# Copyright Gentoo Foundation
# Public domain

EAPI=6
PYTHON_COMPAT=( python{3_4,3_5,3_6,3_7} )
MULTILIB_COMPAT=( abi_x86_{32,64} )
inherit python-any-r1 git-r3 multilib-minimal flag-o-matic

DESCRIPTION="AMD Open Source Driver for Vulkan"
HOMEPAGE="https://github.com/GPUOpen-Drivers/AMDVLK"

RESTRICT="mirror"

LICENSE="MIT"
SLOT="9999"
KEYWORDS="~amd64 ~x86"
IUSE="debug wayland"

DEPEND="dev-util/cmake
wayland? (
dev-libs/wsa[${MULTILIB_USEDEP}]
)
dev-util/vulkan-headers"
RDEPEND="${PYTHON_DEPS}
x11-libs/libdrm[${MULTILIB_USEDEP}]
x11-libs/libXrandr[${MULTILIB_USEDEP}]
virtual/libstdc++
x11-libs/libxcb[${MULTILIB_USEDEP}]
x11-libs/libxshmfence[${MULTILIB_USEDEP}]
dev-util/vulkan-headers
media-libs/vulkan-loader[${MULTILIB_USEDEP}]
net-misc/curl
wayland? (
dev-libs/wsa[${MULTILIB_USEDEP}]
)"




FETCH_URI="https://github.com/GPUOpen-Drivers"

src_unpack() {
	mkdir -p ${S}/drivers
	cd ${S}/drivers
    #for those who wants update ebuild: check https://github.com/GPUOpen-Drivers/AMDVLK/blob/master/default.xml
    #and place it in the constructions
    #Fetching: git-r3_fetch «repo» «commit»
    #Then placing it: git-r3_checkout «repo» «part»

    
    #xgl
    PART="xgl"
    COMMIT_ID="61ee6484930effa39fc806c2f941c5f073a2dfbe"
    mkdir $PART 
    git-r3_fetch "${FETCH_URI}/${PART}" ${COMMIT_ID}
    git-r3_checkout "${FETCH_URI}/${PART}" ${S}/drivers/$PART

    #pal
    PART="pal"
    COMMIT_ID="94501ac9adc214f5c61de042205929eb8681d175"
    mkdir $PART 
    git-r3_fetch "${FETCH_URI}/${PART}" ${COMMIT_ID}
    git-r3_checkout "${FETCH_URI}/${PART}" ${S}/drivers/$PART

    #pal
    PART="llpc"
    COMMIT_ID="cf5610192a65cddb20c0775b46013067fc7f3d2c"
    mkdir $PART 
    git-r3_fetch "${FETCH_URI}/${PART}" ${COMMIT_ID}
    git-r3_checkout "${FETCH_URI}/${PART}" ${S}/drivers/$PART
    
    #spvgen
    PART="spvgen"
    COMMIT_ID="59095d3469e4fb7506da0e3d0cd78904ed71682f"
    mkdir $PART
    git-r3_fetch "${FETCH_URI}/${PART}" ${COMMIT_ID}
    git-r3_checkout "${FETCH_URI}/${PART}" ${S}/drivers/$PART
    
    #AMDVLK
    PART="AMDVLK"
    COMMIT_ID="735d2043656edbc5c5ef1babc19709f5a3cf8a9f"
    mkdir $PART
    git-r3_fetch "${FETCH_URI}/${PART}" ${COMMIT_ID}
    git-r3_checkout "${FETCH_URI}/${PART}" ${S}/drivers/$PART
    
    #LLVM. At this moment we had to download appropriate source code to build amdvlk.
    PART="llvm"
    COMMIT_ID="97cc33415120ae3ed472b6dd5cb234b74a80bd80"
    mkdir $PART 
    git-r3_fetch "${FETCH_URI}/${PART}" ${COMMIT_ID}
    git-r3_checkout "${FETCH_URI}/${PART}" ${S}/drivers/$PART
    }
    
src_prepare(){
	cat << EOF > "${T}/10-amdvlk-dri3.conf" || die
Section "Device"
Identifier "AMDgpu"
Option  "DRI" "3"
EndSection
EOF
default
}

multilib_src_configure() {
    local myconf=()
	cd "${S}/drivers/xgl"
	if use abi_x86_64 && multilib_is_native_abi
	then myconf+=( -Bbuilds/Release64 )
	else 
	myconf+=( -Bbuilds/Release -DCMAKE_C_FLAGS=-m32 -DCMAKE_CXX_FLAGS=-m32 )
    fi
    if use debug 
    then myconf+=( -DCMAKE_BUILD_TYPE=Debug )
    fi
    cmake -H. "${myconf[@]}"
    if use wayland
    then myconf+=( -DBUILD_WAYLAND_SUPPORT=ON -DBUILD_WSA=On)
    fi
}

multilib_src_compile() {
    ewarn "AMDVLK seems doesn't currently support -O2, -O3 and -Os CFLAFS so fallback it to -O1."
    ewarn "See https://github.com/GPUOpen-Drivers/AMDVLK/issues/56 "
    ewarn "And also there are issues with avx:"
    ewarn "https://github.com/GPUOpen-Drivers/AMDVLK/issues/50"
    replace-flags -O2 -O1
    replace-flags -Os -O1
    filter-flag -O3
    append-flags -mno-avx -mno-avx2 -fstack-protector-strong -fno-plt
	if use abi_x86_64 && multilib_is_native_abi
    then BUILD_DIR="${S}/drivers/xgl/builds/Release64"
    else BUILD_DIR="${S}/drivers/xgl/builds/Release"
    fi
	cd ${BUILD_DIR}
	emake
}

multilib_src_install() {
	if use abi_x86_64 && multilib_is_native_abi
	then BUILD_DIR="${S}/drivers/xgl/builds/Release64"  
	mkdir -p $D/usr/lib64/
	mv "${BUILD_DIR}/icd/amdvlk64.so" $D/usr/lib64/
    insinto /usr/share/vulkan/icd.d
	doins ${S}/drivers/AMDVLK/json/Redhat/amd_icd64.json
	else BUILD_DIR="${S}/drivers/xgl/builds/Release"
	mkdir -p $D/usr/lib/
	mv "${BUILD_DIR}/icd/amdvlk32.so" $D/usr/lib/
    insinto /usr/share/vulkan/icd.d
	doins ${S}/drivers/AMDVLK/json/Redhat/amd_icd32.json
	fi
}
multilib_src_install_all(){
	insinto /usr/share/X11/xorg.conf.d/
	doins ${T}/10-amdvlk-dri3.conf
	ewarn "AMDVLK Requires DRI3 so istalled /usr/share/X11/xorg.conf.d/10-amdvlk-dri3.conf"
	ewarn "It's safe to double xorg configuration files if you have already had ones"
}
pkg_postinst() {
        elog "More information about the configuration can be found here:"
        elog " https://github.com/GPUOpen-Drivers/AMDVLK"
        ewarn "Make sure following line is NOT included in the any Xorg configuration section: "
        ewarn "Driver      \"modesetting\""
        
}