Thank you Simon and Mikhail. I understood.
> -----Original Message----- > From: Simon Thum [mailto:[email protected]] > Sent: Wednesday, March 17, 2010 12:07 AM > To: Zhang, Xing Z > Cc: [email protected] > Subject: Re: what is "primary" refer to in visual > > Am 16.03.2010 09:42, schrieb Zhang, Xing Z: > > Hi experts: > > From xlib manual, here are sentences for color: > > > > GrayScale is treated the same way as PseudoColor except that the *primary* > that drives the > > screen is undefined. Thus, the client should always store the same value for > red, green, and > > blue in the colormaps. > > > > TrueColor is treated the same way as DirectColor except that the colormap > has predefined, > > read-only RGB values. These RGB values are server dependent but provide > linear or > > near-linear ramps in each *primary*. > > > > I apologize for my bad English, I am confused by the word "primary". > I wonder what does > > "primary" mean here? Thank you. > > You may find this link helpful: > http://en.wikipedia.org/wiki/Primary_colour > > Cheers, > > Simon _______________________________________________ [email protected]: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg
