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# Copyright 1999-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

inherit cmake desktop fcaps flag-o-matic

if [[ ${PV} == 9999 ]]; then
	inherit git-r3
	EGIT_REPO_URI="https://github.com/PCSX2/pcsx2.git"
else
	HASH_FASTFLOAT=32d21dcecb404514f94fb58660b8029a4673c2c1
	HASH_RCHEEVOS=31f8788fe0e694e99db7ce138d45a655c556fa96
	HASH_GLSLANG=c9706bdda0ac22b9856f1aa8261e5b9e15cd20c5
	HASH_VULKAN=9f4c61a31435a7a90a314fc68aeb386c92a09c0f
	SRC_URI="
		https://github.com/PCSX2/pcsx2/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz
		https://github.com/fastfloat/fast_float/archive/${HASH_FASTFLOAT}.tar.gz
			-> ${PN}-fast_float-${HASH_FASTFLOAT::10}.tar.gz
		https://github.com/RetroAchievements/rcheevos/archive/${HASH_RCHEEVOS}.tar.gz
			-> ${PN}-rcheevos-${HASH_RCHEEVOS::10}.tar.gz
		vulkan? (
			https://github.com/KhronosGroup/glslang/archive/${HASH_GLSLANG}.tar.gz
				-> ${PN}-glslang-${HASH_GLSLANG::10}.tar.gz
			https://github.com/KhronosGroup/Vulkan-Headers/archive/${HASH_VULKAN}.tar.gz
				-> ${PN}-vulkan-headers-${HASH_VULKAN::10}.tar.gz
		)"
	KEYWORDS="-* ~amd64"
fi

DESCRIPTION="PlayStation 2 emulator"
HOMEPAGE="https://pcsx2.net/"

LICENSE="
	GPL-3+ Apache-2.0 BSD BSD-2 BSD-4 Boost-1.0 CC0-1.0 GPL-2+
	ISC LGPL-2.1+ LGPL-3+ MIT OFL-1.1 ZLIB public-domain"
SLOT="0"
IUSE="alsa cpu_flags_x86_sse4_1 jack pulseaudio sndio test vulkan wayland"
REQUIRED_USE="cpu_flags_x86_sse4_1" # dies at runtime if no support
RESTRICT="!test? ( test )"

# dlopen: ffmpeg, qtsvg, vulkan-loader, wayland
RDEPEND="
	app-arch/xz-utils
	app-arch/zstd:=
	>=dev-cpp/rapidyaml-0.5:=
	dev-libs/libaio
	dev-libs/libchdr
	dev-libs/libfmt:=
	dev-libs/libzip:=[zstd]
	dev-qt/qtbase:6[gui,network,widgets]
	dev-qt/qtsvg:6
	media-libs/libglvnd
	media-libs/libpng:=
	>=media-libs/libsdl2-2.0.22[haptic,joystick]
	media-libs/libsoundtouch:=
	media-video/ffmpeg:=
	net-libs/libpcap
	net-misc/curl
	sys-libs/zlib:=
	virtual/libudev:=
	x11-libs/libXrandr
	alsa? ( media-libs/alsa-lib )
	jack? ( virtual/jack )
	pulseaudio? ( media-libs/libpulse )
	sndio? ( media-sound/sndio:= )
	vulkan? ( media-libs/vulkan-loader )
	wayland? ( dev-libs/wayland )"
DEPEND="
	${RDEPEND}
	x11-base/xorg-proto
	test? ( dev-cpp/gtest )"
BDEPEND="dev-qt/qttools[linguist]"

FILECAPS=(
	-m 0755 "CAP_NET_RAW+eip CAP_NET_ADMIN+eip" usr/bin/pcsx2
)

PATCHES=(
	"${FILESDIR}"/${PN}-1.7.3351-unbundle.patch
	"${FILESDIR}"/${PN}-1.7.3468-cubeb-automagic.patch
	"${FILESDIR}"/${PN}-1.7.3773-lto.patch
	"${FILESDIR}"/${PN}-1.7.3803-rapidyaml-0.5.0.patch
)

src_unpack() {
	if [[ ${PV} == 9999 ]]; then
		local EGIT_SUBMODULES=(
			# has no build system and is not really setup for unbundling
			3rdparty/rcheevos/rcheevos

			# system rapidyaml is still used, but this uses another part
			# of the source directly (fast_float) and so allow the submodule
			# https://github.com/PCSX2/pcsx2/commit/af646e449
			3rdparty/rapidyaml/rapidyaml
			3rdparty/rapidyaml/rapidyaml/extern/c4core
			3rdparty/rapidyaml/rapidyaml/ext/c4core/src/c4/ext/fast_float

			# glslang can be troublesome to unbundle (bug #831217),
			# also keep vulkan-headers to stay in sync
			$(usev vulkan '
				3rdparty/glslang/glslang
				3rdparty/vulkan-headers')
		)

		git-r3_src_unpack
	else
		default

		mkdir -p "${S}"/3rdparty/rapidyaml/rapidyaml/ext/c4core/src/c4/ext || die
		mv fast_float-${HASH_FASTFLOAT} \
			"${S}"/3rdparty/rapidyaml/rapidyaml/ext/c4core/src/c4/ext/fast_float || die

		rmdir "${S}"/3rdparty/rcheevos/rcheevos || die
		mv rcheevos-${HASH_RCHEEVOS} "${S}"/3rdparty/rcheevos/rcheevos || die

		if use vulkan; then
			rmdir "${S}"/3rdparty/{glslang/glslang,vulkan-headers} || die
			mv glslang-${HASH_GLSLANG} "${S}"/3rdparty/glslang/glslang || die
			mv Vulkan-Headers-${HASH_VULKAN} "${S}"/3rdparty/vulkan-headers || die
		fi
	fi
}

src_prepare() {
	cmake_src_prepare

	sed -e "/EmuFolders::AppRoot =/s|=.*|= \"${EPREFIX}/usr/share/${PN}\";|" \
		-i pcsx2/Frontend/CommonHost.cpp || die

	if [[ ${PV} != 9999 ]]; then
		sed -e '/set(PCSX2_GIT_TAG "")/s/""/"v'${PV}-gentoo'"/' \
			-i cmake/Pcsx2Utils.cmake || die

		# delete all 3rdparty/* except known-used ones in non-live
		local keep=(
			# TODO?: rapidjson and xbyak are packaged and could be unbundlable
			# w/ patch, and discord-rpc be optional w/ dependency on rapidjson
			cpuinfo cubeb demangler discord-rpc glad imgui include jpgd lzma
			rapidjson rapidyaml rcheevos simpleini xbyak zydis
			$(usev vulkan 'glslang vulkan-headers')
		)
		find 3rdparty -mindepth 1 -maxdepth 1 -type d \
			-not \( -false ${keep[*]/#/-o -name } \) -exec rm -r {} + || die
	fi
}

src_configure() {
	# for bundled glslang (bug #858374)
	use vulkan && append-flags -fno-strict-aliasing

	local mycmakeargs=(
		-DBUILD_SHARED_LIBS=no
		-DDISABLE_BUILD_DATE=yes
		-DENABLE_TESTS=$(usex test)
		-DUSE_VTUNE=no
		-DUSE_VULKAN=$(usex vulkan)
		-DWAYLAND_API=$(usex wayland)
		-DX11_API=yes # fails if X libs are missing even if disabled

		# note that the current upstream is somewhat hostile to using system
		# libs, system installs, or any modifications and may disregard any
		# bugs that is not reproducible with the appimage using bundled libs
		-DUSE_SYSTEM_LIBS=yes

		# sse4.1 is the bare minimum required, -m is required at build time
		# (see PCSX2Base.h) and it dies if no support at runtime (AppInit.cpp)
		# https://github.com/PCSX2/pcsx2/pull/4329
		-DARCH_FLAG=-msse4.1

		# bundled cubeb flags, see media-libs/cubeb and cubeb-automagic.patch
		-DCHECK_ALSA=$(usex alsa)
		-DCHECK_JACK=$(usex jack)
		-DCHECK_PULSE=$(usex pulseaudio)
		-DCHECK_SNDIO=$(usex sndio)
		-DLAZY_LOAD_LIBS=no
	)

	cmake_src_configure
}

src_test() {
	cmake_build unittests
}

src_install() {
	newbin "${BUILD_DIR}"/bin/pcsx2-qt ${PN}

	insinto /usr/share/${PN}
	doins -r "${BUILD_DIR}"/bin/resources

	dodoc README.md bin/docs/{Debugger.pdf,GameIndex.pdf,PCSX2_FAQ.pdf,debugger.txt}
	newman bin/docs/PCSX2.1 ${PN}.1

	newicon bin/resources/icons/AppIconLarge.png ${PN}.png
	make_desktop_entry ${PN} ${PN^^}
}

pkg_postinst() {
	fcaps_pkg_postinst

	local replacing=
	if [[ ${REPLACING_VERSIONS##* } ]]; then
		if ver_test ${REPLACING_VERSIONS##* } -lt 1.6.1; then
			replacing=old
		elif ver_test ${REPLACING_VERSIONS##* } -lt 1.7.3773; then
			replacing=wx
		else
			replacing=any
		fi
	fi

	if [[ ${replacing} == old ]]; then
		elog
		elog ">=${PN}-1.7 has received several changes since <=${PN}-1.6.0, notably"
		elog "it is now a 64bit build using Qt6. Just-in-case it is recommended to"
		elog "backup your configs, save states, and memory cards before use."
		elog "The executable was also renamed from 'PCSX2' to 'pcsx2'."
	fi

	if [[ ${replacing} == @(|old) && ${PV} != 9999 ]]; then
		elog
		elog "${PN}-1.7.x is a development branch where .x increments every changes."
		elog "Stable 1.6.0 is getting old and lacks many notable features (e.g. native"
		elog "64bit builds). Given it may be a long time before there is a new stable,"
		elog "Gentoo will carry and update 1.7.x roughly every months."
		elog
		elog "Please report an issue if feel a picked version needs to be updated ahead"
		elog "of time or masked (notably for handling regressions)."
	fi

	if [[ ${replacing} == wx ]]; then
		ewarn
		ewarn "Note that wxGTK support been dropped upstream since >=${PN}-1.7.3773,"
		ewarn "and so USE=qt6 is gone and Qt6 is now always used."
	fi
}