How to take partial screenshot (frame) with Selenium WebDriver?

Question

Is it possible to take a screenshot with WebDriver of only one frame (not the complete window) within a frameset?

Alternatively, is it possible to define coordinate

Answer 1

Ruby solution

Setup

Install xvfb

apt-get install xvfb -y

Install headless browser and image manipulation gem

gem install chunky_png
gem install headless
gem install selenium-webdriver

Install chrome driver

wget http://chromedriver.googlecode.com/files/chromedriver_linux64_.zip
apt-get install unzip
unzip chromedriver_linux64_.zip
cp chromedriver /usr/local/bin

More info can be found here

Code

#!/usr/bin/env ruby

require "headless"
require "selenium-webdriver"
require 'chunky_png'

headless = Headless.new
headless.start

site = "?_some_site_?"

driver = Selenium::WebDriver.for :chrome
driver.navigate.to site
sleep 1
driver.save_screenshot('screenshot.png')

el= driver.find_element(:xpath, '?_some_xpath_?')

image = ChunkyPNG::Image.from_file('screenshot.png')

image.crop!(el.location.x + 1, el.location.y + 1, el.size.width, el.size.height)
image.save('croped.png')

driver.quit
headless.destroy