A graphics subsystem which permits single buffered windows to exist in a double buffered system. Thus ALL the pixels on the screen are ultimately double buffered, but the single buffered should not appear to be double buffered. To support the single buffered windows, certain write operations are...http://www.google.com/patents/US5742796?utm_source=gb-gplus-sharePatent US5742796 - Graphics system with color space double buffering
