From dae55242c07b7907fe37ff38346a7ea4affd01a3 Mon Sep 17 00:00:00 2001
From: Christoph Willing
Date: Tue, 23 Apr 2019 21:05:45 +1000
Subject: graphics/Blender: Add CUDA support

Signed-off-by: Christoph Willing <chris.willing@linux.com>
---
 graphics/Blender/Blender.SlackBuild | 13 ++++++++++++-
 graphics/Blender/README.Slackware   |  8 ++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/graphics/Blender/Blender.SlackBuild b/graphics/Blender/Blender.SlackBuild
index 7852440f49..972e3faaf2 100644
--- a/graphics/Blender/Blender.SlackBuild
+++ b/graphics/Blender/Blender.SlackBuild
@@ -26,7 +26,7 @@ SRCNAM=blender
 PKGNAM=Blender
 VERSION=${VERSION:-2.79b}
 BASE_VERSION=${BASE_VERSION:-$( echo $VERSION | sed -e 's/[^0-9.]*//g')}
-BUILD=${BUILD:-2}
+BUILD=${BUILD:-3}
 TAG=${TAG:-_SBo}
 PYTHON_VERSION=$(python3 -c "import sys; print(sys.version[:3])")
 
@@ -57,6 +57,16 @@ else
   LIBDIRSUFFIX=""
 fi
 
+cuda=""
+if [ -d /usr/include/cuda ]; then
+  # If cudatoolkit is installed, assume we want to use it
+  cuda="-DWITH_CYCLES_CUDA_BINARIES=ON"
+  # However disable cuda if requested by e.g. CUDA=no
+  if [ ${CUDA:-yes} != "yes" ]; then
+    cuda="-DWITH_CYCLES_CUDA_BINARIES=OFF"
+  fi
+fi
+
 set -e
 
 rm -rf $PKG
@@ -108,6 +118,7 @@ cd build
     -DWITH_SDL:BOOL=ON \
     -DWITH_SDL_DYNLOAD:BOOL=ON \
     -DCMAKE_BUILD_TYPE=Release \
+    $cuda \
 
   make
   make install DESTDIR=$PKG
diff --git a/graphics/Blender/README.Slackware b/graphics/Blender/README.Slackware
index 7eed585509..669253f6c7 100644
--- a/graphics/Blender/README.Slackware
+++ b/graphics/Blender/README.Slackware
@@ -58,6 +58,14 @@ If resources allow, the very large cudatoolkit package is another
 possible package which may be preinstalled and be utilised by the
 opencv build process.
 
+Blender itself can also use cudatoolkit to provide GPU rendering in
+systems with NVidia GPU cards. In this case, the SlackBuild will
+enable CUDA support if a cudatoolkit installation is detected at
+build time. In the unlikely CUDA support is not wanted despite cudatoolkit
+being available at build time, set the CUDA environment variable to "no"
+when running the SlackBuild e.g.
+    CUDA=no sh ./Blender.SlackBuild
+
     2. the ffmpeg package could/should first be built with additional
 features by preinstalling some other packages e.g.
 REQUIRES="lame x264
-- 
cgit v1.2.3