doc: document GALLIUM_DRIVER
v2: Add dot at end of sentence
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
diff --git a/docs/envvars.html b/docs/envvars.html
index 789f5e9..cf57ca5 100644
--- a/docs/envvars.html
+++ b/docs/envvars.html
@@ -217,6 +217,8 @@
disable for unencumbered viewing the rest of the time. For example, set
GALLIUM_HUD_VISIBLE to false and GALLIUM_HUD_TOGGLE_SIGNAL to 10 (SIGUSR1).
Use kill -10 <pid> to toggle the hud as desired.
+<li>GALLIUM_DRIVER - useful in combination with LIBGL_ALWAYS_SOFTWARE=1 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.
<li>GALLIUM_PRINT_OPTIONS - if non-zero, print all the Gallium environment