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Loxrie / genplus-gx

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Suggestion: 16:9 correction (like in FCE Ultra GX, SNES 9X GX, etc) #66

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
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.

Original issue reported on code.google.com by hellohol...@gmail.com on 2 Feb 2010 at 5:14

GoogleCodeExporter commented 9 years ago 
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.

Original comment by ekeeke31@gmail.com on 3 Feb 2010 at 9:42

GoogleCodeExporter commented 9 years ago

Original comment by ekeeke31@gmail.com on 3 Feb 2010 at 9:43

GoogleCodeExporter commented 9 years ago 
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.

Original comment by ekeeke31@gmail.com on 3 Feb 2010 at 11:47

GoogleCodeExporter commented 9 years ago

Original comment by ekeeke31@gmail.com on 29 May 2010 at 7:59