Font cache causing memory leak

[t-geindre]

Ebitengine Version

master

Operating System

• [ ] Windows
• [ ] macOS
• [X] Linux
• [ ] FreeBSD
• [ ] OpenBSD
• [ ] Android
• [ ] iOS
• [ ] Nintendo Switch
• [ ] PlayStation 5
• [ ] Xbox
• [ ] Web Browsers

Go Version (go version)

1.23

What steps will reproduce the problem?

When calling

text.DrawWithOptions(screen, "some text", myFace, opts)

Font is cached here I'm working on an application using a lot of various fonts and I can't keep all of them loaded.

What is the expected result?

Memory usage remains stable.

What happens instead?

Memory is leaking.

Anything else you feel useful to add?

I couldn't find a way to clear this cache. Here is what I found when debugging the memory usage:

[t-geindre]

For now, I'm solving the issue like this:

//go:linkname FontCache github.com/hajimehoshi/ebiten/v2/text.faceWithCacheCache
var FontCache map[font.Face]any

func switchFont() {
     // loading new one, removing old one, and then clear ebiten cache
     delete(FontCache, oldFont)
}

[hajimehoshi]

https://github.com/hajimehoshi/ebiten/issues/498