# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

PYTHON_COMPAT=( python3_{7,8} )

inherit check-reqs cmake flag-o-matic pax-utils python-single-r1 toolchain-funcs xdg-utils

DESCRIPTION="3D Creation/Animation/Publishing System"
HOMEPAGE="https://www.blender.org"

if [[ ${PV} = *9999* ]] ; then
	inherit git-r3
	EGIT_REPO_URI="https://git.blender.org/blender.git"
else
	SRC_URI="https://download.blender.org/source/${P}.tar.xz"
	TEST_TARBALL_VERSION=2.83.1
	SRC_URI+=" test? ( https://dev.gentoo.org/~sam/distfiles/${CATEGORY}/${PN}/${PN}-${TEST_TARBALL_VERSION}-tests.tar.bz2 )"
	KEYWORDS="~amd64 ~x86"
fi

SLOT="${PV%.*}"
LICENSE="|| ( GPL-3 BL )"
IUSE="+bullet +dds +fluid +openexr +system-python +system-numpy +tbb \
	alembic collada +color-management cuda cycles \
	debug doc ffmpeg fftw headless jack jemalloc jpeg2k \
	man ndof nls openal opencl openimageio openmp opensubdiv \
	openvdb osl sdl sndfile standalone test tiff valgrind"
RESTRICT="!test? ( test )"

REQUIRED_USE="${PYTHON_REQUIRED_USE}
	alembic? ( openexr )
	cuda? ( cycles )
	cycles? ( openexr tiff openimageio )
	fluid? ( tbb )
	opencl? ( cycles )
	openvdb? ( tbb )
	osl? ( cycles )
	standalone? ( cycles )
	test? ( color-management osl )"

# Library versions for official builds can be found in the blender source directory in:
# build_files/build_environment/install_deps.sh
RDEPEND="${PYTHON_DEPS}
	dev-libs/boost:=[nls?,threads(+)]
	dev-libs/lzo:2=
	$(python_gen_cond_dep '
		dev-python/numpy[${PYTHON_USEDEP}]
		dev-python/requests[${PYTHON_USEDEP}]
	')
	media-libs/freetype:=
	media-libs/glew:*
	media-libs/libpng:=
	media-libs/libsamplerate
	sys-libs/zlib:=
	virtual/glu
	virtual/jpeg
	virtual/libintl
	virtual/opengl
	alembic? ( >=media-gfx/alembic-1.7.12[boost(+),hdf(+)] )
	collada? ( >=media-libs/opencollada-1.6.68 )
	color-management? ( <media-libs/opencolorio-2.0.0 )
	cuda? ( dev-util/nvidia-cuda-toolkit:= )
	ffmpeg? ( media-video/ffmpeg:=[x264,mp3,encode,theora,jpeg2k,vpx,vorbis,opus,xvid] )
	fftw? ( sci-libs/fftw:3.0= )
	!headless? (
		x11-libs/libX11
		x11-libs/libXi
		x11-libs/libXxf86vm
	)
	jack? ( virtual/jack )
	jemalloc? ( dev-libs/jemalloc:= )
	jpeg2k? ( media-libs/openjpeg:2= )
	ndof? (
		app-misc/spacenavd
		dev-libs/libspnav
	)
	nls? ( virtual/libiconv )
	openal? ( media-libs/openal )
	opencl? ( virtual/opencl )
	openimageio? ( >=media-libs/openimageio-2.2.13.1:= )
	openexr? (
		media-libs/ilmbase:=
		media-libs/openexr:=
	)
	opensubdiv? ( >=media-libs/opensubdiv-3.4.0[cuda=,opencl=] )
	openvdb? (
		>=media-gfx/openvdb-7.0.0
		dev-libs/c-blosc:=
	)
	osl? ( <media-libs/osl-1.11.0 )
	sdl? ( media-libs/libsdl2[sound,joystick] )
	sndfile? ( media-libs/libsndfile )
	tbb? ( <dev-cpp/tbb-2021.4.0:= )
	tiff? ( media-libs/tiff )
	valgrind? ( dev-util/valgrind )
"

DEPEND="${RDEPEND}
	dev-cpp/eigen:=
"

BDEPEND="
	virtual/pkgconfig
	doc? (
		app-doc/doxygen[dot]
		dev-python/sphinx[latex]
		dev-texlive/texlive-bibtexextra
		dev-texlive/texlive-fontsextra
		dev-texlive/texlive-fontutils
		dev-texlive/texlive-latex
		dev-texlive/texlive-latexextra
	)
	nls? ( sys-devel/gettext )
"

PATCHES=(
	"${FILESDIR}/blender-2.83.6-libmv_eigen_alignment.patch"
	"${FILESDIR}/blender-2.83.6-constraints_test.patch"
	"${FILESDIR}/blender-2.83.6-fix_opevdb_abi.patch"
	"${FILESDIR}/blender-2.83.13-ffmpeg-4_4.patch"
)

blender_check_requirements() {
	[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp

	if use doc; then
		CHECKREQS_DISK_BUILD="4G" check-reqs_pkg_pretend
	fi
}

blender_get_version() {
	# Get blender version from blender itself.
	BV=$(grep "BLENDER_VERSION " source/blender/blenkernel/BKE_blender_version.h | cut -d " " -f 3; assert)
	# Add period.
	BV=${BV:0:1}.${BV:1}
}

pkg_pretend() {
	blender_check_requirements
}

pkg_setup() {
	blender_check_requirements
	python-single-r1_pkg_setup
}

src_unpack() {
	if [[ ${PV} = *9999* ]] ; then
		git-r3_src_unpack
	else
		default
	fi

	if use test; then
		mkdir -p lib || die
		mv "${WORKDIR}"/blender-${TEST_TARBALL_VERSION}-tests/tests lib || die
	fi
}

src_prepare() {
	cmake_src_prepare

	blender_get_version

	# Disable MS Windows help generation. The variable doesn't do what it
	# it sounds like.
	sed -e "s|GENERATE_HTMLHELP      = YES|GENERATE_HTMLHELP      = NO|" \
		-i doc/doxygen/Doxyfile || die

	# Prepare icons and .desktop files for slotting.
	sed -e "s|blender.svg|blender-${BV}.svg|" -i source/creator/CMakeLists.txt || die
	sed -e "s|blender-symbolic.svg|blender-${BV}-symbolic.svg|" -i source/creator/CMakeLists.txt || die
	sed -e "s|blender.desktop|blender-${BV}.desktop|" -i source/creator/CMakeLists.txt || die
	sed -e "s|blender-thumbnailer.py|blender-${BV}-thumbnailer.py|" -i source/creator/CMakeLists.txt || die

	sed -e "s|Name=Blender|Name=Blender ${PV}|" -i release/freedesktop/blender.desktop || die
	sed -e "s|Exec=blender|Exec=blender-${BV}|" -i release/freedesktop/blender.desktop || die
	sed -e "s|Icon=blender|Icon=blender-${BV}|" -i release/freedesktop/blender.desktop || die

	mv release/freedesktop/icons/scalable/apps/blender.svg release/freedesktop/icons/scalable/apps/blender-${BV}.svg || die
	mv release/freedesktop/icons/symbolic/apps/blender-symbolic.svg release/freedesktop/icons/symbolic/apps/blender-${BV}-symbolic.svg || die
	mv release/freedesktop/blender.desktop release/freedesktop/blender-${BV}.desktop || die
	mv release/bin/blender-thumbnailer.py release/bin/blender-${BV}-thumbnailer.py || die

	if use test; then
		# Without this the tests will try to use /usr/bin/blender and /usr/share/blender/ to run the tests.
		sed -e "s|string(REPLACE.*|set(TEST_INSTALL_DIR ${ED}/usr/)|g" -i tests/CMakeLists.txt || die
		sed -e "s|string(REPLACE.*|set(TEST_INSTALL_DIR ${ED}/usr/)|g" -i build_files/cmake/Modules/GTestTesting.cmake || die
	fi
}

src_configure() {
	# Without this the floating point math will differ when for example
	# "-march=native" is set. This will make automated tests fail and we will
	# not match the behaviour of some operators/modifiers with the official
	# builds.
	append-flags -ffp-contract=off
	append-lfs-flags

	local mycmakeargs=(
		-DBUILD_SHARED_LIBS=OFF
		-DPYTHON_INCLUDE_DIR="$(python_get_includedir)"
		-DPYTHON_LIBRARY="$(python_get_library_path)"
		-DPYTHON_VERSION="${EPYTHON/python/}"
		-DWITH_ALEMBIC=$(usex alembic)
		-DWITH_ASSERT_ABORT=$(usex debug)
		-DWITH_BOOST=ON
		-DWITH_BULLET=$(usex bullet)
		-DWITH_CODEC_FFMPEG=$(usex ffmpeg)
		-DWITH_CODEC_SNDFILE=$(usex sndfile)
		-DWITH_CXX_GUARDEDALLOC=$(usex debug)
		-DWITH_CYCLES_DEVICE_CUDA=$(usex cuda TRUE FALSE)
		-DWITH_CYCLES=$(usex cycles)
		-DWITH_CYCLES_DEVICE_OPENCL=$(usex opencl)
		-DWITH_CYCLES_STANDALONE=$(usex standalone)
		-DWITH_CYCLES_STANDALONE_GUI=$(usex standalone)
		-DWITH_CYCLES_OSL=$(usex osl)
		-DWITH_DOC_MANPAGE=$(usex man)
		-DWITH_FFTW3=$(usex fftw)
		-DWITH_GTESTS=$(usex test)
		-DWITH_HEADLESS=$(usex headless)
		-DWITH_INSTALL_PORTABLE=OFF
		-DWITH_IMAGE_DDS=$(usex dds)
		-DWITH_IMAGE_OPENEXR=$(usex openexr)
		-DWITH_IMAGE_OPENJPEG=$(usex jpeg2k)
		-DWITH_IMAGE_TIFF=$(usex tiff)
		-DWITH_INPUT_NDOF=$(usex ndof)
		-DWITH_INTERNATIONAL=$(usex nls)
		-DWITH_JACK=$(usex jack)
		-DWITH_MEM_JEMALLOC=$(usex jemalloc)
		-DWITH_MEM_VALGRIND=$(usex valgrind)
		-DWITH_MOD_FLUID=$(usex fluid)
		-DWITH_MOD_OCEANSIM=$(usex fftw)
		-DWITH_OPENAL=$(usex openal)
		-DWITH_OPENCOLLADA=$(usex collada)
		-DWITH_OPENCOLORIO=$(usex color-management)
		-DWITH_OPENIMAGEIO=$(usex openimageio)
		-DWITH_OPENMP=$(usex openmp)
		-DWITH_OPENSUBDIV=$(usex opensubdiv)
		-DWITH_OPENVDB=$(usex openvdb)
		-DWITH_OPENVDB_BLOSC=$(usex openvdb)
		-DWITH_PYTHON_INSTALL=$(usex system-python OFF ON)
		-DWITH_PYTHON_INSTALL_NUMPY=$(usex system-numpy OFF ON)
		-DWITH_SDL=$(usex sdl)
		-DWITH_STATIC_LIBS=OFF
		-DWITH_SYSTEM_EIGEN3=ON
		-DWITH_SYSTEM_GLEW=ON
		-DWITH_SYSTEM_LZO=ON
		-DWITH_TBB=$(usex tbb)
		-DWITH_USD=OFF
	)
	if ! use debug ; then
		append-flags  -DNDEBUG
	else
		append-flags  -DDEBUG
	fi
	cmake_src_configure
}

src_compile() {
	cmake_src_compile

	if use doc; then
		# Workaround for binary drivers.
		addpredict /dev/ati
		addpredict /dev/dri
		addpredict /dev/nvidiactl

		einfo "Generating Blender C/C++ API docs ..."
		cd "${CMAKE_USE_DIR}"/doc/doxygen || die
		doxygen -u Doxyfile || die
		doxygen || die "doxygen failed to build API docs."

		cd "${CMAKE_USE_DIR}" || die
		einfo "Generating (BPY) Blender Python API docs ..."
		"${BUILD_DIR}"/bin/blender --background --python doc/python_api/sphinx_doc_gen.py -noaudio || die "sphinx failed."

		cd "${CMAKE_USE_DIR}"/doc/python_api || die
		sphinx-build sphinx-in BPY_API || die "sphinx failed."
	fi
}

src_test() {
	# A lot of tests needs to have access to the installed data files.
	# So install them into the image directory now.
	cmake_src_install

	blender_get_version
	# Define custom blender data/script file paths not be able to find them otherwise during testing.
	# (Because the data is in the image directory and it will default to look in /usr/share)
	export BLENDER_SYSTEM_SCRIPTS=${ED}/usr/share/blender/${BV}/scripts
	export BLENDER_SYSTEM_DATAFILES=${ED}/usr/share/blender/${BV}/datafiles

	# NOTE: The 'modifiers' test will fail if opensubdiv was compiled with -march=native
	# This this is fixed in blender version 2.92 and up."
	cmake_src_test

	# Clean up the image directory for src_install
	rm -fr ${ED}/* || die
}

src_install() {
	blender_get_version

	# Pax mark blender for hardened support.
	pax-mark m "${BUILD_DIR}"/bin/blender

	if use standalone; then
		dobin "${BUILD_DIR}"/bin/cycles
	fi

	if use doc; then
		docinto "html/API/python"
		dodoc -r "${CMAKE_USE_DIR}"/doc/python_api/BPY_API/.

		docinto "html/API/blender"
		dodoc -r "${CMAKE_USE_DIR}"/doc/doxygen/html/.
	fi

	cmake_src_install

	if use man; then
		# Slot the man page
		mv "${ED}/usr/share/man/man1/blender.1" "${ED}/usr/share/man/man1/blender-${BV}.1" || die
	fi

	# Fix doc installdir
	docinto html
	dodoc "${CMAKE_USE_DIR}"/release/text/readme.html
	rm -r "${ED}"/usr/share/doc/blender || die

	python_fix_shebang "${ED}/usr/bin/blender-${BV}-thumbnailer.py"
	python_optimize "${ED}/usr/share/blender/${BV}/scripts"

	mv "${ED}/usr/bin/blender" "${ED}/usr/bin/blender-${BV}" || die
}

pkg_postinst() {
	elog
	elog "Blender uses python integration. As such, may have some"
	elog "inherent risks with running unknown python scripts."
	elog
	elog "It is recommended to change your blender temp directory"
	elog "from /tmp to /home/user/tmp or another tmp file under your"
	elog "home directory. This can be done by starting blender, then"
	elog "changing the 'Temporary Files' directory in Blender preferences."
	elog
	ewarn
	ewarn "This ebuild does not unbundle the massive amount of 3rd party"
	ewarn "libraries which are shipped with blender. Note that"
	ewarn "these have caused security issues in the past."
	ewarn "If you are concerned about security, file a bug upstream:"
	ewarn "  https://developer.blender.org/"
	ewarn

	elog "You are building Blender with a newer python version than"
	elog "supported by this version upstream."
	elog "If you experience breakages with e.g. plugins, please download"
	elog "the official Blender LTS binary release instead."
	elog "Bug: https://bugs.gentoo.org/737388"
	elog

	xdg_icon_cache_update
	xdg_mimeinfo_database_update
	xdg_desktop_database_update
}

pkg_postrm() {
	xdg_icon_cache_update
	xdg_mimeinfo_database_update
	xdg_desktop_database_update

	ewarn ""
	ewarn "You may want to remove the following directory."
	ewarn "~/.config/${PN}/${SLOT}/cache/"
	ewarn "It may contain extra render kernels not tracked by portage"
	ewarn ""
}