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Ronie Salgado The GL Renderer current context tracking fails when one window is used with an SDL renderer but another separate window is used with a user handled OpenGL context. Attached is a small program that reproduces this bug, at least in some Linux machines where an OpenGL renderer is provided by default. Expected Output: -"First window" should be blue. -"Second window" should be green. Gotten Output: - "First window" black. - "Second window" blue. What happened: The renderer created for the "first window" ends rendering into the "second window" OpenGL context. Bug location: SDL_render_gl.c - line 286 on hg: static SDL_GLContext SDL_CurrentContext = NULL; When making SDL_GL_MakeCurrent from the user perspective, that variable or the GL renderer is not notified about the OpenGL context change. Solution proposal: - Move the current GL context cache into another place global.