Apple Inc.

Ati Technologies Ulc

Ati Technologies Inc.

John R Isidoro

Jeremy Sandmel

Anthony P DeLaurier

Andrew M Sowerby

Deron D Johnson

Filip Iliescu

Benjamin N Lipchak

Michael T Mayers

Chris Brennan

Tien E Wei

Anthony Delaurier

Analyzing an application executing on a target device. An application may be executed on a target device. Low cost measurement may be gathered regarding the application executing on the target device. In response to a trigger, high cost measurement data may be gathered regarding the application executing on the target device. The high cost measurement data may include graphics commands provided by the application. The graphics commands and related information may be stored and provided to a host. The host may modify the graphics commands to perform experiments to determine performance issues of the application executing on the target device. The host may determine whether the performance is limited by the CPU or the GPU and may determine specific operations that are causing performance issues. The host may provide suggestions for overcoming the performance issues.

Graphics system which utilizes fine grained analysis to determine performance issues

Min-axis based mip map determination logic receives a plurality of texture space derivatives with respect to screen space for a given pixel and texel location and selects from a plurality of mip map levels a mip map level based on a min-axis without using a max-axis value and without using an amount of anisotropy. The plurality of mip map levels corresponds to mip map levels of a mip chain. The min-axis may be identified as the squares of the texture space derivatives with respect to either the x-axis or the y-axis of screen space. Selecting the mip map level based on the min-axis ensures that each texel of the selected mip map never maps to more than one pixel during texture mapping where the main texture is of sufficient resolution. Thus, using the mip map level based on the min-axis to fetch texture data from memory and render images results in few aliasing artifacts.

Method and apparatus for selecting a mip map level based on a min-axis value for texture mapping

Disclosed are methods and apparatus for accomplishing the fetching or sampling of channels of pixels or texels such as neighboring pixels or texels or non-neighboring pixels or texels in a simultaneous operation in order to achieve optimization of the performance of a texture pipeline. In particular, logic is disclosed including selector logic configured to retrieve data including a plurality of channels from each of a plurality of pixels or texels and operable to select one channel from the plurality of channels of the data from each of the pixels or texels. The logic also includes combination logic configured to combine two or more of the selected channels into a single vector, such as an RGBA vector representing the color.

Methods and apparatus for retrieving and combining samples of graphics information

Growing community of inventors

Framingham, MA, United States of America

John R Isidoro