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1. 发明申请

US20070257905A1 Optimizing a graphics rendering pipeline using early Z-mode 有权
标题翻译：使用早期Z模式优化图形渲染管道
公开(公告)号：US20070257905A1
公开(公告)日：2007-11-08
申请号：US11430635
申请日：2006-05-08
申请人： Mark French , Emmett Kilgariff , Steven Molnar , Walter Steiner , Douglas Voorhies , Adam Weitkemper
发明人： Mark French , Emmett Kilgariff , Steven Molnar , Walter Steiner , Douglas Voorhies , Adam Weitkemper
IPC分类号： G06T15/00
CPC分类号： G06T15/405 , G06T15/005
摘要： One embodiment of the present invention sets forth an architecture for optimizing graphics rendering efficiency by advancing the Z-test operation prior to pixel shading whenever possible. The current rendering state, as maintained by the setup engine, determines whether advancing the Z-test function above the shader engine for “early” Z-testing is possible or whether the Z-test function should be deferred until after shading operations for “late” Z-testing. Data is dynamically routed to each processing engine in the pipeline, so that the appropriate data flow for either early Z or late Z is dynamically constructed, as determined by the current rendering state. Efficiency is gained by relieving the shader engine of unnecessary work whenever possible by discarding pixels before they enter the shader engine. The same functional units are utilized in both early Z and late Z configurations, minimizing any additional hardware required for implementation.
摘要翻译：本发明的一个实施例提出了一种用于通过在可能的情况下在像素着色之前推进Z检验操作来优化图形渲染效率的架构。由设置引擎维护的当前呈现状态确定是否可以在着色引擎之上前进Z检验功能以进行“早期”Z检验，或者Z检验功能是否应该延迟到“晚期”的阴影操作之后 “Z测试。数据在流水线中动态地路由到每个处理引擎，以便由当前呈现状态确定的早期Z或后期Z的适当数据流是动态构造的。通过在进入着色引擎之前丢弃像素，尽可能地减轻不必要的工作的着色引擎来获得效率。早期Z和晚Z配置都使用相同的功能单元，从而最大限度地减少了实施所需的任何其他硬件。

2. 发明授权

US5704024A Method and an apparatus for generating reflection vectors which can be unnormalized and for using these reflection vectors to index locations on an environment map 失效
标题翻译：用于产生可以非规范化的反射矢量的方法和装置，以及使用这些反射矢量来索引环境地图上的位置
公开(公告)号：US5704024A
公开(公告)日：1997-12-30
申请号：US504773
申请日：1995-07-20
申请人： Douglas Voorhies , James Foran
发明人： Douglas Voorhies , James Foran
IPC分类号： G06T15/50
CPC分类号： G06T15/506
摘要： An apparatus for generating a reflection from a three-dimensional environment map. The apparatus includes a reflection vector generator which receives an eye vector and a normal vector neither of which need be normalized. This reflection vector generator generates a reflection vector without vector normalization. The reflection vector generator then couples to a decoder to supply the generated reflection vector. The decoder, in turn, determines a location where the reflection vector indexes the selected 2-dimensional map which forms part of the environment map.
摘要翻译：一种用于从三维环境图生成反射的装置。该装置包括反射矢量发生器，其接收不需要归一化的眼矢量和法向量。该反射矢量发生器产生无矢量归一化的反射矢量。然后，反射矢量发生器耦合到解码器以提供所生成的反射矢量。解码器依次确定反射矢量对形成环境图的一部分的所选择的二维地图进行索引的位置。

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