Programming With QuickTime VR

Cache Sizes

The cacheSize parameter to the QTVRGetBackBufferSettings and QTVRSetBackBufferPrefs functions specifies the size of the panorama back buffer. You can use these constants to specify a cache size:



 
enum {

    kQTVRMinimumCache                               = -1,

    kQTVRSuggestedCache                             = 0,

    kQTVRFullCache                                  = 1

};

Constant descriptions

kQTVRMinimumCache: The minimum cache size required to display the specified movie.
kQTVRSuggestedCache: The suggested cache size, a cache large enough to allow full zooming out of the panorama.
kQTVRFullCache: The full cache size (that is, a cache that is large enough to fit the entire panorama in memory). This is the default cache size.