2009-11-11 16:15:31 UTC
Thanks for the quick reply. I'm glad that issues (1) and (3) are getting resolved.
About (2): I understand the concern about breaking compatibility code when making such changes. I dug back into a couple old releases of IM and found that that they did indeed previously define sRGBColorspace as it is currently defined in GM. I didn't figure out when exactly the change happened, but IM 6.0.0 (circa 2004) used the same definition that GM uses now.
The sRGBColorspace that IM currently has performs the gamma adjustment that occurs on a sRGB monitor (which is approximately, but not exactly, 2.2). Therefore, sRGBColorspace in IM can be used to convert the RGB input values into values which correspond to physical brightness of the pixels on an sRGB-calibrated monitor (and vice versa). In short, the sRGBColorspace in IM is useful in some circumstances. The sRGB gamma adjustment, however, is pretty straightforward and a programmer could implement it themselves easily without having to rely on IM or GM.
