From: Kenneth Graunke Date: Mon, 11 Sep 2017 22:47:55 +0000 (-0700) Subject: docs: Document shader capturing environment variables. X-Git-Url: https://git.libre-soc.org/?p=mesa.git;a=commitdiff_plain;h=e9cf458fa8c60878a17bee6a0f0b5b11f88272a4 docs: Document shader capturing environment variables. Reviewed-by: Tapani Pälli --- diff --git a/docs/envvars.html b/docs/envvars.html index 51c930f013f..17d69dc4cd4 100644 --- a/docs/envvars.html +++ b/docs/envvars.html @@ -133,6 +133,8 @@ that variable is set), or else within .cache/mesa within the user's home directory.
  • MESA_GLSL - shading language compiler options
  • MESA_NO_MINMAX_CACHE - when set, the minmax index cache is globally disabled. +
  • MESA_SHADER_CAPTURE_PATH - see Capturing Shaders
    • +
  • MESA_SHADER_DUMP_PATH and MESA_SHADER_READ_PATH - see Experimenting with Shader Replacements
    • diff --git a/docs/shading.html b/docs/shading.html index 8b4cfb36a1f..a0bbe997c1b 100644 --- a/docs/shading.html +++ b/docs/shading.html @@ -64,6 +64,7 @@ execution. These are generally used for debugging. Example: export MESA_GLSL=dump,nopt

    +

    Experimenting with Shader Replacements

    Shaders can be dumped and replaced on runtime for debugging purposes. This feature is not currently supported by SCons build. @@ -79,6 +80,20 @@ not clobber the replacement shaders. Also, the filenames of the replacement shad should match the filenames of the corresponding dumped shaders.

    +

    Capturing Shaders

    + +

    +Setting MESA_SHADER_CAPTURE_PATH to a directory will cause the compiler +to write .shader_test files for use with +shader-db, a tool +which compiler developers can use to gather statistics about shaders +(instructions, cycles, memory accesses, and so on). +

    +

    +Notably, this captures linked GLSL shaders - with all stages together - +as well as ARB programs. +

    +

    GLSL Version