/* 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 #include "libgimpwidgets/gimpwidgets.h" #include "tools-types.h" #include "base/gimphistogram.h" #include "base/threshold.h" #include "config/gimpbaseconfig.h" #include "core/gimp.h" #include "core/gimpdrawable.h" #include "core/gimpdrawable-histogram.h" #include "core/gimpimage.h" #include "core/gimpimagemap.h" #include "core/gimptoolinfo.h" #include "widgets/gimphelp-ids.h" #include "widgets/gimphistogrambox.h" #include "widgets/gimphistogramview.h" #include "display/gimpdisplay.h" #include "gimphistogramoptions.h" #include "gimpthresholdtool.h" #include "gimp-intl.h" #define LOW 0x1 #define HIGH 0x2 #define HISTOGRAM 0x4 #define ALL (LOW | HIGH | HISTOGRAM) /* local function prototypes */ static void gimp_threshold_tool_class_init (GimpThresholdToolClass *klass); static void gimp_threshold_tool_init (GimpThresholdTool *threshold_tool); static void gimp_threshold_tool_finalize (GObject *object); static void gimp_threshold_tool_initialize (GimpTool *tool, GimpDisplay *gdisp); static void gimp_threshold_tool_map (GimpImageMapTool *image_map_tool); static void gimp_threshold_tool_dialog (GimpImageMapTool *image_map_tool); static void gimp_threshold_tool_reset (GimpImageMapTool *image_map_tool); static void gimp_threshold_tool_histogram_range (GimpHistogramView *view, gint start, gint end, GimpThresholdTool *t_tool); static GimpImageMapToolClass *parent_class = NULL; /* public functions */ void gimp_threshold_tool_register (GimpToolRegisterCallback callback, gpointer data) { (* callback) (GIMP_TYPE_THRESHOLD_TOOL, GIMP_TYPE_HISTOGRAM_OPTIONS, gimp_histogram_options_gui, 0, "gimp-threshold-tool", _("Threshold"), _("Reduce image to two colors using a threshold"), N_("/Tools/Color Tools/_Threshold..."), NULL, NULL, GIMP_HELP_TOOL_THRESHOLD, GIMP_STOCK_TOOL_THRESHOLD, data); } GType gimp_threshold_tool_get_type (void) { static GType tool_type = 0; if (! tool_type) { static const GTypeInfo tool_info = { sizeof (GimpThresholdToolClass), (GBaseInitFunc) NULL, (GBaseFinalizeFunc) NULL, (GClassInitFunc) gimp_threshold_tool_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (GimpThresholdTool), 0, /* n_preallocs */ (GInstanceInitFunc) gimp_threshold_tool_init, }; tool_type = g_type_register_static (GIMP_TYPE_IMAGE_MAP_TOOL, "GimpThresholdTool", &tool_info, 0); } return tool_type; } /* private functions */ static void gimp_threshold_tool_class_init (GimpThresholdToolClass *klass) { GObjectClass *object_class; GimpToolClass *tool_class; GimpImageMapToolClass *image_map_tool_class; object_class = G_OBJECT_CLASS (klass); tool_class = GIMP_TOOL_CLASS (klass); image_map_tool_class = GIMP_IMAGE_MAP_TOOL_CLASS (klass); parent_class = g_type_class_peek_parent (klass); object_class->finalize = gimp_threshold_tool_finalize; tool_class->initialize = gimp_threshold_tool_initialize; image_map_tool_class->map = gimp_threshold_tool_map; image_map_tool_class->dialog = gimp_threshold_tool_dialog; image_map_tool_class->reset = gimp_threshold_tool_reset; } static void gimp_threshold_tool_init (GimpThresholdTool *t_tool) { GimpImageMapTool *image_map_tool = GIMP_IMAGE_MAP_TOOL (t_tool); image_map_tool->shell_desc = _("Apply Threshold"); t_tool->threshold = g_new0 (Threshold, 1); t_tool->hist = NULL; t_tool->threshold->low_threshold = 127; t_tool->threshold->high_threshold = 255; } static void gimp_threshold_tool_finalize (GObject *object) { GimpThresholdTool *t_tool = GIMP_THRESHOLD_TOOL (object); if (t_tool->threshold) { g_free (t_tool->threshold); t_tool->threshold = NULL; } if (t_tool->hist) { gimp_histogram_free (t_tool->hist); t_tool->hist = NULL; } G_OBJECT_CLASS (parent_class)->finalize (object); } static void gimp_threshold_tool_initialize (GimpTool *tool, GimpDisplay *gdisp) { GimpThresholdTool *t_tool = GIMP_THRESHOLD_TOOL (tool); GimpDrawable *drawable; drawable = gimp_image_active_drawable (gdisp->gimage); if (! drawable) return; if (gimp_drawable_is_indexed (drawable)) { g_message (_("Threshold does not operate on indexed layers.")); return; } if (!t_tool->hist) { Gimp *gimp = GIMP_TOOL (t_tool)->tool_info->gimp; t_tool->hist = gimp_histogram_new (GIMP_BASE_CONFIG (gimp->config)); } t_tool->threshold->color = gimp_drawable_is_rgb (drawable); t_tool->threshold->low_threshold = 127; t_tool->threshold->high_threshold = 255; GIMP_TOOL_CLASS (parent_class)->initialize (tool, gdisp); gimp_drawable_calculate_histogram (drawable, t_tool->hist); g_signal_handlers_block_by_func (t_tool->histogram_box->view, gimp_threshold_tool_histogram_range, t_tool); gimp_histogram_view_set_histogram (t_tool->histogram_box->view, t_tool->hist); gimp_histogram_view_set_range (t_tool->histogram_box->view, t_tool->threshold->low_threshold, t_tool->threshold->high_threshold); g_signal_handlers_unblock_by_func (t_tool->histogram_box->view, gimp_threshold_tool_histogram_range, t_tool); gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (t_tool)); } static void gimp_threshold_tool_map (GimpImageMapTool *image_map_tool) { GimpThresholdTool *t_tool = GIMP_THRESHOLD_TOOL (image_map_tool); gimp_image_map_apply (image_map_tool->image_map, threshold, t_tool->threshold); } /**********************/ /* Threshold dialog */ /**********************/ static void gimp_threshold_tool_dialog (GimpImageMapTool *image_map_tool) { GimpThresholdTool *t_tool = GIMP_THRESHOLD_TOOL (image_map_tool); GimpToolOptions *tool_options; GtkWidget *box; box = gimp_histogram_box_new (_("Threshold Range:")); gtk_container_add (GTK_CONTAINER (image_map_tool->main_vbox), box); gtk_widget_show (box); t_tool->histogram_box = GIMP_HISTOGRAM_BOX (box); g_signal_connect (t_tool->histogram_box->view, "range_changed", G_CALLBACK (gimp_threshold_tool_histogram_range), t_tool); tool_options = GIMP_TOOL (t_tool)->tool_info->tool_options; gimp_histogram_options_connect_view (GIMP_HISTOGRAM_OPTIONS (tool_options), t_tool->histogram_box->view); } static void gimp_threshold_tool_reset (GimpImageMapTool *image_map_tool) { GimpThresholdTool *t_tool = GIMP_THRESHOLD_TOOL (image_map_tool); t_tool->threshold->low_threshold = 127.0; t_tool->threshold->high_threshold = 255.0; gimp_histogram_view_set_range (t_tool->histogram_box->view, t_tool->threshold->low_threshold, t_tool->threshold->high_threshold); } static void gimp_threshold_tool_histogram_range (GimpHistogramView *widget, gint start, gint end, GimpThresholdTool *t_tool) { if (start != t_tool->threshold->low_threshold || end != t_tool->threshold->high_threshold) { t_tool->threshold->low_threshold = start; t_tool->threshold->high_threshold = end; gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (t_tool)); } }