mirror of https://github.com/GNOME/gimp.git
372 lines
8.8 KiB
C
372 lines
8.8 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "appenv.h"
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#include "drawable.h"
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#include "gdisplay.h"
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#include "image_map.h"
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#include "interface.h"
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#include "posterize.h"
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#include "gimplut.h"
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#include "gimpui.h"
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#include "lut_funcs.h"
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#include "libgimp/gimpintl.h"
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/* the posterize structures */
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typedef struct _Posterize Posterize;
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struct _Posterize
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{
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gint x, y; /* coords for last mouse click */
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};
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typedef struct _PosterizeDialog PosterizeDialog;
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struct _PosterizeDialog
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{
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GtkWidget *shell;
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GtkAdjustment *levels_data;
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GimpDrawable *drawable;
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ImageMap image_map;
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gint levels;
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gboolean preview;
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GimpLut *lut;
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};
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/* the posterize tool options */
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static ToolOptions *posterize_options = NULL;
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/* the posterize tool dialog */
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static PosterizeDialog *posterize_dialog = NULL;
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/* posterize action functions */
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static void posterize_control (Tool *, ToolAction, gpointer);
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static PosterizeDialog * posterize_dialog_new (void);
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static void posterize_preview (PosterizeDialog *);
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static void posterize_reset_callback (GtkWidget *, gpointer);
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static void posterize_ok_callback (GtkWidget *, gpointer);
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static void posterize_cancel_callback (GtkWidget *, gpointer);
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static void posterize_preview_update (GtkWidget *, gpointer);
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static void posterize_levels_adjustment_update (GtkAdjustment *, gpointer);
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/* posterize select action functions */
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static void
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posterize_control (Tool *tool,
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ToolAction action,
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gpointer gdisp_ptr)
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{
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switch (action)
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{
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case PAUSE:
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break;
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case RESUME:
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break;
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case HALT:
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if (posterize_dialog)
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posterize_cancel_callback (NULL, (gpointer) posterize_dialog);
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break;
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default:
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break;
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}
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}
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Tool *
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tools_new_posterize (void)
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{
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Tool * tool;
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Posterize * private;
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/* The tool options */
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if (! posterize_options)
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{
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posterize_options = tool_options_new (("Posterize Options"));
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tools_register (POSTERIZE, posterize_options);
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}
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tool = tools_new_tool (POSTERIZE);
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private = g_new (Posterize, 1);
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tool->scroll_lock = TRUE; /* Disallow scrolling */
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tool->preserve = FALSE; /* Don't preserve on drawable change */
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tool->private = (void *) private;
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tool->control_func = posterize_control;
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return tool;
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}
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void
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tools_free_posterize (Tool *tool)
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{
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Posterize * post;
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post = (Posterize *) tool->private;
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/* Close the posterize dialog */
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if (posterize_dialog)
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posterize_cancel_callback (NULL, (gpointer) posterize_dialog);
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g_free (post);
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}
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void
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posterize_initialize (GDisplay *gdisp)
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{
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if (drawable_indexed (gimage_active_drawable (gdisp->gimage)))
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{
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g_message (_("Posterize does not operate on indexed drawables."));
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return;
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}
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/* The posterize dialog */
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if (!posterize_dialog)
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posterize_dialog = posterize_dialog_new ();
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else
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if (!GTK_WIDGET_VISIBLE (posterize_dialog->shell))
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gtk_widget_show (posterize_dialog->shell);
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posterize_dialog->levels = 3;
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posterize_dialog->drawable = gimage_active_drawable (gdisp->gimage);
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posterize_dialog->image_map =
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image_map_create (gdisp, posterize_dialog->drawable);
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gtk_adjustment_set_value (GTK_ADJUSTMENT (posterize_dialog->levels_data), 3);
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if (posterize_dialog->preview)
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posterize_preview (posterize_dialog);
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}
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/**********************/
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/* Posterize dialog */
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/**********************/
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static PosterizeDialog *
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posterize_dialog_new (void)
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{
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PosterizeDialog *pd;
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GtkWidget *vbox;
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GtkWidget *hbox;
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GtkWidget *label;
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GtkWidget *spinbutton;
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GtkWidget *toggle;
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GtkObject *data;
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pd = g_new (PosterizeDialog, 1);
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pd->preview = TRUE;
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pd->levels = 3;
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pd->lut = gimp_lut_new ();
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/* The shell and main vbox */
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pd->shell =
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gimp_dialog_new (_("Posterize"), "posterize",
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tools_help_func, NULL,
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GTK_WIN_POS_NONE,
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FALSE, TRUE, FALSE,
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_("OK"), posterize_ok_callback,
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pd, NULL, NULL, TRUE, FALSE,
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_("Reset"), posterize_reset_callback,
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pd, NULL, NULL, TRUE, FALSE,
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_("Cancel"), posterize_cancel_callback,
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pd, NULL, NULL, FALSE, TRUE,
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NULL);
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vbox = gtk_vbox_new (FALSE, 2);
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gtk_container_set_border_width (GTK_CONTAINER (vbox), 4);
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gtk_container_add (GTK_CONTAINER (GTK_DIALOG (pd->shell)->vbox), vbox);
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/* Horizontal box for levels text widget */
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hbox = gtk_hbox_new (FALSE, 4);
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gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
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label = gtk_label_new (_("Posterize Levels:"));
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gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
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gtk_widget_show (label);
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/* levels spinbutton */
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data = gtk_adjustment_new (3, 2, 256, 1.0, 10.0, 0.0);
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pd->levels_data = GTK_ADJUSTMENT (data);
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spinbutton = gtk_spin_button_new (pd->levels_data, 1.0, 0);
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gtk_widget_set_usize (spinbutton, 75, -1);
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gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
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gtk_signal_connect (GTK_OBJECT (pd->levels_data), "value_changed",
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GTK_SIGNAL_FUNC (posterize_levels_adjustment_update),
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pd);
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gtk_widget_show (spinbutton);
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gtk_widget_show (hbox);
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/* Horizontal box for preview */
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hbox = gtk_hbox_new (FALSE, 4);
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gtk_box_pack_end (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
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/* The preview toggle */
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toggle = gtk_check_button_new_with_label (_("Preview"));
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), pd->preview);
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gtk_box_pack_end (GTK_BOX (hbox), toggle, FALSE, FALSE, 0);
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gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
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GTK_SIGNAL_FUNC (posterize_preview_update),
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pd);
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gtk_widget_show (label);
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gtk_widget_show (toggle);
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gtk_widget_show (hbox);
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gtk_widget_show (vbox);
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gtk_widget_show (pd->shell);
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return pd;
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}
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static void
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posterize_preview (PosterizeDialog *pd)
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{
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if (!pd->image_map)
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{
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g_warning ("posterize_preview(): No image map");
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return;
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}
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active_tool->preserve = TRUE;
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posterize_lut_setup (pd->lut, pd->levels, gimp_drawable_bytes(pd->drawable));
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image_map_apply (pd->image_map, (ImageMapApplyFunc) gimp_lut_process_2,
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(void *) pd->lut);
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active_tool->preserve = FALSE;
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}
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static void
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posterize_reset_callback (GtkWidget *widget,
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gpointer data)
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{
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PosterizeDialog *pd;
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pd = (PosterizeDialog *) data;
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gtk_adjustment_set_value (GTK_ADJUSTMENT (pd->levels_data), 3);
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}
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static void
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posterize_ok_callback (GtkWidget *widget,
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gpointer data)
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{
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PosterizeDialog *pd;
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pd = (PosterizeDialog *) data;
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if (GTK_WIDGET_VISIBLE (pd->shell))
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gtk_widget_hide (pd->shell);
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active_tool->preserve = TRUE;
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if (!pd->preview)
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{
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posterize_lut_setup( pd->lut, pd->levels,
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gimp_drawable_bytes (pd->drawable));
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image_map_apply (pd->image_map, (ImageMapApplyFunc) gimp_lut_process_2,
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(void *) pd->lut);
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}
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if (pd->image_map)
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image_map_commit (pd->image_map);
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active_tool->preserve = FALSE;
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pd->image_map = NULL;
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active_tool->gdisp_ptr = NULL;
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active_tool->drawable = NULL;
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}
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static void
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posterize_cancel_callback (GtkWidget *widget,
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gpointer data)
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{
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PosterizeDialog *pd;
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pd = (PosterizeDialog *) data;
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if (GTK_WIDGET_VISIBLE (pd->shell))
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gtk_widget_hide (pd->shell);
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if (pd->image_map)
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{
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active_tool->preserve = TRUE;
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image_map_abort (pd->image_map);
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active_tool->preserve = FALSE;
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pd->image_map = NULL;
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gdisplays_flush ();
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}
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active_tool->gdisp_ptr = NULL;
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active_tool->drawable = NULL;
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}
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static void
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posterize_preview_update (GtkWidget *widget,
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gpointer data)
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{
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PosterizeDialog *pd;
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pd = (PosterizeDialog *) data;
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if (GTK_TOGGLE_BUTTON (widget)->active)
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{
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pd->preview = TRUE;
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posterize_preview (pd);
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}
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else
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pd->preview = FALSE;
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}
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static void
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posterize_levels_adjustment_update (GtkAdjustment *adjustment,
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gpointer data)
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{
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PosterizeDialog *pd;
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pd = (PosterizeDialog *) data;
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if (pd->levels != adjustment->value)
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{
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pd->levels = adjustment->value;
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if (pd->preview)
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posterize_preview (pd);
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}
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}
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