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1. 发明授权

US09865035B2 Image scaling techniques 有权
公开(公告)号：US09865035B2
公开(公告)日：2018-01-09
申请号：US14843974
申请日：2015-09-02
申请人： Walter E. Donovan
发明人： Walter E. Donovan
IPC分类号： G06K9/00 , G06T3/40
CPC分类号： G06T3/4007
摘要： Image scaling techniques, in accordance with embodiments of the present technology, include directionally interpolating blocks of pixel data of an image, sharpening the directional interpolated blocks of pixel data, and optionally clamping the sharpened, directional interpolated blocks of pixel data.

2. 发明授权

US09081681B1 Method and system for implementing compressed normal maps 有权
标题翻译：实现压缩法线贴图的方法和系统
公开(公告)号：US09081681B1
公开(公告)日：2015-07-14
申请号：US10742434
申请日：2003-12-19
申请人： Walter E. Donovan
发明人： Walter E. Donovan
IPC分类号： G09G5/00 , G06T11/40 , G06T9/00 , G06F12/08
CPC分类号： G06F12/08 , G06T9/00 , G06T15/005 , G06T15/04
摘要： A method for compressing normal maps in a computer system. The method includes accessing a map of input normals. A memory block having a first portion and a second portion is defined. A table of indices is stored in the first portion of the memory block and a table of normals is stored in the second portion of the memory block. The indices of the first portion of the memory block reference the normals of the second portion. The normals in the second portion of the memory block are unit normals of a sphere defined to represent the map of input normals.
摘要翻译：一种用于压缩计算机系统中的法线贴图的方法。该方法包括访问输入法线的地图。定义了具有第一部分和第二部分的记忆块。索引表存储在存储器块的第一部分中，并且法线表存储在存储器块的第二部分中。存储器块的第一部分的索引引用第二部分的法线。存储器块的第二部分中的法线是被定义为表示输入法线的映射的球体的单位法线。

3. 发明申请

US20110090251A1 ALPHA-TO-COVERAGE VALUE DETERMINATION USING VIRTUAL SAMPLES 有权
标题翻译：使用虚拟样品的ALPHA到覆盖值确定
公开(公告)号：US20110090251A1
公开(公告)日：2011-04-21
申请号：US12904935
申请日：2010-10-14
申请人： Walter E. Donovan , Emmett M. Kilgariff , Steven E. Molnar , Christian Amsinck , Robert Ohannessian
发明人： Walter E. Donovan , Emmett M. Kilgariff , Steven E. Molnar , Christian Amsinck , Robert Ohannessian
IPC分类号： G09G5/00
CPC分类号： G06T15/503 , G06T15/005 , G09G5/363 , G09G5/393 , G09G2360/123
摘要： One embodiment of the present invention sets forth a technique for converting alpha values into pixel coverage masks. Geometric coverage is sampled at a number of “real” sample positions within each pixel. Color and depth values are computed for each of these real samples. Fragment alpha values are used to determine an alpha coverage mask for the real samples and additional “virtual” samples, in which the number of bits set in the mask bits is proportional to the alpha value. An alpha-to-coverage mode uses the virtual samples to increase the number of transparency levels for each pixel compared with using only real samples. The alpha-to-coverage mode may be used in conjunction with virtual coverage anti-aliasing to provide higher-quality transparency for rendering anti-aliased images.
摘要翻译：本发明的一个实施例提出了一种将α值转换为像素覆盖掩码的技术。在每个像素内的多个“实”样本位置采样几何覆盖。为这些实际样本中的每一个计算颜色和深度值。片段α值用于确定实际样本和附加“虚拟”样本的alpha覆盖掩码，其中掩码位中设置的位数与alpha值成比例。与仅使用真实样本相比，alpha到覆盖模式使用虚拟样本来增加每个像素的透明度级别数。 alpha到覆盖模式可以与虚拟覆盖抗锯齿一起使用，以提供用于渲染抗锯齿图像的更高质量的透明度。

4. 发明授权

US07852346B1 Programmable graphics processor for generalized texturing 有权
标题翻译：可编程图形处理器，用于广义纹理
公开(公告)号：US07852346B1
公开(公告)日：2010-12-14
申请号：US11284589
申请日：2005-11-22
申请人： Walter E. Donovan , John Erik Lindholm
发明人： Walter E. Donovan , John Erik Lindholm
IPC分类号： G09G5/00 , G06T15/00
CPC分类号： G06T15/005 , G06T15/04
摘要： A programmable graphics processor including an execution pipeline and a texture unit is described. The execution pipeline processes graphics data as specified by a fragment program. The fragment program may include one or more opcodes. The texture unit includes one or more sub-units which execute the opcodes to perform specific operations such as an LOD computation, generation of sample locations used to read texture map data, and address computation based on the sample locations.
摘要翻译：描述了包括执行流水线和纹理单元的可编程图形处理器。执行流水线处理由片段程序指定的图形数据。片段程序可以包括一个或多个操作码。纹理单元包括一个或多个子单元，其执行操作码以执行诸如LOD计算的特定操作，用于读取纹理映射数据的样本位置的生成以及基于样本位置的地址计算。

5. 发明授权

US07626587B1 Method and apparatus for displaying image data of a virtual desktop from one or more frame buffers onto a display screen 有权
标题翻译：用于将虚拟桌面的图像数据从一个或多个帧缓冲器显示到显示屏上的方法和装置
公开(公告)号：US07626587B1
公开(公告)日：2009-12-01
申请号：US11030223
申请日：2005-01-06
申请人： Abraham B. de Waal , Walter E. Donovan
发明人： Abraham B. de Waal , Walter E. Donovan
IPC分类号： G06F13/00
CPC分类号： G09G5/397 , G06F3/1431 , G06F3/1438 , G09G5/14 , G09G5/363 , G09G5/391 , G09G2340/0407 , G09G2340/045 , G09G2340/12
摘要： A computer system including a processor, a display, and a graphics unit coupled between the processor and the display, in which the processor is configured to perform multi-display operations which generate multiple frames of display data for simultaneous display, and a graphics unit for use in such a system. Typically, the graphics unit includes graphics memory that includes at least two frame buffers, and the processor operates as if it were independently asserting multiple streams of display data to multiple frame buffers for driving multiple displays independently. Another aspect of the invention is a system that displays data from a frame buffer on a screen. The frame buffer holds data indicative of a virtual desktop that is larger than can be displayed on the screen or available portion thereof, the system can display on the screen any of a number of different subsets of the frame buffer data, each subset indicative of a different portal of the desktop, and the system includes a processor including texture processing circuitry operable to filter a subset of the frame buffer data that is indicative of a portal to be displayed.
摘要翻译：一种计算机系统，包括耦合在处理器和显示器之间的处理器，显示器和图形单元，其中处理器被配置为执行产生用于同时显示的多个显示数据帧的多显示操作，以及用于在这样的系统中使用。通常，图形单元包括包括至少两个帧缓冲器的图形存储器，并且处理器操作，就好像它独立地将多个显示数据流断言为多个帧缓冲器，以独立地驱动多个显示器。本发明的另一方面是在屏幕上显示来自帧缓冲器的数据的系统。帧缓冲器保存指示大于可以显示在屏幕上或其可用部分上的虚拟桌面的数据，系统可以在屏幕上显示帧缓冲器数据的多个不同子集中的每一个子集，每个子集指示一个桌面的不同门户，并且该系统包括处理器，其包括纹理处理电路，其可操作以过滤指示要显示的门户的帧缓冲器数据的子集。

6. 发明授权

US07593018B1 Method and apparatus for providing explicit weights for texture filtering 有权
标题翻译：用于提供纹理过滤的显式权重的方法和装置
公开(公告)号：US07593018B1
公开(公告)日：2009-09-22
申请号：US11300811
申请日：2005-12-14
申请人： Michael J. M. Toksvig , Walter E. Donovan
发明人： Michael J. M. Toksvig , Walter E. Donovan
IPC分类号： G09G5/00 , G06K9/00
CPC分类号： G06T3/4007 , G06T15/04
摘要： A system and method for providing explicit weights for texture filtering permits filter weights to vary for each pixel within a primitive. A different filter kernel may be used for each pixel. The weights may be computed or read from a texture map. Because the weights are explicit, the fractional portions of the texture map coordinates that are typically used to determine a bilinearly filtered texel are not used.
摘要翻译：用于提供纹理过滤的显式权重的系统和方法允许滤波器权重对于原语内的每个像素而变化。可以为每个像素使用不同的滤波器内核。权重可以从纹理图计算或读取。因为权重是明确的，所以不使用通常用于确定双线性纹理纹理纹理的纹理贴图坐标的小数部分。

7. 发明授权

US07355603B2 Filtering unit for floating-point texture data 有权
标题翻译：用于浮点纹理数据的过滤单元
公开(公告)号：US07355603B2
公开(公告)日：2008-04-08
申请号：US10912419
申请日：2004-08-04
申请人： Walter E. Donovan , Anders M. Kugler , Christopher D. S. Donham
发明人： Walter E. Donovan , Anders M. Kugler , Christopher D. S. Donham
IPC分类号： G09G5/00
CPC分类号： G06T15/04 , G06T2200/28
摘要： Floating-point texture filtering units leverage existing fixed-point filter circuits. Groups of floating-point texture values are converted to products of a fixed-point mantissa and a scaling factor that is the same for each texture value in the group. The fixed-point mantissas are filtered using a fixed-point filter circuit, and the filtered mantissa is combined with the scaling factor to determine a floating-point filtered value. Multiple floating-point filter results may be combined in a floating-point accumulator circuit. The same fixed-point filter circuit may also be used to filter fixed-point texture data by providing fixed-point input path that bypasses the format conversion and a fixed-point accumulator.
摘要翻译：浮点纹理过滤单元利用现有的定点滤波电路。浮点纹理值组被转换为固定点尾数的乘积和对组中每个纹理值相同的缩放因子。使用定点滤波器电路对定点尾数进行滤波，并将滤波尾数与缩放因子组合以确定浮点滤波值。多个浮点滤波器结果可以组合在浮点累加器电路中。也可以使用相同的定点滤波器电路来通过提供绕过格式转换的定点输入路径和定点累加器来对定点纹理数据进行滤波。

8. 发明授权

US07167183B1 Reorganized anisotropic sampling order 有权
标题翻译：重组各向异性取样顺序
公开(公告)号：US07167183B1
公开(公告)日：2007-01-23
申请号：US10965069
申请日：2004-10-14
申请人： Walter E. Donovan , Anders M. Kugler , William P. Newhall, Jr. , Paul S. Heckbert
发明人： Walter E. Donovan , Anders M. Kugler , William P. Newhall, Jr. , Paul S. Heckbert
IPC分类号： G09G5/00
CPC分类号： G06T1/60 , G06T15/005
摘要： The current invention involves new systems and methods for reorganizing a texture sampling order that is used to read texels from a texel cache. When anisotropic filtering is used to process the texels read from the texel cache, the texels are read in an order based on a major axis alignment. Reorganizing texture sampling order to use the order based on the major axis alignment results in improved texel cache locality, thereby improving texel cache performance.
摘要翻译：本发明涉及用于重新组织纹理采样顺序的新系统和方法，其用于从纹素文件高速缓存读取纹理。当使用各向异性过滤处理从纹素文件高速缓存读取的纹素时，纹素以基于长轴对齐的顺序读取。重新组织纹理采样顺序以使用基于长轴对准的顺序，从而改善了纹理像素高速缓存的局部性，从而改善了纹理高速缓存的性能。

9. 发明授权

US06690372B2 System, method and article of manufacture for shadow mapping 有权
标题翻译：阴影映射的系统，方法和制造
公开(公告)号：US06690372B2
公开(公告)日：2004-02-10
申请号：US09730639
申请日：2000-12-05
申请人： Walter E. Donovan , Liang Peng
发明人： Walter E. Donovan , Liang Peng
IPC分类号： G06T1500
CPC分类号： G06T15/60 , G06T15/50 , G06T15/80
摘要： A system, method and article of manufacture are provided for shadow mapping while rendering a primitive in a graphics pipeline. Initially, an offset operation is performed in order to generate a depth value while rendering a primitive. Further, a value of a slope associated with an edge of the primitive is identified. Thereafter, the depth value is conditionally clamped based on the value of the slope.
摘要翻译：在图形管线中呈现原始图像时，提供了一种用于阴影映射的系统，方法和制品。最初，执行偏移操作以在生成原始图像时产生深度值。此外，识别与图元的边缘相关联的斜率的值。此后，基于斜率的值来有条件地夹紧深度值。

10. 发明授权

US06593923B1 System, method and article of manufacture for shadow mapping 有权
公开(公告)号：US06593923B1
公开(公告)日：2003-07-15
申请号：US09640505
申请日：2000-08-16
申请人： Walter E. Donovan , Liang Peng
发明人： Walter E. Donovan , Liang Peng
IPC分类号： G06T1500
CPC分类号： G06T15/50 , G06T15/60 , G06T15/80
摘要： A system, method and article of manufacture are provided for shadow mapping while rendering a primitive in a graphics pipeline. Initially, an offset operation is performed in order to generate a depth value while rendering a primitive. Further, a value of a slope associated with an edge of the primitive is identified. Thereafter, the depth value is conditionally clamped based on the value of the slope.

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