Schedules a snapshot of the given pixel from the game viewport to be taken after the current frame is rendered.
To capture the whole game viewport see the
snapshot method. To capture a specific area, see
Only one snapshot can be active per frame. If you have already called
snapshotArea, for example, then
calling this method will override it.
Unlike the other two snapshot methods, this one will return a
Color object containing the color data for
the requested pixel. It doesn't need to create an internal Canvas or Image object, so is a lot faster to execute,
using less memory.
The x coordinate of the pixel to get.
The y coordinate of the pixel to get.
The Function to invoke after the snapshot pixel data is extracted.
This WebGL Renderer.