Feat/rasterizer update 21

This feature update adds logging to the current implementation of the rendering package. It also includes minor refactorings in the FunctionalRenderingBase and ImageRasterizer. (No changes in functionality) Please review.

src/main/java/de/tudresden/inf/mci/brailleplot/rendering/ImageRasterizer.java

@@ -89,7 +89,7 @@ public class ImageRasterizer implements Rasterizer<Image> {
 
         mLogger.info("Rasterizing Image {}", imgData);
 
-        mLogger.trace("Retrieving buffered image.");
+        mLogger.trace("Retrieving buffered image");
         // First, a readable representation of the is retrieved.
         BufferedImage imgBuf = imgData.getBufferedImage();
 
@@ -159,7 +159,7 @@ public class ImageRasterizer implements Rasterizer<Image> {
                 }
             }
         }
-        mLogger.trace("Done!");
+        mLogger.trace("Finished scanning the image");
     }
 
     private void quantifiedPositionMapping(final BufferedImage imgBuf, final RasterCanvas canvas) {
@@ -170,8 +170,8 @@ public class ImageRasterizer implements Rasterizer<Image> {
 
         // Instead of using the dot rectangle a rectangle representing the target printing space in millimeters
         // is built from the canvas information.
-        mLogger.trace("Determining available area (in mm):");
         Rectangle availableArea = new Rectangle(0, 0, canvas.getPrintableWidth(), canvas.getPrintableHeight());
+        mLogger.trace("Determined available area (in mm): {}", availableArea);
 
         // Calculate the ratios between original image and target printable area. (mm / pixel)
         double hRatio =  (availableArea.getWidth() / imgBuf.getWidth());
@@ -212,7 +212,7 @@ public class ImageRasterizer implements Rasterizer<Image> {
                 }
             }
         }
-        mLogger.trace("Done!");
+        mLogger.trace("Finished scanning the image");
     }