PDFBOX-5660: optimize, as suggested by Valery Bokov; closes #233

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1928116 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/main/java/org/apache/pdfbox/pdmodel/common/function/PDFunctionType0.java

@@ -441,9 +441,10 @@ public float[] eval(float[] input) throws IOException
         {
             PDRange domain = getDomainForInput(i);
             PDRange encodeValues = getEncodeForParameter(i);
-            input[i] = clipToRange(input[i], domain.getMin(), domain.getMax());
-            input[i] = interpolate(input[i], domain.getMin(), domain.getMax(), 
-                    encodeValues.getMin(), encodeValues.getMax());
+            float min = domain.getMin();
+            float max = domain.getMax();
+            input[i] = clipToRange(input[i], min, max);
+            input[i] = interpolate(input[i], min, max, encodeValues.getMin(), encodeValues.getMax());
             input[i] = clipToRange(input[i], 0, sizeValues[i] - 1);
             inputPrev[i] = (int) Math.floor(input[i]);
             inputNext[i] = (int) Math.ceil(input[i]);