Fix cropping thumbnail

Author: glibas

src/main/java/com/assertthat/selenium_shutterbug/core/Snapshot.java

@@ -133,6 +133,19 @@ public T withCroppedThumbnail(double scale, double cropWidth, double cropHeight)
         return withCroppedThumbnail(Paths.get(location.toString(), "./thumbnails").toString(), "thumb_" + fileName, scale,cropWidth,cropHeight);
     }
 
+    /**
+     * Generate cropped thumbnail of the original screenshot.
+     * Will save different thumbnails depends on when it was called in the chain.
+     *
+     * @param scale to apply
+     * @param maxWidth max width in pixels. If set to -1 the actual image width is used
+     * @param maxHeight max height in pixels. If set to -1 the actual image height is used
+     * @return instance of type Snapshot
+     */
+    public T withCroppedThumbnail(double scale, int maxWidth, int maxHeight) {
+        return withCroppedThumbnail(Paths.get(location.toString(), "./thumbnails").toString(), "thumb_" + fileName, scale, maxWidth,maxHeight);
+    }
+    
     /**
      * Generate a thumbnail of the original screenshot.
      * Will save different thumbnails depends on when it was called in the chain.

src/main/java/com/assertthat/selenium_shutterbug/utils/image/ImageProcessor.java

@@ -195,8 +195,8 @@ public static BufferedImage scale(BufferedImage source, double ratio) {
     }
 
     public static BufferedImage cropAndScale(BufferedImage source,double ratio, double cropWidth, double cropHeight) {
-        int w = source.getWidth();
-        int h = source.getHeight();
+        int w = (int) (source.getWidth() * ratio);
+        int h = (int) (source.getHeight() * ratio);
         BufferedImage scaledImage = getCompatibleImage(w, h, source);
         Graphics2D resultGraphics = scaledImage.createGraphics();
         resultGraphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
@@ -207,8 +207,8 @@ public static BufferedImage cropAndScale(BufferedImage source,double ratio, doub
     }
 
     public static BufferedImage cropAndScale(BufferedImage source,double ratio, int maxWidth, int maxHeight) {
-        int w = source.getWidth();
-        int h = source.getHeight();
+        int w = (int) (source.getWidth() * ratio);
+        int h = (int) (source.getHeight() * ratio);
         BufferedImage scaledImage = getCompatibleImage(w, h, source);
         Graphics2D resultGraphics = scaledImage.createGraphics();
         resultGraphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION,