I want to get some clarification on the BACKSYSTEM, BACKVIDEO and FRONTONLY.
Here is my understanding: BACKSYSTEM uses a virtual framebuffer of the screen (Some place in RAM) and DirectFB draws on this screen (surface), once a Flip is called the virtual framebuffer is copied to the Real/Visible framebuffer. BACKVIDEO use the off screen video memory and draws in the screen (surface) that is off screen. When a Flip is called the framebuffer starting position is changed to the off screen position to make the screen visible. The next frame is draw on the off screen and the process is repeated. FRONTONLY, draw directly to the visible framebuffer. Thanks, Craig Craig Matsuura - Principal Engineer Control4 11734 South Election Road - Suite 200 Salt Lake City, UT 84020-6432 PH: 801-523-3161 FX: 801-523-3199
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