Double Buffering: Difference between revisions

Tearing can usually be ignored in general applications (office suites, web browsers, terminals) since the entire screen isn't constantly being updated. However, it still occurs, for example dragging a window around fast in a window manager that does not account for tearing.

 

Vertical synchronization ([http://en.wikipedia.org/wiki/Vertical_synchronization Wikipedia]),more commonly known as V-Sync, is when the frame rate is synchronized to match the vertical refresh rate of the screen. This means the double buffer is copied to screen's buffer in a small period between frames known as the [http://en.wikipedia.org/wiki/Vertical_blanking_interval vertical blanking interval]. By updating the screen's buffer between frames, you ensure that only full frames are shown at a time.

 

 

An example of vertical syncronization is as follows:

/* handle VBLANK, called by the interrupt handler */

void vga_handleVBlank()