3D OpenGL Acceleration For Windows Guests On QEMU Using VirGL/VirtIO

While there has been VirGL as one of the options for allowing 3D/OpenGL acceleration of Linux guests within QEMU/KVM virtual machines to allow the calls to be directed to the host system's OpenGL driver, that support hasn't been available when Windows is running as QEMU/KVM guest. That is changing though thanks in large part to this year's Google Summer of Code...