Method and system for an external front buffer for a graphical system

摘要

A system (100) for displaying images in at least one display window (202-206) on a display unit (106) includes a display processor (101) configured to generate graphics commands from a received input. A graphics processing unit (102) is coupled to the display processor and includes rendering engine (109) configured to generate graphic data from the graphics commands, an internal memory (107) coupled to the rendering engine, and a general purpose I/O (110) coupled to the rendering engine and configured to transmit messages from the graphics processing unit (102). A graphics logic device (104) is coupled to the graphics processing unit (102). The graphics logic device (104) is configured to initiate a transfer of graphic data for an update of a display window (202-206) from the internal memory (107) to the display unit (106) upon receipt of a message indicative of an available update to the display window. An external memory (105) is coupled to the graphics logic device (104) and the external memory (105) is configured to supply graphic data to the display window (202-206) when the update of the display window (202-206) is not available and to store the update of the display window (202-206) when the display window (202-206) receives the update from the internal memory (107).