# Copyright 1999-2019 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/media-libs/mesa/mesa-7.9.ebuild,v 1.3 2010/12/05 17:19:14 arfrever Exp $

EAPI=7

EGIT_REPO_URI="git://anongit.freedesktop.org/mesa/mesa"
CROS_WORKON_PROJECT="chromiumos/third_party/mesa"
CROS_WORKON_MANUAL_UPREV="1"
CROS_WORKON_LOCALNAME="mesa"
CROS_WORKON_EGIT_BRANCH="upstream/main"

if [[ ${PV} = 9999* ]]; then
	GIT_ECLASS="git-2"
	EXPERIMENTAL="true"
fi

inherit multilib flag-o-matic meson toolchain-funcs ${GIT_ECLASS} cros-workon

FOLDER="${PV/_rc*/}"
[[ ${PV/_rc*/} == "${PV}" ]] || FOLDER+="/RC"

DESCRIPTION="OpenGL-like graphic library for Linux"
HOMEPAGE="http://mesa3d.sourceforge.net/"

# Most of the code is MIT/X11.
# ralloc is LGPL-3
# GLES[2]/gl[2]{,ext,platform}.h are SGI-B-2.0
LICENSE="MIT LGPL-3 SGI-B-2.0"
SLOT="0"
KEYWORDS="~*"

INTEL_CARDS="intel"
RADEON_CARDS="amdgpu radeon"
VIDEO_CARDS="${INTEL_CARDS} ${RADEON_CARDS} freedreno llvmpipe mach64 mga nouveau r128 radeonsi savage sis softpipe tdfx via virgl vmware"
for card in ${VIDEO_CARDS}; do
	IUSE_VIDEO_CARDS+=" video_cards_${card}"
done

IUSE="${IUSE_VIDEO_CARDS}
	debug dri drm egl +gallium -gbm gles1 gles2 kernel_FreeBSD
	kvm_guest llvm +nptl pic selinux shared-glapi vulkan wayland xlib-glx X
	libglvnd zstd"

LIBDRM_DEPSTRING=">=x11-libs/libdrm-2.4.60"

REQUIRED_USE="video_cards_amdgpu? ( llvm )
	video_cards_llvmpipe? ( llvm )"

# keep correct libdrm and dri2proto dep
# keep blocks in rdepend for binpkg
RDEPEND="
	libglvnd? ( media-libs/libglvnd )
	!libglvnd? ( !media-libs/libglvnd )
	X? (
		!<x11-base/xorg-server-1.7
		>=x11-libs/libX11-1.3.99.901
		x11-libs/libXdamage
		x11-libs/libXext
		x11-libs/libXrandr
		x11-libs/libXxf86vm
	)
	wayland? (
		dev-libs/wayland
		>=dev-libs/wayland-protocols-1.8
	)
	llvm? ( virtual/libelf )
	!media-libs/mesa
	dev-libs/expat
	zstd? ( app-arch/zstd )
	${LIBDRM_DEPSTRING}
"

# Pin to llvm-12 because llvmpipe does not support llvm-15 until 22.3
DEPEND="${RDEPEND}
	dev-libs/libxml2
	sys-devel/bison
	sys-devel/flex
	virtual/pkgconfig
	x11-base/xorg-proto
	llvm? ( sys-devel/llvm:12= )
"

driver_list() {
	local drivers="$(sort -u <<< "${1// /$'\n'}")"
	echo "${drivers//$'\n'/,}"
}

src_prepare() {
	# FreeBSD 6.* doesn't have posix_memalign().
	if [[ ${CHOST} == *-freebsd6.* ]]; then
		sed -i \
			-e "s/-DHAVE_POSIX_MEMALIGN//" \
			configure.ac || die
	fi

	# Produce a dummy git_sha1.h file because .git will not be copied to portage tmp directory
	echo '#define MESA_GIT_SHA1 "git-0000000"' > src/git_sha1.h
	default
}

src_configure() {
	tc-getPROG PKG_CONFIG pkg-config

	cros_optimize_package_for_speed
	# For llvmpipe on ARM we'll get errors about being unable to resolve
	# "__aeabi_unwind_cpp_pr1" if we don't include this flag; seems wise
	# to include it for all platforms though.
	use video_cards_llvmpipe && append-flags "-rtlib=libgcc -shared-libgcc --unwindlib=libgcc -lpthread"

	if use !gallium && use !vulkan; then
		ewarn "You enabled neither gallium, nor vulkan "
		ewarn "USE flags. No hardware drivers will be built."
	fi

	if use gallium; then
	# Configurable gallium drivers
		gallium_enable video_cards_llvmpipe swrast
		gallium_enable video_cards_softpipe swrast

		# Nouveau code
		gallium_enable video_cards_nouveau nouveau

		# ATI code
		gallium_enable video_cards_radeon r300 r600
		gallium_enable video_cards_amdgpu radeonsi

		# Freedreno code
		gallium_enable video_cards_freedreno freedreno

		gallium_enable video_cards_virgl virgl
	fi

	if use vulkan; then
		vulkan_enable video_cards_llvmpipe swrast
		vulkan_enable video_cards_intel intel
		vulkan_enable video_cards_amdgpu amd
	fi

	LLVM_ENABLE=false
	if use llvm && use !video_cards_softpipe; then
		emesonargs+=( -Dshared-llvm=disabled )
		export LLVM_CONFIG=${SYSROOT}/usr/lib/llvm/bin/llvm-config-host
		LLVM_ENABLE=true
	fi

	local egl_platforms=""
	if use egl; then
		if use wayland; then
			egl_platforms="${egl_platforms},wayland"
		fi

		if use X; then
			egl_platforms="${egl_platforms},x11"
		fi
	fi
	egl_platforms="${egl_platforms##,}"

	if use X; then
		glx="dri"
	else
		glx="disabled"
	fi

	append-flags "-UENABLE_SHADER_CACHE"

	if use kvm_guest; then
		emesonargs+=( -Ddri-search-path=/opt/google/cros-containers/lib )
	fi

	emesonargs+=(
		-Dexecmem=false
		-Dglvnd="$(usex libglvnd true false)"
		-Dglx="${glx}"
		-Dllvm="${LLVM_ENABLE}"
		-Dplatforms="${egl_platforms}"
		-Degl-native-platform="surfaceless"
		$(meson_feature egl)
		$(meson_feature gbm)
		$(meson_feature gles1)
		$(meson_feature gles2)
		$(meson_feature zstd)
		$(meson_use selinux)
		-Dgallium-drivers=$(driver_list "${GALLIUM_DRIVERS[*]}")
		-Dvulkan-drivers=$(driver_list "${VULKAN_DRIVERS[*]}")
		--buildtype $(usex debug debug release)
	)

	meson_src_configure
}

src_install() {
	meson_src_install

	# Remove redundant GLES headers
	rm -f "${D}"/usr/include/{EGL,GLES2,GLES3,KHR}/*.h || die "Removing GLES headers failed."

	dodir "/usr/$(get_libdir)/dri"
	insinto "/usr/$(get_libdir)/dri/"
	insopts -m0755
	# install the gallium drivers we use
	local gallium_drivers_files=( nouveau_dri.so r300_dri.so r600_dri.so msm_dri.so swrast_dri.so )
	for x in "${gallium_drivers_files[@]}"; do
		if [ -f "${S}/$(get_libdir)/gallium/${x}" ]; then
			doins "${S}/$(get_libdir)/gallium/${x}"
		fi
	done
}

gallium_enable() {
	if [[ $1 == -- ]] || use "$1"; then
		shift
		GALLIUM_DRIVERS+=("$@")
	fi
}

vulkan_enable() {
	if [[ $1 == -- ]] || use "$1"; then
		shift
		VULKAN_DRIVERS+=("$@")
	fi
}