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gimp/app/tools/gimpposterizetool.c

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/* GIMP - The GNU 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 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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpconfig/gimpconfig.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "base/gimplut.h"
#include "base/lut-funcs.h"
#include "gegl/gimpposterizeconfig.h"
#include "core/gimpdrawable.h"
#include "core/gimperror.h"
#include "core/gimpimage.h"
#include "widgets/gimphelp-ids.h"
#include "display/gimpdisplay.h"
#include "gimpimagemapoptions.h"
#include "gimpposterizetool.h"
#include "gimp-intl.h"
#define SLIDER_WIDTH 200
static void gimp_posterize_tool_finalize (GObject *object);
static gboolean gimp_posterize_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error);
static GeglNode * gimp_posterize_tool_get_operation (GimpImageMapTool *im_tool,
GObject **config);
static void gimp_posterize_tool_map (GimpImageMapTool *im_tool);
static void gimp_posterize_tool_dialog (GimpImageMapTool *im_tool);
static void gimp_posterize_tool_config_notify (GObject *object,
GParamSpec *pspec,
GimpPosterizeTool *posterize_tool);
static void gimp_posterize_tool_levels_changed (GtkAdjustment *adjustment,
GimpPosterizeTool *posterize_tool);
G_DEFINE_TYPE (GimpPosterizeTool, gimp_posterize_tool,
GIMP_TYPE_IMAGE_MAP_TOOL)
#define parent_class gimp_posterize_tool_parent_class
void
gimp_posterize_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_POSTERIZE_TOOL,
GIMP_TYPE_IMAGE_MAP_OPTIONS, NULL,
0,
"gimp-posterize-tool",
_("Posterize"),
_("Posterize Tool: Reduce to a limited set of colors"),
N_("_Posterize..."), NULL,
NULL, GIMP_HELP_TOOL_POSTERIZE,
GIMP_STOCK_TOOL_POSTERIZE,
data);
}
static void
gimp_posterize_tool_class_init (GimpPosterizeToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpImageMapToolClass *im_tool_class = GIMP_IMAGE_MAP_TOOL_CLASS (klass);
object_class->finalize = gimp_posterize_tool_finalize;
tool_class->initialize = gimp_posterize_tool_initialize;
im_tool_class->shell_desc = _("Posterize (Reduce Number of Colors)");
im_tool_class->get_operation = gimp_posterize_tool_get_operation;
im_tool_class->map = gimp_posterize_tool_map;
im_tool_class->dialog = gimp_posterize_tool_dialog;
}
static void
gimp_posterize_tool_init (GimpPosterizeTool *posterize_tool)
{
GimpImageMapTool *im_tool = GIMP_IMAGE_MAP_TOOL (posterize_tool);
posterize_tool->lut = gimp_lut_new ();
im_tool->apply_func = (GimpImageMapApplyFunc) gimp_lut_process;
im_tool->apply_data = posterize_tool->lut;
}
static void
gimp_posterize_tool_finalize (GObject *object)
{
GimpPosterizeTool *posterize_tool = GIMP_POSTERIZE_TOOL (object);
if (posterize_tool->lut)
{
gimp_lut_free (posterize_tool->lut);
posterize_tool->lut = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gimp_posterize_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error)
{
GimpPosterizeTool *posterize_tool = GIMP_POSTERIZE_TOOL (tool);
GimpImage *image = gimp_display_get_image (display);
GimpDrawable *drawable;
drawable = gimp_image_get_active_drawable (image);
if (! drawable)
return FALSE;
if (gimp_drawable_is_indexed (drawable))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("Posterize does not operate on indexed layers."));
return FALSE;
}
gimp_config_reset (GIMP_CONFIG (posterize_tool->config));
if (! GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error))
{
return FALSE;
}
gtk_adjustment_set_value (posterize_tool->levels_data,
posterize_tool->config->levels);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (posterize_tool));
return TRUE;
}
static GeglNode *
gimp_posterize_tool_get_operation (GimpImageMapTool *image_map_tool,
GObject **config)
{
GimpPosterizeTool *posterize_tool = GIMP_POSTERIZE_TOOL (image_map_tool);
GeglNode *node;
node = g_object_new (GEGL_TYPE_NODE,
"operation", "gimp:posterize",
NULL);
posterize_tool->config = g_object_new (GIMP_TYPE_POSTERIZE_CONFIG, NULL);
*config = G_OBJECT (posterize_tool->config);
g_signal_connect_object (posterize_tool->config, "notify",
G_CALLBACK (gimp_posterize_tool_config_notify),
G_OBJECT (posterize_tool), 0);
gegl_node_set (node,
"config", posterize_tool->config,
NULL);
return node;
}
static void
gimp_posterize_tool_map (GimpImageMapTool *image_map_tool)
{
GimpPosterizeTool *posterize_tool = GIMP_POSTERIZE_TOOL (image_map_tool);
posterize_lut_setup (posterize_tool->lut,
posterize_tool->config->levels,
gimp_drawable_bytes (image_map_tool->drawable));
}
/**********************/
/* Posterize dialog */
/**********************/
static void
gimp_posterize_tool_dialog (GimpImageMapTool *image_map_tool)
{
GimpPosterizeTool *posterize_tool = GIMP_POSTERIZE_TOOL (image_map_tool);
GtkWidget *main_vbox;
GtkWidget *table;
GtkWidget *slider;
GtkObject *data;
main_vbox = gimp_image_map_tool_dialog_get_vbox (image_map_tool);
/* The table containing sliders */
table = gtk_table_new (1, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 4);
gtk_box_pack_start (GTK_BOX (main_vbox), table, FALSE, FALSE, 0);
gtk_widget_show (table);
data = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
_("Posterize _levels:"), SLIDER_WIDTH, -1,
posterize_tool->config->levels,
2.0, 256.0, 1.0, 10.0, 0,
TRUE, 0.0, 0.0,
NULL, NULL);
gimp_scale_entry_set_logarithmic (data, TRUE);
posterize_tool->levels_data = GTK_ADJUSTMENT (data);
slider = GIMP_SCALE_ENTRY_SCALE (data);
gtk_range_set_update_policy (GTK_RANGE (slider), GTK_UPDATE_DELAYED);
g_signal_connect (posterize_tool->levels_data, "value-changed",
G_CALLBACK (gimp_posterize_tool_levels_changed),
posterize_tool);
}
static void
gimp_posterize_tool_config_notify (GObject *object,
GParamSpec *pspec,
GimpPosterizeTool *posterize_tool)
{
GimpPosterizeConfig *config = GIMP_POSTERIZE_CONFIG (object);
if (! posterize_tool->levels_data)
return;
gtk_adjustment_set_value (posterize_tool->levels_data, config->levels);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (posterize_tool));
}
static void
gimp_posterize_tool_levels_changed (GtkAdjustment *adjustment,
GimpPosterizeTool *posterize_tool)
{
gint value = ROUND (gtk_adjustment_get_value (adjustment));
if (posterize_tool->config->levels != value)
{
g_object_set (posterize_tool->config,
"levels", value,
NULL);
}
}
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