kc3-lang/SDL

2015-02-02T01:05:41

X11: Fixes for OpenGL 3.0 and later context creation. - Don't create a temporary context first; this was probably due to Windows needing one to get the address of wglCreateContextAttribsARB(), but that's a unique quirk of WGL, and doesn't apply to glX. The glX spec explicitly says you have to get a function pointer that works with any context from glXGetProcAddress(), including when no context exists. - Properly check for the GLX_ARB_create_context instead of just looking for a non-NULL glXCreateContextAttribsARB()...some implementations, like Mesa, never return NULL for function lookups (Mesa returns pointers into a jump table that is filled out when the GL is initialized; since you can look up functions before you have a valid context, it can't definitely say a function isn't valid at that point).