games-util/mangohud: new package

The imgui dependency that is bundled in GURU needs some work
before it can be used as a dependency, bundle it for now

Bug: https://bugs.gentoo.org/838850

Signed-off-by: Adel KARA SLIMANE <adel.ks@zegrapher.com>

games-util/mangohud/Manifest

@@ -0,0 +1,3 @@
+DIST imgui-1.81-1-meson-wrap.zip 1850 BLAKE2B 325f84fd57a896ec9aceb83a54752e8dba52499c3540cc389ab51b929f1dd65c4a599ab71f7f06fa082f31572d8cdaf2f9d7bfdd8cf6ca96a529318bd53f0a06 SHA512 c97fa4cb5ab31c040951e6da04bb1b9659f0105adf54becc35c60ad376c6d4f9e4dcd2a5a554dc5430cfc69527ef5d8570f39fbbf91a23d15f51740f06fb7c3c
+DIST imgui-1.81.tar.gz 1413443 BLAKE2B 6f2e63777821b2767da92d9f40f4de7b4313c38817413e959e612c0ce67701645cf29f0748a3b86cfbd41e0b4b2c8099e9a0ca786c637ca1661fffd7b0de0629 SHA512 d7a2b66dea77359f78068a595607d7668e09ddd0b91910f67fc6463cb920b91b0cc1855984bd4d41e6a880b69ca7cd5e3adc064dcf461c0629b9f8c845a4fc3e
+DIST mangohud-0.6.6.1.tar.gz 14839055 BLAKE2B e0e27e62bf688b80611461ecab1bf4cf2c39f8359a9dc2cc1362555bfca55db30a72684da4e07e03970d8e5dee1d26f1d7a1fa30ff47aa86ec653dba273f24cf SHA512 c097dede7e534641f12a9c7f0a2ce049611e17732c7d232251b38d5c50bbcee53b2b22e548ff27f514fa57a45c563d883a1a9382c2c0ee9ac6832a2775e8f221

games-util/mangohud/files/mangonhud-0.6.6-meson-build.patch

@@ -0,0 +1,14 @@
+# We provide media-libs/imgui in guru
+
+--- a/meson.build
++++ b/meson.build
+@@ -251,8 +251,7 @@ elif sizeof_ptr == 4
+   pre_args += '-DMANGOHUD_ARCH="32bit"'
+ endif
+
+-dearimgui_sp = subproject('imgui', default_options: imgui_options)
+-dearimgui_dep = dearimgui_sp.get_variable('imgui_dep')
++dearimgui_dep = dependency('imgui', default_options: imgui_options, fallback : ['imgui', 'imgui_dep'])
+
+ spdlog_dep = cpp.find_library('spdlog', required: get_option('use_system_spdlog'))
+ if not spdlog_dep.found()

games-util/mangohud/mangohud-0.6.6.1.ebuild

@@ -0,0 +1,94 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{8..10} )
+
+inherit distutils-r1 meson-multilib
+
+MY_PV=$(ver_cut 1-3)
+[ -n "$(ver_cut 4)" ] && MY_PV_REV="-$(ver_cut 4)"
+
+IMGUI_VER="1.81"
+IMGUI_MESON_WRAP_VER="1"
+
+DESCRIPTION="A Vulkan and OpenGL overlay for monitoring FPS, temperatures, CPU/GPU load and more."
+HOMEPAGE="https://github.com/flightlessmango/MangoHud"
+
+SRC_URI="
+	https://github.com/flightlessmango/MangoHud/archive/v${MY_PV}${MY_PV_REV}.tar.gz -> ${P}.tar.gz
+	https://github.com/ocornut/imgui/archive/v${IMGUI_VER}.tar.gz -> imgui-${IMGUI_VER}.tar.gz
+	https://wrapdb.mesonbuild.com/v2/imgui_${IMGUI_VER}-${IMGUI_MESON_WRAP_VER}/get_patch -> imgui-${IMGUI_VER}-${IMGUI_MESON_WRAP_VER}-meson-wrap.zip
+"
+
+KEYWORDS="-* ~amd64 ~x86"
+
+LICENSE="MIT"
+SLOT="0"
+IUSE="+dbus debug +X xnvctrl wayland video_cards_nvidia"
+
+REQUIRED_USE="
+	|| ( X wayland )
+	xnvctrl? ( video_cards_nvidia )"
+
+BDEPEND="
+	app-arch/unzip
+	dev-python/mako[${PYTHON_USEDEP}]
+	dev-libs/spdlog
+	dev-util/glslang
+	>=dev-util/vulkan-headers-1.2
+	media-libs/vulkan-loader[${MULTILIB_USEDEP}]
+	media-libs/libglvnd[$MULTILIB_USEDEP]
+	dbus? ( sys-apps/dbus[${MULTILIB_USEDEP}] )
+	X? ( x11-libs/libX11[${MULTILIB_USEDEP}] )
+	video_cards_nvidia? (
+		x11-drivers/nvidia-drivers[${MULTILIB_USEDEP}]
+		xnvctrl? ( x11-drivers/nvidia-drivers[static-libs] )
+	)
+	wayland? ( dev-libs/wayland[${MULTILIB_USEDEP}] )
+"
+
+RDEPEND="${BDEPEND}"
+
+S="${WORKDIR}/MangoHud-${PV}"
+
+src_unpack() {
+	default
+	[ -n "${MY_PV_REV}" ] && ( mv ${WORKDIR}/MangoHud-${MY_PV}${MY_PV_REV} ${WORKDIR}/MangoHud-${PV} || die )
+
+	unpack imgui-${IMGUI_VER}.tar.gz
+	unpack imgui-${IMGUI_VER}-${IMGUI_MESON_WRAP_VER}-meson-wrap.zip
+	mv ${WORKDIR}/imgui-${IMGUI_VER} ${S}/subprojects/imgui || die
+}
+
+src_prepare() {
+	default
+	eapply "${FILESDIR}/mangonhud-0.6.6-meson-build.patch"
+}
+
+multilib_src_configure() {
+	local emesonargs=(
+		-Dappend_libdir_mangohud=false
+		-Duse_system_spdlog=enabled
+		-Duse_system_vulkan=enabled
+		-Dinclude_doc=false
+		$(meson_feature video_cards_nvidia with_nvml)
+		$(meson_feature xnvctrl with_xnvctrl)
+		$(meson_feature X with_x11)
+		$(meson_feature wayland with_wayland)
+		$(meson_feature dbus with_dbus)
+	)
+	meson_src_configure
+}
+
+pkg_postinst() {
+	if ! use xnvctrl; then
+		einfo ""
+		einfo "If mangohud can't get GPU load, or other GPU information,"
+		einfo "and you have an older Nvidia device."
+		einfo ""
+		einfo "Try enabling the 'xnvctrl' useflag."
+		einfo ""
+	fi
+}

games-util/mangohud/metadata.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>adel.ks@zegrapher.com</email>
+		<name>Adel KARA SLIMANE</name>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">flightlessmango/MangoHud</remote-id>
+		<bugs-to>https://github.com/flightlessmango/MangoHud/issues</bugs-to>
+	</upstream>
+	<use>
+		<flag name="xnvctrl">"Use XNVctrl as fall back for older Nvidia devices."</flag>
+	</use>
+</pkgmetadata>