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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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_DISPLAY_SHELL_UTILS_H__
+#define __GIMP_DISPLAY_SHELL_UTILS_H__
+
+
+void gimp_display_shell_get_constrained_line_params (GimpDisplayShell *shell,
+ gdouble *offset_angle,
+ gdouble *xres,
+ gdouble *yres);
+void gimp_display_shell_constrain_line (GimpDisplayShell *shell,
+ gdouble start_x,
+ gdouble start_y,
+ gdouble *end_x,
+ gdouble *end_y,
+ gint n_snap_lines);
+gdouble gimp_display_shell_constrain_angle (GimpDisplayShell *shell,
+ gdouble angle,
+ gint n_snap_lines);
+
+gchar * gimp_display_shell_get_line_status (GimpDisplayShell *shell,
+ const gchar *status,
+ const gchar *separator,
+ gdouble x1,
+ gdouble y1,
+ gdouble x2,
+ gdouble y2);
+
+
+#endif /* __GIMP_DISPLAY_SHELL_UTILS_H__ */