It seems that cairo not only doesn't support 8bit pseudocolor but also Truecolor, remember there is still a case that the 8bit color represent as truecolor with 2bit blue, 3bit Green and 3bit Red, this kind of color system still been used in some case.
It seems that cairo not only doesn't support 8bit pseudocolor but also Truecolor, remember there is still a case that the 8bit color represent as truecolor with 2bit blue, 3bit Green and 3bit Red, this kind of color system still been used in some case.