class MASKING_DLL_DECLSPEC TripleBuffer

The Triple Buffering screen update driver.

Inheritance:

TripleBuffer - PageFlipping - ScreenUpdate

Public Methods

Error Create()

If triple buffering is available, this function tries to turn it on and creates three video pages

void Destroy()

Destroys the video pages

void Redraw()

Requests the active page to be shown on screen, advances to the next page and returns without waiting for a vertical retrace

Protected Fields

BITMAP* page3

The third video page

int page

An index storing the number of the currently active page

Documentation

The Triple Buffering screen update driver. Triple buffering is very similar to page flipping. In fact triple buffering is just an extension of page flipping where a third video page is used to eliminate the need to wait for vertical synchronisation. In a triple buffering scheme one page is available for drawing (the active page), one contains the last completely drawn frame and is waiting for the next vertical retrace so it can be shown on screen and the third contains the previous frame and is at the time being drawn by the hardware onto the physical screen. Triple buffering is in most cases where the entire screen needs to be fully redrawn the fastest screen update method but is not available on all systems.

BITMAP* page3

The third video page

int page

An index storing the number of the currently active page

Error Create()

If triple buffering is available, this function tries to turn it on and creates three video pages

void Destroy()

Destroys the video pages

void Redraw()

Requests the active page to be shown on screen, advances to the next page and returns without waiting for a vertical retrace

This class has no child classes.

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