# HG changeset patch
# User Rik <rik@octave.org>
# Date 1380660608 25200
# Node ID 4f1dd8a980df91f6fa2c259c1458ef5c5cb79625
# Parent  76a6d7de4cbcc107b74b5828b48f3bf77fff4f6d
Clip OpenGL text rotations to range [0,360].

* libinterp/corefcn/txt-eng-ft.cc(rotation_to_mode): Add or subtract
increments of 360 degrees to put rotation into range [0,360].

diff --git a/libinterp/corefcn/txt-eng-ft.cc b/libinterp/corefcn/txt-eng-ft.cc
--- a/libinterp/corefcn/txt-eng-ft.cc
+++ b/libinterp/corefcn/txt-eng-ft.cc
@@ -949,6 +949,12 @@
 int
 ft_render::rotation_to_mode (double rotation) const
 {
+  // Clip rotation to range [0, 360]
+  while (rotation < 0)
+    rotation += 360.0;
+  while (rotation > 360.0)
+    rotation -= 360.0;
+
   if (rotation == 0.0)
     return ROTATION_0;
   else if (rotation == 90.0)
@@ -967,7 +973,6 @@
                            int _halign, int valign, double rotation,
                            const caseless_str& interpreter)
 {
-  // FIXME: clip "rotation" between 0 and 360
   int rot_mode = rotation_to_mode (rotation);
 
   halign = _halign;