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Mesa config file documentation
As of Mesa 3.1 beta 2, a config file can be used to configure various
Mesa parameters. For example, extensions can be enable/disabled,
glHints can be specified, etc. More config options will be added
in the future.
The config file uses a Lisp-like syntax.
Here's Keith's description of the file with a few examples.
;; -*-lisp-*-
;;
;; KW: New mesa configuration file, syntax following a lisp style.
;;
;; valid syntax:
;;
;; (config-mesa version configs)
;;
;; where:
;; version - is the version number of mesa for which the configuration
;; was written. Future versions will use this to check for upwards
;; compatibility. There is however no guarentee that old configurations
;; will continue to be respected.
;;
;; configs - is a list of valid configuration lists, as specified by:
;;
;; (default-hint variable value)
;; (disable-extension name)
;; (fx-catch-signals {true|false})
;;
;; Mesa will look for an environment variable MESA_CONFIG, and try to
;; execute that profile. Otherwise, it will fallback to the profile
;; with the same name as the current mesa version. As default
;; profiles should normally be empty or near-empty, this should be
;; sufficiently powerful.
;;
;; Guareenteed to be an empty config.
;;
(config-mesa empty ())
;; Default profile - should normally be an empty list of
;; configurations.
;;
(config-mesa mesa3.1beta1 ())
(config-mesa no-cva ((disable-extension GL_EXT_compiled_vertex_array)))
;; Turn off some compliance for the sake of speed.
;;
(config-mesa quake2
(
;; Quake2 likes this extension, but it really hurts performance if
;; you don't also disable software fallbacks, below. (And do
;; something else to stop the eye-space calculations too...)
;;
(disable-extension GL_EXT_point_parameters)
;; These hints are honoured only by the 3dfx driver - the X driver
;; continues to function even if you specify hardware-only
;; rendering.
;;
;(default-hint GL_ALLOW_DRAW_OBJ_HINT_PGI GL_TRUE) ; wishful thinking
;(default-hint GL_ALLOW_DRAW_WIN_HINT_PGI GL_TRUE) ; allow 3dfx
hardware...
;(default-hint GL_ALLOW_DRAW_SPN_HINT_PGI GL_FALSE) ; no software spans
;(default-hint GL_ALLOW_DRAW_MEM_HINT_PGI GL_FALSE) ; no softare pixels
;; Lock in the hints specified above.
;;
(disable-extension GL_PGI_misc_hints)))
;; Turn off some compliance for the sake of speed.
;;
(config-mesa quake2b
(
;; Quake2 likes this extension, but it really hurts performance if
;; you don't also disable software fallbacks, below. (And do
;; something else to stop the eye-space calculations too...)
;;
;(disable-extension GL_EXT_point_parameters)
;; These hints are honoured only by the 3dfx driver - the X driver
;; continues to function even if you specify hardware-only
;; rendering.
;;
(default-hint GL_ALLOW_DRAW_OBJ_HINT_PGI GL_TRUE) ; wishful thinking
(default-hint GL_ALLOW_DRAW_WIN_HINT_PGI GL_TRUE) ; allow 3dfx
hardware...
(default-hint GL_ALLOW_DRAW_SPN_HINT_PGI GL_FALSE) ; no software spans
(default-hint GL_ALLOW_DRAW_MEM_HINT_PGI GL_FALSE) ; no softare pixels
;; Lock in the hints specified above.
;;
(disable-extension GL_PGI_misc_hints)))
;; Just some reminders for me.
;;
(config-mesa todo-list
(
;; Allows us to slot in simpler lighting routines - not
;; implemented.
;;
(default-hint GL_STRICT_POINT_DISTANCE_HINT_MESA GL_FALSE)
(default-hint GL_STRICT_LIGHTING_HINT_PGI GL_FALSE)))
----------------------------------------------------------------------
$Id: CONFIG,v 1.1 1999/04/22 02:17:29 brianp Exp $
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