RA menu background doesn't disappear after resume to the game when using oga driver.

First and foremost consider this:

• Only RetroArch bugs should be filed here. Not core bugs or game bugs
• This is not a forum or a help section, this is strictly developer oriented

Description

I am using retroarch rgui menu with oga video driver on odroid go advance.
I set the menu scale to the full screen (3:2), but it will not disappear after resume to 4:3 games.

Steps to reproduce the bug

1. set the video driver to oga
2. set the menu driver to rgui
3. restart retroarch
4. set lock menu aspect ratio to fit screen (which is 3:2)
5. set aspect ratio to core provided in scaling
6. launch a 4:3 games like the king of fighter '98
7. toggle the retroarch menu then go back to the game, you will see the edge of menu didn't disappear.

Version/Commit

You can find this information under Information/System Information

• RetroArch: [1.8.9]

Environment information

• OS: [Void Linux on Odroid Go Advance]

Start by reproducing the issue with the oga video driver, rgui menu, 3:2 menu scaling, and core-provided 4:3 aspect ratio described in the steps. Compare the menu state before and after resuming the game. Done means the menu edge no longer remains visible after returning to the game.