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gimp/app/tools/gimpposterizetool.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 "tools-types.h"
#include "base/gimplut.h"
#include "base/lut-funcs.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "widgets/gimpwidgets-utils.h"
#include "display/gimpdisplay.h"
#include "gimpposterizetool.h"
#include "tool_manager.h"
#include "tool_options.h"
#include "app_procs.h"
#include "image_map.h"
#include "libgimp/gimpintl.h"
typedef struct _PosterizeDialog PosterizeDialog;
struct _PosterizeDialog
{
GtkWidget *shell;
GtkAdjustment *levels_data;
GimpDrawable *drawable;
ImageMap *image_map;
gint levels;
gboolean preview;
GimpLut *lut;
};
/* local function prototypes */
static void gimp_posterize_tool_class_init (GimpPosterizeToolClass *klass);
static void gimp_posterize_tool_init (GimpPosterizeTool *bc_tool);
static void gimp_posterize_tool_initialize (GimpTool *tool,
GDisplay *gdisp);
static void gimp_posterize_tool_control (GimpTool *tool,
ToolAction action,
GDisplay *gdisp);
static PosterizeDialog * posterize_dialog_new (void);
static void posterize_preview (PosterizeDialog *pd);
static void posterize_reset_callback (GtkWidget *widget,
gpointer data);
static void posterize_ok_callback (GtkWidget *widget,
gpointer data);
static void posterize_cancel_callback (GtkWidget *widget,
gpointer data);
static void posterize_preview_update (GtkWidget *widget,
gpointer data);
static void posterize_levels_adjustment_update (GtkAdjustment *adjustment,
gpointer data);
/* the posterize tool options */
static GimpToolOptions *posterize_options = NULL;
/* the posterize tool dialog */
static PosterizeDialog *posterize_dialog = NULL;
static GimpImageMapToolClass *parent_class = NULL;
/* functions */
void
gimp_posterize_tool_register (Gimp *gimp)
{
tool_manager_register_tool (gimp,
GIMP_TYPE_POSTERIZE_TOOL,
FALSE,
"gimp:posterize_tool",
_("Posterize"),
_("Reduce image to a fixed numer of colors"),
N_("/Image/Colors/Posterize..."), NULL,
NULL, "tools/posterize.html",
GIMP_STOCK_TOOL_POSTERIZE);
}
GType
gimp_posterize_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpPosterizeToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_posterize_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpPosterizeTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_posterize_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_IMAGE_MAP_TOOL,
"GimpPosterizeTool",
&tool_info, 0);
}
return tool_type;
}
static void
gimp_posterize_tool_class_init (GimpPosterizeToolClass *klass)
{
GimpToolClass *tool_class;
tool_class = GIMP_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
tool_class->initialize = gimp_posterize_tool_initialize;
tool_class->control = gimp_posterize_tool_control;
}
static void
gimp_posterize_tool_init (GimpPosterizeTool *bc_tool)
{
GimpTool *tool;
tool = GIMP_TOOL (bc_tool);
if (! posterize_options)
{
posterize_options = tool_options_new ();
tool_manager_register_tool_options (GIMP_TYPE_POSTERIZE_TOOL,
(GimpToolOptions *) posterize_options);
}
}
static void
gimp_posterize_tool_initialize (GimpTool *tool,
GDisplay *gdisp)
{
if (! gdisp)
{
posterize_dialog_hide ();
return;
}
if (gimp_drawable_is_indexed (gimp_image_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 = gimp_image_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);
}
static void
gimp_posterize_tool_control (GimpTool *tool,
ToolAction action,
GDisplay *gdisp)
{
switch (action)
{
case PAUSE:
break;
case RESUME:
break;
case HALT:
posterize_dialog_hide ();
break;
default:
break;
}
if (GIMP_TOOL_CLASS (parent_class)->control)
GIMP_TOOL_CLASS (parent_class)->control (tool, action, gdisp);
}
void
posterize_dialog_hide (void)
{
if (posterize_dialog)
posterize_cancel_callback (NULL, (gpointer) 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",
tool_manager_help_func, NULL,
GTK_WIN_POS_NONE,
FALSE, TRUE, FALSE,
GTK_STOCK_OK, posterize_ok_callback,
pd, NULL, NULL, TRUE, FALSE,
GIMP_STOCK_RESET, posterize_reset_callback,
pd, NULL, NULL, TRUE, FALSE,
GTK_STOCK_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);
g_signal_connect (G_OBJECT (pd->levels_data), "value_changed",
G_CALLBACK (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);
g_signal_connect (G_OBJECT (toggle), "toggled",
G_CALLBACK (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)
{
GimpTool *active_tool;
active_tool = tool_manager_get_active (the_gimp);
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;
GimpTool *active_tool;
pd = (PosterizeDialog *) data;
gimp_dialog_hide (pd->shell);
active_tool = tool_manager_get_active (the_gimp);
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,
(gpointer) pd->lut);
}
if (pd->image_map)
image_map_commit (pd->image_map);
active_tool->preserve = FALSE;
pd->image_map = NULL;
active_tool->gdisp = NULL;
active_tool->drawable = NULL;
}
static void
posterize_cancel_callback (GtkWidget *widget,
gpointer data)
{
PosterizeDialog *pd;
GimpTool *active_tool;
pd = (PosterizeDialog *) data;
gimp_dialog_hide (pd->shell);
active_tool = tool_manager_get_active (the_gimp);
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 = NULL;
active_tool->drawable = NULL;
}
static void
posterize_preview_update (GtkWidget *widget,
gpointer data)
{
PosterizeDialog *pd;
GimpTool *active_tool;
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 = tool_manager_get_active (the_gimp);
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);
}
}
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