Adding upstream version 2.10.36.upstream/2.10.36

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 436 insertions, 0 deletions

diff --git a/app/tools/gimpthresholdtool.c b/app/tools/gimpthresholdtool.c
new file mode 100644
index 0000000..3b21d72
--- /dev/null
+++ b/app/tools/gimpthresholdtool.c
@@ -0,0 +1,436 @@
+/* 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpconfig/gimpconfig.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "tools-types.h"
+
+#include "core/gimp-gui.h"
+#include "core/gimpasync.h"
+#include "core/gimpcancelable.h"
+#include "core/gimpdrawable.h"
+#include "core/gimpdrawable-histogram.h"
+#include "core/gimphistogram.h"
+#include "core/gimpimage.h"
+#include "core/gimptoolinfo.h"
+#include "core/gimptriviallycancelablewaitable.h"
+#include "core/gimpwaitable.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 "gimptooloptions-gui.h"
+
+#include "gimp-intl.h"
+
+
+/*  local function prototypes  */
+
+static void       gimp_threshold_tool_finalize        (GObject           *object);
+
+static gboolean   gimp_threshold_tool_initialize      (GimpTool          *tool,
+                                                       GimpDisplay       *display,
+                                                       GError           **error);
+
+static gchar    * gimp_threshold_tool_get_operation   (GimpFilterTool    *filter_tool,
+                                                       gchar            **description);
+static void       gimp_threshold_tool_dialog          (GimpFilterTool    *filter_tool);
+static void       gimp_threshold_tool_config_notify   (GimpFilterTool    *filter_tool,
+                                                       GimpConfig        *config,
+                                                       const GParamSpec  *pspec);
+
+static gboolean   gimp_threshold_tool_channel_sensitive
+                                                      (gint               value,
+                                                       gpointer           data);
+static void       gimp_threshold_tool_histogram_range (GimpHistogramView *view,
+                                                       gint               start,
+                                                       gint               end,
+                                                       GimpThresholdTool *t_tool);
+static void       gimp_threshold_tool_auto_clicked    (GtkWidget         *button,
+                                                       GimpThresholdTool *t_tool);
+
+
+G_DEFINE_TYPE (GimpThresholdTool, gimp_threshold_tool,
+               GIMP_TYPE_FILTER_TOOL)
+
+#define parent_class gimp_threshold_tool_parent_class
+
+
+void
+gimp_threshold_tool_register (GimpToolRegisterCallback  callback,
+                              gpointer                  data)
+{
+  (* callback) (GIMP_TYPE_THRESHOLD_TOOL,
+                GIMP_TYPE_HISTOGRAM_OPTIONS,
+                NULL,
+                0,
+                "gimp-threshold-tool",
+                _("Threshold"),
+                _("Reduce image to two colors using a threshold"),
+                N_("_Threshold..."), NULL,
+                NULL, GIMP_HELP_TOOL_THRESHOLD,
+                GIMP_ICON_TOOL_THRESHOLD,
+                data);
+}
+
+static void
+gimp_threshold_tool_class_init (GimpThresholdToolClass *klass)
+{
+  GObjectClass        *object_class      = G_OBJECT_CLASS (klass);
+  GimpToolClass       *tool_class        = GIMP_TOOL_CLASS (klass);
+  GimpFilterToolClass *filter_tool_class = GIMP_FILTER_TOOL_CLASS (klass);
+
+  object_class->finalize           = gimp_threshold_tool_finalize;
+
+  tool_class->initialize           = gimp_threshold_tool_initialize;
+
+  filter_tool_class->get_operation = gimp_threshold_tool_get_operation;
+  filter_tool_class->dialog        = gimp_threshold_tool_dialog;
+  filter_tool_class->config_notify = gimp_threshold_tool_config_notify;
+}
+
+static void
+gimp_threshold_tool_init (GimpThresholdTool *t_tool)
+{
+  t_tool->histogram = gimp_histogram_new (FALSE);
+}
+
+static void
+gimp_threshold_tool_finalize (GObject *object)
+{
+  GimpThresholdTool *t_tool = GIMP_THRESHOLD_TOOL (object);
+
+  g_clear_object (&t_tool->histogram);
+  g_clear_object (&t_tool->histogram_async);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gboolean
+gimp_threshold_tool_initialize (GimpTool     *tool,
+                                GimpDisplay  *display,
+                                GError      **error)
+{
+  GimpThresholdTool *t_tool      = GIMP_THRESHOLD_TOOL (tool);
+  GimpFilterTool    *filter_tool = GIMP_FILTER_TOOL (tool);
+  GimpImage         *image       = gimp_display_get_image (display);
+  GimpDrawable      *drawable    = gimp_image_get_active_drawable (image);
+  gdouble            low;
+  gdouble            high;
+  gint               n_bins;
+
+  if (! GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error))
+    {
+      return FALSE;
+    }
+
+  g_clear_object (&t_tool->histogram_async);
+
+  g_object_get (filter_tool->config,
+                "low",  &low,
+                "high", &high,
+                NULL);
+
+  /* this is a hack to make sure that
+   * 'gimp_histogram_n_bins (t_tool->histogram)' returns the correct value for
+   * 'drawable' before the asynchronous calculation of its histogram is
+   * finished.
+   */
+  {
+    GeglBuffer *temp;
+
+    temp = gegl_buffer_new (GEGL_RECTANGLE (0, 0, 1, 1),
+                            gimp_drawable_get_format (drawable));
+
+    gimp_histogram_calculate (t_tool->histogram,
+                              temp, GEGL_RECTANGLE (0, 0, 1, 1),
+                              NULL, NULL);
+
+    g_object_unref (temp);
+  }
+
+  n_bins = gimp_histogram_n_bins (t_tool->histogram);
+
+  t_tool->histogram_async = gimp_drawable_calculate_histogram_async (
+    drawable, t_tool->histogram, FALSE);
+  gimp_histogram_view_set_histogram (t_tool->histogram_box->view,
+                                     t_tool->histogram);
+
+  gimp_histogram_view_set_range (t_tool->histogram_box->view,
+                                 low  * (n_bins - 0.0001),
+                                 high * (n_bins - 0.0001));
+
+  return TRUE;
+}
+
+static gchar *
+gimp_threshold_tool_get_operation (GimpFilterTool  *filter_tool,
+                                   gchar          **description)
+{
+  *description = g_strdup (_("Apply Threshold"));
+
+  return g_strdup ("gimp:threshold");
+}
+
+
+/**********************/
+/*  Threshold dialog  */
+/**********************/
+
+static void
+gimp_threshold_tool_dialog (GimpFilterTool *filter_tool)
+{
+  GimpThresholdTool    *t_tool       = GIMP_THRESHOLD_TOOL (filter_tool);
+  GimpToolOptions      *tool_options = GIMP_TOOL_GET_OPTIONS (filter_tool);
+  GtkWidget            *main_vbox;
+  GtkWidget            *main_frame;
+  GtkWidget            *frame_vbox;
+  GtkWidget            *hbox;
+  GtkWidget            *label;
+  GtkWidget            *hbox2;
+  GtkWidget            *box;
+  GtkWidget            *button;
+  GimpHistogramChannel  channel;
+
+  main_vbox = gimp_filter_tool_dialog_get_vbox (filter_tool);
+
+  main_frame = gimp_frame_new (NULL);
+  gtk_box_pack_start (GTK_BOX (main_vbox), main_frame, TRUE, TRUE, 0);
+  gtk_widget_show (main_frame);
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_frame_set_label_widget (GTK_FRAME (main_frame), hbox);
+  gtk_widget_show (hbox);
+
+  label = gtk_label_new_with_mnemonic (_("Cha_nnel:"));
+  gimp_label_set_attributes (GTK_LABEL (label),
+                             PANGO_ATTR_WEIGHT, PANGO_WEIGHT_BOLD,
+                             -1);
+  gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
+  gtk_widget_show (label);
+
+  t_tool->channel_menu = gimp_prop_enum_combo_box_new (filter_tool->config,
+                                                       "channel", -1, -1);
+  gimp_enum_combo_box_set_icon_prefix (GIMP_ENUM_COMBO_BOX (t_tool->channel_menu),
+                                       "gimp-channel");
+
+  gimp_int_combo_box_set_sensitivity (GIMP_INT_COMBO_BOX (t_tool->channel_menu),
+                                      gimp_threshold_tool_channel_sensitive,
+                                      filter_tool, NULL);
+
+  gtk_box_pack_start (GTK_BOX (hbox), t_tool->channel_menu, FALSE, FALSE, 0);
+  gtk_widget_show (t_tool->channel_menu);
+
+  gtk_label_set_mnemonic_widget (GTK_LABEL (label), t_tool->channel_menu);
+
+  hbox2 = gimp_prop_enum_icon_box_new (G_OBJECT (tool_options),
+                                       "histogram-scale", "gimp-histogram",
+                                       0, 0);
+  gtk_box_pack_end (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
+  gtk_widget_show (hbox2);
+
+  frame_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
+  gtk_container_add (GTK_CONTAINER (main_frame), frame_vbox);
+  gtk_widget_show (frame_vbox);
+
+  box = gimp_histogram_box_new ();
+  gtk_box_pack_start (GTK_BOX (frame_vbox), box, TRUE, TRUE, 0);
+  gtk_widget_show (box);
+
+  t_tool->histogram_box = GIMP_HISTOGRAM_BOX (box);
+
+  g_object_get (filter_tool->config,
+                "channel", &channel,
+                NULL);
+
+  gimp_histogram_view_set_channel (t_tool->histogram_box->view, channel);
+
+  g_signal_connect (t_tool->histogram_box->view, "range-changed",
+                    G_CALLBACK (gimp_threshold_tool_histogram_range),
+                    t_tool);
+
+  g_object_bind_property (G_OBJECT (tool_options),                "histogram-scale",
+                          G_OBJECT (t_tool->histogram_box->view), "histogram-scale",
+                          G_BINDING_SYNC_CREATE |
+                          G_BINDING_BIDIRECTIONAL);
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_box_pack_start (GTK_BOX (frame_vbox), hbox, FALSE, FALSE, 0);
+  gtk_widget_show (hbox);
+
+  button = gtk_button_new_with_mnemonic (_("_Auto"));
+  gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
+  gimp_help_set_help_data (button, _("Automatically adjust to optimal "
+                                     "binarization threshold"), NULL);
+  gtk_widget_show (button);
+
+  g_signal_connect (button, "clicked",
+                    G_CALLBACK (gimp_threshold_tool_auto_clicked),
+                    t_tool);
+}
+
+static void
+gimp_threshold_tool_config_notify (GimpFilterTool   *filter_tool,
+                                   GimpConfig       *config,
+                                   const GParamSpec *pspec)
+{
+  GimpThresholdTool *t_tool = GIMP_THRESHOLD_TOOL (filter_tool);
+
+  GIMP_FILTER_TOOL_CLASS (parent_class)->config_notify (filter_tool,
+                                                        config, pspec);
+
+  if (! t_tool->histogram_box)
+    return;
+
+  if (! strcmp (pspec->name, "channel"))
+    {
+      GimpHistogramChannel channel;
+
+      g_object_get (config,
+                    "channel", &channel,
+                    NULL);
+
+      gimp_histogram_view_set_channel (t_tool->histogram_box->view,
+                                       channel);
+    }
+  else if (! strcmp (pspec->name, "low") ||
+           ! strcmp (pspec->name, "high"))
+    {
+      gdouble low;
+      gdouble high;
+      gint    n_bins;
+
+      g_object_get (config,
+                    "low",  &low,
+                    "high", &high,
+                    NULL);
+
+      n_bins = gimp_histogram_n_bins (t_tool->histogram);
+
+      gimp_histogram_view_set_range (t_tool->histogram_box->view,
+                                     low  * (n_bins - 0.0001),
+                                     high * (n_bins - 0.0001));
+    }
+}
+
+static gboolean
+gimp_threshold_tool_channel_sensitive (gint     value,
+                                       gpointer data)
+{
+  GimpDrawable         *drawable = GIMP_TOOL (data)->drawable;
+  GimpHistogramChannel  channel  = value;
+
+  if (!drawable)
+    return FALSE;
+
+  switch (channel)
+    {
+    case GIMP_HISTOGRAM_VALUE:
+      return TRUE;
+
+    case GIMP_HISTOGRAM_RED:
+    case GIMP_HISTOGRAM_GREEN:
+    case GIMP_HISTOGRAM_BLUE:
+      return gimp_drawable_is_rgb (drawable);
+
+    case GIMP_HISTOGRAM_ALPHA:
+      return gimp_drawable_has_alpha (drawable);
+
+    case GIMP_HISTOGRAM_RGB:
+      return gimp_drawable_is_rgb (drawable);
+
+    case GIMP_HISTOGRAM_LUMINANCE:
+      return gimp_drawable_is_rgb (drawable);
+    }
+
+  return FALSE;
+}
+
+static void
+gimp_threshold_tool_histogram_range (GimpHistogramView *widget,
+                                     gint               start,
+                                     gint               end,
+                                     GimpThresholdTool *t_tool)
+{
+  GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (t_tool);
+  gint            n_bins      = gimp_histogram_n_bins (t_tool->histogram);
+  gdouble         low         = (gdouble) start / (n_bins - 1);
+  gdouble         high        = (gdouble) end   / (n_bins - 1);
+  gdouble         config_low;
+  gdouble         config_high;
+
+  g_object_get (filter_tool->config,
+                "low",  &config_low,
+                "high", &config_high,
+                NULL);
+
+  if (low  != config_low ||
+      high != config_high)
+    {
+      g_object_set (filter_tool->config,
+                    "low",  low,
+                    "high", high,
+                    NULL);
+    }
+}
+
+static void
+gimp_threshold_tool_auto_clicked (GtkWidget         *button,
+                                  GimpThresholdTool *t_tool)
+{
+  GimpTool     *tool = GIMP_TOOL (t_tool);
+  GimpWaitable *waitable;
+
+  waitable = gimp_trivially_cancelable_waitable_new (
+    GIMP_WAITABLE (t_tool->histogram_async));
+
+  gimp_wait (tool->tool_info->gimp, waitable, _("Calculating histogram..."));
+
+  g_object_unref (waitable);
+
+  if (gimp_async_is_synced   (t_tool->histogram_async) &&
+      gimp_async_is_finished (t_tool->histogram_async))
+    {
+      GimpHistogramChannel channel;
+      gint                 n_bins;
+      gdouble              low;
+
+      g_object_get (GIMP_FILTER_TOOL (t_tool)->config,
+                    "channel", &channel,
+                    NULL);
+
+      n_bins = gimp_histogram_n_bins (t_tool->histogram);
+
+      low = gimp_histogram_get_threshold (t_tool->histogram,
+                                          channel,
+                                          0, n_bins - 1);
+
+      gimp_histogram_view_set_range (t_tool->histogram_box->view,
+                                     low, n_bins - 1);
+    }
+}