macosx opgengl produces a black screen

[1bsyl]

using latest SDL3 version, macos intel + ventura 13.2
it seems:
./testsprite --renderer opengl
produces a black screen
(metal seems ok)

[icculus]

I'll check this on an M1 Mac and see if I can reproduce.

[slouken]

Nope, I'm still seeing this on an M1 mac. I'm not sure what's going on here, @icculus?

[icculus]

Seeing it here, too. Looking into it.

[icculus]

Haven't looked at the commit yet, but bisecting says this is where it broke:

dcd17f5

[icculus]

Ah, here's what's happening. This code...

https://github.com/libsdl-org/SDL/blob/main/src/render/SDL_render.c#L4007-L4015

...basically guarantees that we always have a render target bound (the new, logical render target magic) when we get to GL_RenderPresent, which calls SDL_GL_SwapWindow, which on Cocoa will fail to render to the screen if you have an FBO bound.

While I still believe this last detail might be a macOS bug, it's been happening since forever, and the solution is to not have the logical render target bound during present.

[slouken]

Ah, thanks for tracking that down!