In practice, setting refresh top forces the viewer to invalidate the current frame from the top-left (or top-most Z-index) downward. This is crucial for eliminating "ghosting" where old frames linger in the buffer.
Most professional image viewers let you toggle this behavior. viewerframe mode refresh top
39 Comments. by: Jason Striegel. January 14, 2005. this one is for all the people who couldn't see the netcams from sunday's post. Geocamming — Unsecurity Cameras Revisited - Hackaday In practice, setting refresh top forces the viewer
// 3. Force a repaint starting from the top scanline buffer->setRefreshMode(REFRESH_MODE_TOP_DOWN); viewerframe mode refresh top