Lines Matching refs:gamma
142 and displayed intensities, there is a gamma correction feature in
143 Mesa. Some systems, such as Silicon Graphics, support gamma
144 correction in hardware (man gamma) so you won't need to use Mesa's
145 gamma facility. Other systems, however, may need gamma adjustment
151 Gr is the red gamma value, Gg is the green gamma value, Gb is the
152 blue gamma value and G is one gamma value to use for all three
155 gamma correction. Examples using csh:
158 % setenv MESA_GAMMA "2.0" // same gamma for R,G,B
160 The demos/gamma.c program may help you to determine reasonable gamma
161 value for your display. With correct gamma values, the color intensities
165 Alex De Bruyn reports that gamma values of 1.6, 1.6 and 1.9 work well
168 Mesa implements gamma correction with a lookup table which translates
169 a "linear" pixel value to a gamma-corrected pixel value. There is a
175 For more information about gamma correction see:
252 MESA_GAMMA - gamma correction coefficients (X only)