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Method and apparatus for environment-mapped bump-mapping in a graphics system

  • US 7,205,999 B2
  • Filed: 09/30/2004
  • Issued: 04/17/2007
  • Est. Priority Date: 08/23/2000
  • Status: Expired due to Term
First Claim
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1. In a graphics system including a processing pipeline that renders and displays images at least in part in response to polygon vertex data and texture image data stored in memory, an arrangement for implementing environment-mapped bump mapping in a single rendering pass, comprising:

  • texture memory for storing image data and bump mapping data;

    texture retrieval circuitry for accessing and retrieving data stored in texture memory; and

    texture coordinate/bump processing circuitry coupled to the texture retrieval circuitry and configured to receive data retrieved from texture memory for generating a set of modified texture coordinates, said texture coordinate/bump processing circuitry including multiplication circuitry for performing at least scaling of texture coordinates and a storage buffer for saving a set of modified texture coordinates for reuse by the texture retrieval circuitry in accessing texels of at least an environment map image and/or one or more corresponding texture image data maps stored in texture memory multiple texture image data maps in the texture memory;

    wherein the texture retrieval circuitry is responsive to a set of indirect texture coordinates to provide said texture coordinate/bump processing circuitry with data retrieved from the texture memory for use in generating said set of modified texture coordinates.

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