docs: use code-tags for envvars and options

This makes it a bit easier to tell what's what.

Signed-off-by: Erik Faye-Lund <[email protected]>
Reviewed-by: Emil Velikov <[email protected]>
Reviewed-by: Eric Engestrom <[email protected]>

1 files changed, 143 insertions, 142 deletions

diff --git a/docs/envvars.html b/docs/envvars.html
index c6e23731065..b22c180b499 100644
--- a/docs/envvars.html
+++ b/docs/envvars.html
@@ -26,40 +26,40 @@ sometimes be useful for debugging end-user issues.
 <h2>LibGL environment variables</h2>
 
 <dl>
-<dt>LIBGL_DEBUG</dt>
+<dt><code>LIBGL_DEBUG</code></dt>
 <dd>If defined debug information will be printed to stderr.
     If set to 'verbose' additional information will be printed.</dd>
-<dt>LIBGL_DRIVERS_PATH</dt>
+<dt><code>LIBGL_DRIVERS_PATH</code></dt>
 <dd>colon-separated list of paths to search for DRI drivers</dd>
-<dt>LIBGL_ALWAYS_INDIRECT</dt>
+<dt><code>LIBGL_ALWAYS_INDIRECT</code></dt>
 <dd>if set to `true`, forces an indirect rendering context/connection.</dd>
-<dt>LIBGL_ALWAYS_SOFTWARE</dt>
+<dt><code>LIBGL_ALWAYS_SOFTWARE</code></dt>
 <dd>if set to `true`, always use software rendering</dd>
-<dt>LIBGL_NO_DRAWARRAYS</dt>
+<dt><code>LIBGL_NO_DRAWARRAYS</code></dt>
 <dd>if set to `true`, do not use DrawArrays GLX protocol (for debugging)</dd>
-<dt>LIBGL_SHOW_FPS</dt>
+<dt><code>LIBGL_SHOW_FPS</code></dt>
 <dd>print framerate to stdout based on the number of glXSwapBuffers
     calls per second.</dd>
-<dt>LIBGL_DRI3_DISABLE</dt>
+<dt><code>LIBGL_DRI3_DISABLE</code></dt>
 <dd>disable DRI3 if set to `true`.</dd>
 </dl>
 
 <h2>Core Mesa environment variables</h2>
 
 <dl>
-<dt>MESA_NO_ASM</dt>
+<dt><code>MESA_NO_ASM</code></dt>
 <dd>if set, disables all assembly language optimizations</dd>
-<dt>MESA_NO_MMX</dt>
+<dt><code>MESA_NO_MMX</code></dt>
 <dd>if set, disables Intel MMX optimizations</dd>
-<dt>MESA_NO_3DNOW</dt>
+<dt><code>MESA_NO_3DNOW</code></dt>
 <dd>if set, disables AMD 3DNow! optimizations</dd>
-<dt>MESA_NO_SSE</dt>
+<dt><code>MESA_NO_SSE</code></dt>
 <dd>if set, disables Intel SSE optimizations</dd>
-<dt>MESA_NO_ERROR</dt>
+<dt><code>MESA_NO_ERROR</code></dt>
 <dd>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.</dd>
-<dt>MESA_DEBUG</dt>
+<dt><code>MESA_DEBUG</code></dt>
 <dd>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 occurred, and possibly why, will be
@@ -67,34 +67,34 @@ sometimes be useful for debugging end-user issues.
     output). MESA_DEBUG accepts the following comma-separated list of named
     flags, which adds extra behaviour to just set MESA_DEBUG=1:
     <dl>
-      <dt>silent</dt>
+      <dt><code>silent</code></dt>
       <dd>turn off debug messages. Only useful for debug builds.</dd>
-      <dt>flush</dt>
+      <dt><code>flush</code></dt>
       <dd>flush after each drawing command</dd>
-      <dt>incomplete_tex</dt>
+      <dt><code>incomplete_tex</code></dt>
       <dd>extra debug messages when a texture is incomplete</dd>
-      <dt>incomplete_fbo</dt>
+      <dt><code>incomplete_fbo</code></dt>
       <dd>extra debug messages when a fbo is incomplete</dd>
-      <dt>context</dt>
+      <dt><code>context</code></dt>
       <dd>create a debug context (see GLX_CONTEXT_DEBUG_BIT_ARB) and print
           error and performance messages to stderr (or MESA_LOG_FILE).</dd>
     </dl>
 </dd>
-<dt>MESA_LOG_FILE</dt>
+<dt><code>MESA_LOG_FILE</code></dt>
 <dd>specifies a file name for logging all errors, warnings,
     etc., rather than stderr</dd>
-<dt>MESA_TEX_PROG</dt>
+<dt><code>MESA_TEX_PROG</code></dt>
 <dd>if set, implement conventional texture env modes with
     fragment programs (intended for developers only)</dd>
-<dt>MESA_TNL_PROG</dt>
+<dt><code>MESA_TNL_PROG</code></dt>
 <dd>if set, implement conventional vertex transformation operations with
     vertex programs (intended for developers only). Setting this variable
     automatically sets the MESA_TEX_PROG variable as well.</dd>
-<dt>MESA_EXTENSION_OVERRIDE</dt>
+<dt><code>MESA_EXTENSION_OVERRIDE</code></dt>
 <dd>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.</dd>
-<dt>MESA_EXTENSION_MAX_YEAR</dt>
+<dt><code>MESA_EXTENSION_MAX_YEAR</code></dt>
 <dd>The GL_EXTENSIONS string returned by Mesa is sorted by extension year.
     If this variable is set to year X, only extensions defined on or before
     year X will be reported. This is to work-around a bug in some games where
@@ -102,7 +102,7 @@ sometimes be useful for debugging end-user issues.
     truncating. If the extension string is too long, the buffer overrun can
     cause the game to crash. This is a work-around for that.
 </dd>
-<dt>MESA_GL_VERSION_OVERRIDE</dt>
+<dt><code>MESA_GL_VERSION_OVERRIDE</code></dt>
 <dd>changes the value returned by
 glGetString(GL_VERSION) and possibly the GL API type.
 <ul>
@@ -119,32 +119,32 @@ glGetString(GL_VERSION) and possibly the GL API type.
   <li>GL versions &gt;= 3.2 are set to a Core profile
   <li>Examples:
   <dl>
-    <dt>2.1</dt>
+    <dt><code>2.1</code></dt>
     <dd>select a compatibility (non-Core) profile with GL version 2.1.</dd>
-    <dt>3.0</dt>
+    <dt><code>3.0</code></dt>
     <dd>select a compatibility (non-Core) profile with GL version 3.0.</dd>
-    <dt>3.0FC</dt>
+    <dt><code>3.0FC</code></dt>
     <dd>select a Core+Forward Compatible profile with GL version 3.0.</dd>
-    <dt>3.1</dt>
+    <dt><code>3.1</code></dt>
     <dd>select GL version 3.1 with GL_ARB_compatibility enabled per the
         driver default.</dd>
-    <dt>3.1FC</dt>
+    <dt><code>3.1FC</code></dt>
     <dd>select GL version 3.1 with forward compatibility and
         GL_ARB_compatibility disabled.</dd>
-    <dt>3.1COMPAT</dt>
+    <dt><code>3.1COMPAT</code></dt>
     <dd>select GL version 3.1 with GL_ARB_compatibility enabled.</dd>
-    <dt>X.Y</dt>
+    <dt><code>X.Y</code></dt>
     <dd>override GL version to X.Y without changing the profile.</dd>
-    <dt>X.YFC</dt>
+    <dt><code>X.YFC</code></dt>
     <dd>select a Core+Forward Compatible profile with GL version X.Y.</dd>
-    <dt>X.YCOMPAT</dt>
+    <dt><code>X.YCOMPAT</code></dt>
     <dd>select a Compatibility profile with GL version X.Y.</dd>
   </dl>
   <li>Mesa may not really implement all the features of the given
       version. (for developers only)
 </ul>
 </dd>
-<dt>MESA_GLES_VERSION_OVERRIDE</dt>
+<dt><code>MESA_GLES_VERSION_OVERRIDE</code></dt>
 <dd>changes the value returned by glGetString(GL_VERSION) for OpenGL ES.
 <ul>
 <li> The format should be MAJOR.MINOR
@@ -153,15 +153,15 @@ glGetString(GL_VERSION) and possibly the GL API type.
 (for developers only)
 </ul>
 </dd>
-<dt>MESA_GLSL_VERSION_OVERRIDE</dt>
+<dt><code>MESA_GLSL_VERSION_OVERRIDE</code></dt>
 <dd>changes the value returned by 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)
 </dd>
-<dt>MESA_GLSL_CACHE_DISABLE</dt>
+<dt><code>MESA_GLSL_CACHE_DISABLE</code></dt>
 <dd>if set to `true`, disables the GLSL shader cache</dd>
-<dt>MESA_GLSL_CACHE_MAX_SIZE</dt>
+<dt><code>MESA_GLSL_CACHE_MAX_SIZE</code></dt>
 <dd>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 kilobytes, megabytes, or gigabytes. By default,
@@ -170,21 +170,21 @@ glGetString(GL_VERSION) and possibly the GL API type.
     Mesa is installed for on your system. For example under the default
     settings you may end up with a 1GB cache for x86_64 and another 1GB cache
     for i386.</dd>
-<dt>MESA_GLSL_CACHE_DIR</dt>
+<dt><code>MESA_GLSL_CACHE_DIR</code></dt>
 <dd>if set, determines the directory to be used for the on-disk cache of
     compiled GLSL programs. If this variable is not set, then the cache will
     be stored in $XDG_CACHE_HOME/mesa_shader_cache (if that variable is set),
     or else within .cache/mesa_shader_cache within the user's home directory.
 </dd>
-<dt>MESA_GLSL</dt>
+<dt><code>MESA_GLSL</code></dt>
 <dd><a href="shading.html#envvars">shading language compiler options</a></dd>
-<dt>MESA_NO_MINMAX_CACHE</dt>
+<dt><code>MESA_NO_MINMAX_CACHE</code></dt>
 <dd>when set, the minmax index cache is globally disabled.</dd>
-<dt>MESA_SHADER_CAPTURE_PATH</dt>
+<dt><code>MESA_SHADER_CAPTURE_PATH</code></dt>
 <dd>see <a href="shading.html#capture">Capturing Shaders</a></dd>
-<dt>MESA_SHADER_DUMP_PATH and MESA_SHADER_READ_PATH</dt>
+<dt><code>MESA_SHADER_DUMP_PATH</code> and <code>MESA_SHADER_READ_PATH</code></dt>
 <dd>see <a href="shading.html#replacement">Experimenting with Shader Replacements</a></dd>
-<dt>MESA_VK_VERSION_OVERRIDE</dt>
+<dt><code>MESA_VK_VERSION_OVERRIDE</code></dt>
 <dd>changes the Vulkan physical device version
     as returned in VkPhysicalDeviceProperties::apiVersion.
   <ul>
@@ -205,24 +205,24 @@ 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>
 <dl>
-<dt>MESA_RGB_VISUAL</dt>
+<dt><code>MESA_RGB_VISUAL</code></dt>
 <dd>specifies the X visual and depth for RGB mode</dd>
-<dt>MESA_CI_VISUAL</dt>
+<dt><code>MESA_CI_VISUAL</code></dt>
 <dd>specifies the X visual and depth for CI mode</dd>
-<dt>MESA_BACK_BUFFER</dt>
+<dt><code>MESA_BACK_BUFFER</code></dt>
 <dd>specifies how to implement the back color buffer, either "pixmap" or
     "ximage"</dd>
-<dt>MESA_GAMMA</dt>
+<dt><code>MESA_GAMMA</code></dt>
 <dd>gamma correction coefficients for red, green, blue channels</dd>
-<dt>MESA_XSYNC</dt>
+<dt><code>MESA_XSYNC</code></dt>
 <dd>enable synchronous X behavior (for debugging only)</dd>
-<dt>MESA_GLX_FORCE_CI</dt>
+<dt><code>MESA_GLX_FORCE_CI</code></dt>
 <dd>if set, force GLX to treat 8bpp visuals as CI visuals</dd>
-<dt>MESA_GLX_FORCE_ALPHA</dt>
+<dt><code>MESA_GLX_FORCE_ALPHA</code></dt>
 <dd>if set, forces RGB windows to have an alpha channel.</dd>
-<dt>MESA_GLX_DEPTH_BITS</dt>
+<dt><code>MESA_GLX_DEPTH_BITS</code></dt>
 <dd>specifies default number of bits for depth buffer.</dd>
-<dt>MESA_GLX_ALPHA_BITS</dt>
+<dt><code>MESA_GLX_ALPHA_BITS</code></dt>
 <dd>specifies default number of bits for alpha channel.</dd>
 </dl>
 
@@ -230,99 +230,100 @@ See the <a href="xlibdriver.html">Xlib software driver page</a> for details.
 <h2>i945/i965 driver environment variables (non-Gallium)</h2>
 
 <dl>
-<dt>INTEL_NO_HW</dt>
+<dt><code>INTEL_NO_HW</code></dt>
 <dd>if set to 1, prevents batches from being submitted to the hardware.
     This is useful for debugging hangs, etc.</dd>
-<dt>INTEL_DEBUG</dt>
+<dt><code>INTEL_DEBUG</code></dt>
 <dd>a comma-separated list of named flags, which do various things:
 <dl>
-   <dt>ann</dt>
+   <dt><code>ann</code></dt>
    <dd>annotate IR in assembly dumps</dd>
-   <dt>aub</dt>
+   <dt><code>aub</code></dt>
    <dd>dump batches into an AUB trace for use with simulation tools</dd>
-   <dt>bat</dt>
+   <dt><code>bat</code></dt>
    <dd>emit batch information</dd>
-   <dt>blit</dt>
+   <dt><code>blit</code></dt>
    <dd>emit messages about blit operations</dd>
-   <dt>blorp</dt>
+   <dt><code>blorp</code></dt>
    <dd>emit messages about the blorp operations (blits &amp; clears)</dd>
-   <dt>buf</dt>
+   <dt><code>buf</code></dt>
    <dd>emit messages about buffer objects</dd>
-   <dt>clip</dt>
+   <dt><code>clip</code></dt>
    <dd>emit messages about the clip unit (for old gens, includes the CLIP program)</dd>
-   <dt>color</dt>
+   <dt><code>color</code></dt>
    <dd>use color in output</dd>
-   <dt>cs</dt>
+   <dt><code>cs</code></dt>
    <dd>dump shader assembly for compute shaders</dd>
-   <dt>do32</dt>
+   <dt><code>do32</code></dt>
    <dd>generate compute shader SIMD32 programs even if workgroup size doesn't exceed the SIMD16 limit</dd>
-   <dt>dri</dt>
+   <dt><code>dri</code></dt>
    <dd>emit messages about the DRI interface</dd>
-   <dt>fbo</dt>
+   <dt><code>fbo</code></dt>
    <dd>emit messages about framebuffers</dd>
-   <dt>fs</dt>
+   <dt><code>fs</code></dt>
    <dd>dump shader assembly for fragment shaders</dd>
-   <dt>gs</dt>
+   <dt><code>gs</code></dt>
    <dd>dump shader assembly for geometry shaders</dd>
-   <dt>hex</dt>
+   <dt><code>hex</code></dt>
    <dd>print instruction hex dump with the disassembly</dd>
-   <dt>l3</dt>
+   <dt><code>l3</code></dt>
    <dd>emit messages about the new L3 state during transitions</dd>
-   <dt>miptree</dt>
+   <dt><code>miptree</code></dt>
    <dd>emit messages about miptrees</dd>
-   <dt>no8</dt>
+   <dt><code>no8</code></dt>
    <dd>don't generate SIMD8 fragment shader</dd>
-   <dt>no16</dt>
+   <dt><code>no16</code></dt>
    <dd>suppress generation of 16-wide fragment shaders. useful for debugging broken shaders</dd>
-   <dt>nocompact</dt>
+   <dt><code>nocompact</code></dt>
    <dd>disable instruction compaction</dd>
-   <dt>nodualobj</dt>
+   <dt><code>nodualobj</code></dt>
    <dd>suppress generation of dual-object geometry shader code</dd>
-   <dt>norbc</dt>
+   <dt><code>norbc</code></dt>
    <dd>disable single sampled render buffer compression</dd>
-   <dt>optimizer</dt>
+   <dt><code>optimizer</code></dt>
    <dd>dump shader assembly to files at each optimization pass and iteration that make progress</dd>
-   <dt>perf</dt>
+   <dt><code>perf</code></dt>
    <dd>emit messages about performance issues</dd>
-   <dt>perfmon</dt>
+   <dt><code>perfmon</code></dt>
    <dd>emit messages about AMD_performance_monitor</dd>
-   <dt>pix</dt>
+   <dt><code>pix</code></dt>
    <dd>emit messages about pixel operations</dd>
-   <dt>prim</dt>
+   <dt><code>prim</code></dt>
    <dd>emit messages about drawing primitives</dd>
-   <dt>reemit</dt>
+   <dt><code>reemit</code></dt>
    <dd>mark all state dirty on each draw call</dd>
-   <dt>sf</dt>
+   <dt><code>sf</code></dt>
    <dd>emit messages about the strips &amp; fans unit (for old gens, includes the SF program)</dd>
-   <dt>shader_time</dt>
+   <dt><code>shader_time</code></dt>
    <dd>record how much GPU time is spent in each shader</dd>
-   <dt>spill_fs</dt>
+   <dt><code>spill_fs</code></dt>
    <dd>force spilling of all registers in the scalar backend (useful to debug spilling code)</dd>
-   <dt>spill_vec4</dt>
+   <dt><code>spill_vec4</code></dt>
    <dd>force spilling of all registers in the vec4 backend (useful to debug spilling code)</dd>
-   <dt>state</dt>
+   <dt><code>state</code></dt>
    <dd>emit messages about state flag tracking</dd>
-   <dt>submit</dt>
+   <dt><code>submit</code></dt>
    <dd>emit batchbuffer usage statistics</dd>
-   <dt>sync</dt>
+   <dt><code>sync</code></dt>
    <dd>after sending each batch, emit a message and wait for that batch to finish rendering</dd>
-   <dt>tcs</dt>
+   <dt><code>tcs</code></dt>
    <dd>dump shader assembly for tessellation control shaders</dd>
-   <dt>tes</dt>
+   <dt><code>tes</code></dt>
    <dd>dump shader assembly for tessellation evaluation shaders</dd>
-   <dt>tex</dt>
+   <dt><code>tex</code></dt>
    <dd>emit messages about textures.</dd>
-   <dt>urb</dt>
+   <dt><code>urb</code></dt>
    <dd>emit messages about URB setup</dd>
-   <dt>vert</dt>
+   <dt><code>vert</code></dt>
    <dd>emit messages about vertex assembly</dd>
-   <dt>vs</dt>
+   <dt><code>vs</code></dt>
    <dd>dump shader assembly for vertex shaders</dd>
 </dl>
 </dd>
-<dt>INTEL_SCALAR_VS (or TCS, TES, GS)</dt>
+<dt><code>INTEL_SCALAR_VS</code> (or <code>TCS</code>, <code>TES</code>,
+    <code>GS</code>)</dt>
 <dd>force scalar/vec4 mode for a shader stage (Gen8-9 only)</dd>
-<dt>INTEL_PRECISE_TRIG</dt>
+<dt><code>INTEL_PRECISE_TRIG</code></dt>
 <dd>if set to 1, true or yes, then the driver prefers accuracy over
     performance in trig functions.</dd>
 </dl>
@@ -331,7 +332,7 @@ See the <a href="xlibdriver.html">Xlib software driver page</a> for details.
 <h2>Radeon driver environment variables (radeon, r200, and r300g)</h2>
 
 <dl>
-<dt>RADEON_NO_TCL</dt>
+<dt><code>RADEON_NO_TCL</code></dt>
 <dd>if set, disable hardware-accelerated Transform/Clip/Lighting.</dd>
 </dl>
 
@@ -347,45 +348,45 @@ Mesa EGL supports different sets of environment variables.  See the
 <h2>Gallium environment variables</h2>
 
 <dl>
-<dt>GALLIUM_HUD</dt>
+<dt><code>GALLIUM_HUD</code></dt>
 <dd>draws various information on the screen, like framerate,
     cpu load, driver statistics, performance counters, etc.
     Set GALLIUM_HUD=help and run e.g. glxgears for more info.</dd>
-<dt>GALLIUM_HUD_PERIOD</dt>
+<dt><code>GALLIUM_HUD_PERIOD</code></dt>
 <dd>sets the hud update rate in seconds (float). Use zero
     to update every frame. The default period is 1/2 second.</dd>
-<dt>GALLIUM_HUD_VISIBLE</dt>
+<dt><code>GALLIUM_HUD_VISIBLE</code></dt>
 <dd>control default visibility, defaults to true.</dd>
-<dt>GALLIUM_HUD_TOGGLE_SIGNAL</dt>
+<dt><code>GALLIUM_HUD_TOGGLE_SIGNAL</code></dt>
 <dd>toggle visibility via user specified signal.
     Especially useful to toggle hud at specific points of application and
     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 &lt;pid&gt; to toggle the hud as desired.</dd>
-<dt>GALLIUM_HUD_DUMP_DIR</dt>
+<dt><code>GALLIUM_HUD_DUMP_DIR</code></dt>
 <dd>specifies a directory for writing the displayed hud values into files.</dd>
-<dt>GALLIUM_DRIVER</dt>
+<dt><code>GALLIUM_DRIVER</code></dt>
 <dd>useful in combination with LIBGL_ALWAYS_SOFTWARE=true for choosing one
     of the software renderers "softpipe", "llvmpipe" or "swr".</dd>
-<dt>GALLIUM_LOG_FILE</dt>
+<dt><code>GALLIUM_LOG_FILE</code></dt>
 <dd>specifies a file for logging all errors, warnings, etc.
     rather than stderr.</dd>
-<dt>GALLIUM_PRINT_OPTIONS</dt>
+<dt><code>GALLIUM_PRINT_OPTIONS</code></dt>
 <dd>if non-zero, print all the Gallium environment variables which are
     used, and their current values.</dd>
-<dt>GALLIUM_DUMP_CPU</dt>
+<dt><code>GALLIUM_DUMP_CPU</code></dt>
 <dd>if non-zero, print information about the CPU on start-up</dd>
-<dt>TGSI_PRINT_SANITY</dt>
+<dt><code>TGSI_PRINT_SANITY</code></dt>
 <dd>if set, do extra sanity checking on TGSI shaders and
     print any errors to stderr.</dd>
-<dt>DRAW_FSE</dt>
+<dt><code>DRAW_FSE</code></dt>
 <dd>???</dd>
-<dt>DRAW_NO_FSE</dt>
+<dt><code>DRAW_NO_FSE</code></dt>
 <dd>???</dd>
-<dt>DRAW_USE_LLVM</dt>
+<dt><code>DRAW_USE_LLVM</code></dt>
 <dd>if set to zero, the draw module will not use LLVM to execute
     shaders, vertex fetch, etc.</dd>
-<dt>ST_DEBUG</dt>
+<dt><code>ST_DEBUG</code></dt>
 <dd>controls debug output from the Mesa/Gallium state tracker.
     Setting to "tgsi", for example, will print all the TGSI shaders.
     See src/mesa/state_tracker/st_debug.c for other options.</dd>
@@ -394,15 +395,15 @@ Mesa EGL supports different sets of environment variables.  See the
 <h3>Clover state tracker environment variables</h3>
 
 <dl>
-<dt>CLOVER_EXTRA_BUILD_OPTIONS</dt>
+<dt><code>CLOVER_EXTRA_BUILD_OPTIONS</code></dt>
 <dd>allows specifying additional compiler and linker
     options. Specified options are appended after the options set by the OpenCL
     program in clBuildProgram.</dd>
-<dt>CLOVER_EXTRA_COMPILE_OPTIONS</dt>
+<dt><code>CLOVER_EXTRA_COMPILE_OPTIONS</code></dt>
 <dd>allows specifying additional compiler
     options. Specified options are appended after the options set by the OpenCL
     program in clCompileProgram.</dd>
-<dt>CLOVER_EXTRA_LINK_OPTIONS</dt>
+<dt><code>CLOVER_EXTRA_LINK_OPTIONS</code></dt>
 <dd>allows specifying additional linker
     options. Specified options are appended after the options set by the OpenCL
     program in clLinkProgram.</dd>
@@ -411,13 +412,13 @@ Mesa EGL supports different sets of environment variables.  See the
 
 <h3>Softpipe driver environment variables</h3>
 <dl>
-<dt>SOFTPIPE_DUMP_FS</dt>
+<dt><code>SOFTPIPE_DUMP_FS</code></dt>
 <dd>if set, the softpipe driver will print fragment shaders to stderr</dd>
-<dt>SOFTPIPE_DUMP_GS</dt>
+<dt><code>SOFTPIPE_DUMP_GS</code></dt>
 <dd>if set, the softpipe driver will print geometry shaders to stderr</dd>
-<dt>SOFTPIPE_NO_RAST</dt>
+<dt><code>SOFTPIPE_NO_RAST</code></dt>
 <dd>if set, rasterization is no-op'd.  For profiling purposes.</dd>
-<dt>SOFTPIPE_USE_LLVM</dt>
+<dt><code>SOFTPIPE_USE_LLVM</code></dt>
 <dd>if set, the softpipe driver will try to use LLVM JIT for
     vertex shading processing.</dd>
 </dl>
@@ -425,15 +426,15 @@ Mesa EGL supports different sets of environment variables.  See the
 
 <h3>LLVMpipe driver environment variables</h3>
 <dl>
-<dt>LP_NO_RAST</dt>
+<dt><code>LP_NO_RAST</code></dt>
 <dd>if set LLVMpipe will no-op rasterization</dd>
-<dt>LP_DEBUG</dt>
+<dt><code>LP_DEBUG</code></dt>
 <dd>a comma-separated list of debug options is accepted.  See the
     source code for details.</dd>
-<dt>LP_PERF</dt>
+<dt><code>LP_PERF</code></dt>
 <dd>a comma-separated list of options to selectively no-op various
     parts of the driver.  See the source code for details.</dd>
-<dt>LP_NUM_THREADS</dt>
+<dt><code>LP_NUM_THREADS</code></dt>
 <dd>an integer indicating how many threads to use for rendering.
     Zero turns off threading completely.  The default value is the number of CPU
     cores present.</dd>
@@ -441,18 +442,18 @@ Mesa EGL supports different sets of environment variables.  See the
 
 <h3>VMware SVGA driver environment variables</h3>
 <dl>
-<dt>SVGA_FORCE_SWTNL</dt>
+<dt><code>SVGA_FORCE_SWTNL</code></dt>
 <dd>force use of software vertex transformation</dd>
-<dt>SVGA_NO_SWTNL</dt>
+<dt><code>SVGA_NO_SWTNL</code></dt>
 <dd>don't allow software vertex transformation fallbacks (will often result
     in incorrect rendering).</dd>
-<dt>SVGA_DEBUG</dt>
+<dt><code>SVGA_DEBUG</code></dt>
 <dd>for dumping shaders, constant buffers, etc.  See the code for
     details.</dd>
-<dt>SVGA_EXTRA_LOGGING</dt>
+<dt><code>SVGA_EXTRA_LOGGING</code></dt>
 <dd>if set, enables extra logging to the vmware.log file, such as the
     OpenGL program's name and command line arguments.</dd>
-<dt>SVGA_NO_LOGGING</dt>
+<dt><code>SVGA_NO_LOGGING</code></dt>
 <dd>if set, disables logging to the vmware.log file. This is useful when
     using Valgrind because it otherwise crashes when initializing the host
     log feature.</dd>
@@ -461,7 +462,7 @@ Mesa EGL supports different sets of environment variables.  See the
 
 <h3>WGL environment variables</h3>
 <dl>
-<dt>WGL_SWAP_INTERVAL</dt>
+<dt><code>WGL_SWAP_INTERVAL</code></dt>
 <dd>to set a swap interval, equivalent to calling wglSwapIntervalEXT()
     in an application.  If this environment variable is set, application
     calls to wglSwapIntervalEXT() will have no effect.</dd>
@@ -469,37 +470,37 @@ Mesa EGL supports different sets of environment variables.  See the
 
 <h3>VA-API state tracker environment variables</h3>
 <dl>
-<dt>VAAPI_MPEG4_ENABLED</dt>
+<dt><code>VAAPI_MPEG4_ENABLED</code></dt>
 <dd>enable MPEG4 for VA-API, disabled by default.</dd>
 </dl>
 
 
 <h3>VC4 driver environment variables</h3>
 <dl>
-<dt>VC4_DEBUG</dt>
+<dt><code>VC4_DEBUG</code></dt>
 <dd>a comma-separated list of named flags, which do various things:
 <dl>
-   <dt>cl</dt>
+   <dt><code>cl</code></dt>
    <dd>dump command list during creation</dd>
-   <dt>qpu</dt>
+   <dt><code>qpu</code></dt>
    <dd>dump generated QPU instructions</dd>
-   <dt>qir</dt>
+   <dt><code>qir</code></dt>
    <dd>dump QPU IR during program compile</dd>
-   <dt>nir</dt>
+   <dt><code>nir</code></dt>
    <dd>dump NIR during program compile</dd>
-   <dt>tgsi</dt>
+   <dt><code>tgsi</code></dt>
    <dd>dump TGSI during program compile</dd>
-   <dt>shaderdb</dt>
+   <dt><code>shaderdb</code></dt>
    <dd>dump program compile information for shader-db analysis</dd>
-   <dt>perf</dt>
+   <dt><code>perf</code></dt>
    <dd>print during performance-related events</dd>
-   <dt>norast</dt>
+   <dt><code>norast</code></dt>
    <dd>skip actual hardware execution of commands</dd>
-   <dt>always_flush</dt>
+   <dt><code>always_flush</code></dt>
    <dd>flush after each draw call</dd>
-   <dt>always_sync</dt>
+   <dt><code>always_sync</code></dt>
    <dd>wait for finish after each flush</dd>
-   <dt>dump</dt>
+   <dt><code>dump</code></dt>
    <dd>write a GPU command stream trace file (VC4 simulator only)</dd>
 </dl>
 </dd>