PDFBOX-5660: optimize, as suggested by Valery Bokov; closes #224

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1928031 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/main/java/org/apache/pdfbox/contentstream/PDFStreamEngine.java

@@ -199,14 +199,15 @@ public void showForm(PDFormXObject form) throws IOException
     protected void processSoftMask(PDTransparencyGroup group) throws IOException
     {
         saveGraphicsState();
-        Matrix softMaskCTM = getGraphicsState().getSoftMask().getInitialTransformationMatrix();
-        getGraphicsState().setCurrentTransformationMatrix(softMaskCTM);
-        getGraphicsState().setTextMatrix(new Matrix());
-        getGraphicsState().setTextLineMatrix(new Matrix());
-        getGraphicsState().setNonStrokingColorSpace(PDDeviceGray.INSTANCE);
-        getGraphicsState().setNonStrokingColor(PDDeviceGray.INSTANCE.getInitialColor());
-        getGraphicsState().setStrokingColorSpace(PDDeviceGray.INSTANCE);
-        getGraphicsState().setStrokingColor(PDDeviceGray.INSTANCE.getInitialColor());
+        PDGraphicsState graphicsState = getGraphicsState();
+        Matrix softMaskCTM = graphicsState.getSoftMask().getInitialTransformationMatrix();
+        graphicsState.setCurrentTransformationMatrix(softMaskCTM);
+        graphicsState.setTextMatrix(new Matrix());
+        graphicsState.setTextLineMatrix(new Matrix());
+        graphicsState.setNonStrokingColorSpace(PDDeviceGray.INSTANCE);
+        graphicsState.setNonStrokingColor(PDDeviceGray.INSTANCE.getInitialColor());
+        graphicsState.setStrokingColorSpace(PDDeviceGray.INSTANCE);
+        graphicsState.setStrokingColor(PDDeviceGray.INSTANCE.getInitialColor());
 
         try
         {