QuickTime 4 Reference

Hardware Cursors

The Image Compression Manager supports hardware cursors introduced in PCI-based Macintosh computers, which eliminates cursor flicker. For all software codecs, this support requires no changes.

For codecs that manage the cursor themselves, QuickTime 2.1 added a flag, codecCompletionDontUnshield , for use when calling the ICMDecompressComplete function. Use this flag to prevent the Image Compression Manager from unshielding the cursor when ICMDecompressComplete is called.