<HTML> <TITLE>Environment Variables</TITLE> <BODY text="#000000" bgcolor="#55bbff" link="#111188"> <H1>Environment Variables</H1> <p> Mesa supports the following environment variables: </p> <ul> <li>MESA_DEBUG - if defined, error messages are printed to stderr <li>MESA_NO_DITHER - disable dithering, overriding glEnable(GL_DITHER) <li>MESA_RGB_VISUAL - specifies the X visual and depth for RGB mode (X only) <li>MESA_CI_VISUAL - specifies the X visual and depth for CI mode (X only) <li>MESA_BACK_BUFFER - specifies how to implement the back color buffer (X only) <li>MESA_PRIVATE_CMAP - force aux/tk libraries to use private colormaps (X only) <li>MESA_GAMMA - gamma correction coefficients (X only) <li>MESA_XSYNC - enable synchronous X behavior (for X debugging only) </ul> </BODY> </HTML>