Method of creating transparent graphics

Details Method of creating transparent graphics Method of creating transparent graphics

1998-05-27

2000-11-21

Powell, Mark R.

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

345431, 345344, 345139, 345136, G06F 1730

Patent

active

061510300

ABSTRACT:
A method of creating transparent graphics for display in a computer system. A first frame buffer is provided to store display components to be displayed transparently on a computer monitor, the display components having a plurality of pixels. A second frame buffer is provided as a new output frame buffer. Pixels of the first frame buffer are color mixed with pixels of the computer system's original output frame buffer to produce color mixed pixels. The pixels of the output frame buffer are interleaved with the color mixed pixels, the interleaved pixels are stored in the second frame buffer, and the pixels of the second frame buffer are displayed. The color mixing is accomplished by a weighted average of the color components of the pixels of the first frame buffer and the output frame buffer. The interleaving is adjustable such that every second pixel, or every fourth pixel, or every eighth pixel, and so on, of the color mixed pixels is selected for inclusion in the second frame buffer, thereby changing the level of transparency of the displayed data.

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Harrison et al, "Transparent Layered User Interfaces: An Evaluation of a Display Design to Enhance Focused and Divided Attention," CHI '95 Proceedings Papers, pp. 1-10, printed Apr. 20, 1998.
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