EGL_ANGLE_sync_control_rate
https://www.khronos.org/registry/egl/specs/eglspec.1.5.pdf
EGL_ANGLE_sync_control_rate

	EGLBoolean eglGetMscRateANGLE (EGLDisplay dpy, EGLSurface surface, EGLint* numerator, EGLint* denominator)