FRAMEWORK FOR GRAPHICS ANIMATION AND COMPOSITING O

专利名称：FRAMEWORK FOR GRAPHICS ANIMATION

AND COMPOSITING OPERATIONS

发明人：BRUNNER, Ralph,HARPER,

John,GRAFFAGNINO, Peter, N.

申请号：EP07813320.4申请日：20070724公开号：EP2047432A1公开日：20090415

摘要：A framework for performing graphics animation and compositing operationshas a layer tree for interfacing with the application and a render tree for interfacing witha render engine. Layers in the layer tree can be content, windows, views, video, images,text, media, or any other type of object for a user interface of an application. Theapplication commits change to the state of the layers of the layer tree. The applicationdoes not need to include explicit code for animating the changes to the layers. Instead,an animation is determined for animating the change in state. In determining the

animation, the framework can define a set of predetermined animations based on motion,visibility, and transition. The determined animation is explicitly applied to the affectedlayers in the render tree. A render engine renders from the render tree into a framebuffer for display on the processing device. Those portions of the render tree that havechanged relative to prior versions can be tracked to improve resource management.

申请人：Apple Inc.

地址：1 Infinite Loop Cupertino, CA 95014 US

国籍：US

代理机构：Wombwell, Francis

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