What does custom_viewport do?

[footwo]

Hi all

I’ve been playing with floob’s video manager tool in an effort to get a nice overlay/scanline effect on a 1080p setup. It works just fine but there are several aspects of the retroarch config that I cannot find documentation for despite lots of searching.

The custom_viewport is what’s bothering me, as I want to understand what it is doing. I cannot find documentation on this aspect of RA ANYWHERE. What exactly does it do and how does it work?

I can see the changes the script has made to my retroarch.cfg files for each system, and this parameter is always present but I have no idea what it’s doing. Any help would be greatly appreciated.

Thanks!

[herbfargus]

It allows you to stretch the aspect ratio to fit the screen or make the screen smaller to fit a custom overlay. It does what it sounds like- a custom viewport.

[Floob]

@footwo – As herbfargus says, it specifies the viewing or display area

custom_viewport_width = How wide the output screen should be
custom_viewport_height = How tall/high the output screen should be
custom_viewport_x = The pixel position (horizontal) of the top left location of the output
custom_viewport_y = The pixel position (vertical) of the top left location of the output

Some more info:
http://smartretro.co.uk/forums/viewtopic.php?f=3&t=52#p159

[footwo]

Thanks for the responses guys, I get it now!

[Author]

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