5.3.3. eglChooseConfig always selects configurations that use the back buffer

The EGL specification enables you to specify whether to use the back buffer or not in the attribute list passed to eglCreateWindowSurface(). The GLX function for window surface creation does not permit this. The GLX function for choosing configurations lets you specify whether you want to use a back buffer or not. The EGL implementation uses this function to select only those configurations that enable use of the back buffer. As a side effect of this, applications cannot disable use of the back buffer.

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