SDL_GL_GetCurrentContext - Man Page

#include <SDL3/SDL_video.h>

SDL_GLContext SDL_GL_GetCurrentContext(void);

Returns the currently active OpenGL context or NULL on failure; call SDL_GetError() for more information.

This function should only be called on the main thread.

This function is available since SDL 3.2.0.

SDL_GL_MakeCurrent(3)