Is the -640 option still relevant for anything

[davidjoffe]

I think in theory it's the same as passing "-scale 2" but I'm not 100% sure of that. See also my new comments in main.cpp:

//-- Initialize graphics
//
// NOTE: Use 640x480 if you want to use the built-in editor (F4/F5)
// [dj2017-08] The above comment should in most situations no longer be relevant,
// and actually probably worse than what you'd now get with the default behavior.
// By default it now basically tries to create a window that is the largest
// window (that's a 320x200 ratio), so e.g. on a 1920x1080 screen you might
// by default get e.g. window that's a scale factor of 5, e.g. 1600x1000,
// which is MUCH nicer for level editing than 640x400! The 640 is I think partly
// a legacy stemming from the days where 640x480 was a standard/common video
// mode ... but I'm not sure if it might still be relevant/helpful on some
// platforms (OpenPandora?
// e.g. see discussion thread here which I don't fully follow
// https://pyra-handheld.com/boards/threads/dave-gnukem.79533/
// )
// I think in theory -640 should behave the same as if passing "-scale 2" now
// but my memory of this stuff is a little vague so this needs to be checked.