With this patch, I'm finally able to run programs that require OpenGL
3.0 when using a Nouveau powered GPU. Floating point textures are
disabled by default in Mesa due to patent concerns. I assume that
it's okay to include this in Guix because it's similar to how we
include lame despite MP3 being patent encumbered. Please correct me
if I'm wrong! ;)
- Dave
From 1a8de1631ec4d538bdb9caa8b623e8bb62a6c203 Mon Sep 17 00:00:00 2001
From: David Thompson <da...@gnu.org>
Date: Sat, 12 Nov 2016 17:59:16 -0500
Subject: [PATCH] gnu: mesa: Enable floating point textures.
* gnu/packages/gl.scm (mesa): Add --enable-texture-float to configure flags.
---
gnu/packages/gl.scm | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/gnu/packages/gl.scm b/gnu/packages/gl.scm
index 50b474c..a663b3b 100644
--- a/gnu/packages/gl.scm
+++ b/gnu/packages/gl.scm
@@ -5,6 +5,7 @@
;;; Copyright © 2014, 2015, 2016 Mark H Weaver <m...@netris.org>
;;; Copyright © 2016 ng0 <n...@we.make.ritual.n0.is>
;;; Copyright © 2016 Ricardo Wurmus <rek...@elephly.net>
+;;; Copyright © 2016 David Thompson <da...@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -257,6 +258,9 @@ also known as DXTn or DXTC) for Mesa.")
"--enable-gles2"
"--enable-gbm"
"--enable-shared-glapi"
+ ;; Without floating point texture support, drivers such as Nouveau
+ ;; are stuck at OpenGL 2.1 instead of OpenGL 3.0+.
+ "--enable-texture-float"
;; on non-intel systems, drop i915 and i965
;; from the default dri drivers
--
2.6.3
