fix NaN issue in gimpoperationlevels.c

2012-05-09 02:24:12 +02:00
parent bd3f892f79
commit 8482fb9cf6
1 changed files with 3 additions and 0 deletions
--- a/app/gegl/gimpoperationlevels.c
+++ b/app/gegl/gimpoperationlevels.c
@ -86,6 +86,9 @@ gimp_operation_levels_map (gdouble value,
                           gdouble low_output,
                           gdouble high_output)
 {
+  /* clamp to guard pow() against negative input */
+  value = MAX (value, low_input);
+
  /*  determine input intensity  */
  if (high_input != low_input)
    value = (value - low_input) / (high_input - low_input);