4af6fb5944
In GimpThresholdTool, calculate the histogram of the target drawable asynchronously, rather than synchronously, to avoid blocking the UI while the histogram is calculated. Additionally, fix the initial "low" threshold value for > 8bpc images (127/255 => 0.5).
419 lines
14 KiB
C
419 lines
14 KiB
C
/* GIMP - The GNU 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 3 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, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libgimpconfig/gimpconfig.h"
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#include "libgimpwidgets/gimpwidgets.h"
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#include "tools-types.h"
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#include "core/gimpasync.h"
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#include "core/gimpdrawable.h"
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#include "core/gimpdrawable-histogram.h"
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#include "core/gimphistogram.h"
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#include "core/gimpimage.h"
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#include "widgets/gimphelp-ids.h"
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#include "widgets/gimphistogrambox.h"
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#include "widgets/gimphistogramview.h"
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#include "display/gimpdisplay.h"
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#include "gimphistogramoptions.h"
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#include "gimpthresholdtool.h"
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#include "gimptooloptions-gui.h"
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#include "gimp-intl.h"
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/* local function prototypes */
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static void gimp_threshold_tool_finalize (GObject *object);
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static gboolean gimp_threshold_tool_initialize (GimpTool *tool,
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GimpDisplay *display,
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GError **error);
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static gchar * gimp_threshold_tool_get_operation (GimpFilterTool *filter_tool,
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gchar **description);
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static void gimp_threshold_tool_dialog (GimpFilterTool *filter_tool);
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static void gimp_threshold_tool_config_notify (GimpFilterTool *filter_tool,
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GimpConfig *config,
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const GParamSpec *pspec);
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static gboolean gimp_threshold_tool_channel_sensitive
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(gint value,
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gpointer data);
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static void gimp_threshold_tool_histogram_range (GimpHistogramView *view,
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gint start,
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gint end,
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GimpThresholdTool *t_tool);
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static void gimp_threshold_tool_auto_clicked (GtkWidget *button,
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GimpThresholdTool *t_tool);
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G_DEFINE_TYPE (GimpThresholdTool, gimp_threshold_tool,
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GIMP_TYPE_FILTER_TOOL)
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#define parent_class gimp_threshold_tool_parent_class
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void
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gimp_threshold_tool_register (GimpToolRegisterCallback callback,
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gpointer data)
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{
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(* callback) (GIMP_TYPE_THRESHOLD_TOOL,
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GIMP_TYPE_HISTOGRAM_OPTIONS,
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NULL,
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0,
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"gimp-threshold-tool",
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_("Threshold"),
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_("Reduce image to two colors using a threshold"),
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N_("_Threshold..."), NULL,
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NULL, GIMP_HELP_TOOL_THRESHOLD,
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GIMP_ICON_TOOL_THRESHOLD,
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data);
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}
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static void
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gimp_threshold_tool_class_init (GimpThresholdToolClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
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GimpFilterToolClass *filter_tool_class = GIMP_FILTER_TOOL_CLASS (klass);
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object_class->finalize = gimp_threshold_tool_finalize;
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tool_class->initialize = gimp_threshold_tool_initialize;
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filter_tool_class->get_operation = gimp_threshold_tool_get_operation;
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filter_tool_class->dialog = gimp_threshold_tool_dialog;
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filter_tool_class->config_notify = gimp_threshold_tool_config_notify;
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}
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static void
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gimp_threshold_tool_init (GimpThresholdTool *t_tool)
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{
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t_tool->histogram = gimp_histogram_new (FALSE);
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}
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static void
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gimp_threshold_tool_finalize (GObject *object)
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{
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GimpThresholdTool *t_tool = GIMP_THRESHOLD_TOOL (object);
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g_clear_object (&t_tool->histogram);
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g_clear_object (&t_tool->histogram_async);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static gboolean
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gimp_threshold_tool_initialize (GimpTool *tool,
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GimpDisplay *display,
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GError **error)
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{
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GimpThresholdTool *t_tool = GIMP_THRESHOLD_TOOL (tool);
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GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
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GimpImage *image = gimp_display_get_image (display);
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GimpDrawable *drawable = gimp_image_get_active_drawable (image);
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gdouble low;
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gdouble high;
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gint n_bins;
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if (! GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error))
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{
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return FALSE;
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}
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g_clear_object (&t_tool->histogram_async);
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g_object_get (filter_tool->config,
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"low", &low,
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"high", &high,
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NULL);
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/* this is a hack to make sure that
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* 'gimp_histogram_n_bins (t_tool->histogram)' returns the correct value for
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* 'drawable' before the asynchronous calculation of its histogram is
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* finished.
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*/
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{
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GeglBuffer *temp;
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temp = gegl_buffer_new (GEGL_RECTANGLE (0, 0, 1, 1),
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gimp_drawable_get_format (drawable));
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gimp_histogram_calculate (t_tool->histogram,
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temp, GEGL_RECTANGLE (0, 0, 1, 1),
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NULL, NULL);
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g_object_unref (temp);
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}
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n_bins = gimp_histogram_n_bins (t_tool->histogram);
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t_tool->histogram_async = gimp_drawable_calculate_histogram_async (
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drawable, t_tool->histogram, FALSE);
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gimp_histogram_view_set_histogram (t_tool->histogram_box->view,
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t_tool->histogram);
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gimp_histogram_view_set_range (t_tool->histogram_box->view,
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low * (n_bins - 0.0001),
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high * (n_bins - 0.0001));
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return TRUE;
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}
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static gchar *
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gimp_threshold_tool_get_operation (GimpFilterTool *filter_tool,
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gchar **description)
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{
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*description = g_strdup (_("Apply Threshold"));
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return g_strdup ("gimp:threshold");
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}
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/**********************/
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/* Threshold dialog */
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/**********************/
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static void
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gimp_threshold_tool_dialog (GimpFilterTool *filter_tool)
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{
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GimpThresholdTool *t_tool = GIMP_THRESHOLD_TOOL (filter_tool);
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GimpToolOptions *tool_options = GIMP_TOOL_GET_OPTIONS (filter_tool);
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GtkWidget *main_vbox;
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GtkWidget *main_frame;
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GtkWidget *frame_vbox;
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GtkWidget *hbox;
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GtkWidget *label;
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GtkWidget *hbox2;
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GtkWidget *box;
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GtkWidget *button;
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GimpHistogramChannel channel;
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main_vbox = gimp_filter_tool_dialog_get_vbox (filter_tool);
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main_frame = gimp_frame_new (NULL);
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gtk_box_pack_start (GTK_BOX (main_vbox), main_frame, TRUE, TRUE, 0);
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gtk_widget_show (main_frame);
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hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
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gtk_frame_set_label_widget (GTK_FRAME (main_frame), hbox);
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gtk_widget_show (hbox);
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label = gtk_label_new_with_mnemonic (_("Cha_nnel:"));
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gimp_label_set_attributes (GTK_LABEL (label),
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PANGO_ATTR_WEIGHT, PANGO_WEIGHT_BOLD,
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-1);
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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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t_tool->channel_menu = gimp_prop_enum_combo_box_new (filter_tool->config,
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"channel", -1, -1);
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gimp_enum_combo_box_set_icon_prefix (GIMP_ENUM_COMBO_BOX (t_tool->channel_menu),
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"gimp-channel");
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gimp_int_combo_box_set_sensitivity (GIMP_INT_COMBO_BOX (t_tool->channel_menu),
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gimp_threshold_tool_channel_sensitive,
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filter_tool, NULL);
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gtk_box_pack_start (GTK_BOX (hbox), t_tool->channel_menu, FALSE, FALSE, 0);
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gtk_widget_show (t_tool->channel_menu);
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gtk_label_set_mnemonic_widget (GTK_LABEL (label), t_tool->channel_menu);
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hbox2 = gimp_prop_enum_icon_box_new (G_OBJECT (tool_options),
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"histogram-scale", "gimp-histogram",
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0, 0);
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gtk_box_pack_end (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
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gtk_widget_show (hbox2);
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frame_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
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gtk_container_add (GTK_CONTAINER (main_frame), frame_vbox);
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gtk_widget_show (frame_vbox);
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box = gimp_histogram_box_new ();
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gtk_box_pack_start (GTK_BOX (frame_vbox), box, TRUE, TRUE, 0);
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gtk_widget_show (box);
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t_tool->histogram_box = GIMP_HISTOGRAM_BOX (box);
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g_object_get (filter_tool->config,
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"channel", &channel,
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NULL);
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gimp_histogram_view_set_channel (t_tool->histogram_box->view, channel);
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g_signal_connect (t_tool->histogram_box->view, "range-changed",
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G_CALLBACK (gimp_threshold_tool_histogram_range),
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t_tool);
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g_object_bind_property (G_OBJECT (tool_options), "histogram-scale",
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G_OBJECT (t_tool->histogram_box->view), "histogram-scale",
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G_BINDING_SYNC_CREATE |
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G_BINDING_BIDIRECTIONAL);
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hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
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gtk_box_pack_start (GTK_BOX (frame_vbox), hbox, FALSE, FALSE, 0);
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gtk_widget_show (hbox);
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button = gtk_button_new_with_mnemonic (_("_Auto"));
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gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
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gimp_help_set_help_data (button, _("Automatically adjust to optimal "
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"binarization threshold"), NULL);
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gtk_widget_show (button);
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g_signal_connect (button, "clicked",
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G_CALLBACK (gimp_threshold_tool_auto_clicked),
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t_tool);
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}
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static void
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gimp_threshold_tool_config_notify (GimpFilterTool *filter_tool,
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GimpConfig *config,
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const GParamSpec *pspec)
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{
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GimpThresholdTool *t_tool = GIMP_THRESHOLD_TOOL (filter_tool);
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GIMP_FILTER_TOOL_CLASS (parent_class)->config_notify (filter_tool,
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config, pspec);
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if (! t_tool->histogram_box)
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return;
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if (! strcmp (pspec->name, "channel"))
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{
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GimpHistogramChannel channel;
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g_object_get (config,
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"channel", &channel,
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NULL);
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gimp_histogram_view_set_channel (t_tool->histogram_box->view,
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channel);
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}
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else if (! strcmp (pspec->name, "low") ||
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! strcmp (pspec->name, "high"))
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{
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gdouble low;
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gdouble high;
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gint n_bins;
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g_object_get (config,
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"low", &low,
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"high", &high,
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NULL);
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n_bins = gimp_histogram_n_bins (t_tool->histogram);
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gimp_histogram_view_set_range (t_tool->histogram_box->view,
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low * (n_bins - 0.0001),
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high * (n_bins - 0.0001));
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}
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}
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static gboolean
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gimp_threshold_tool_channel_sensitive (gint value,
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gpointer data)
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{
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GimpDrawable *drawable = GIMP_TOOL (data)->drawable;
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GimpHistogramChannel channel = value;
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if (!drawable)
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return FALSE;
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switch (channel)
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{
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case GIMP_HISTOGRAM_VALUE:
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return TRUE;
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case GIMP_HISTOGRAM_RED:
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case GIMP_HISTOGRAM_GREEN:
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case GIMP_HISTOGRAM_BLUE:
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return gimp_drawable_is_rgb (drawable);
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case GIMP_HISTOGRAM_ALPHA:
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return gimp_drawable_has_alpha (drawable);
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case GIMP_HISTOGRAM_RGB:
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return gimp_drawable_is_rgb (drawable);
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case GIMP_HISTOGRAM_LUMINANCE:
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return gimp_drawable_is_rgb (drawable);
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}
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return FALSE;
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}
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static void
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gimp_threshold_tool_histogram_range (GimpHistogramView *widget,
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gint start,
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gint end,
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GimpThresholdTool *t_tool)
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{
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GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (t_tool);
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gint n_bins = gimp_histogram_n_bins (t_tool->histogram);
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gdouble low = (gdouble) start / (n_bins - 1);
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gdouble high = (gdouble) end / (n_bins - 1);
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gdouble config_low;
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gdouble config_high;
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g_object_get (filter_tool->config,
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"low", &config_low,
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"high", &config_high,
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NULL);
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if (low != config_low ||
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high != config_high)
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{
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g_object_set (filter_tool->config,
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"low", low,
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"high", high,
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NULL);
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}
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}
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static void
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gimp_threshold_tool_auto_clicked (GtkWidget *button,
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GimpThresholdTool *t_tool)
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{
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GimpHistogramChannel channel;
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gint n_bins;
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gdouble low;
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gimp_async_wait (t_tool->histogram_async);
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g_object_get (GIMP_FILTER_TOOL (t_tool)->config,
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"channel", &channel,
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NULL);
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n_bins = gimp_histogram_n_bins (t_tool->histogram);
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low = gimp_histogram_get_threshold (t_tool->histogram,
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channel,
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0, n_bins - 1);
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gimp_histogram_view_set_range (t_tool->histogram_box->view,
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low, n_bins - 1);
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}
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