AFAICT intel hardware wants a 129-entry LUT when using high precision gamma ramps. Rather than hacking some kind of decimation into the kernel driver (and thus silently breaking DirectColor), I'd like to teach userspace how to deal with variable gamma sizes.
gnome-color-manager already more-or-less supports arbitrary gamma ramp sizes (supposedly), dispwin ought to do it, and there might not be any other software that really cares. gnome-screensaver saves and restores the gamma ramp, and I haven't checked if it works right for funny sizes. The worst problem we'll have is that current xf86-drv-intel can't handle non-256 gamma sizes at all. So if we change the kernel we'll break it completely. One option is to have the kernel report gamma_size = 129 but still accept 256 and decimate itself. That might cause current userspace to keep working (except for DirectColor). Any thoughts? _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
