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gimp/app/dialogs/convert-dialog.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "gui-types.h"
#include "core/gimp.h"
#include "core/gimpdatafactory.h"
#include "core/gimpimage.h"
#include "core/gimpimage-convert.h"
#include "core/gimplist.h"
#include "core/gimppalette.h"
#include "widgets/gimpenumwidgets.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimppaletteselect.h"
#include "widgets/gimpviewabledialog.h"
#include "menus/menus.h"
#include "gimp-intl.h"
typedef struct
{
GtkWidget *shell;
GtkWidget *custom_palette_button;
GimpImage *gimage;
GimpPdbDialog *palette_select;
GimpConvertDitherType dither_type;
gboolean alpha_dither;
gboolean remove_dups;
gint num_colors;
gint palette;
GimpConvertPaletteType palette_type;
} IndexedDialog;
static void indexed_response (GtkWidget *widget,
gint response_id,
IndexedDialog *dialog);
static void indexed_destroy (GtkWidget *widget,
IndexedDialog *dialog);
static void indexed_custom_palette_button_callback (GtkWidget *widget,
IndexedDialog *dialog);
static void indexed_palette_select_destroy (GtkWidget *widget,
IndexedDialog *dialog);
static void indexed_palette_select_changed (GimpContext *context,
GimpPalette *palette,
IndexedDialog *dialog);
static GtkWidget * build_palette_button (Gimp *gimp);
static gboolean UserHasWebPal = FALSE;
static GimpPalette *theCustomPalette = NULL;
/* Defaults */
static GimpConvertDitherType saved_dither_type = GIMP_FS_DITHER;
static gboolean saved_alpha_dither = FALSE;
static gboolean saved_remove_dups = TRUE;
static gint saved_num_colors = 256;
static GimpConvertPaletteType saved_palette_type = GIMP_MAKE_PALETTE;
GtkWidget *
convert_dialog_new (GimpImage *gimage,
GtkWidget *parent)
{
IndexedDialog *dialog;
GtkWidget *main_vbox;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *label;
GtkObject *adjustment;
GtkWidget *spinbutton;
GtkWidget *frame;
GtkWidget *toggle;
GSList *group = NULL;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
g_return_val_if_fail (GTK_IS_WIDGET (parent), NULL);
dialog = g_new0 (IndexedDialog, 1);
dialog->gimage = gimage;
dialog->custom_palette_button = build_palette_button (gimage->gimp);
dialog->dither_type = saved_dither_type;
dialog->alpha_dither = saved_alpha_dither;
dialog->remove_dups = saved_remove_dups;
dialog->num_colors = saved_num_colors;
dialog->palette_type = saved_palette_type;
dialog->shell =
gimp_viewable_dialog_new (GIMP_VIEWABLE (gimage),
_("Indexed Color Conversion"),
"gimp-image-convert-indexed",
GIMP_STOCK_CONVERT_INDEXED,
_("Convert Image to Indexed Colors"),
parent,
gimp_standard_help_func,
GIMP_HELP_IMAGE_CONVERT_INDEXED,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
g_signal_connect (dialog->shell, "response",
G_CALLBACK (indexed_response),
dialog);
g_signal_connect (dialog->shell, "destroy",
G_CALLBACK (indexed_destroy),
dialog);
main_vbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog->shell)->vbox),
main_vbox);
gtk_widget_show (main_vbox);
frame = gimp_frame_new (_("General Palette Options"));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
vbox = gtk_vbox_new (FALSE, 2);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
/* 'generate palette' */
hbox = gtk_hbox_new (FALSE, 6);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
toggle = gtk_radio_button_new_with_label (NULL,
_("Generate optimum palette:"));
group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (hbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_object_set_data (G_OBJECT (toggle), "gimp-item-data",
GINT_TO_POINTER (GIMP_MAKE_PALETTE));
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_radio_button_update),
&dialog->palette_type);
if (dialog->num_colors == 256 && gimp_image_has_alpha (gimage))
{
dialog->num_colors = 255;
}
spinbutton = gimp_spin_button_new (&adjustment, dialog->num_colors,
2, 256, 1, 8, 0, 1, 0);
gtk_box_pack_end (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
g_signal_connect (adjustment, "value_changed",
G_CALLBACK (gimp_int_adjustment_update),
&dialog->num_colors);
label = gtk_label_new (_("Max. number of colors:"));
gtk_box_pack_end (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
gtk_widget_set_sensitive (GTK_WIDGET (spinbutton), dialog->num_colors);
gtk_widget_set_sensitive (GTK_WIDGET (label), dialog->num_colors);
g_object_set_data (G_OBJECT (toggle), "set_sensitive", spinbutton);
g_object_set_data (G_OBJECT (spinbutton), "set_sensitive", label);
gtk_widget_show (hbox);
if (! UserHasWebPal)
{
/* 'web palette'
* Only presented as an option to the user if they do not
* already have the 'Web' GIMP palette installed on their
* system.
*/
toggle = gtk_radio_button_new_with_label (group,
_("Use WWW-Optimized Palette"));
group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_object_set_data (G_OBJECT (toggle), "gimp-item-data",
GINT_TO_POINTER (GIMP_WEB_PALETTE));
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_radio_button_update),
&dialog->palette_type);
}
/* 'mono palette' */
toggle = gtk_radio_button_new_with_label (group,
_("Use black and white (1-bit) palette"));
group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_object_set_data (G_OBJECT (toggle), "gimp-item-data",
GINT_TO_POINTER (GIMP_MONO_PALETTE));
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_radio_button_update),
&dialog->palette_type);
/* 'custom' palette from dialog */
if (dialog->custom_palette_button)
{
GtkWidget *remove_toggle;
remove_toggle = gtk_check_button_new_with_label (_("Remove unused colors from final palette"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (remove_toggle),
dialog->remove_dups);
g_signal_connect (remove_toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&dialog->remove_dups);
/* 'custom' palette from dialog */
hbox = gtk_hbox_new (FALSE, 6);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
toggle = gtk_radio_button_new_with_label (group,
_("Use custom palette:"));
group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (hbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_object_set_data (G_OBJECT (toggle), "gimp-item-data",
GINT_TO_POINTER (GIMP_CUSTOM_PALETTE));
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_radio_button_update),
&dialog->palette_type);
g_object_set_data (G_OBJECT (toggle), "set_sensitive", remove_toggle);
g_signal_connect (dialog->custom_palette_button, "clicked",
G_CALLBACK (indexed_custom_palette_button_callback),
dialog);
gtk_box_pack_end (GTK_BOX (hbox),
dialog->custom_palette_button, TRUE, TRUE, 0);
gtk_widget_show (dialog->custom_palette_button);
gtk_widget_set_sensitive (remove_toggle,
dialog->palette_type == GIMP_CUSTOM_PALETTE);
gtk_widget_set_sensitive (dialog->custom_palette_button,
dialog->palette_type == GIMP_CUSTOM_PALETTE);
g_object_set_data (G_OBJECT (toggle), "set_sensitive", remove_toggle);
g_object_set_data (G_OBJECT (remove_toggle), "set_sensitive",
dialog->custom_palette_button);
/* add the remove-duplicates toggle */
hbox = gtk_hbox_new (FALSE, 6);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
gtk_box_pack_start (GTK_BOX (hbox), remove_toggle, TRUE, TRUE, 20);
gtk_widget_show (remove_toggle);
}
gimp_int_radio_group_set_active (GTK_RADIO_BUTTON (toggle),
dialog->palette_type);
/* the dither type */
frame = gimp_frame_new (_("Dithering Options"));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
vbox = gimp_enum_radio_box_new (GIMP_TYPE_CONVERT_DITHER_TYPE,
G_CALLBACK (gimp_radio_button_update),
&dialog->dither_type,
&toggle);
gimp_int_radio_group_set_active (GTK_RADIO_BUTTON (toggle),
dialog->dither_type);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 2);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show(vbox);
/* the alpha-dither toggle */
toggle =
gtk_check_button_new_with_label (_("Enable dithering of transparency"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
dialog->alpha_dither);
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),
&dialog->alpha_dither);
/* if the image isn't non-alpha/layered, set the default number of
colours to one less than max, to leave room for a transparent index
for transparent/animated GIFs */
if (gimp_image_has_alpha (gimage))
{
frame = gimp_frame_new (_("[ Warning ]"));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
label = gtk_label_new
(_("You are attempting to convert an image with an alpha channel "
"to indexed colors.\n"
"Do not generate a palette of more than 255 colors if you "
"intend to create a transparent or animated GIF file."));
gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
gtk_container_add (GTK_CONTAINER (frame), label);
gtk_widget_show (label);
}
return dialog->shell;
}
static GtkWidget *
build_palette_button (Gimp *gimp)
{
GList *list;
GimpPalette *palette;
GimpPalette *theWebPalette = NULL;
gint i;
gint default_palette;
UserHasWebPal = FALSE;
list = GIMP_LIST (gimp->palette_factory->container)->list;
if (! list)
{
return NULL;
}
for (i = 0, default_palette = -1;
list;
i++, list = g_list_next (list))
{
palette = (GimpPalette *) list->data;
/* Preferentially, the initial default is 'Web' if available */
if (theWebPalette == NULL &&
g_ascii_strcasecmp (GIMP_OBJECT (palette)->name, "Web") == 0)
{
theWebPalette = palette;
UserHasWebPal = TRUE;
}
/* We can't dither to > 256 colors */
if (palette->n_colors <= 256)
{
if (theCustomPalette == palette)
{
default_palette = i;
}
}
}
/* default to first one with <= 256 colors
* (only used if 'web' palette not available)
*/
if (default_palette == -1)
{
if (theWebPalette)
{
theCustomPalette = theWebPalette;
default_palette = 1; /* dummy value */
}
else
{
for (i = 0, list = GIMP_LIST (gimp->palette_factory->container)->list;
list && default_palette == -1;
i++, list = g_list_next (list))
{
palette = (GimpPalette *) list->data;
if (palette->n_colors <= 256)
{
theCustomPalette = palette;
default_palette = i;
}
}
}
}
if (default_palette == -1)
return NULL;
else
return gtk_button_new_with_label (GIMP_OBJECT (theCustomPalette)->name);
}
static void
indexed_response (GtkWidget *widget,
gint response_id,
IndexedDialog *dialog)
{
if (response_id == GTK_RESPONSE_OK)
{
/* Convert the image to indexed color */
gimp_image_convert (dialog->gimage,
GIMP_INDEXED,
dialog->num_colors,
dialog->dither_type,
dialog->alpha_dither,
dialog->remove_dups,
dialog->palette_type,
theCustomPalette);
gimp_image_flush (dialog->gimage);
/* Save defaults for next time */
saved_dither_type = dialog->dither_type;
saved_alpha_dither = dialog->alpha_dither;
saved_remove_dups = dialog->remove_dups;
saved_num_colors = dialog->num_colors;
saved_palette_type = dialog->palette_type;
}
gtk_widget_destroy (dialog->shell);
}
static void
indexed_destroy (GtkWidget *widget,
IndexedDialog *dialog)
{
if (dialog->palette_select)
gtk_widget_destroy (GTK_WIDGET (dialog->palette_select));
g_free (dialog);
}
static void
indexed_custom_palette_button_callback (GtkWidget *widget,
IndexedDialog *dialog)
{
if (! dialog->palette_select)
{
dialog->palette_select =
g_object_new (GIMP_TYPE_PALETTE_SELECT,
"title", _("Select Custom Palette"),
"role", "gimp-pelette-selection",
"help-func", gimp_standard_help_func,
"help_id", GIMP_HELP_PALETTE_DIALOG,
"context", gimp_get_user_context (dialog->gimage->gimp),
"select-type", GIMP_TYPE_PALETTE,
"initial-object", theCustomPalette,
"menu-factory", global_menu_factory,
NULL);
g_signal_connect (dialog->palette_select, "destroy",
G_CALLBACK (indexed_palette_select_destroy),
dialog);
g_signal_connect (dialog->palette_select->context, "palette_changed",
G_CALLBACK (indexed_palette_select_changed),
dialog);
}
gtk_window_present (GTK_WINDOW (dialog->palette_select));
}
static void
indexed_palette_select_destroy (GtkWidget *widget,
IndexedDialog *dialog)
{
dialog->palette_select = NULL;
}
static void
indexed_palette_select_changed (GimpContext *context,
GimpPalette *palette,
IndexedDialog *dialog)
{
if (! palette)
return;
if (palette->n_colors > 256)
{
g_message (_("Cannot convert to a palette with more than 256 colors."));
}
else
{
theCustomPalette = palette;
gtk_label_set_text (GTK_LABEL (GTK_BIN (dialog->custom_palette_button)->child),
gimp_object_get_name (GIMP_OBJECT (palette)));
}
}
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