Also skips swapping the window system buffers in headless mode, as there may not be a surface which can be swapped in the first place. Instead, we call glFlush() at the end of a frame in this case.
Also skips swapping the window system buffers in headless mode, as there may not be a surface which can be swapped in the first place. Instead, we call glFlush() at the end of a frame in this case.