dxvk-9999.ebuild

# Copyright 2022 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

MULTILIB_COMPAT=( abi_x86_{32,64} )
inherit flag-o-matic meson-multilib

if [[ ${PV} == 9999 ]]; then
	inherit git-r3
	EGIT_REPO_URI="https://github.com/doitsujin/dxvk.git"
else
	SRC_URI="https://github.com/doitsujin/dxvk/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
	KEYWORDS="-* ~amd64 ~x86"
fi

DESCRIPTION="Vulkan-based implementation of D3D9, D3D10 and D3D11 for Linux / Wine"
HOMEPAGE="https://github.com/doitsujin/dxvk/"

LICENSE="ZLIB"
SLOT="0"
IUSE="+abi_x86_32 crossdev-mingw +d3d9 +d3d10 +d3d11 debug +dxgi tests"
REQUIRED_USE="
	|| ( d3d9 d3d10 d3d11 dxgi tests )
	d3d10? ( d3d11 )
	dxgi? ( d3d11 )"

BDEPEND="
	dev-util/glslang
	!crossdev-mingw? ( dev-util/mingw64-toolchain[${MULTILIB_USEDEP}] )"
# note: multilib belongs in BDEPEND due to using cross libraries from BROOT

pkg_pretend() {
	if use crossdev-mingw && [[ ${MERGE_TYPE} != binary ]]; then
		local mingw_gcc=$(usex x86 i686 x86_64)-w64-mingw32-gcc
		if ! type -P ${mingw_gcc} >/dev/null; then
			eerror "With USE=crossdev-mingw, it is necessary to setup the mingw toolchain."
			eerror "For instructions, please see: https://wiki.gentoo.org/wiki/Mingw"
			die "USE=crossdev-mingw is set but ${mingw_gcc} was not found"
		elif use amd64 && use abi_x86_32 &&
			! type -P i686-w64-mingw32-gcc >/dev/null; then
			die 'USE="abi_x86_32 crossdev-mingw" is set but i686-w64-mingw32-gcc was not found'
		elif [[ ! $(LC_ALL=C ${mingw_gcc} -v 2>&1) =~ "Thread model: posix" ]]; then
			eerror "${PN} requires GCC to be built with --enable-threads=posix"
			eerror "Please see: https://wiki.gentoo.org/wiki/Mingw#POSIX_threads_for_Windows"
			die "USE=crossdev-mingw is set but ${mingw_gcc} does not use POSIX threads"
		fi
	fi
}

src_prepare() {
	default

	sed -i "/^basedir=/s|=.*|=${EPREFIX}/usr/lib/dxvk|" setup_dxvk.sh || die

	use crossdev-mingw || PATH=${BROOT}/usr/lib/mingw64-toolchain/bin:${PATH}

	# AVX has a history of causing issues with this package, disable for safety
	# https://github.com/Tk-Glitch/PKGBUILDS/issues/515
	append-flags -mno-avx

	if [[ ${CHOST} != *-mingw* ]]; then
		unset AR CC CXX RC STRIP # likely unusable unless CHOST is mingw
		CHOST_amd64=x86_64-w64-mingw32
		CHOST_x86=i686-w64-mingw32
		CHOST=$(usex x86 ${CHOST_x86} ${CHOST_amd64})
		strip-unsupported-flags
	fi
}

multilib_src_configure() {
	# multilib's ${CHOST_amd64}-gcc -m32 is unusable with crossdev,
	# unset again so meson eclass will set ${CHOST}-gcc + others
	use crossdev-mingw && unset AR CC CXX RC STRIP

	local emesonargs=(
		--prefix="${EPREFIX}"/usr/lib/dxvk
		--{bin,lib}dir=x$((${ABI#x}==86?32:64))

		$(meson_use {,enable_}d3d9)
		$(meson_use {,enable_}d3d10)
		$(meson_use {,enable_}d3d11)
		$(meson_use {,enable_}dxgi)

		# tests need wine, working vulkan, and some would hang, but can
		# still install for whomever wants to test if dxvk is working
		$(meson_use {,enable_}tests)

		# portage won't strip .dll and it's ~150MB -> 22MB
		$(usev !debug --strip)
	)

	meson_src_configure
}

multilib_src_install_all() {
	dobin setup_dxvk.sh
	dodoc README.md dxvk.conf

	find "${ED}" -type f -name '*.a' -delete || die
}

pkg_postinst() {
	if [[ ! ${REPLACING_VERSIONS} ]]; then
		elog "To enable dxvk on a wine prefix, can run the following command:"
		elog "	WINEPREFIX=/path/to/prefix setup_dxvk.sh install --symlink"
		elog "See ${EROOT}/usr/share/doc/${PF}/README.md* for details."
	fi

	# don't keep wine-*[vulkan] in RDEPEND to keep freedom of what will be used
	# with (e.g. custom wine or even copy to real Windows), but give a warning
	local wine
	for wine in app-emulation/wine-{vanilla,staging}; do
		has_version ${wine} && ! has_version ${wine}[vulkan] &&
			ewarn "${wine} was not built with USE=vulkan, ${PN} will not be usable with it"
	done
}