Update full page screenshot example

Author: kklisura

cdt-examples/src/main/java/com/github/kklisura/cdt/examples/FullPageScreenshotExample.java

@@ -1,13 +1,15 @@
 package com.github.kklisura.cdt.examples;
 
 import com.github.kklisura.cdt.launch.ChromeLauncher;
+import com.github.kklisura.cdt.protocol.commands.Emulation;
 import com.github.kklisura.cdt.protocol.commands.Page;
 import com.github.kklisura.cdt.protocol.types.page.CaptureScreenshotFormat;
 import com.github.kklisura.cdt.protocol.types.page.LayoutMetrics;
 import com.github.kklisura.cdt.protocol.types.page.Viewport;
 import com.github.kklisura.cdt.services.ChromeDevToolsService;
 import com.github.kklisura.cdt.services.ChromeService;
 import com.github.kklisura.cdt.services.types.ChromeTab;
+
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
@@ -21,9 +23,15 @@
  */
 public class FullPageScreenshotExample {
 
-  private static void captureFullPageScreenshot(Page page, String outputFilename) {
+  private static void captureFullPageScreenshot(ChromeDevToolsService devToolsService, Page page, String outputFilename) {
     final LayoutMetrics layoutMetrics = page.getLayoutMetrics();
 
+    final double width = layoutMetrics.getContentSize().getWidth();
+    final double height = layoutMetrics.getContentSize().getHeight();
+
+    final Emulation emulation = devToolsService.getEmulation();
+    emulation.setDeviceMetricsOverride(Double.valueOf(width).intValue(), Double.valueOf(height).intValue(), 1.0d, Boolean.FALSE);
+
     Viewport viewport = new Viewport();
     viewport.setScale(1d);
 
@@ -32,8 +40,8 @@ private static void captureFullPageScreenshot(Page page, String outputFilename)
     viewport.setY(0d);
 
     // Set a width, height of a page to take screenshot at
-    viewport.setWidth(layoutMetrics.getContentSize().getWidth());
-    viewport.setHeight(layoutMetrics.getContentSize().getHeight());
+    viewport.setWidth(width);
+    viewport.setHeight(height);
 
     dump(
         outputFilename,
@@ -60,7 +68,7 @@ public static void main(String[] args) {
         event -> {
           System.out.println("Taking screenshot...");
 
-          captureFullPageScreenshot(page, "screenshot.png");
+          captureFullPageScreenshot(devToolsService, page, "screenshot.png");
 
           System.out.println("Done!");