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diff --git a/MagickCore/fx.c b/MagickCore/fx.c
index 169110e3c76e6c5103240b1f764536f019b70e4e..e68260c2b884f5f22e7399d90e8a56479842da6f 100644 (file)
--- a/MagickCore/fx.c
+++ b/MagickCore/fx.c
@@ -3632,6 +3632,10 @@ static inline Quantum PlasmaPixel(RandomInfo *random_info,
 
   plasma=ClampToQuantum(pixel+noise*GetPseudoRandomValue(random_info)-
     noise/2.0);
+  if (plasma <= 0)
+    return((Quantum) 0);
+  if (plasma > QuantumRange)
+    return(QuantumRange);
   return(plasma);
 }