公开(公告)号：US08862823B1

公开(公告)日：2014-10-14

申请号：US12340503

申请日：2008-12-19

申请人： David B. Glasco ,  Cass W. Everitt ,  David Kirk Mcallister ,  Emmett M. Kilgariff ,  George R. Lynch ,  James Roberts ,  Karan Mehra ,  Patrick R. Marchand ,  Peter B. Holmqvist ,  Steven E. Molnar

发明人： David B. Glasco ,  Cass W. Everitt ,  David Kirk Mcallister ,  Emmett M. Kilgariff ,  George R. Lynch ,  James Roberts ,  Karan Mehra ,  Patrick R. Marchand ,  Peter B. Holmqvist ,  Steven E. Molnar

IPC分类号： G06F12/00 ,  G06F13/00 ,  G06F13/28

CPC分类号： G06F12/0897 ,  G06F12/0848 ,  G06F12/1009 ,  G06F12/123 ,  G06F2212/1041 ,  G06F2212/401 ,  G06F2212/455 ,  G06F2212/466 ,  G06T1/60

摘要： One embodiment of the present invention sets forth a compression status cache configured to store compression information for blocks of memory stored within an external memory. A data cache unit is configured to request, in response to a cache miss, compressed data from the external memory based on compression information stored in the compression status bit cache. The compression status for active buffers is dynamically swapped into the compression status cache as needed. Different compression formats may be specified for one or more tiles within an active buffer. One advantage of the disclosed compression status cache is that a lame amount of attached memory may be allocated as compressible memory blocks, without incurring a corresponding die area cost because a portion of the compression status stored off chip in attached memory is cached in the compression status cache.

摘要翻译： 本发明的一个实施例提出了一种被配置为存储存储在外部存储器中的存储器块的压缩信息的压缩状态缓存。 数据高速缓存单元被配置为基于存储在压缩状态位高速缓存中的压缩信息，响应于高速缓存未命中来请求来自外部存储器的压缩数据。 活动缓冲区的压缩状态根据需要动态交换到压缩状态缓存。 可以为活动缓冲区内的一个或多个瓦片指定不同的压缩格式。 所公开的压缩状态高速缓存的一个优点是可以将大量附加存储器分配为可压缩存储器块，而不会引起相应的管芯区域成本，因为存储在附加存储器中的芯片外的存储器的一部分被缓存在压缩状态 缓存。

公开(公告)号：US08627041B2

公开(公告)日：2014-01-07

申请号：US12901452

申请日：2010-10-08

申请人： David B. Glasco ,  Peter B. Holmqvist ,  George R. Lynch ,  Patrick R. Marchand ,  Karan Mehra ,  James Roberts ,  Cass W. Everitt ,  Steven E. Molnar

发明人： David B. Glasco ,  Peter B. Holmqvist ,  George R. Lynch ,  Patrick R. Marchand ,  Karan Mehra ,  James Roberts ,  Cass W. Everitt ,  Steven E. Molnar

IPC分类号： G06F12/00 ,  G06F13/00

CPC分类号： G06F12/08 ,  G06F12/0875 ,  G06F12/1009 ,  G06F2212/401

摘要： One embodiment of the present invention sets forth a technique for performing a memory access request to compressed data within a virtually mapped memory system comprising an arbitrary number of partitions. A virtual address is mapped to a linear physical address, specified by a page table entry (PTE). The PTE is configured to store compression attributes, which are used to locate compression status for a corresponding physical memory page within a compression status bit cache. The compression status bit cache operates in conjunction with a compression status bit backing store. If compression status is available from the compression status bit cache, then the memory access request proceeds using the compression status. If the compression status bit cache misses, then the miss triggers a fill operation from the backing store. After the fill completes, memory access proceeds using the newly filled compression status information.

摘要翻译： 本发明的一个实施例提出了一种对包括任意数量的分区的虚拟映射的存储器系统中的压缩数据执行存储器访问请求的技术。 虚拟地址被映射到由页表项（PTE）指定的线性物理地址。 PTE被配置为存储压缩属性，其用于定位压缩状态位缓存内的对应物理存储器页的压缩状态。 压缩状态位缓存与压缩状态位后备存储一起操作。 如果从压缩状态位缓存获得压缩状态，则存储器访问请求使用压缩状态进行。 如果压缩状态位缓存未命中，则错误触发后备存储器的填充操作。 填充完成后，使用新填充的压缩状态信息进行内存访问。

公开(公告)号：US08605087B2

公开(公告)日：2013-12-10

申请号：US12167998

申请日：2008-07-03

申请人： Cass W. Everitt ,  Steven E. Molnar

发明人： Cass W. Everitt ,  Steven E. Molnar

IPC分类号： G06T15/50

CPC分类号： G06T15/503 ,  G06T11/40 ,  G06T2200/28 ,  G06T2210/52

摘要： A system and method for dynamically adjusting the pixel sampling rate during primitive shading can improve image quality or increase shading performance. Hybrid antialiasing is performed by selecting a number of shaded samples per pixel fragment. A combination of supersample and multisample antialiasing is used where a cluster of sub-pixel samples (multisamples) is processed for each pass through a fragment shader pipeline. The number of shader passes and multisamples in each cluster can be determined dynamically for each primitive based on rendering state.

公开(公告)号：US08605086B2

公开(公告)日：2013-12-10

申请号：US12167997

申请日：2008-07-03

申请人： Cass W. Everitt ,  Steven E. Molnar

发明人： Cass W. Everitt ,  Steven E. Molnar

IPC分类号： G06T15/50

CPC分类号： G06T11/40

摘要： A system and method for dynamically adjusting the pixel sampling rate during primitive shading can improve image quality or increase shading performance. Hybrid antialiasing is performed by selecting a number of shaded samples per pixel fragment. A combination of supersample and multisample antialiasing is used where a cluster of sub-pixel samples (multisamples) is processed for each pass through a fragment shader pipeline. The number of shader passes and multisamples in each cluster can be determined dynamically for each primitive based on rendering state.

摘要翻译： 在原始着色中动态调整像素采样率的系统和方法可以提高图像质量或增加遮蔽性能。 通过选择每个像素片段的阴影样本数来执行混合抗混叠。 使用超采样和多采样抗锯齿的组合，其中对于通过片段着色器管线的每次通过处理子像素采样（多采样）的簇。 可以基于呈现状态为每个基元动态地确定每个集群中的着色器遍数和多个样本的数量。

公开(公告)号：US08319783B1

公开(公告)日：2012-11-27

申请号：US12340493

申请日：2008-12-19

申请人： David Kirk McAllister ,  Steven E. Molnar ,  Peter B. Holmqvist ,  Jerome F. Duluk, Jr. ,  Cass W. Everitt ,  Emmett M. Kilgariff ,  Patrick R. Brown ,  Christian Johannes Amsinck

发明人： David Kirk McAllister ,  Steven E. Molnar ,  Peter B. Holmqvist ,  Jerome F. Duluk, Jr. ,  Cass W. Everitt ,  Emmett M. Kilgariff ,  Patrick R. Brown ,  Christian Johannes Amsinck

IPC分类号： G06T1/60 ,  G09G5/39 ,  G09G5/36 ,  G09G5/37

CPC分类号： G09G5/363 ,  G09G5/393 ,  G09G2360/121 ,  G09G2360/122

摘要： A system and method for performing zero-bandwidth-clears reduces external memory accesses by a graphics processor when performing clears and subsequent read operations. A set of clear values is stored in the graphics processor. Each portion of a color or z buffer may be configured using a zero-bandwidth-clear command to reference a clear value without writing the external memory. The clear value is provided to a requestor without accessing the external memory when a read access is performed.

摘要翻译： 执行零带宽清除的系统和方法在执行清除和后续读取操作时减少图形处理器的外部存储器访问。 一组清晰的值存储在图形处理器中。 可以使用零带宽清除命令来配置颜色或z缓冲器的每个部分，以引用清除值而不写入外部存储器。 当执行读取访问时，清除值被提供给请求者而不访问外部存储器。

公开(公告)号：US20120147027A1

公开(公告)日：2012-06-14

申请号：US13399458

申请日：2012-02-17

申请人： Steven E. MOLNAR ,  Cass W. Everitt ,  Roger L. Allen ,  Gary M. Tarolli ,  John M. Danskin

发明人： Steven E. MOLNAR ,  Cass W. Everitt ,  Roger L. Allen ,  Gary M. Tarolli ,  John M. Danskin

IPC分类号： G09G5/00

CPC分类号： G06T15/005 ,  G06F9/522 ,  G06T2210/52

摘要： A method and system for improving data coherency in a parallel rendering system is disclosed. Specifically, one embodiment of the present invention sets forth a method for managing a plurality of independently processed texture streams in a parallel rendering system that includes the steps of maintaining a time stamp for a group of tiles of work that are associated with each of the plurality of the texture streams and are associated with a specified area in screen space, and utilizing the time stamps to counter divergences in the independent processing of the plurality of texture streams.

摘要翻译： 公开了一种用于提高并行渲染系统中数据一致性的方法和系统。 具体地，本发明的一个实施例阐述了一种用于在并行渲染系统中管理多个独立处理的纹理流的方法，该方法包括以下步骤：维护与多个相关联的工作的一组瓦片的时间戳 的纹理流并且与屏幕空间中的指定区域相关联，并且利用时间戳来反复在多个纹理流的独立处理中的分歧。

公开(公告)号：US09208605B1

公开(公告)日：2015-12-08

申请号：US12237605

申请日：2008-09-25

申请人： Cass W. Everitt ,  Rui M. Bastos

发明人： Cass W. Everitt ,  Rui M. Bastos

IPC分类号： G06T15/50 ,  G09G5/00 ,  G06T11/20

CPC分类号： G06T15/503 ,  G06T11/203 ,  G06T15/50

摘要： Multisampling techniques provide temporal as well as spatial antialiasing. Coverage for a primitive is determined at multiple sample locations for a pixel. In one embodiment, coverage is determined using boundary equations representing a boundary surface of the primitive in a three-dimensional space-time. A shading value for the primitive is computed for the pixel and stored for each coverage sample location of the pixel that is covered by the primitive. The sample locations are distributed in both space and time, and multiple sample locations share a single shading computation. The multisampling techniques are extendable to other dimensions that correspond to other image attributes.

摘要翻译： 多采样技术提供时间和空间抗锯齿。 在像素的多个采样位置确定原始图像的覆盖。 在一个实施例中，使用表示三维时空中的原语的边界表面的边界方程来确定覆盖。 为像素计算基元的阴影值，并为由原始图元覆盖的像素的每个覆盖样本位置存储。 样本位置分布在空间和时间上，多个样本位置共享一个阴影计算。 多采样技术可扩展到对应于其他图像属性的其他维度。

公开(公告)号：US07446780B1

公开(公告)日：2008-11-04

申请号：US10912857

申请日：2004-08-04

申请人： Cass W. Everitt ,  Rui M. Bastos

发明人： Cass W. Everitt ,  Rui M. Bastos

IPC分类号： G09G5/00

CPC分类号： G06T15/503 ,  G06T11/203 ,  G06T15/50

摘要： Multisampling techniques provide temporal as well as spatial antialiasing. Coverage for a primitive is be determined at multiple sample locations for a pixel. In one embodiment, coverage is determined using boundary equations representing a boundary surface of the primitive in a three-dimensional space-time. A shading value for the primitive is computed for the pixel and stored for each coverage sample location of the pixel that is covered by the primitive. The sample locations are distributed in both space and time, and multiple sample locations share a single shading computation. The multisampling techniques are extendable to other dimensions that correspond to other image attributes.

摘要翻译： 多采样技术提供时间和空间抗锯齿。 在像素的多个样本位置处确定原语的覆盖。 在一个实施例中，使用表示三维时空中的原语的边界表面的边界方程来确定覆盖。 为像素计算基元的阴影值，并为由原始图元覆盖的像素的每个覆盖样本位置存储。 样本位置分布在空间和时间上，多个样本位置共享一个阴影计算。 多采样技术可扩展到对应于其他图像属性的其他维度。

公开(公告)号：US20080068394A1

公开(公告)日：2008-03-20

申请号：US11522022

申请日：2006-09-15

申请人： Cass W. Everitt

发明人： Cass W. Everitt

IPC分类号： G09G5/00

CPC分类号： G06T15/005 ,  G06T1/60

摘要： A large non-patterned noise texture occupies a relatively small physical memory space. Each of a small set of physical pages in physical memory includes noise texels forming part of a noise texture. A large “virtual” noise texture is created by mapping each one of a large number of pages in virtual address space to one of the small set of physical pages; multiple virtual pages may be mapped to the same physical page. The physical page that each virtual page maps to is randomly or pseudo-randomly selected such that the resulting noise texture appears to be non-repeating. When a noise texel is requested by reference to a virtual address during rendering, the virtual address of the virtual page is translated to the corresponding physical address, and the noise texel is retrieved.

摘要翻译： 大的非图案化噪声纹理占据相对较小的物理存储器空间。 物理存储器中的一小组物理页面中的每一个包括形成噪声纹理的一部分的噪声纹理。 通过将虚拟地址空间中的大量页面中的每一个映射到小的物理页面之一来创建大的“虚拟”噪声纹理; 多个虚拟页面可能被映射到相同的物理页面。 每个虚拟页面映射到的物理页面是随机或伪随机选择的，使得所得到的噪声纹理似乎不重复。 当在渲染期间通过参考虚拟地址请求噪声纹素，虚拟页面的虚拟地址被转换为相应的物理地址，并且检索噪声纹理细分。

公开(公告)号：US09489767B1

公开(公告)日：2016-11-08

申请号：US11956306

申请日：2007-12-13

申请人： Cass W. Everitt ,  Franck R. Diard

发明人： Cass W. Everitt ,  Franck R. Diard

IPC分类号： G06T15/40 ,  G06T15/80

CPC分类号： G06T15/40 ,  G06T15/005 ,  G06T15/405 ,  G06T15/80

摘要： One embodiment of the present invention sets forth a technique to perform fine-grained rendering predication using an IGPU and a DGPU. A graphics driver divides a 3D object into batches of triangles. The IGPU processes each batch of triangles through a modified rendering pipeline to determine if the batch is culled. The IGPU writes bits into a bitstream corresponding to the visibility of the batches. The DGPU reads bits from the bitstream and performs full-blown rendering, including shading, but only on the batches of triangles whose bit indicates that the batch is visible. Advantageously, this approach to rendering predication provides fine-grained culling without adding unnecessary overhead, thereby optimizing both hardware resources and performance.

摘要翻译： 本发明的一个实施例提出了使用IGPU和DGPU执行细粒度渲染预测的技术。 图形驱动程序将3D对象分成三个三角形。 IGPU通过修改的渲染管线处理每批三角形，以确定批次是否被剔除。 IGPU将比特写入与批次的可见性相对应的比特流中。 DGPU从比特流中读取比特流，并执行完整的渲染，包括着色，但仅在批次可以看到的批次的三角形中。 有利地，这种渲染预测的方法提供了细粒度的淘汰，而不会增加不必要的开销，从而优化硬件资源和性能。