docs: document MESA_DEBUG=context
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
diff --git a/docs/envvars.html b/docs/envvars.html
index af1a30c..5dd7bab 100644
--- a/docs/envvars.html
+++ b/docs/envvars.html
@@ -60,6 +60,8 @@
<li>flush - flush after each drawing command</li>
<li>incomplete_tex - extra debug messages when a texture is incomplete</li>
<li>incomplete_fbo - extra debug messages when a fbo is incomplete</li>
+ <li>context - create a debug context (see GLX_CONTEXT_DEBUG_BIT_ARB) and
+ print error and performance messages to stderr (or MESA_LOG_FILE).</li>
</ul>
<li>MESA_LOG_FILE - specifies a file name for logging all errors, warnings,
etc., rather than stderr