[Mesa-dev] [PATCH 3/3] travis: add the possibility of using the txc-dxtn library

[Andres Gomez]

The txc-dxtn library implements the patented S3 Texture Compression
algorithm.

By default it won't be used but we add the possibility of setting the
USE_TXC_DXTN variable to yes in the travis web UI so it will be
installed and used for the scons tests.

Signed-off-by: Andres Gomez <agomez at igalia.com>
Cc: Eric Anholt <eric at anholt.net>
Cc: Emil Velikov <emil.l.velikov at gmail.com>
Cc: Rhys Kidd <rhyskidd at gmail.com>
---
 .travis.yml | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 3c51c06a73..7a4af863dd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,6 +25,7 @@ env:
   global:
     - XORG_RELEASES=http://xorg.freedesktop.org/releases/individual
     - XCB_RELEASES=http://xcb.freedesktop.org/dist
+    - TXC_DXTN_RELEASES=https://people.freedesktop.org/~cbrill/libtxc_dxtn
     - XORGMACROS_VERSION=util-macros-1.19.0
     - GLPROTO_VERSION=glproto-1.4.17
     - DRI2PROTO_VERSION=dri2proto-2.8
@@ -35,6 +36,7 @@ env:
     - XCBPROTO_VERSION=xcb-proto-1.11
     - LIBXCB_VERSION=libxcb-1.11
     - LIBXSHMFENCE_VERSION=libxshmfence-1.2
+    - TXC_DXTN_VERSION=libtxc_dxtn-1.0.1
     - LLVM_VERSION=3.9
     - LLVM_CONFIG="llvm-config-${LLVM_VERSION}"
     - PKG_CONFIG_PATH=$HOME/prefix/lib/pkgconfig
@@ -103,6 +105,20 @@ install:
   # libtxc-dxtn-s2tc0 will make scons check fail so we remove it ...
   - sudo apt-get purge libtxc-dxtn-s2tc0
 
+  # libtxc-dxtn uses the patented S3 Texture Compression
+  # algorithm. Therefore, we don't want to use this library but it is
+  # still possible through setting the USE_TXC_DXTN variable to yes in
+  # the travis web UI.
+  #
+  # According to Wikipedia, the patent expires on October 2, 2017:
+  # https://en.wikipedia.org/wiki/S3_Texture_Compression#Patent
+  - if test "x$USE_TXC_DXTN" = xyes; then
+      wget $TXC_DXTN_RELEASES/$TXC_DXTN_VERSION.tar.bz2;
+      tar -jxvf $TXC_DXTN_VERSION.tar.bz2;
+      (cd $TXC_DXTN_VERSION && ./configure --prefix=$HOME/prefix && make install);
+      export LD_LIBRARY_PATH=$HOME/prefix/lib;
+    fi
+
 script:
   - if test "x$BUILD" = xmake; then
       ./autogen.sh --enable-debug
-- 
2.11.0