Method for colorflash reduction by copying color values between active and inactive window applications so as to minimize differing color cells between corresponding color maps
US5703627A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1996 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Jun 27, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for reducing colorflashing by performing residual color allocation and default colormap sharing in a computer system that employs a default colormap to display color. The residual color allocation technique copies color values from a private colormap into corresponding non-allocated (free) cells within the computer system default colormap. While copying into the free cells in the default colormap the free cells are temporarily set to have an allocated status. After copying, the copied cells are reset to a free status. In this way, other clients may allocate the default map's free cells to perform residual colormap allocation. Since the default colormap's copied cells are the same as corresponding cells in the private map they do not flash when switching color focus between the default colormap and the private colormap. The default colormap sharing technique is employed in the case in which a private colormap does not require a specific set of colors, and can adapt to a given set of colors. Default colormap sharing is performed by copying allocated cell color values from the default colormap to corresponding cell locations within the private colormap. The residual color all…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.