<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)
+<li>LIBGL_ALWAYS_INDIRECT - if set to `true`, forces an indirect rendering context/connection.
+<li>LIBGL_ALWAYS_SOFTWARE - if set to `true`, always use software rendering
+<li>LIBGL_NO_DRAWARRAYS - if set to `true`, do not use DrawArrays GLX protocol (for debugging)
<li>LIBGL_SHOW_FPS - print framerate to stdout based on the number of glXSwapBuffers
calls per second.
-<li>LIBGL_DRI3_DISABLE - disable DRI3 if set (the value does not matter)
+<li>LIBGL_DRI3_DISABLE - disable DRI3 if set to `true`.
</ul>
<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_NO_ERROR - if set error checking is disabled as per KHR_no_error.
+<li>MESA_NO_ERROR - if set to 1, error checking is disabled as per KHR_no_error.
This will result in undefined behaviour for invalid use of the api, but
can reduce CPU use for apps that are known to be error free.</li>
<li>MESA_DEBUG - if set, error messages are printed to stderr. For example,
glGetString(GL_SHADING_LANGUAGE_VERSION). Valid values are integers, such as
"130". Mesa will not really implement all the features of the given language version
if it's higher than what's normally reported. (for developers only)
-<li>MESA_GLSL_CACHE_DISABLE - if set, disables the GLSL shader cache
+<li>MESA_GLSL_CACHE_DISABLE - if set to `true`, disables the GLSL shader cache
<li>MESA_GLSL_CACHE_MAX_SIZE - if set, determines the maximum size of
the on-disk cache of compiled GLSL programs. Should be set to a number
optionally followed by 'K', 'M', or 'G' to specify a size in
home directory.
<li>MESA_GLSL - <a href="shading.html#envvars">shading language compiler options</a>
<li>MESA_NO_MINMAX_CACHE - when set, the minmax index cache is globally disabled.
+<li>MESA_SHADER_CAPTURE_PATH - see <a href="shading.html#capture">Capturing Shaders</a></li>
+<li>MESA_SHADER_DUMP_PATH and MESA_SHADER_READ_PATH - see <a href="shading.html#replacement">Experimenting with Shader Replacements</a></li>
</ul>
<li>perfmon - emit messages about AMD_performance_monitor</li>
<li>pix - emit messages about pixel operations</li>
<li>prim - emit messages about drawing primitives</li>
+ <li>reemit - mark all state dirty on each draw call</li>
<li>sf - emit messages about the strips & fans unit (for old gens, includes the SF program)</li>
<li>shader_time - record how much GPU time is spent in each shader</li>
<li>spill_fs - force spilling of all registers in the scalar backend (useful to debug spilling code)</li>
<li>spill_vec4 - force spilling of all registers in the vec4 backend (useful to debug spilling code)</li>
<li>state - emit messages about state flag tracking</li>
+ <li>submit - emit batchbuffer usage statistics</li>
<li>sync - after sending each batch, emit a message and wait for that batch to finish rendering</li>
<li>tcs - dump shader assembly for tessellation control shaders</li>
<li>tes - dump shader assembly for tessellation evaluation shaders</li>
Use kill -10 <pid> to toggle the hud as desired.
<li>GALLIUM_HUD_DUMP_DIR - specifies a directory for writing the displayed
hud values into files.
-<li>GALLIUM_DRIVER - useful in combination with LIBGL_ALWAYS_SOFTWARE=1 for
+<li>GALLIUM_DRIVER - useful in combination with LIBGL_ALWAYS_SOFTWARE=true for
choosing one of the software renderers "softpipe", "llvmpipe" or "swr".
<li>GALLIUM_LOG_FILE - specifies a file for logging all errors, warnings, etc.
rather than stderr.