X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=docs%2Fenvvars.html;h=ea42a50779bc74176545e3fd1d917464fcda823d;hb=df4fc684920840220bb1fb92281e40157b4db618;hp=bdfe9991a6c86e630e927de20092221b309bf7b7;hpb=a26e82b81dc3cebf13c8fd418d87977f2ab2dbb5;p=mesa.git

diff --git a/docs/envvars.html b/docs/envvars.html
index bdfe9991a6c..ea42a50779b 100644
--- a/docs/envvars.html
+++ b/docs/envvars.html
@@ -29,12 +29,12 @@ sometimes be useful for debugging end-user issues.
 <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>
 
 
@@ -46,12 +46,26 @@ sometimes be useful for debugging end-user issues.
 <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 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,
    if the application generates a GL_INVALID_ENUM error, a corresponding error
    message indicating where the error occurred, and possibly why, will be
    printed to stderr.<br>
-   If the value of MESA_DEBUG is 'FP' floating point arithmetic errors will
-   generate exceptions.
+
+   For release builds, MESA_DEBUG defaults to off (no debug output).
+
+   MESA_DEBUG accepts the following comma-separated list of named
+   flags, which adds extra behaviour to just set MESA_DEBUG=1:
+   <ul>
+     <li>silent - turn off debug messages. Only useful for debug builds.</li>
+     <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
 <li>MESA_TEX_PROG - if set, implement conventional texture env modes with
@@ -91,11 +105,36 @@ This is only valid for versions &gt;= 3.0.
 <li> Mesa may not really implement all the features of the given version.
 (for developers only)
 </ul>
+<li>MESA_GLES_VERSION_OVERRIDE - changes the value returned by
+glGetString(GL_VERSION) for OpenGL ES.
+<ul>
+<li> The format should be MAJOR.MINOR
+<li> Examples: 2.0, 3.0, 3.1
+<li> Mesa may not really implement all the features of the given version.
+(for developers only)
+</ul>
 <li>MESA_GLSL_VERSION_OVERRIDE - 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)
+<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
+kilobytes, megabytes, or gigabytes. By default, gigabytes will be
+assumed. And if unset, a maximum size of 1GB will be used. Note: A separate
+cache might be created for each architecture that 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.
+<li>MESA_GLSL_CACHE_DIR - 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 (if
+that variable is set), or else within .cache/mesa within the user's
+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>
 
 
@@ -126,35 +165,51 @@ See the <a href="xlibdriver.html">Xlib software driver page</a> for details.
    This is useful for debugging hangs, etc.</li>
 <li>INTEL_DEBUG - a comma-separated list of named flags, which do various things:
 <ul>
-   <li>tex - emit messages about textures.</li>
-   <li>state - emit messages about state flag tracking</li>
-   <li>blit - emit messages about blit operations</li>
-   <li>miptree - emit messages about miptrees</li>
-   <li>perf - emit messages about performance issues</li>
-   <li>perfmon - emit messages about AMD_performance_monitor</li>
+   <li>ann - annotate IR in assembly dumps</li>
+   <li>aub - dump batches into an AUB trace for use with simulation tools</li>
    <li>bat - emit batch information</li>
-   <li>pix - emit messages about pixel operations</li>
+   <li>blit - emit messages about blit operations</li>
+   <li>blorp - emit messages about the blorp operations (blits &amp; clears)</li>
    <li>buf - emit messages about buffer objects</li>
-   <li>reg - emit messages about regions</li>
+   <li>clip - emit messages about the clip unit (for old gens, includes the CLIP program)</li>
+   <li>color - use color in output</li>
+   <li>cs - dump shader assembly for compute shaders</li>
+   <li>do32 - generate compute shader SIMD32 programs even if workgroup size doesn't exceed the SIMD16 limit</li>
+   <li>dri - emit messages about the DRI interface</li>
    <li>fbo - emit messages about framebuffers</li>
    <li>fs - dump shader assembly for fragment shaders</li>
    <li>gs - dump shader assembly for geometry shaders</li>
-   <li>sync - emit messages about synchronization</li>
+   <li>hex - print instruction hex dump with the disassembly</li>
+   <li>l3 - emit messages about the new L3 state during transitions</li>
+   <li>miptree - emit messages about miptrees</li>
+   <li>no8 - don't generate SIMD8 fragment shader</li>
+   <li>no16 - suppress generation of 16-wide fragment shaders. useful for debugging broken shaders</li>
+   <li>nocompact - disable instruction compaction</li>
+   <li>nodualobj - suppress generation of dual-object geometry shader code</li>
+   <li>norbc - disable single sampled render buffer compression</li>
+   <li>optimizer - dump shader assembly to files at each optimization pass and iteration that make progress</li>
+   <li>perf - emit messages about performance issues</li>
+   <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>vert - emit messages about vertex assembly</li>
-   <li>dri - emit messages about the DRI interface</li>
+   <li>reemit - mark all state dirty on each draw call</li>
    <li>sf - emit messages about the strips &amp; fans unit (for old gens, includes the SF program)</li>
-   <li>stats - enable statistics counters. you probably actually want perfmon or intel_gpu_top instead.</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>
+   <li>tex - emit messages about textures.</li>
    <li>urb - emit messages about URB setup</li>
+   <li>vert - emit messages about vertex assembly</li>
    <li>vs - dump shader assembly for vertex shaders</li>
-   <li>clip - emit messages about the clip unit (for old gens, includes the CLIP program)</li>
-   <li>aub - dump batches into an AUB trace for use with simulation tools</li>
-   <li>shader_time - record how much GPU time is spent in each shader</li>
-   <li>no16 - suppress generation of 16-wide fragment shaders. useful for debugging broken shaders</li>
-   <li>blorp - emit messages about the blorp operations (blits &amp; clears)</li>
-   <li>nodualobj - suppress generation of dual-object geometry shader code</li>
-   <li>optimizer - dump shader assembly to files at each optimization pass and iteration that make progress</li>
 </ul>
+<li>INTEL_SCALAR_VS (or TCS, TES, GS) - force scalar/vec4 mode for a shader stage (Gen8-9 only)</li>
+<li>INTEL_PRECISE_TRIG - if set to 1, true or yes, then the driver prefers
+   accuracy over performance in trig functions.</li>
 </ul>
 
 
@@ -179,6 +234,18 @@ Mesa EGL supports different sets of environment variables.  See the
 <li>GALLIUM_HUD - 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.
+<li>GALLIUM_HUD_PERIOD - sets the hud update rate in seconds (float). Use zero
+    to update every frame. The default period is 1/2 second.
+<li>GALLIUM_HUD_VISIBLE - control default visibility, defaults to true.
+<li>GALLIUM_HUD_TOGGLE_SIGNAL - 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 <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=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.
 <li>GALLIUM_PRINT_OPTIONS - if non-zero, print all the Gallium environment
@@ -195,6 +262,21 @@ Setting to "tgsi", for example, will print all the TGSI shaders.
 See src/mesa/state_tracker/st_debug.c for other options.
 </ul>
 
+<h3>Clover state tracker environment variables</h3>
+
+<ul>
+<li>CLOVER_EXTRA_BUILD_OPTIONS - allows specifying additional compiler and linker
+    options. Specified options are appended after the options set by the OpenCL
+    program in clBuildProgram.
+<li>CLOVER_EXTRA_COMPILE_OPTIONS - allows specifying additional compiler
+    options. Specified options are appended after the options set by the OpenCL
+    program in clCompileProgram.
+<li>CLOVER_EXTRA_LINK_OPTIONS - allows specifying additional linker
+    options. Specified options are appended after the options set by the OpenCL
+    program in clLinkProgram.
+</ul>
+
+
 <h3>Softpipe driver environment variables</h3>
 <ul>
 <li>SOFTPIPE_DUMP_FS - if set, the softpipe driver will print fragment shaders
@@ -215,7 +297,7 @@ See src/mesa/state_tracker/st_debug.c for other options.
 <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
+    Zero turns off threading completely.  The default value is the number of CPU
     cores present.
 </ul>
 
@@ -226,10 +308,37 @@ See src/mesa/state_tracker/st_debug.c for other options.
 (will often result in incorrect rendering).
 <li>SVGA_DEBUG - for dumping shaders, constant buffers, etc.  See the code
 for details.
+<li>SVGA_EXTRA_LOGGING - if set, enables extra logging to the vmware.log file,
+such as the OpenGL program's name and command line arguments.
 <li>See the driver code for other, lesser-used variables.
 </ul>
 
 
+<h3>VA-API state tracker environment variables</h3>
+<ul>
+<li>VAAPI_MPEG4_ENABLED - enable MPEG4 for VA-API, disabled by default.
+</ul>
+
+
+<h3>VC4 driver environment variables</h3>
+<ul>
+<li>VC4_DEBUG - a comma-separated list of named flags, which do various things:
+<ul>
+   <li>cl - dump command list during creation</li>
+   <li>qpu - dump generated QPU instructions</li>
+   <li>qir - dump QPU IR during program compile</li>
+   <li>nir - dump NIR during program compile</li>
+   <li>tgsi - dump TGSI during program compile</li>
+   <li>shaderdb - dump program compile information for shader-db analysis</li>
+   <li>perf - print during performance-related events</li>
+   <li>norast - skip actual hardware execution of commands</li>
+   <li>always_flush - flush after each draw call</li>
+   <li>always_sync - wait for finish after each flush</li>
+   <li>dump - write a GPU command stream trace file (VC4 simulator only)</li>
+</ul>
+</ul>
+
+
 <p>
 Other Gallium drivers have their own environment variables.  These may change
 frequently so the source code should be consulted for details.