- MESA_RGB_VISUAL - specifies the X visual and depth for RGB mode (X only)
- MESA_CI_VISUAL - specifies the X visual and depth for CI mode (X only)
- MESA_BACK_BUFFER - specifies how to implement the back color buffer (X only)
- MESA_PRIVATE_CMAP - force aux/tk libraries to use private colormaps (X only)
- MESA_GAMMA - gamma correction coefficients (X only)
+MESA_RGB_VISUAL - specifies the X visual and depth for RGB mode (X only)
+MESA_CI_VISUAL - specifies the X visual and depth for CI mode (X only)
+MESA_BACK_BUFFER - specifies how to implement the back color buffer (X only)
+MESA_PRIVATE_CMAP - force aux/tk libraries to use private colormaps (X only)
+MESA_GAMMA - gamma correction coefficients (X only)