crm.fsf.org/20131203/files/sites/all/modules-old/civicrm/bower_components/qunit/addons/canvas/README.md

   1 Canvas - A QUnit Addon For Testing Canvas Rendering
   2 ================================
   3
   4 This addon for QUnit adds a pixelEqual method that allows you to assert
   5 individual pixel values in a given canvas.
   6
   7 Usage:
   8
   9     pixelEqual(canvas, x, y, r, g, b, a, message)
  10
  11 Where:
  12
  13   * canvas: Reference to a canvas element
  14   * x, y: Coordinates of the pixel to test
  15   * r, g, b, a: The color and opacity value of the pixel that you except
  16   * message: Optional message, same as for other assertions