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Immediate mode drawing interface for the construction of graphics software

  • US 5,982,399 A
  • Filed: 03/26/1997
  • Issued: 11/09/1999
  • Est. Priority Date: 06/21/1996
  • Status: Expired due to Term
First Claim
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1. A system for generating graphic images using a renderer program, comprising:

  • a computer having a graphics peripheral device and an input peripheral device attached thereto;

    a first version of the renderer program, executed by the computer, for receiving a command stream in a first format, for selectively responding to commands within the command stream, for selectively modifying the command stream, and for transmitting the command stream directly to the graphics peripheral device or directly to another renderer program;

    a second version of the renderer program, executed by the computer, for receiving a command stream in a second format, for selectively responding to commands within the command stream, for selectively modifying the command stream, and for transmitting the command stream directly to the graphics peripheral device or directly to another renderer program;

    an application program, executed by the computer, for receiving commands from the input device and for generating an application output command stream in response thereto, wherein the application output command stream is in the first format so that it is compatible with the first version of the renderer program, and comprises one or more instructions for generating the graphic images;

    a version renderer program, executed by the computer and coupled between the application program and the second version of the renderer program, for receiving the application output command stream from the application program, for selectively transforming the application output command stream into a command stream in the second format so that it is compatible with the second version of the renderer program, and for transmitting the selectively transformed application output command stream to the second version of the renderer program.

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