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| <TITLE>Environment Variables</TITLE> |
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| <H1>Environment Variables</H1> |
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| <p> |
| Mesa supports the following environment variables: |
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| <ul> |
| <li>MESA_NO_ASM - if set, disables all assembly language optimizations |
| <li>MESA_NO_MMX - if set, disables Intel MMX optimizations |
| <li>MESA_NO_3DNOW - if set, disables AMD 3DNow! optimizations |
| <li>MESA_NO_SSE - if set, disables Intel SSE optimizations |
| <li>MESA_DEBUG - if set, error messages are printed to stderr. |
| If the value of MESA_DEBUG is "FP" floating point arithmetic errors will |
| generate exceptions. |
| <li>MESA_NO_DITHER - if set, disables dithering, overriding glEnable(GL_DITHER) |
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| <p> |
| The following environment variables are only applicable to the Xlib/X11 |
| software driver: |
| </p> |
| <ul> |
| <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_GAMMA - gamma correction coefficients (X only) |
| <li>MESA_XSYNC - enable synchronous X behavior (for X debugging only) |
| <li>MESA_GLX_FORCE_CI - if set, force GLX to treak 8bpp visuals as CI visuals |
| <li>MESA_GLX_FX - set to either "fullscreen" for full-screen rendering, |
| "window" to render into a window, or "disable" to disable the Glide driver. |
| <li>MESA_GLX_FORCE_ALPHA - if set, forces RGB windows to have an alpha channel. |
| <li>MESA_GLX_DEPTH_BITS - specifies default number of bits for depth buffer. |
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