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PIKApp/app/dialogs/convert-indexed-dialog.c

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* 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 3 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, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libpikawidgets/pikawidgets.h"
#include "dialogs-types.h"
#include "core/pika.h"
#include "core/pikacontainer-filter.h"
#include "core/pikacontext.h"
#include "core/pikadatafactory.h"
#include "core/pikaimage.h"
#include "core/pikalist.h"
#include "core/pikapalette.h"
#include "widgets/pikahelp-ids.h"
#include "widgets/pikaviewablebox.h"
#include "widgets/pikaviewabledialog.h"
#include "widgets/pikawidgets-utils.h"
#include "convert-indexed-dialog.h"
#include "pika-intl.h"
typedef struct _IndexedDialog IndexedDialog;
struct _IndexedDialog
{
PikaImage *image;
PikaConvertPaletteType palette_type;
gint max_colors;
gboolean remove_duplicates;
PikaConvertDitherType dither_type;
gboolean dither_alpha;
gboolean dither_text_layers;
PikaPalette *custom_palette;
PikaConvertIndexedCallback callback;
gpointer user_data;
GtkWidget *dialog;
PikaContext *context;
PikaContainer *container;
GtkWidget *duplicates_toggle;
};
static void convert_dialog_free (IndexedDialog *private);
static void convert_dialog_response (GtkWidget *widget,
gint response_id,
IndexedDialog *private);
static GtkWidget * convert_dialog_palette_box (IndexedDialog *private);
static gboolean convert_dialog_palette_filter (PikaObject *object,
gpointer user_data);
static void convert_dialog_palette_changed (PikaContext *context,
PikaPalette *palette,
IndexedDialog *private);
static void convert_dialog_type_update (GtkWidget *widget,
IndexedDialog *private);
/* public functions */
GtkWidget *
convert_indexed_dialog_new (PikaImage *image,
PikaContext *context,
GtkWidget *parent,
PikaConvertPaletteType palette_type,
gint max_colors,
gboolean remove_duplicates,
PikaConvertDitherType dither_type,
gboolean dither_alpha,
gboolean dither_text_layers,
PikaPalette *custom_palette,
PikaConvertIndexedCallback callback,
gpointer user_data)
{
IndexedDialog *private;
GtkWidget *dialog;
GtkWidget *button;
GtkWidget *main_vbox;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *label;
GtkAdjustment *adjustment;
GtkWidget *spinbutton;
GtkWidget *frame;
GtkWidget *toggle;
GtkWidget *palette_box;
GtkWidget *combo;
g_return_val_if_fail (PIKA_IS_IMAGE (image), NULL);
g_return_val_if_fail (PIKA_IS_CONTEXT (context), NULL);
g_return_val_if_fail (GTK_IS_WIDGET (parent), NULL);
g_return_val_if_fail (custom_palette == NULL ||
PIKA_IS_PALETTE (custom_palette), NULL);
g_return_val_if_fail (callback != NULL, NULL);
private = g_slice_new0 (IndexedDialog);
private->image = image;
private->palette_type = palette_type;
private->max_colors = max_colors;
private->remove_duplicates = remove_duplicates;
private->dither_type = dither_type;
private->dither_alpha = dither_alpha;
private->dither_text_layers = dither_text_layers;
private->custom_palette = custom_palette;
private->callback = callback;
private->user_data = user_data;
private->dialog = dialog =
pika_viewable_dialog_new (g_list_prepend (NULL, image), context,
_("Indexed Color Conversion"),
"pika-image-convert-indexed",
PIKA_ICON_CONVERT_INDEXED,
_("Convert Image to Indexed Colors"),
parent,
pika_standard_help_func,
PIKA_HELP_IMAGE_CONVERT_INDEXED,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("C_onvert"), GTK_RESPONSE_OK,
NULL);
pika_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gtk_window_set_resizable (GTK_WINDOW (dialog), FALSE);
g_object_weak_ref (G_OBJECT (dialog),
(GWeakNotify) convert_dialog_free, private);
g_signal_connect (dialog, "response",
G_CALLBACK (convert_dialog_response),
private);
palette_box = convert_dialog_palette_box (private);
main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
main_vbox, TRUE, TRUE, 0);
gtk_widget_show (main_vbox);
/* palette */
frame =
pika_enum_radio_frame_new_with_range (PIKA_TYPE_CONVERT_PALETTE_TYPE,
PIKA_CONVERT_PALETTE_GENERATE,
(palette_box ?
PIKA_CONVERT_PALETTE_CUSTOM :
PIKA_CONVERT_PALETTE_MONO),
gtk_label_new (_("Colormap")),
G_CALLBACK (convert_dialog_type_update),
private, NULL,
&button);
pika_int_radio_group_set_active (GTK_RADIO_BUTTON (button),
private->palette_type);
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
/* max n_colors */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
pika_enum_radio_frame_add (GTK_FRAME (frame), hbox,
PIKA_CONVERT_PALETTE_GENERATE, TRUE);
gtk_widget_show (hbox);
label = gtk_label_new_with_mnemonic (_("_Maximum number of colors:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
if (private->max_colors == 256 && pika_image_has_alpha (image))
private->max_colors = 255;
adjustment = gtk_adjustment_new (private->max_colors, 2, 256, 1, 8, 0);
spinbutton = pika_spin_button_new (adjustment, 1.0, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), spinbutton);
gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
g_signal_connect (adjustment, "value-changed",
G_CALLBACK (pika_int_adjustment_update),
&private->max_colors);
/* custom palette */
if (palette_box)
{
pika_enum_radio_frame_add (GTK_FRAME (frame), palette_box,
PIKA_CONVERT_PALETTE_CUSTOM, TRUE);
gtk_widget_show (palette_box);
}
vbox = gtk_bin_get_child (GTK_BIN (frame));
private->duplicates_toggle = toggle =
gtk_check_button_new_with_mnemonic (_("_Remove unused and duplicate "
"colors from colormap"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
private->remove_duplicates);
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 3);
gtk_widget_show (toggle);
if (private->palette_type == PIKA_CONVERT_PALETTE_GENERATE ||
private->palette_type == PIKA_CONVERT_PALETTE_MONO)
gtk_widget_set_sensitive (toggle, FALSE);
g_signal_connect (toggle, "toggled",
G_CALLBACK (pika_toggle_button_update),
&private->remove_duplicates);
/* dithering */
frame = pika_frame_new (_("Dithering"));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
label = gtk_label_new_with_mnemonic (_("Color _dithering:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
combo = pika_enum_combo_box_new (PIKA_TYPE_CONVERT_DITHER_TYPE);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), combo);
gtk_box_pack_start (GTK_BOX (hbox), combo, TRUE, TRUE, 0);
gtk_widget_show (combo);
pika_int_combo_box_connect (PIKA_INT_COMBO_BOX (combo),
private->dither_type,
G_CALLBACK (pika_int_combo_box_get_active),
&private->dither_type, NULL);
toggle =
gtk_check_button_new_with_mnemonic (_("Enable dithering of _transparency"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
private->dither_alpha);
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (pika_toggle_button_update),
&private->dither_alpha);
toggle =
gtk_check_button_new_with_mnemonic (_("Enable dithering of text _layers"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
private->dither_text_layers);
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (pika_toggle_button_update),
&private->dither_text_layers);
pika_help_set_help_data (toggle,
_("Dithering text layers will make them uneditable"),
NULL);
return dialog;
}
/* private functions */
static void
convert_dialog_free (IndexedDialog *private)
{
if (private->container)
g_object_unref (private->container);
if (private->context)
g_object_unref (private->context);
g_slice_free (IndexedDialog, private);
}
static void
convert_dialog_response (GtkWidget *dialog,
gint response_id,
IndexedDialog *private)
{
if (response_id == GTK_RESPONSE_OK)
{
private->callback (dialog,
private->image,
private->palette_type,
private->max_colors,
private->remove_duplicates,
private->dither_type,
private->dither_alpha,
private->dither_text_layers,
private->custom_palette,
private->user_data);
}
else
{
gtk_widget_destroy (dialog);
}
}
static GtkWidget *
convert_dialog_palette_box (IndexedDialog *private)
{
Pika *pika = private->image->pika;
GList *list;
PikaPalette *web_palette = NULL;
gboolean custom_found = FALSE;
/* We can't dither to > 256 colors */
private->container =
pika_container_filter (pika_data_factory_get_container (pika->palette_factory),
convert_dialog_palette_filter,
NULL);
if (pika_container_is_empty (private->container))
{
g_object_unref (private->container);
private->container = NULL;
return NULL;
}
private->context = pika_context_new (pika, "convert-dialog", NULL);
for (list = PIKA_LIST (private->container)->queue->head;
list;
list = g_list_next (list))
{
PikaPalette *palette = list->data;
/* Preferentially, the initial default is 'Web' if available */
if (web_palette == NULL &&
g_ascii_strcasecmp (pika_object_get_name (palette), "Web") == 0)
{
web_palette = palette;
}
if (private->custom_palette == palette)
custom_found = TRUE;
}
if (! custom_found)
{
if (web_palette)
private->custom_palette = web_palette;
else
private->custom_palette = PIKA_LIST (private->container)->queue->head->data;
}
pika_context_set_palette (private->context, private->custom_palette);
g_signal_connect (private->context, "palette-changed",
G_CALLBACK (convert_dialog_palette_changed),
private);
return pika_palette_box_new (private->container, private->context, NULL, 4);
}
static gboolean
convert_dialog_palette_filter (PikaObject *object,
gpointer user_data)
{
PikaPalette *palette = PIKA_PALETTE (object);
return (pika_palette_get_n_colors (palette) > 0 &&
pika_palette_get_n_colors (palette) <= 256);
}
static void
convert_dialog_palette_changed (PikaContext *context,
PikaPalette *palette,
IndexedDialog *private)
{
if (! palette)
return;
if (pika_palette_get_n_colors (palette) > 256)
{
pika_message (private->image->pika, G_OBJECT (private->dialog),
PIKA_MESSAGE_WARNING,
_("Cannot convert to a palette "
"with more than 256 colors."));
}
else
{
private->custom_palette = palette;
}
}
static void
convert_dialog_type_update (GtkWidget *widget,
IndexedDialog *private)
{
pika_radio_button_update (widget, &private->palette_type);
if (private->duplicates_toggle)
gtk_widget_set_sensitive (private->duplicates_toggle,
private->palette_type !=
PIKA_CONVERT_PALETTE_GENERATE &&
private->palette_type !=
PIKA_CONVERT_PALETTE_MONO);
}
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