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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/gimpcontainer-filter.h"
#include "core/gimpcontext.h"
#include "core/gimpdatafactory.h"
#include "core/gimpimage.h"
#include "core/gimpimage-convert.h"
#include "core/gimplist.h"
#include "core/gimppalette.h"
#include "core/gimpprogress.h"
#include "widgets/gimpcontainerentry.h"
#include "widgets/gimpdialogfactory.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimpviewablebutton.h"
#include "widgets/gimpviewabledialog.h"
#include "gimp-intl.h"
typedef struct
{
GimpImage *gimage;
GimpProgress *progress;
GtkWidget *shell;
GimpContext *context;
GimpContainer *container;
GimpPalette *custom_palette;
gboolean have_web_palette;
GimpConvertDitherType dither_type;
gboolean alpha_dither;
gboolean remove_dups;
gint num_colors;
GimpConvertPaletteType palette_type;
} IndexedDialog;
static void convert_dialog_response (GtkWidget *widget,
gint response_id,
IndexedDialog *dialog);
static GtkWidget * convert_dialog_palette_box (IndexedDialog *dialog);
static gboolean convert_dialog_palette_filter (const GimpObject *object,
gpointer user_data);
static void convert_dialog_palette_changed (GimpContext *context,
GimpPalette *palette,
IndexedDialog *dialog);
/* 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;
static GimpPalette *saved_palette = NULL;
/* public functions */
GtkWidget *
convert_dialog_new (GimpImage *gimage,
GtkWidget *parent,
GimpProgress *progress)
{
IndexedDialog *dialog;
GtkWidget *main_vbox;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *label;
GtkObject *adjustment;
GtkWidget *spinbutton;
GtkWidget *frame;
GtkWidget *toggle;
GtkWidget *palette_box;
GSList *group = NULL;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
g_return_val_if_fail (GTK_IS_WIDGET (parent), NULL);
g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
dialog = g_new0 (IndexedDialog, 1);
dialog->gimage = gimage;
dialog->progress = progress;
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 (convert_dialog_response),
dialog);
g_object_weak_ref (G_OBJECT (dialog->shell),
(GWeakNotify) g_free,
dialog);
palette_box = convert_dialog_palette_box (dialog);
if (dialog->context)
g_object_weak_ref (G_OBJECT (dialog->shell),
(GWeakNotify) g_object_unref,
dialog->context);
if (dialog->container)
g_object_weak_ref (G_OBJECT (dialog->shell),
(GWeakNotify) g_object_unref,
dialog->container);
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 (! dialog->have_web_palette)
{
/* '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 (palette_box)
{
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);
gtk_box_pack_end (GTK_BOX (hbox), palette_box, TRUE, TRUE, 0);
gtk_widget_show (palette_box);
gtk_widget_set_sensitive (remove_toggle,
dialog->palette_type == GIMP_CUSTOM_PALETTE);
gtk_widget_set_sensitive (palette_box,
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",
palette_box);
/* 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;
}
/* private functions */
static void
convert_dialog_response (GtkWidget *widget,
gint response_id,
IndexedDialog *dialog)
{
if (response_id == GTK_RESPONSE_OK)
{
GimpProgress *progress;
progress = gimp_progress_start (dialog->progress,
_("Converting to indexed..."), FALSE);
/* 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,
dialog->custom_palette,
progress);
if (progress)
gimp_progress_end (progress);
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;
saved_palette = dialog->custom_palette;
}
gtk_widget_destroy (dialog->shell);
}
static GtkWidget *
convert_dialog_palette_box (IndexedDialog *dialog)
{
Gimp *gimp;
GList *list;
GimpPalette *palette;
GimpPalette *web_palette = NULL;
gboolean default_found = FALSE;
gimp = dialog->gimage->gimp;
dialog->have_web_palette = FALSE;
/* We can't dither to > 256 colors */
dialog->container = gimp_container_filter (gimp->palette_factory->container,
convert_dialog_palette_filter,
NULL);
if (! gimp_container_num_children (dialog->container))
{
g_object_unref (dialog->container);
return NULL;
}
dialog->context = gimp_context_new (gimp, "convert-dialog", NULL);
for (list = GIMP_LIST (dialog->container)->list;
list;
list = g_list_next (list))
{
palette = (GimpPalette *) list->data;
/* Preferentially, the initial default is 'Web' if available */
if (web_palette == NULL &&
g_ascii_strcasecmp (GIMP_OBJECT (palette)->name, "Web") == 0)
{
web_palette = palette;
dialog->have_web_palette = TRUE;
}
if (saved_palette == palette)
{
dialog->custom_palette = saved_palette;
default_found = TRUE;
}
}
if (! default_found)
{
if (web_palette)
dialog->custom_palette = web_palette;
else
dialog->custom_palette = GIMP_LIST (dialog->container)->list->data;
}
gimp_context_set_palette (dialog->context, dialog->custom_palette);
g_signal_connect (dialog->context, "palette-changed",
G_CALLBACK (convert_dialog_palette_changed),
dialog);
{
GtkWidget *hbox;
GtkWidget *button;
GtkWidget *entry;
hbox = gtk_hbox_new (FALSE, 4);
button = gimp_viewable_button_new (dialog->container,
dialog->context,
GIMP_VIEW_SIZE_MEDIUM, 1,
gimp_dialog_factory_from_name ("dock"),
"gimp-palette-list|gimp-palette-grid",
GIMP_STOCK_PALETTE,
_("Open the palette selection dialog"));
gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
entry = gimp_container_entry_new (dialog->container,
dialog->context,
GIMP_VIEW_SIZE_MEDIUM, 1);
gtk_box_pack_start (GTK_BOX (hbox), entry, TRUE, TRUE, 0);
gtk_widget_show (entry);
return hbox;
}
}
static gboolean
convert_dialog_palette_filter (const GimpObject *object,
gpointer user_data)
{
return GIMP_PALETTE (object)->n_colors <= 256;
}
static void
convert_dialog_palette_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
{
dialog->custom_palette = palette;
}
}
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