Gerhard Fuernkranz wrote:
[granted that the graphics card supports shaders at all], but if hardware video playback capabilities of the graphics card are utilized, then my understanding is that shaders cannot be used, but only unspecific adjustments like e.g. "brightness", "contrast", "saturation", "hue" are possible [and nobody knows what these adjustments are really doing, in colorimetric terms, and how they interact].
I would suspect that some of them have 3x3 matrix transform support, since often they are having to do a color conversion from YCC or something similar, so in theory they could transform to the specific display chromaticities and white point rather than a generic sRGB etc., if there was an interface for specifying such things. Graeme Gill.