant_tables > 0)
{
guint **quant_tables;
gint t;
/* override tables generated by jpeg_set_quality() with custom tables */
quant_tables = jpeg_restore_original_tables (image_ID, num_quant_tables);
if (quant_tables)
{
for (t = 0; t < num_quant_tables; t++)
{
jpeg_add_quant_table (&cinfo, t, quant_tables[t],
100, jsvals.baseline);
g_free (quant_tables[t]);
}
g_free (quant_tables);
}
}
cinfo.optimize_coding = jsvals.optimize;
/* smoothing is not supported with nonstandard sampling ratios */
if (jsvals.subsmp != 1 && jsvals.subsmp != 3)
cinfo.smoothing_factor = (gint) (jsvals.smoothing * 100);
if (jsvals.progressive)
{
jpeg_simple_progression (&cinfo);
}
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;
case 3:
cinfo.comp_info[0].h_samp_factor = 1;
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;
}
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;
}
{
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;
}
}
/* 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);
#ifdef HAVE_EXIF
/* Create the thumbnail JPEG in a buffer */
if (jsvals.save_exif || jsvals.save_thumbnail)
{
guchar *exif_buf = NULL;
guint exif_buf_len;
gdouble quality = MIN (75.0, jsvals.quality);
if ( (! jsvals.save_exif) || (! exif_data))
exif_data_tmp = exif_data_new ();
else
exif_data_tmp = exif_data;
/* avoid saving markers longer than 65533, gradually decrease
* quality in steps of 5 until exif_buf_len is lower than that.
*/
for (exif_buf_len = 65535;
exif_buf_len > 65533 && quality > 0.0;
quality -= 5.0)
{
if (jsvals.save_thumbnail)
thumbnail_buffer_length = create_thumbnail (image_ID, drawable_ID,
quality,
&thumbnail_buffer);
exif_data_tmp->data = thumbnail_buffer;
exif_data_tmp->size = thumbnail_buffer_length;
if (exif_buf)
free (exif_buf);
exif_data_save_data (exif_data_tmp, &exif_buf, &exif_buf_len);
}
if (exif_buf_len > 65533)
{
/* last attempt with quality 0.0 */
if (jsvals.save_thumbnail)
thumbnail_buffer_length = create_thumbnail (image_ID, drawable_ID,
0.0,
&thumbnail_buffer);
exif_data_tmp->data = thumbnail_buffer;
exif_data_tmp->size = thumbnail_buffer_length;
if (exif_buf)
free (exif_buf);
exif_data_save_data (exif_data_tmp, &exif_buf, &exif_buf_len);
}
if (exif_buf_len > 65533)
{
/* still no go? save without thumbnail */
exif_data_tmp->data = NULL;
exif_data_tmp->size = 0;
if (exif_buf)
free (exif_buf);
exif_data_save_data (exif_data_tmp, &exif_buf, &exif_buf_len);
}
#ifdef GIMP_UNSTABLE
g_print ("jpeg-save: saving EXIF block (%d bytes)\n", exif_buf_len);
#endif
jpeg_write_marker (&cinfo, JPEG_APP0 + 1, exif_buf, exif_buf_len);
if (exif_buf)
free (exif_buf);
}
#endif /* HAVE_EXIF */
/* Step 4.1: Write the comment out - pw */
if (image_comment && *image_comment)
{
#ifdef GIMP_UNSTABLE
g_print ("jpeg-save: saving image comment (%d bytes)\n",
(int) strlen (image_comment));
#endif
jpeg_write_marker (&cinfo, JPEG_COM,
(guchar *) image_comment, strlen (image_comment));
}
/* Step 4.2: Write the XMP packet in an APP1 marker */
if (jsvals.save_xmp)
{
/* FIXME: temporary hack until the right thing is done by a library */
parasite = gimp_image_parasite_find (orig_image_ID, "gimp-metadata");
if (parasite)
{
const gchar *xmp_data;
glong xmp_data_size;
guchar *app_block;
xmp_data = ((const gchar *) gimp_parasite_data (parasite)) + 10;
xmp_data_size = gimp_parasite_data_size (parasite) - 10;
#ifdef GIMP_UNSTABLE
g_print ("jpeg-save: saving XMP packet (%d bytes)\n",
(int) xmp_data_size);
#endif
app_block = g_malloc (sizeof (JPEG_APP_HEADER_XMP) + xmp_data_size);
memcpy (app_block, JPEG_APP_HEADER_XMP,
sizeof (JPEG_APP_HEADER_XMP));
memcpy (app_block + sizeof (JPEG_APP_HEADER_XMP), xmp_data,
xmp_data_size);
jpeg_write_marker (&cinfo, JPEG_APP0 + 1, app_block,
sizeof (JPEG_APP_HEADER_XMP) + xmp_data_size);
g_free (app_block);
gimp_parasite_free (parasite);
}
}
/* Step 4.3: store the color profile if there is one */
parasite = gimp_image_parasite_find (orig_image_ID, "icc-profile");
if (parasite)
{
jpeg_icc_write_profile (&cinfo,
gimp_parasite_data (parasite),
gimp_parasite_data_size (parasite));
gimp_parasite_free (parasite);
}
/* 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);
pp->cinfo.err = jpeg_std_error(&(pp->jerr));
pp->jerr.error_exit = background_error_exit;
gtk_label_set_text (GTK_LABEL (preview_size),
_("Calculating file size..."));
g_idle_add ((GSourceFunc) background_jpeg_save, 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 % 32) == 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)
{
destroy_preview ();
if (jsvals.preview)
{
gchar *tn = gimp_temp_name ("jpeg");
if (! undo_touched)
{
/* we freeze undo saving so that we can avoid sucking up
* tile cache with our unneeded preview steps. */
gimp_image_undo_freeze (preview_image_ID);
undo_touched = TRUE;
}
save_image (tn,
preview_image_ID,
drawable_ID_global,
orig_image_ID_global,
TRUE);
if (display_ID == -1)
display_ID = gimp_display_new (preview_image_ID);
}
else
{
gtk_label_set_text (GTK_LABEL (preview_size), _("File size: unknown"));
gimp_displays_flush ();
}
}
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 (gimp_image_is_valid (preview_image_ID) &&
gimp_drawable_is_valid (preview_layer_ID))
{
/* 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 (preview_image_ID, preview_layer_ID);
preview_layer_ID = -1;
}
}
gboolean
save_dialog (void)
{
JpegSaveGui pg;
GtkWidget *dialog;
GtkWidget *vbox;
GtkObject *entry;
GtkWidget *table;
GtkWidget *table2;
GtkWidget *tabledefaults;
GtkWidget *expander;
GtkWidget *frame;
GtkWidget *toggle;
GtkWidget *spinbutton;
GtkWidget *label;
GtkWidget *combo;
GtkWidget *text_view;
GtkTextBuffer *text_buffer;
GtkWidget *scrolled_window;
GtkWidget *button;
GimpImageType dtype;
gchar *text;
dialog = gimp_dialog_new (_("Save as JPEG"), PLUG_IN_BINARY,
NULL, 0,
gimp_standard_help_func, SAVE_PROC,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_SAVE, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
g_signal_connect (dialog, "response",
G_CALLBACK (save_dialog_response),
&pg);
g_signal_connect (dialog, "destroy",
G_CALLBACK (gtk_main_quit),
NULL);
gtk_window_set_resizable (GTK_WINDOW (dialog), FALSE);
gimp_window_set_transient (GTK_WINDOW (dialog));
vbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
table = gtk_table_new (1, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);
gtk_widget_show (table);
pg.quality = entry = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
_("_Quality:"),
SCALE_WIDTH, 0, jsvals.quality,
0.0, 100.0, 1.0, 10.0, 0,
TRUE, 0.0, 0.0,
_("JPEG quality parameter"),
"file-jpeg-save-quality");
g_signal_connect (entry, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&jsvals.quality);
g_signal_connect (entry, "value-changed",
G_CALLBACK (make_preview),
NULL);
preview_size = gtk_label_new (_("File size: unknown"));
gtk_misc_set_alignment (GTK_MISC (preview_size), 0.0, 0.5);
gimp_label_set_attributes (GTK_LABEL (preview_size),
PANGO_ATTR_STYLE, PANGO_STYLE_ITALIC,
-1);
gtk_box_pack_start (GTK_BOX (vbox), preview_size, FALSE, FALSE, 0);
gtk_widget_show (preview_size);
gimp_help_set_help_data (preview_size,
_("Enable preview to obtain the file size."), NULL);
pg.preview = toggle =
gtk_check_button_new_with_mnemonic (_("Show _preview in image window"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), jsvals.preview);
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&jsvals.preview);
g_signal_connect (toggle, "toggled",
G_CALLBACK (make_preview),
NULL);
text = g_strdup_printf ("<b>%s</b>", _("_Advanced Options"));
expander = gtk_expander_new_with_mnemonic (text);
gtk_expander_set_use_markup (GTK_EXPANDER (expander), TRUE);
g_free (text);
gtk_box_pack_start (GTK_BOX (vbox), expander, TRUE, TRUE, 0);
gtk_widget_show (expander);
vbox = gtk_vbox_new (FALSE, 12);
gtk_container_add (GTK_CONTAINER (expander), vbox);
gtk_widget_show (vbox);
frame = gimp_frame_new ("<expander>");
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
table = gtk_table_new (4, 7, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_table_set_row_spacings (GTK_TABLE (table), 6);
gtk_table_set_col_spacing (GTK_TABLE (table), 1, 12);
gtk_container_add (GTK_CONTAINER (frame), table);
table2 = gtk_table_new (1, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table2), 6);
gtk_table_attach (GTK_TABLE (table), table2,
2, 6, 0, 1, GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (table2);
pg.smoothing = entry = gimp_scale_entry_new (GTK_TABLE (table2), 0, 0,
_("_Smoothing:"),
100, 0, jsvals.smoothing,
0.0, 1.0, 0.01, 0.1, 2,
TRUE, 0.0, 0.0,
NULL,
"file-jpeg-save-smoothing");
g_signal_connect (entry, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&jsvals.smoothing);
g_signal_connect (entry, "value-changed",
G_CALLBACK (make_preview),
NULL);
restart_markers_label = gtk_label_new (_("Frequency (rows):"));
gtk_misc_set_alignment (GTK_MISC (restart_markers_label), 1.0, 0.5);
gtk_table_attach (GTK_TABLE (table), restart_markers_label, 4, 5, 1, 2,
GTK_FILL | GTK_EXPAND, GTK_FILL, 0, 0);
gtk_widget_show (restart_markers_label);
/*pg.scale_data = scale_data;*/
pg.restart = restart_markers_scale = spinbutton =
gimp_spin_button_new (&pg.scale_data,
(jsvals.restart == 0) ? 1 : jsvals.restart,
1.0, 64.0, 1.0, 1.0, 64.0, 1.0, 0);
gtk_table_attach (GTK_TABLE (table), spinbutton, 5, 6, 1, 2,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (spinbutton);
pg.use_restart_markers = toggle =
gtk_check_button_new_with_label (_("Use restart markers"));
gtk_table_attach (GTK_TABLE (table), toggle, 2, 4, 1, 2, GTK_FILL, 0, 0, 0);
gtk_widget_show (toggle);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), jsvals.restart);
gtk_widget_set_sensitive (restart_markers_label, jsvals.restart);
gtk_widget_set_sensitive (restart_markers_scale, jsvals.restart);
g_signal_connect (pg.scale_data, "value-changed",
G_CALLBACK (save_restart_update),
toggle);
pg.handler_id_restart = g_signal_connect_swapped (toggle, "toggled",
G_CALLBACK (save_restart_update),
pg.scale_data);
pg.optimize = toggle = gtk_check_button_new_with_label (_("Optimize"));
gtk_table_attach (GTK_TABLE (table), toggle, 0, 1, 0, 1, GTK_FILL, 0, 0, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&jsvals.optimize);
g_signal_connect (toggle, "toggled",
G_CALLBACK (make_preview),
NULL);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), jsvals.optimize);
pg.progressive = toggle = gtk_check_button_new_with_label (_("Progressive"));
gtk_table_attach (GTK_TABLE (table), toggle, 0, 1, 1, 2, GTK_FILL, 0, 0, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&jsvals.progressive);
g_signal_connect (toggle, "toggled",
G_CALLBACK (make_preview),
NULL);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
jsvals.progressive);
#ifdef HAVE_EXIF
pg.save_exif = toggle = gtk_check_button_new_with_label (_("Save EXIF data"));
gtk_table_attach (GTK_TABLE (table), toggle, 0, 1, 2, 3, GTK_FILL, 0, 0, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&jsvals.save_exif);
g_signal_connect (toggle, "toggled",
G_CALLBACK (make_preview),
NULL);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
jsvals.save_exif && exif_data);
gtk_widget_set_sensitive (toggle, exif_data != NULL);
pg.save_thumbnail = toggle =
gtk_check_button_new_with_label (_("Save thumbnail"));
gtk_table_attach (GTK_TABLE (table), toggle, 0, 1, 3, 4, GTK_FILL, 0, 0, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&jsvals.save_thumbnail);
g_signal_connect (toggle, "toggled",
G_CALLBACK (make_preview),
NULL);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
jsvals.save_thumbnail);
#endif /* HAVE_EXIF */
/* XMP metadata */
pg.save_xmp = toggle = gtk_check_button_new_with_label (_("Save XMP data"));
gtk_table_attach (GTK_TABLE (table), toggle, 0, 1, 4, 5, GTK_FILL, 0, 0, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&jsvals.save_xmp);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
jsvals.save_xmp && has_metadata);
gtk_widget_set_sensitive (toggle, has_metadata);
/* custom quantization tables - now used also for original quality */
pg.use_orig_quality = toggle =
gtk_check_button_new_with_label (_("Use quality settings from original "
"image"));
gtk_table_attach (GTK_TABLE (table), toggle, 0, 4, 5, 6, GTK_FILL, 0, 0, 0);
gtk_widget_show (toggle);
gimp_help_set_help_data (toggle,
_("If the original image was loaded from a JPEG "
"file using non-standard quality settings "
"(quantization tables), enable this option to "
"get almost the same quality and file size."),
NULL);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&jsvals.use_orig_quality);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
jsvals.use_orig_quality
&& (orig_quality > 0));
gtk_widget_set_sensitive (toggle, (orig_quality > 0));
/* changing quality disables custom quantization tables, and vice-versa */
g_signal_connect (pg.quality, "value-changed",
G_CALLBACK (quality_changed),
pg.use_orig_quality);
g_signal_connect (pg.use_orig_quality, "toggled",
G_CALLBACK (use_orig_qual_changed),
pg.quality);
/* Subsampling */
label = gtk_label_new (_("Subsampling:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 2, 3, 2, 3,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (label);
pg.subsmp =
combo = gimp_int_combo_box_new (_("1x1,1x1,1x1 (best quality)"), 2,
_("2x1,1x1,1x1 (4:2:2)"), 1,
_("1x2,1x1,1x1"), 3,
_("2x2,1x1,1x1 (smallest file)"), 0,
NULL);
gtk_table_attach (GTK_TABLE (table), combo, 3, 6, 2, 3,
GTK_FILL | GTK_EXPAND, GTK_FILL, 0, 0);
gtk_widget_show (combo);
gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), jsvals.subsmp,
G_CALLBACK (subsampling_changed),
entry);
dtype = gimp_drawable_type (drawable_ID_global);
if (dtype == GIMP_RGB_IMAGE || dtype == GIMP_RGBA_IMAGE)
{
g_signal_connect (pg.use_orig_quality, "toggled",
G_CALLBACK (use_orig_qual_changed2),
pg.subsmp);
}
else
{
gtk_widget_set_sensitive (combo, FALSE);
}
/* DCT method */
label = gtk_label_new (_("DCT method:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 2, 3, 3, 4,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (label);
pg.dct = combo = gimp_int_combo_box_new (_("Fast Integer"), 1,
_("Integer"), 0,
_("Floating-Point"), 2,
NULL);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (combo), jsvals.dct);
gtk_table_attach (GTK_TABLE (table), combo, 3, 6, 3, 4,
GTK_FILL | GTK_EXPAND, GTK_FILL, 0, 0);
gtk_widget_show (combo);
g_signal_connect (combo, "changed",
G_CALLBACK (gimp_int_combo_box_get_active),
&jsvals.dct);
g_signal_connect (combo, "changed",
G_CALLBACK (make_preview),
NULL);
frame = gimp_frame_new (_("Comment"));
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
scrolled_window = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled_window),
GTK_SHADOW_IN);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
gtk_widget_set_size_request (scrolled_window, 250, 50);
gtk_container_add (GTK_CONTAINER (frame), scrolled_window);
gtk_widget_show (scrolled_window);
pg.text_buffer = text_buffer = gtk_text_buffer_new (NULL);
if (image_comment)
gtk_text_buffer_set_text (text_buffer, image_comment, -1);
text_view = gtk_text_view_new_with_buffer (text_buffer);
gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (text_view), GTK_WRAP_WORD);
gtk_container_add (GTK_CONTAINER (scrolled_window), text_view);
gtk_widget_show (text_view);
g_object_unref (text_buffer);
vbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
tabledefaults = gtk_table_new (1, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (tabledefaults), 6);
gtk_box_pack_start (GTK_BOX (vbox), tabledefaults, FALSE, FALSE, 0);
gtk_widget_show (tabledefaults);
button = gtk_button_new_with_mnemonic (_("_Load Defaults"));
gtk_table_attach (GTK_TABLE (tabledefaults),
button, 0, 1, 1, 2, GTK_FILL, 0, 0, 0);
gtk_widget_show (button);
g_signal_connect_swapped (button, "clicked",
G_CALLBACK (load_gui_defaults),
&pg);
button = gtk_button_new_with_mnemonic (_("S_ave Defaults"));
gtk_table_attach (GTK_TABLE (tabledefaults),
button, 1, 2, 1, 2, GTK_FILL, 0, 0, 0);
gtk_widget_show (button);
g_signal_connect_swapped (button, "clicked",
G_CALLBACK (save_defaults),
&pg);
gtk_widget_show (frame);
gtk_widget_show (table);
gtk_widget_show (dialog);
make_preview ();
pg.run = FALSE;
gtk_main ();
destroy_preview ();
return pg.run;
}
static void
save_dialog_response (GtkWidget *widget,
gint response_id,
gpointer data)
{
JpegSaveGui *pg = data;
GtkTextIter start_iter;
GtkTextIter end_iter;
switch (response_id)
{
case GTK_RESPONSE_OK:
gtk_text_buffer_get_bounds (pg->text_buffer, &start_iter, &end_iter);
image_comment = gtk_text_buffer_get_text (pg->text_buffer,
&start_iter, &end_iter, FALSE);
pg->run = TRUE;
/* fallthrough */
default:
gtk_widget_destroy (widget);
break;
}
}
void
load_save_defaults (void)
{
GimpParasite *parasite;
gchar *def_str;
JpegSaveVals tmpvals;
gint num_fields;
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;
jsvals.save_exif = DEFAULT_EXIF;
jsvals.save_thumbnail = DEFAULT_THUMBNAIL;
jsvals.save_xmp = DEFAULT_XMP;
jsvals.use_orig_quality = DEFAULT_USE_ORIG_QUALITY;
#ifdef HAVE_EXIF
if (exif_data && (exif_data->data))
jsvals.save_thumbnail = TRUE;
#endif /* HAVE_EXIF */
parasite = gimp_parasite_find (JPEG_DEFAULTS_PARASITE);
if (! parasite)
return;
def_str = g_strndup (gimp_parasite_data (parasite),
gimp_parasite_data_size (parasite));
gimp_parasite_free (parasite);
num_fields = sscanf (def_str, "%lf %lf %d %d %d %d %d %d %d %d %d %d",
&tmpvals.quality,
&tmpvals.smoothing,
&tmpvals.optimize,
&tmpvals.progressive,
&tmpvals.subsmp,
&tmpvals.baseline,
&tmpvals.restart,
&tmpvals.dct,
&tmpvals.preview,
&tmpvals.save_exif,
&tmpvals.save_thumbnail,
&tmpvals.save_xmp);
if (num_fields == 12)
memcpy (&jsvals, &tmpvals, sizeof (tmpvals));
}
static void
save_defaults (void)
{
GimpParasite *parasite;
gchar *def_str;
def_str = g_strdup_printf ("%lf %lf %d %d %d %d %d %d %d %d %d %d",
jsvals.quality,
jsvals.smoothing,
jsvals.optimize,
jsvals.progressive,
jsvals.subsmp,
jsvals.baseline,
jsvals.restart,
jsvals.dct,
jsvals.preview,
jsvals.save_exif,
jsvals.save_thumbnail,
jsvals.save_xmp);
parasite = gimp_parasite_new (JPEG_DEFAULTS_PARASITE,
GIMP_PARASITE_PERSISTENT,
strlen (def_str), def_str);
gimp_parasite_attach (parasite);
gimp_parasite_free (parasite);
g_free (def_str);
}
static void
load_gui_defaults (JpegSaveGui *pg)
{
GtkAdjustment *restart_markers;
load_save_defaults ();
#define SET_ACTIVE_BTTN(field) \
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (pg->field), jsvals.field)
SET_ACTIVE_BTTN (optimize);
SET_ACTIVE_BTTN (progressive);
SET_ACTIVE_BTTN (use_orig_quality);
SET_ACTIVE_BTTN (preview);
#ifdef HAVE_EXIF
SET_ACTIVE_BTTN (save_exif);
SET_ACTIVE_BTTN (save_thumbnail);
#endif
SET_ACTIVE_BTTN (save_xmp);
#undef SET_ACTIVE_BTTN
/*spin button stuff*/
g_signal_handler_block (pg->use_restart_markers, pg->handler_id_restart);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (pg->use_restart_markers),
jsvals.restart);
restart_markers = GTK_ADJUSTMENT (pg->scale_data);
gtk_adjustment_set_value (restart_markers, jsvals.restart);
g_signal_handler_unblock (pg->use_restart_markers, pg->handler_id_restart);
gtk_adjustment_set_value (GTK_ADJUSTMENT (pg->quality),
jsvals.quality);
gtk_adjustment_set_value (GTK_ADJUSTMENT (pg->smoothing),
jsvals.smoothing);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (pg->subsmp),
jsvals.subsmp);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (pg->dct),
jsvals.dct);
}
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);
gtk_widget_set_sensitive (restart_markers_scale, jsvals.restart);
make_preview ();
}
static void
subsampling_changed (GtkWidget *combo,
GtkObject *entry)
{
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (combo), &jsvals.subsmp);
/* smoothing is not supported with nonstandard sampling ratios */
gimp_scale_entry_set_sensitive (entry,
jsvals.subsmp != 1 && jsvals.subsmp != 3);
make_preview ();
}
static void
quality_changed (GtkObject *scale_entry,
GtkWidget *toggle)
{
if (jsvals.use_orig_quality)
{
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), FALSE);
}
}
static void
use_orig_qual_changed (GtkWidget *toggle,
GtkObject *scale_entry)
{
if (jsvals.use_orig_quality && orig_quality > 0)
{
g_signal_handlers_block_by_func (scale_entry, quality_changed, toggle);
gtk_adjustment_set_value (GTK_ADJUSTMENT (scale_entry), orig_quality);
g_signal_handlers_unblock_by_func (scale_entry, quality_changed, toggle);
}
}
static void
use_orig_qual_changed2 (GtkWidget *toggle,
GtkWidget *combo)
{
/* the test is (orig_quality > 0), not (orig_subsmp > 0) - this is normal */
if (jsvals.use_orig_quality && orig_quality > 0)
{
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (combo), orig_subsmp);
}
}
#ifdef HAVE_EXIF
static guchar *tbuffer = NULL;
static guchar *tbuffer2 = NULL;
static gint tbuffer_count = 0;
typedef struct
{
struct jpeg_destination_mgr pub; /* public fields */
guchar *buffer;
gint size;
} my_destination_mgr;
typedef my_destination_mgr *my_dest_ptr;
static void
init_destination (j_compress_ptr cinfo)
{
}
static gboolean
empty_output_buffer (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
tbuffer_count = tbuffer_count + 16384;
tbuffer = g_renew (guchar, tbuffer, tbuffer_count);
g_memmove (tbuffer + tbuffer_count - 16384, tbuffer2, 16384);
dest->pub.next_output_byte = tbuffer2;
dest->pub.free_in_buffer = 16384;
return TRUE;
}
static void
term_destination (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
tbuffer_count = (tbuffer_count + 16384) - (dest->pub.free_in_buffer);
tbuffer = g_renew (guchar, tbuffer, tbuffer_count);
g_memmove (tbuffer + tbuffer_count - (16384 - dest->pub.free_in_buffer),
tbuffer2, 16384 - dest->pub.free_in_buffer);
}
static gint
create_thumbnail (gint32 image_ID,
gint32 drawable_ID,
gdouble quality,
guchar **thumbnail_buffer)
{
GimpDrawable *drawable;
gint req_width, req_height, bpp, rbpp;
guchar *thumbnail_data = NULL;
struct jpeg_compress_struct cinfo;
struct my_error_mgr jerr;
my_dest_ptr dest;
gboolean alpha = FALSE;
JSAMPROW scanline[1];
guchar *buf = NULL;
gint i;
drawable = gimp_drawable_get (drawable_ID);
req_width = 196;
req_height = 196;
if (MIN (drawable->width, drawable->height) < 196)
req_width = req_height = MIN(drawable->width, drawable->height);
thumbnail_data = gimp_drawable_get_thumbnail_data (drawable_ID,
&req_width, &req_height,
&bpp);
if (! thumbnail_data)
return 0;
rbpp = bpp;
if ((bpp == 2) || (bpp == 4))
{
alpha = TRUE;
rbpp = bpp - 1;
}
buf = g_new (guchar, req_width * bpp);
tbuffer2 = g_new (guchar, 16384);
tbuffer_count = 0;
cinfo.err = jpeg_std_error (&jerr.pub);
jerr.pub.error_exit = my_error_exit;
/* 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, free memory, and return.
*/
jpeg_destroy_compress (&cinfo);
if (thumbnail_data)
{
g_free (thumbnail_data);
thumbnail_data = NULL;
}
if (buf)
{
g_free (buf);
buf = NULL;
}
if (tbuffer2)
{
g_free (tbuffer2);
tbuffer2 = NULL;
}
if (drawable)
gimp_drawable_detach (drawable);
return 0;
}
/* Now we can initialize the JPEG compression object. */
jpeg_create_compress (&cinfo);
if (cinfo.dest == NULL)
cinfo.dest = (struct jpeg_destination_mgr *)
(*cinfo.mem->alloc_small) ((j_common_ptr) &cinfo, JPOOL_PERMANENT,
sizeof(my_destination_mgr));
dest = (my_dest_ptr) cinfo.dest;
dest->pub.init_destination = init_destination;
dest->pub.empty_output_buffer = empty_output_buffer;
dest->pub.term_destination = term_destination;
dest->pub.next_output_byte = tbuffer2;
dest->pub.free_in_buffer = 16384;
dest->buffer = tbuffer2;
dest->size = 16384;
cinfo.input_components = rbpp;
cinfo.image_width = req_width;
cinfo.image_height = req_height;
/* colorspace of input image */
cinfo.in_color_space = (rbpp == 3) ? 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) (quality + 0.5), jsvals.baseline);
/* 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);
while (cinfo.next_scanline < (unsigned int) req_height)
{
for (i = 0; i < req_width; i++)
{
buf[(i * rbpp) + 0] = thumbnail_data[(cinfo.next_scanline * req_width * bpp) + (i * bpp) + 0];
if (rbpp == 3)
{
buf[(i * rbpp) + 1] = thumbnail_data[(cinfo.next_scanline * req_width * bpp) + (i * bpp) + 1];
buf[(i * rbpp) + 2] = thumbnail_data[(cinfo.next_scanline * req_width * bpp) + (i * bpp) + 2];
}
}
scanline[0] = buf;
jpeg_write_scanlines (&cinfo, scanline, 1);
}
/* Step 6: Finish compression */
jpeg_finish_compress (&cinfo);
/* Step 7: release JPEG compression object */
/* This is an important step since it will release a good deal of memory. */
jpeg_destroy_compress (&cinfo);
/* And we're done! */
if (thumbnail_data)
{
g_free (thumbnail_data);
thumbnail_data = NULL;
}
if (buf)
{
g_free (buf);
buf = NULL;
}
if (drawable)
{
gimp_drawable_detach (drawable);
drawable = NULL;
}
*thumbnail_buffer = tbuffer;
return tbuffer_count;
}
#endif /* HAVE_EXIF */
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