Create the stencil buffer automatically on SDL

[FloatingBanana]

Summary

After a lot of research, I found that SDL doesn't create the stencil buffer by default. It took me a while to find that I need to call Silk.NET.Windowing.Sdl.SdlWindowing.GetExistingApi(window).GLSetAttribute(Silk.NET.SDL.GLattr.GLStencilSize, 8) before window.Run() to make the stencil work.

I think it would save a lot of people time if Silk made that automatically when creating the window. It shouldn't be a problem since GLFW already creates the stencil buffer by default.

Comments

If you don't like the idea of creating it by default, it could also be when the user sets the PreferredStencilBufferBits on the WindowOptions object.

[Perksey]

Silk.NET makes no guarantees on what the underlying platform does by default. PreferredStencilBufferBits should do what you want, if not then we need to fix that!

[FloatingBanana]

I also thought that PreferredStencilBufferBits would be enough, but apparently it's completely ignored unless I call GLSetAttribute.

[Perksey]

#660 should fix the bug wherein PreferredStencilBufferBits doesn't work. We don't have any plans to add any automatic creation of this buffer (platform defaults remain undefined so if you want your window to have something, specify it using a property such as this one)

This fix will be part of 2.10 (releasing Friday). Hope this helps!