Bill Spitzak wrote:
These gamma ramps are an attempt to simulate a color conversion from some color space (sRGB?) to the color space of the output device.
No, they are not. Gamma ramp setting generally accomplishes one or more of: 1) Setting the brightness to a calibrated level. 2) Setting the white point to a target color temperature. 3) Setting the gray response to a particular curve and neutrality. Although you might be able to accomplish 2) using ICC profiles, it isn't supported very well (absolute colorimetric & V4 ICC profiles etc.), and it's better for the users state of adaptation if the whole screen has a common white point. 3) helps non-color managed application, as well as making the display more easily and accurately color profile-able.
So > does this mean that the default color space of the buffers a client renders is sRGB?
You can't do that with 1D ramps - you need at least a matrix as well. For general colorspace emulation you need a 3D cLUT. Graeme Gill. _______________________________________________ wayland-devel mailing list wayland-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/wayland-devel
