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# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=7
inherit cmake flag-o-matic linux-info toolchain-funcs
DESCRIPTION="Collection of high-performance ray tracing kernels"
HOMEPAGE="https://github.com/embree/embree"
LICENSE="Apache-2.0"
KEYWORDS="~amd64 ~x86"
SRC_URI="https://github.com/embree/embree/archive/v${PV}.tar.gz -> ${P}.tar.gz"
SLOT="3"
X86_CPU_FLAGS=( sse2:sse2 sse4_2:sse4_2 avx:avx avx2:avx2 avx512dq:avx512dq )
CPU_FLAGS=( ${X86_CPU_FLAGS[@]/#/cpu_flags_x86_} )
IUSE="+compact-polys ispc +raymask ssp +tbb tutorial static-libs ${CPU_FLAGS[@]%:*}"
BDEPEND="
virtual/pkgconfig
"
RDEPEND="
ispc? ( dev-lang/ispc )
>=media-libs/glfw-3.2.1
tbb? ( dev-cpp/tbb )
tutorial? (
>=media-libs/libpng-1.6.34:0=
>=media-libs/openimageio-1.8.7
virtual/jpeg:0
)
virtual/opengl
"
DEPEND="${RDEPEND}"
RESTRICT="mirror"
DOCS=( CHANGELOG.md README.md readme.pdf )
pkg_setup() {
CONFIG_CHECK="~TRANSPARENT_HUGEPAGE"
WARNING_TRANSPARENT_HUGEPAGE="Not enabling Transparent Hugepages (CONFIG_TRANSPARENT_HUGEPAGE) will impact rendering performance."
linux-info_pkg_setup
if ! ( cat /proc/cpuinfo | grep sse2 > /dev/null ) ; then
die "You need a CPU with at least sse2 support"
fi
}
src_prepare() {
cmake_src_prepare
# disable RPM package building
sed -e 's|CPACK_RPM_PACKAGE_RELEASE 1|CPACK_RPM_PACKAGE_RELEASE 0|' \
-i CMakeLists.txt || die
}
src_configure() {
# NOTE: You can make embree accept custom CXXFLAGS by turning off
# EMBREE_IGNORE_CMAKE_CXX_FLAGS. However, the linking will fail if you use
# any "march" compile flags. This is because embree builds modules for the
# different supported ISAs and picks the correct one at runtime.
# "march" will pull in cpu instructions that shouldn't be in specific modules
# and it fails to link properly.
# https://github.com/embree/embree/issues/115
filter-flags -march=*
local mycmakeargs=(
-DBUILD_TESTING:BOOL=OFF
-DCMAKE_SKIP_INSTALL_RPATH:BOOL=ON
-DEMBREE_BACKFACE_CULLING=OFF # default
-DEMBREE_COMPACT_POLYS=$(usex compact-polys)
-DEMBREE_FILTER_FUNCTION=ON # default
-DEMBREE_GEOMETRY_CURVE=ON # default
-DEMBREE_GEOMETRY_GRID=ON # default
-DEMBREE_GEOMETRY_INSTANCE=ON # default
-DEMBREE_GEOMETRY_POINT=ON # default
-DEMBREE_GEOMETRY_QUAD=ON # default
-DEMBREE_GEOMETRY_SUBDIVISION=ON # default
-DEMBREE_GEOMETRY_TRIANGLE=ON # default
-DEMBREE_GEOMETRY_USER=ON # default
-DEMBREE_IGNORE_CMAKE_CXX_FLAGS=OFF
-DEMBREE_IGNORE_INVALID_RAYS=OFF # default
-DEMBREE_MAX_ISA:STRING="NONE" # Set to NONE so we can manually switch on ISAs below
-DEMBREE_ISA_AVX=$(usex cpu_flags_x86_avx)
-DEMBREE_ISA_AVX2=$(usex cpu_flags_x86_avx2)
-DEMBREE_ISA_AVX512=$(usex cpu_flags_x86_avx512dq)
-DEMBREE_ISA_SSE2=$(usex cpu_flags_x86_sse2)
-DEMBREE_ISA_SSE42=$(usex cpu_flags_x86_sse4_2)
-DEMBREE_ISPC_SUPPORT=$(usex ispc)
-DEMBREE_RAY_MASK=$(usex raymask)
-DEMBREE_RAY_PACKETS=ON # default
-DEMBREE_STACK_PROTECTOR=$(usex ssp)
-DEMBREE_STATIC_LIB=$(usex static-libs)
-DEMBREE_STAT_COUNTERS=OFF
-DEMBREE_TASKING_SYSTEM:STRING=$(usex tbb "TBB" "INTERNAL")
-DEMBREE_TUTORIALS=$(usex tutorial) )
# Disable asserts
append-flags -DNDEBUG
if use tutorial; then
mycmakeargs+=(
-DEMBREE_ISPC_ADDRESSING:STRING="64"
-DEMBREE_TUTORIALS_LIBJPEG=ON
-DEMBREE_TUTORIALS_LIBPNG=ON
-DEMBREE_TUTORIALS_OPENIMAGEIO=ON )
fi
cmake_src_configure
}
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