Exemple #1
0
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;
}
Exemple #2
0
static gboolean
gimp_histogram_editor_validate (GimpHistogramEditor *editor)
{
  if (! editor->valid && editor->histogram)
    {
      if (editor->drawable)
        gimp_drawable_calculate_histogram (editor->drawable, editor->histogram);
      else
        gimp_histogram_calculate (editor->histogram, NULL, NULL);

      gimp_histogram_editor_info_update (editor);

      editor->valid = TRUE;
    }

  return editor->valid;
}