Add support for aspect ratio correction

[olafkryus]

While it is true that the game used 320×200 px VGA video mode for graphics display, at the time of it's release all such software was meant to be displayed on a 4:3 CRT monitor. This pull request add an Alt+A keyboard shortcut for switching between the square-pixel 16:10 aspect ratio and the intended-but-stretched 4:3 aspect ratio. A similar option is available e.g. in the recent Android port of Deluxe Ski Jump 2 and works quite well there.

The default display mode is left unchanged, as without anti-aliasing the 4:3 mode looks rather wobbly at the default scaling ratio. However when aspect ratio correction is enabled on a 1600×1200 px display, it should give a nice and round 5:6 horizontal to vertical pixel scaling ratio, resulting in a sharp picture.

[veikkos]

Thanks for the addition. I would rename the feature in console/readme to "Toggle 4:3 aspect ratio" or similar so that it's more describing.

[olafkryus]

That's a good point. I've changed the feature name in all places.

[veikkos]

Thanks for this.

Are you @olafkryus planning to do other fixes? We could bundle all near future fixes in to single release.

[veikkos]

Feature released in SJ313-SP4.