Add cut out option

Author: glibas

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

@@ -173,6 +173,38 @@ public PageSnapshot cropAround(WebElement element, int offsetX, int offsetY) {
         return this;
     }
 
+    /**
+     * Cut out specified element with offset.
+     *
+     * @param element WebElement to crop
+     * @param offsetX offsetX around element in px
+     * @param offsetY offsetY around element in px
+     * @return instance of type PageSnapshot
+     */
+    public PageSnapshot cutOut(WebElement element, int offsetX, int offsetY) {
+        try {
+            image = ImageProcessor.cutOut(image, new Coordinates(element, devicePixelRatio), offsetX, offsetY);
+        } catch (RasterFormatException rfe) {
+            throw new ElementOutsideViewportException(ELEMENT_OUT_OF_VIEWPORT_EX_MESSAGE, rfe);
+        }
+        return this;
+    }
+
+    /**
+     * Cut out specified element.
+     *
+     * @param element WebElement to crop
+     * @return instance of type PageSnapshot
+     */
+    public PageSnapshot cutOut(WebElement element) {
+        try {
+            image = ImageProcessor.cutOut(image, new Coordinates(element, devicePixelRatio), 0, 0);
+        } catch (RasterFormatException rfe) {
+            throw new ElementOutsideViewportException(ELEMENT_OUT_OF_VIEWPORT_EX_MESSAGE, rfe);
+        }
+        return this;
+    }
+
     @Override
     protected PageSnapshot self() {
         return this;

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

@@ -92,6 +92,13 @@ public static BufferedImage cropAround(BufferedImage sourceImage, Coordinates co
         return sourceImage.getSubimage(coords.getX() - offsetX, coords.getY() - offsetY, coords.getWidth() + offsetX * 2, coords.getHeight() + offsetY * 2);
     }
 
+    public static BufferedImage cutOut(BufferedImage sourceImage, Coordinates coords, int offsetX, int offsetY) {
+        Graphics bg = sourceImage.getGraphics();
+        bg.setColor(Color.white);
+        bg.fillRect(coords.getX() - offsetX, coords.getY() - offsetY, coords.getScrollWidth() + offsetX * 2, coords.getScrollHeight() + offsetY * 2);
+        return sourceImage;
+    }
+
     public static BufferedImage addTitle(BufferedImage sourceImage, String title, Color color, Font textFont) {
         int textOffset = 5;
         BufferedImage combined = new BufferedImage(sourceImage.getWidth(), sourceImage.getHeight() + textFont.getSize(), BufferedImage.TYPE_INT_ARGB);