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Graphics system interface

  • US 6,697,074 B2
  • Filed: 07/30/2002
  • Issued: 02/24/2004
  • Est. Priority Date: 11/28/2000
  • Status: Active Grant
First Claim
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1. A graphics system command stream for use in a graphics system having an internal frame buffer and plurality of pixel engine registers within a graphics pipeline, the graphics system command stream being operable upon execution to set said internal frame buffer, said graphics system command stream comprising:

  • a stream command 0x614F providing access to said registers and defining a pixel engine copy clear alpha/red command that designates a first register of said plurality of pixel engine registers which contains an alpha value and a red value, herein said first register includes a 1-byte pad, a 1-byte alpha value and a 1-byte red value;

    a stream command 0x6150 providing access to said registers and defining a pixel engine copy clear greenlblue command that designates a second regis er of said plurality of pixel engine registers which contains a green value and a blue value, wherein said second register includes a 1-byte pad, a 1-byte green value and a 1-byte blue value; and

    a stream command 0x6151 providing access to said registers and defining a pixel engine copy clear z command that designates a third register of said plurality of pixel engine registers which contains a 24-bit z value, wherein upon execution of the graphics command stream the embedded frame buffer is set with said alpha value, said red value, said green value, said blue and said z value.

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