THOMAS A LIANZA via colorsync-users wrote:
A wide gamut panel will necessarily have an input lookup table, a matrix or 3D out, followed by a display look up table. In general, use of the graphic card LUT is not recommended at all inmost modern calibration environments.
Nice in theory, useless in reality, because there are no standards. There is no standard, reliable API for discovering and manipulating a displays internal capabilities - the display makers all play the proprietary game, and the OS makers don't have good, reliable API's for accessing these capabilities. In contrast, there are standard, reliable API's for accessing video card per channel lookup tables. Given that the ICC profile format has been sabotaged in regard to display profile absolute colorimetric intent, the video card calibration curves are the only standard mechanism available for software to set white point and brightness. If this is ever to be improved, an effort at standardization amongst display makers and OS vendors is needed, that will overcome the tendency of vendors to be secretive and play proprietary games. Graeme Gill.