Lines Matching refs:gamma
84 displayed intensities, there is a gamma correction feature in Mesa. Some
85 systems, such as Silicon Graphics, support gamma correction in hardware
86 (man gamma) so you won't need to use Mesa's gamma facility. Other
87 systems, however, may need gamma adjustment to produce images which look
92 is the red gamma value, Gg is the green gamma value, Gb is the blue
93 gamma value and G is one gamma value to use for all three channels. Each
95 defaults are all 1.0, effectively disabling gamma correction. Examples:
100 % export MESA_GAMMA="2.0" # same gamma for R,G,B
102 The ``demos/gamma.c`` program in mesa/demos repository may help you to
103 determine reasonable gamma value for your display. With correct gamma
107 Alex De Bruyn reports that gamma values of 1.6, 1.6 and 1.9 work well on
110 Mesa implements gamma correction with a lookup table which translates a
111 "linear" pixel value to a gamma-corrected pixel value. There is a small
117 For more information about gamma correction, see the `Wikipedia
212 | :envvar:`MESA_GAMMA` | gamma correction coefficients |