PDFBOX-5660: optimize, as suggested by Valery Bokov, closes #364

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1930398 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/main/java/org/apache/pdfbox/rendering/PageDrawer.java

@@ -1084,7 +1084,8 @@ public void drawImage(PDImage pdImage) throws IOException
         {
             return;
         }
-        Matrix ctm = getGraphicsState().getCurrentTransformationMatrix();
+        PDGraphicsState graphicsState = getGraphicsState();
+        Matrix ctm = graphicsState.getCurrentTransformationMatrix();
         AffineTransform at = ctm.createAffineTransform();
 
         if (!pdImage.getInterpolate())
@@ -1113,12 +1114,12 @@ public void drawImage(PDImage pdImage) throws IOException
             }
         }
 
-        graphics.setComposite(getGraphicsState().getNonStrokingJavaComposite());
+        graphics.setComposite(graphicsState.getNonStrokingJavaComposite());
         setClip();
 
         if (pdImage.isStencil())
         {
-            if (getGraphicsState().getNonStrokingColor().getColorSpace() instanceof PDPattern)
+            if (graphicsState.getNonStrokingColor().getColorSpace() instanceof PDPattern)
             {
                 // The earlier code for stencils (see "else") doesn't work with patterns because the
                 // CTM is not taken into consideration.
@@ -1497,21 +1498,23 @@ public void shadingFill(COSName shadingName) throws IOException
             LOG.error("shading {} does not exist in resources dictionary", shadingName);
             return;
         }
-        Matrix ctm = getGraphicsState().getCurrentTransformationMatrix();
+        PDGraphicsState graphicsState = getGraphicsState();
+        Matrix ctm = graphicsState.getCurrentTransformationMatrix();
 
-        graphics.setComposite(getGraphicsState().getNonStrokingJavaComposite());
+        graphics.setComposite(graphicsState.getNonStrokingJavaComposite());
         Shape savedClip = graphics.getClip();
         graphics.setClip(null);
         lastClips = null;
 
         // get the transformed BBox and intersect with current clipping path
         // need to do it here and not in shading getRaster() because it may have been rotated
         PDRectangle bbox = shading.getBBox();
+        Area currentClippingPath = graphicsState.getCurrentClippingPath();
         Area area;
         if (bbox != null)
         {
             area = new Area(bbox.transform(ctm));
-            area.intersect(getGraphicsState().getCurrentClippingPath());
+            area.intersect(currentClippingPath);
         }
         else
         {
@@ -1523,18 +1526,18 @@ public void shadingFill(COSName shadingName) throws IOException
                 bounds.add(new Point2D.Double(Math.ceil(bounds.getMaxX() + 1),
                         Math.ceil(bounds.getMaxY() + 1)));
                 area = new Area(bounds);
-                area.intersect(getGraphicsState().getCurrentClippingPath());
+                area.intersect(currentClippingPath);
             }
             else
             {
-                area = getGraphicsState().getCurrentClippingPath();
+                area = currentClippingPath;
             }
         }
         if (!area.isEmpty())
         {
             // creating Paint is sometimes a costly operation, so avoid if possible
             Paint paint = shading.toPaint(ctm);
-            paint = applySoftMaskToPaint(paint, getGraphicsState().getSoftMask());
+            paint = applySoftMaskToPaint(paint, graphicsState.getSoftMask());
             graphics.setPaint(paint);
             graphics.fill(area);
         }