Takes a snapshot of the given area of the given frame buffer.
Unlike the other snapshot methods, this one is processed immediately and doesn't wait for the next render.
Snapshots work by using the WebGL
readPixels feature to grab every pixel from the frame buffer into an ArrayBufferView.
It then parses this, copying the contents to a temporary Canvas and finally creating an Image object from it,
which is the image returned to the callback provided. All in all, this is a computationally expensive and blocking process,
which gets more expensive the larger the canvas size gets, so please be careful how you employ this in your game.
The framebuffer to grab from.
The width of the framebuffer.
The height of the framebuffer.
The Function to invoke after the snapshot image is created.
Grab a single pixel as a Color object, or an area as an Image object?
The x coordinate to grab from.
The y coordinate to grab from.
The width of the area to grab.
The height of the area to grab.
The format of the image to create, usually
The image quality, between 0 and 1. Used for image formats with lossy compression, such as
This WebGL Renderer.