diff options
author | Brian Paul <brianp@vmware.com> | 2011-02-17 07:29:20 -0700 |
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committer | Brian Paul <brianp@vmware.com> | 2011-02-17 07:29:20 -0700 |
commit | 1bf9954bb44e47670c8805078f78b5444e97c18d (patch) | |
tree | 3884940bd51b7317802a1100100578e34c024ba4 | |
parent | f9df46f873ba3db15baaf77da9ee4dd98cb5f762 (diff) |
docs: updated environment variable list
-rw-r--r-- | docs/envvars.html | 103 |
1 files changed, 90 insertions, 13 deletions
diff --git a/docs/envvars.html b/docs/envvars.html index fd1700a02f..c8be843717 100644 --- a/docs/envvars.html +++ b/docs/envvars.html @@ -9,17 +9,38 @@ <H1>Environment Variables</H1> <p> -Mesa supports the following environment variables: +Normally, no environment variables need to be set. Most of the environment +variables used by Mesa/Gallium are for debugging purposes, but they can +sometimes be useful for debugging end-user issues. </p> + + +<H2>LibGL environment variables</H2> + +<ul> +<li>LIBGL_DEBUG - If defined debug information will be printed to stderr. + If set to 'verbose' additional information will be printed. +<li>LIBGL_DRIVERS_PATH - colon-separated list of paths to search for DRI drivers +<li>LIBGL_ALWAYS_INDIRECT - forces an indirect rendering context/connection. +<li>LIBGL_ALWAYS_SOFTWARE - if set, always use software rendering +<li>LIBGL_NO_DRAWARRAYS - if set do not use DrawArrays GLX protocol (for debugging) +</ul> + + + +<H2>Core Mesa environment variables</H2> + <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) +<li>MESA_DEBUG - if set, error messages are printed to stderr. For example, + if the application generates a GL_INVALID_ENUM error, a corresponding error + message indicating where the error occured, and possibly why, will be + printed to stderr.<br> + If the value of MESA_DEBUG is 'FP' floating point arithmetic errors will + generate exceptions. <li>MESA_TEX_PROG - if set, implement conventional texture env modes with fragment programs (intended for developers only) <li>MESA_TNL_PROG - if set, implement conventional vertex transformation @@ -28,11 +49,14 @@ Setting this variable automatically sets the MESA_TEX_PROG variable as well. <li>MESA_EXTENSION_OVERRIDE - can be used to enable/disable extensions. A value such as "GL_EXT_foo -GL_EXT_bar" will enable the GL_EXT_foo extension and disable the GL_EXT_bar extension. -<li>MESA_GLSL - <a href="shading.html#envvars">shading language options</a> +<li>MESA_GLSL - <a href="shading.html#envvars">shading language compiler options</a> </ul> + +<H2>Mesa Xlib driver environment variables</H2> + <p> -The following are only applicable to the Xlib software driver. +The following are only applicable to the Mesa Xlib software driver. See the <A HREF="xlibdriver.html">Xlib software driver page</A> for details. </p> <ul> @@ -51,9 +75,8 @@ See the <A HREF="xlibdriver.html">Xlib software driver page</A> for details. </ul> -<p> -These environment variables are for the Intel i945/i965 drivers: -</p> +<h2>i945/i965 driver environment variables (non-Gallium)</h2> + <ul> <li>INTEL_STRICT_CONFORMANCE - if set to 1, enable sw fallbacks to improve OpenGL conformance. If set to 2, always use software rendering. @@ -62,17 +85,71 @@ These environment variables are for the Intel i945/i965 drivers: </ul> -<p> -These environment variables are for the Radeon R300 driver: -</p> +<h2>Radeon R300 driver environment variables (non-Gallium)</h2> + <ul> <li>R300_NO_TCL - if set, disable hardware-accelerated Transform/Clip/Lighting. </ul> + +<h2>EGL environment variables</h2> + <p> Mesa EGL supports different sets of environment variables. See the <a href="egl.html">Mesa EGL</a> page for the details. </p> + +<h2>Gallium environment variables</h2> + +<ul> +<li>GALLIUM_PRINT_OPTIONS - if non-zero, print all the Gallium environment + variables which are used, and their current values. +<li>GALLIUM_NOSSE - if non-zero, do not use SSE runtime code generation for + shader execution +<li>GALLIUM_NOPPC - if non-zero, do not use PPC runtime code generation for + shader execution +<li>GALLIUM_DUMP_CPU - if non-zero, print information about the CPU on start-up +<li>TGSI_PRINT_SANITY - if set, do extra sanity checking on TGSI shaders and + print any errors to stderr. +<LI>DRAW_FSE - ??? +<LI>DRAW_NO_FSE - ??? +<li>DRAW_USE_LLVM - if set to zero, the draw module will not use LLVM to execute + shaders, vertex fetch, etc. +</ul> + +<h3>Softpipe driver environment variables</h3> +<ul> +<li>SOFTPIPE_DUMP_FS - if set, the softpipe driver will print fragment shaders + to stderr +<li>SOFTPIPE_DUMP_GS - if set, the softpipe driver will print geometry shaders + to stderr +<li>SOFTPIPE_NO_RAST - if set, rasterization is no-op'd. For profiling purposes. +</ul> + + +<h3>LLVMpipe driver environment variables</h3> +<ul> +<li>LP_NO_RAST - if set LLVMpipe will no-op rasterization +<li>LP_DEBUG - a comma-separated list of debug options is acceptec. See the + source code for details. +<li>LP_PERF - a comma-separated list of options to selectively no-op various + parts of the driver. See the source code for details. +<li>LP_NUM_THREADS - an integer indicating how many threads to use for rendering. + Zero turns of threading completely. The default value is the number of CPU + cores present. +</ul> + + +<p> +Other Gallium drivers have their own environment variables. These may change +frequently so the source code should be consulted for details. +</p> + + +<br> +<br> + + </BODY> </HTML> |