Schedules a snapshot of the entire game viewport to be taken after the current frame is rendered.
To capture a specific area see the
snapshotArea method. To capture a specific pixel, see
Only one snapshot can be active per frame. If you have already called
snapshotPixel, for example, then
calling this method will override it.
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 Function to invoke after the snapshot image is created.
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.