This is a drop in polyfill to make "auto" retina consistent across all browsers (not just safari), no need to modify your canvas source, just drop this in before running your canvas code.
https://github.com/jondavidjohn/hidpi-canvas-polyfill
This is a drop in polyfill to make "auto" retina consistent across all browsers (not just safari), no need to modify your canvas source, just drop this in before running your canvas code.
https://github.com/jondavidjohn/hidpi-canvas-polyfill