util move around

src/main/java/stirling/software/SPDF/utils/ImageProcessingUtils.java

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+package stirling.software.SPDF.utils;
+
+import java.awt.image.BufferedImage;
+
+public class ImageProcessingUtils {
+
+	static BufferedImage convertColorType(BufferedImage sourceImage, String colorType) {
+	    BufferedImage convertedImage;
+	    switch (colorType) {
+	        case "greyscale":
+	            convertedImage = new BufferedImage(sourceImage.getWidth(), sourceImage.getHeight(), BufferedImage.TYPE_BYTE_GRAY);
+	            convertedImage.getGraphics().drawImage(sourceImage, 0, 0, null);
+	            break;
+	        case "blackwhite":
+	            convertedImage = new BufferedImage(sourceImage.getWidth(), sourceImage.getHeight(), BufferedImage.TYPE_BYTE_BINARY);
+	            convertedImage.getGraphics().drawImage(sourceImage, 0, 0, null);
+	            break;
+	        default:  // full color
+	            convertedImage = sourceImage;
+	            break;
+	    }
+	    return convertedImage;
+	}
+
+}