Allow the scale to be configured based on the size of the canvas.
Allow the scale to be configured based on the size of the canvas.

For small canvases (like text) we likely want to use the default scale, but for
big canvases (like full-screen background images), we'll want to downsample.

KoriSamui/PlayN,KoriSamui/PlayN,KoriSamui/PlayN,KoriSamui/PlayN