Suggestion: 16:9 correction (like in FCE Ultra GX, SNES 9X GX, etc)

[Former user]

Original [issue 66](https://code.google.com/p/genplus-gx/issues/detail?id=66) created by hellohole100 on 2010-02-02T17:14:25.000Z:

I love this emulator, and I used to use it all the time back when I had a 4:3 tv, but when I got a 16:9 one, and noticed I couldn't use a 4:3 mode on that tv, I stopped using the emulator entirely. Sure, there are scaling possibilities that can make the image have the right aspect ratio, but it makes the picture messy and incorrectly scaled. It would be fantastic with a proper mode that will just add blank borders on the sides, and yet keep the same original rendering intact. Bilinear filtering will hide the incorrect scaling, but I would prefer to be able to use original rendering with no filters, to keep the picture as clear, sharp and original as possible.

[Former user]

Comment # 1 originally posted by ekeeke31 on 2010-02-03T09:42:35.000Z:

16:9 correction in other emulators IS using scaling and also alterates the original image in some ways, that's why it's always better to switch to 4:3 if you can. No matter how hard you want it, I'm afraid modern TVs (LCD stuff with no 4:3 option anymore) are not very good at reproducing the original feeling of these old consoles.

For your information, blank borders are not "added" : we simply downscale the rendered image by a (16:9)/(4:3) ratio to take the later 16:9 stretching (done by TV) in account and keep a 4:3 aspect ratio on 16:9 screens.

The problem with downscaling is that you got visual artefacts if no filtering is done, there is absolutely nothing we can do against that, image information is always lost when downscaling (in genesis plus gx, try disabling borders as well, it might help reducing artefacts)

Anyway, this feature is already implemented in the current build since some revisions, it is really only one single line of code to add.

[Former user]

Comment # 2 originally posted by ekeeke31 on 2010-02-03T09:43:23.000Z:

[Former user]

Comment # 3 originally posted by ekeeke31 on 2010-02-03T11:47:19.000Z:

On that note, I'm quite surprised modern TVs can not handle 4:3 image properly and not add black bars themselves, all 16:9 SDTV do that, this is called pillar-boxing technique.

Out of curiosity, have you tried to setup your Wii in 4:3 mode in the Wii settings ? It might be this option makes the Wii indicating the TV to "stretch" the video signal because it's supposed to be anamorphic 16:9.

As said above, you will always have better result by not altering the original image or faking a 16:9 image and let the TV hardware do the job.

[Former user]

Comment # 4 originally posted by ekeeke31 on 2010-05-29T19:59:05.000Z: