Final Fantasy Tactics: The War of the Lions

[Constrained]

I'm getting graphical glitches on my laptop that I don't get on my android phone. In battles or similar scenes, I get triangles that lasts for a frame or two. I've attached some images that show what they look like. The glitches aren't limited to the triangles in them, rather they appear all over the battle field. This happens in any battle or scene where characters are displayed similarly to a battle.

When I run it on my phone, the game runs slower but without these glitches. My PC emulator's settings in the screenshots are the default ones. I've tried messing around, but I can't seem to remove the glitches. Is there some way I can fix this?