Stefan Döhla wrote: > Hi Frederic, Graeme, > >>> Not being the author of xcalib, not without some effort. Can you clarify >>> a little how xcalib and dispwin behave on these two profiles (ie. >>> description of four cases). >>> > > I am, however I'm not the author of dispwin ;-) > > When I started xcalib, I crosschecked with some other calibration > loaders to find out why gamma 1.0 in the vcgt tag makes the screen > darker when using these other loaders - 1.0 was supposed to mean > linear ... > > Therefore I took the system gamma into account, which is 2.2 on Win32 > and 2.222 on Unixes Hi Stefan, why 2.222 on Unix? According to which standard/specification? Regards, Gerhard > - voila: results were the same! > > The ramp is then created from the gamma values rGamma, rMax and rMin like > this: > > for(j=0; j<nEntries;j++) > { > ramp[j] = 65536.0 * > pow (j * (rMax - rMin) / nEntries, rGamma * SYSTEM_GAMMA) > + rMin); > } > > I think xcalib's behaviour is correct - at least if the > result is compared to other calibration loaders like the WindowsXP > color panel, ... > > Happy new year everyone > Stefan > > -- > mailto:color@xxxxxxxxx >