Returns a CanvasImageData object with the given dimensions in CSS pixels.
retVal = object.createImageData(width, height);
- width [in]
The width of the new object, in CSS pixels.
- height [in]
The height of the new object, in CSS pixels.
- The canvas element, Section 13
When the CanvasImageData object is first created, it contains only pixels that are set to transparent black.