#593 Pixel perfect scaling broken in fullscreen

[mtf]

I recently upgraded from FCEUX 2.1.5 to 2.2.1, and I noticed that I can no longer achieve pixel perfect scaling in fullscreen mode. In 2.1.5, I could go into the Video settings, set a custom resolution, and set the "Scale dimensions by" values (e.g., 1920x1200, 5x5), and I would have pixel perfect scaling, where each "game pixel" was 5x5 "screen pixels".

The newer and simpler "Best Fit" Video option checkbox is certainly easier to use, but it doesn't seem to properly support pixel perfect scaling. Take a look at the attached screenshot. (It's from Battletoads, but all ROMs exhibit the same issue.) I've highlighted a few game pixels in red. Some are 5x5, some are 5x6, some are 6x5, and some are 6x6. It's subtle, but it makes the screen look distorted and odd.

With FCEUX 2.1.5, I could simply use the "Scale dimensions by" setting, and every game pixel would be 5x5. Am I missing something, or is this no longer possible? If not, might you consider adding an "perfect scaling" option for us pixel purists?

Thanks for all of your hard work, FCEUX is great :)

[AnS]

Implemented in r2940.
Please test this build: http://fceux.com/zip