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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 <glib.h>
-
- #include "apptypes.h"
-
- #include "appenv.h"
- #include "drawable.h"
- #include "gdisplay.h"
- #include "image_map.h"
- #include "posterize.h"
- #include "gimplut.h"
- #include "gimpui.h"
- #include "lut_funcs.h"
-
- #include "libgimp/gimpintl.h"
-
-
- /* the posterize structures */
-
- typedef struct _Posterize Posterize;
-
- struct _Posterize
- {
- gint x, y; /* coords for last mouse click */
- };
-
- typedef struct _PosterizeDialog PosterizeDialog;
-
- struct _PosterizeDialog
- {
- GtkWidget *shell;
-
- GtkAdjustment *levels_data;
-
- GimpDrawable *drawable;
- ImageMap image_map;
-
- gint levels;
-
- gboolean preview;
-
- GimpLut *lut;
- };
-
- /* the posterize tool options */
- static ToolOptions *posterize_options = NULL;
-
- /* the posterize tool dialog */
- static PosterizeDialog *posterize_dialog = NULL;
-
-
- /* posterize action functions */
- static void posterize_control (Tool *, ToolAction, gpointer);
-
- static PosterizeDialog * posterize_dialog_new (void);
-
- static void posterize_preview (PosterizeDialog *);
- static void posterize_reset_callback (GtkWidget *, gpointer);
- static void posterize_ok_callback (GtkWidget *, gpointer);
- static void posterize_cancel_callback (GtkWidget *, gpointer);
- static void posterize_preview_update (GtkWidget *, gpointer);
- static void posterize_levels_adjustment_update (GtkAdjustment *, gpointer);
-
- /* posterize select action functions */
-
- static void
- posterize_control (Tool *tool,
- ToolAction action,
- gpointer gdisp_ptr)
- {
- switch (action)
- {
- case PAUSE:
- break;
-
- case RESUME:
- break;
-
- case HALT:
- posterize_dialog_hide ();
- break;
-
- default:
- break;
- }
- }
-
- Tool *
- tools_new_posterize (void)
- {
- Tool * tool;
- Posterize * private;
-
- /* The tool options */
- if (! posterize_options)
- {
- posterize_options = tool_options_new (("Posterize"));
- tools_register (POSTERIZE, posterize_options);
- }
-
- tool = tools_new_tool (POSTERIZE);
- private = g_new0 (Posterize, 1);
-
- tool->scroll_lock = TRUE; /* Disallow scrolling */
- tool->preserve = FALSE; /* Don't preserve on drawable change */
-
- tool->private = (void *) private;
-
- tool->control_func = posterize_control;
-
- return tool;
- }
-
- void
- posterize_dialog_hide (void)
- {
- if (posterize_dialog)
- posterize_cancel_callback (NULL, (gpointer) posterize_dialog);
- }
-
- void
- tools_free_posterize (Tool *tool)
- {
- Posterize * post;
-
- post = (Posterize *) tool->private;
-
- /* Close the posterize dialog */
- posterize_dialog_hide ();
-
- g_free (post);
- }
-
- void
- posterize_initialize (GDisplay *gdisp)
- {
- if (drawable_indexed (gimage_active_drawable (gdisp->gimage)))
- {
- g_message (_("Posterize does not operate on indexed drawables."));
- return;
- }
-
- /* The posterize dialog */
- if (!posterize_dialog)
- posterize_dialog = posterize_dialog_new ();
- else
- if (!GTK_WIDGET_VISIBLE (posterize_dialog->shell))
- gtk_widget_show (posterize_dialog->shell);
-
- posterize_dialog->levels = 3;
-
- posterize_dialog->drawable = gimage_active_drawable (gdisp->gimage);
- posterize_dialog->image_map =
- image_map_create (gdisp, posterize_dialog->drawable);
-
- gtk_adjustment_set_value (GTK_ADJUSTMENT (posterize_dialog->levels_data), 3);
-
- if (posterize_dialog->preview)
- posterize_preview (posterize_dialog);
- }
-
- /**********************/
- /* Posterize dialog */
- /**********************/
-
- static PosterizeDialog *
- posterize_dialog_new (void)
- {
- PosterizeDialog *pd;
- GtkWidget *vbox;
- GtkWidget *hbox;
- GtkWidget *label;
- GtkWidget *spinbutton;
- GtkWidget *toggle;
- GtkObject *data;
-
- pd = g_new (PosterizeDialog, 1);
- pd->preview = TRUE;
- pd->levels = 3;
- pd->lut = gimp_lut_new ();
-
- /* The shell and main vbox */
- pd->shell =
- gimp_dialog_new (_("Posterize"), "posterize",
- tools_help_func, NULL,
- GTK_WIN_POS_NONE,
- FALSE, TRUE, FALSE,
-
- _("OK"), posterize_ok_callback,
- pd, NULL, NULL, TRUE, FALSE,
- _("Reset"), posterize_reset_callback,
- pd, NULL, NULL, TRUE, FALSE,
- _("Cancel"), posterize_cancel_callback,
- pd, NULL, NULL, FALSE, TRUE,
-
- NULL);
-
- vbox = gtk_vbox_new (FALSE, 2);
- gtk_container_set_border_width (GTK_CONTAINER (vbox), 4);
- gtk_container_add (GTK_CONTAINER (GTK_DIALOG (pd->shell)->vbox), vbox);
-
- /* Horizontal box for levels text widget */
- hbox = gtk_hbox_new (FALSE, 4);
- gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
-
- label = gtk_label_new (_("Posterize Levels:"));
- gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
- gtk_widget_show (label);
-
- /* levels spinbutton */
- data = gtk_adjustment_new (3, 2, 256, 1.0, 10.0, 0.0);
- pd->levels_data = GTK_ADJUSTMENT (data);
-
- spinbutton = gtk_spin_button_new (pd->levels_data, 1.0, 0);
- gtk_widget_set_usize (spinbutton, 75, -1);
- gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
-
- gtk_signal_connect (GTK_OBJECT (pd->levels_data), "value_changed",
- GTK_SIGNAL_FUNC (posterize_levels_adjustment_update),
- pd);
-
- gtk_widget_show (spinbutton);
- gtk_widget_show (hbox);
-
- /* Horizontal box for preview */
- hbox = gtk_hbox_new (FALSE, 4);
- gtk_box_pack_end (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
-
- /* The preview toggle */
- toggle = gtk_check_button_new_with_label (_("Preview"));
- gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), pd->preview);
- gtk_box_pack_end (GTK_BOX (hbox), toggle, FALSE, FALSE, 0);
-
- gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
- GTK_SIGNAL_FUNC (posterize_preview_update),
- pd);
-
- gtk_widget_show (label);
- gtk_widget_show (toggle);
- gtk_widget_show (hbox);
-
- gtk_widget_show (vbox);
- gtk_widget_show (pd->shell);
-
- return pd;
- }
-
- static void
- posterize_preview (PosterizeDialog *pd)
- {
- if (!pd->image_map)
- {
- g_warning ("posterize_preview(): No image map");
- return;
- }
-
- active_tool->preserve = TRUE;
- posterize_lut_setup (pd->lut, pd->levels, gimp_drawable_bytes(pd->drawable));
- image_map_apply (pd->image_map, (ImageMapApplyFunc) gimp_lut_process_2,
- (void *) pd->lut);
- active_tool->preserve = FALSE;
- }
-
- static void
- posterize_reset_callback (GtkWidget *widget,
- gpointer data)
- {
- PosterizeDialog *pd;
-
- pd = (PosterizeDialog *) data;
-
- gtk_adjustment_set_value (GTK_ADJUSTMENT (pd->levels_data), 3);
- }
-
- static void
- posterize_ok_callback (GtkWidget *widget,
- gpointer data)
- {
- PosterizeDialog *pd;
-
- pd = (PosterizeDialog *) data;
-
- gimp_dialog_hide (pd->shell);
-
- active_tool->preserve = TRUE;
-
- if (!pd->preview)
- {
- posterize_lut_setup( pd->lut, pd->levels,
- gimp_drawable_bytes (pd->drawable));
- image_map_apply (pd->image_map, (ImageMapApplyFunc) gimp_lut_process_2,
- (void *) pd->lut);
- }
-
- if (pd->image_map)
- image_map_commit (pd->image_map);
-
- active_tool->preserve = FALSE;
-
- pd->image_map = NULL;
-
- active_tool->gdisp_ptr = NULL;
- active_tool->drawable = NULL;
- }
-
- static void
- posterize_cancel_callback (GtkWidget *widget,
- gpointer data)
- {
- PosterizeDialog *pd;
-
- pd = (PosterizeDialog *) data;
-
- gimp_dialog_hide (pd->shell);
-
- if (pd->image_map)
- {
- active_tool->preserve = TRUE;
- image_map_abort (pd->image_map);
- active_tool->preserve = FALSE;
-
- pd->image_map = NULL;
- gdisplays_flush ();
- }
-
- active_tool->gdisp_ptr = NULL;
- active_tool->drawable = NULL;
- }
-
- static void
- posterize_preview_update (GtkWidget *widget,
- gpointer data)
- {
- PosterizeDialog *pd;
-
- pd = (PosterizeDialog *) data;
-
- if (GTK_TOGGLE_BUTTON (widget)->active)
- {
- pd->preview = TRUE;
- posterize_preview (pd);
- }
- else
- {
- pd->preview = FALSE;
- if (pd->image_map)
- {
- active_tool->preserve = TRUE;
- image_map_clear (pd->image_map);
- active_tool->preserve = FALSE;
- gdisplays_flush ();
- }
- }
- }
-
- static void
- posterize_levels_adjustment_update (GtkAdjustment *adjustment,
- gpointer data)
- {
- PosterizeDialog *pd;
-
- pd = (PosterizeDialog *) data;
-
- if (pd->levels != adjustment->value)
- {
- pd->levels = adjustment->value;
-
- if (pd->preview)
- posterize_preview (pd);
- }
- }
-