# Copyright 1999-2010 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="6"

CROS_WORKON_COMMIT="47eabd0e6b926535a68a7173eba2ceeb4ed9747e"
CROS_WORKON_TREE="d663408cd6538b6fee669db87ea77f6a38a37177"
CROS_WORKON_PROJECT="chromiumos/third_party/mesa"
CROS_WORKON_LOCALNAME="arc-mesa-virgl"
CROS_WORKON_EGIT_BRANCH="master"
CROS_WORKON_MANUAL_UPREV="1"

EGIT_REPO_URI="git://anongit.freedesktop.org/mesa/mesa"

MESON_AUTO_DEPEND=no

inherit base meson multilib-minimal flag-o-matic toolchain-funcs cros-workon arc-build

OPENGL_DIR="xorg-x11"

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} llvmpipe mach64 mga nouveau powervr r128 savage sis vmware tdfx via freedreno virgl"
for card in ${VIDEO_CARDS}; do
	IUSE_VIDEO_CARDS+=" video_cards_${card}"
done

# TODO(b/160748345): Remove hardcoded ARC_PLATFORM_SDK_VERSION when fixed.
ARC_PLATFORM_SDK_VERSION=28

IUSE="${IUSE_VIDEO_CARDS}
	android_aep -android_gles2 -android_gles30
	+android_gles31 -android_gles32	-android_vulkan_compute_0
	+cheets classic debug dri +egl +gallium
	-gbm +gles1 +gles2 -llvm +nptl pic selinux +shared-glapi -vulkan -X xlib-glx
	cheets_user cheets_user_64"

# llvmpipe requires ARC++ _userdebug images, ARC++ _user images can't use it
# (b/33072485, b/28802929).
# Only allow one vulkan driver as they all write vulkan.cheets.so.
REQUIRED_USE="
	^^ ( android_gles2 android_gles30 android_gles31 android_gles32 )
	android_aep? ( !android_gles2 !android_gles30 )
	android_vulkan_compute_0? ( vulkan )
	cheets? (
		vulkan? ( ^^ ( video_cards_amdgpu video_cards_intel video_cards_virgl ) )
		video_cards_amdgpu? ( llvm )
		video_cards_llvmpipe? ( !cheets_user !cheets_user_64 )
	)"

DEPEND="cheets? (
		>=x11-libs/arc-libdrm-2.4.82[${MULTILIB_USEDEP}]
		llvm? ( sys-devel/arc-llvm:=[${MULTILIB_USEDEP}] )
		video_cards_amdgpu? (
			dev-libs/arc-libelf[${MULTILIB_USEDEP}]
		)
	)"

RDEPEND="${DEPEND}"

# It is slow without texrels, if someone wants slow
# mesa without texrels +pic use is worth the shot
QA_EXECSTACK="usr/lib*/opengl/xorg-x11/lib/libGL.so*"
QA_WX_LOAD="usr/lib*/opengl/xorg-x11/lib/libGL.so*"

# Think about: ggi, fbcon, no-X configs

driver_list() {
	local uniq_driver=($(printf "%s\n" "$@" | sort -u))
	local IFS=,
	echo "${uniq_driver[*]}"
}

pkg_setup() {
	# workaround toc-issue wrt #386545
	use ppc64 && append-flags -mminimal-toc

	# Remove symlinks created by an earlier version so we don't have
	# install conflicts.
	# TODO: Delete this after June 2019, since everybody should have
	# upgraded by then.
	local d
	for d in EGL GL GLES GLES2 GLES3 KHR; do
		local replaced_link="${ROOT}${ARC_VM_PREFIX}/vendor/include/${d}"
		if [[ -L "${replaced_link}" ]]; then
			rm -f "${replaced_link}"
		fi
	done
}

src_prepare() {
	# workaround for cros-workon not preserving git metadata
	if [[ ${PV} == 9999* && "${CROS_WORKON_INPLACE}" != "1" ]]; then
		echo "#define MESA_GIT_SHA1 \"git-deadbeef\"" > src/git_sha1.h
	fi

	# apply patches
	if [[ ${PV} != 9999* && -n ${SRC_PATCHES} ]]; then
		EPATCH_FORCE="yes" \
		EPATCH_SOURCE="${WORKDIR}/patches" \
		EPATCH_SUFFIX="patch" \
		epatch
	fi
	# FreeBSD 6.* doesn't have posix_memalign().
	if [[ ${CHOST} == *-freebsd6.* ]]; then
		sed -i \
			-e "s/-DHAVE_POSIX_MEMALIGN//" \
			configure.ac || die
	fi

	# Restrict gles version based on USE flag. (See crbug.com/30202361, b/30202371, b/31041422, b:68023287)
	if use android_gles32; then
		einfo "Limiting android to gles32."
		epatch "${FILESDIR}/gles32/0001-limit-gles-version.patch"
	elif use android_gles31; then
		einfo "Limiting android to gles31."
		epatch "${FILESDIR}/gles31/0001-limit-gles-version.patch"
	elif use android_gles30; then
		einfo "Limiting android to gles30."
		epatch "${FILESDIR}/gles30/0001-limit-gles-version.patch"
	elif use android_gles2; then
		einfo "Limiting android to gles2."
		epatch "${FILESDIR}/gles2/0001-limit-gles-version.patch"
	fi

	epatch "${FILESDIR}"/FROMLIST-glcpp-Hack-to-handle-expressions-in-line-di.patch

	epatch "${FILESDIR}"/FROMLIST-egl-android-Increase-preferred-buffer-count-to-4.patch

	epatch "${FILESDIR}"/CHROMIUM-hack-Override-GL_RENDERER-for-kindle-app.patch

	# This is actually a reland of a reverted patch.
	# See https://gitlab.freedesktop.org/virgl/virglrenderer/-/issues/216
	epatch "${FILESDIR}"/UPSTREAM-virgl-fix-BGRA-emulation-artifacts-during-window-res.patch

	epatch "${FILESDIR}"/UPSTREAM-Revert-virgl-Cache-depth-and-stencil-buffers.patch

	default
}

src_configure() {
	cros_optimize_package_for_speed

	if use cheets; then
		#
		# cheets-specific overrides
		#

		arc-build-select-clang
	fi

	multilib-minimal_src_configure
}

multilib_src_configure() {
	tc-getPROG PKG_CONFIG pkg-config

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

	if use classic; then
	# Configurable DRI drivers
		# Intel code
		driver_enable video_cards_intel i965

		# Nouveau code
		driver_enable video_cards_nouveau nouveau

		# ATI code
		driver_enable video_cards_radeon r100 r200
	fi

	if use gallium; then
	# Configurable gallium drivers
		gallium_enable video_cards_llvmpipe 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_amdgpu amd
		vulkan_enable video_cards_intel intel
		vulkan_enable video_cards_virgl virtio-experimental
	fi

	export LLVM_CONFIG=${SYSROOT}/usr/bin/llvm-config-host
	EGL_PLATFORM="surfaceless"

	if use cheets; then
		#
		# cheets-specific overrides
		#

		MESA_PLATFORM_SDK_VERSION=${ARC_PLATFORM_SDK_VERSION}

		# Use llvm-config coming from ARC++ build.
		export LLVM_CONFIG="${ARC_SYSROOT}/build/bin/llvm-config-host"

		# FIXME(tfiga): Possibly use flag?
		EGL_PLATFORM="android"

		# The AOSP build system defines the Make variable
		# PLATFORM_SDK_VERSION, and Mesa's Android.mk files use it to
		# define the macro ANDROID_API_LEVEL. Arc emulates that here.
		if [[ -n "${ARC_PLATFORM_SDK_VERSION}" ]]; then
			CPPFLAGS+=" -DANDROID_API_LEVEL=${ARC_PLATFORM_SDK_VERSION}"
		fi

		#
		# end of arc-mesa specific overrides
		#
	fi

	if ! use llvm; then
		export LLVM_CONFIG="no"
	fi

	arc-build-create-cross-file

	emesonargs+=(
		$(use cheets && echo "--prefix=${ARC_VM_PREFIX}/vendor")
		$(use cheets && echo "--sysconfdir=/system/vendor/etc")
		$(use cheets && echo "-Ddri-search-path=/system/$(get_libdir)/dri:/system/vendor/$(get_libdir)/dri")
		-Dgallium-va=false
		-Dgallium-vdpau=false
		-Dgallium-xvmc=false
		-Dgallium-omx=disabled
		-Dglx=disabled
		-Ddri3=false
		-Dgles-lib-suffix=_mesa
		-Degl-lib-suffix=_mesa
		$(meson_use llvm)
		$(use egl && echo "-Dplatforms=${EGL_PLATFORM}")
		$(meson_use egl)
		$(meson_use gbm)
		$(meson_use gles1)
		$(meson_use gles2)
		$(meson_use selinux)
		$(meson_use shared-glapi)
		-Ddri-drivers=$(driver_list "${DRI_DRIVERS[@]}")
		-Dgallium-drivers=$(driver_list "${GALLIUM_DRIVERS[@]}")
		-Dvulkan-drivers=$(driver_list "${VULKAN_DRIVERS[@]}")
		--buildtype $(usex debug debug release)
		$(use cheets && echo "--cross-file=${ARC_CROSS_FILE}")
		$(use cheets && echo "-Dplatform-sdk-version=${ARC_PLATFORM_SDK_VERSION}")
	)

	meson_src_configure
}

# The meson eclass exports src_compile but not multilib_src_compile. src_compile
# gets overridden by multilib-minimal
multilib_src_compile() {
	meson_src_compile
}

multilib_src_install_cheets() {
	exeinto "${ARC_VM_PREFIX}/vendor/$(get_libdir)"
	newexe ${BUILD_DIR}/src/mapi/shared-glapi/libglapi.so.0 libglapi.so.0

	exeinto "${ARC_VM_PREFIX}/vendor/$(get_libdir)/egl"
	newexe ${BUILD_DIR}/src/egl/libEGL_mesa.so libEGL_mesa.so
	newexe ${BUILD_DIR}/src/mapi/es1api/libGLESv1_CM_mesa.so libGLESv1_CM_mesa.so
	newexe ${BUILD_DIR}/src/mapi/es2api/libGLESv2_mesa.so libGLESv2_mesa.so

	exeinto "${ARC_VM_PREFIX}/vendor/$(get_libdir)/dri"
	if use classic && use video_cards_intel; then
		newexe ${BUILD_DIR}/src/mesa/drivers/dri/libmesa_dri_drivers.so i965_dri.so
	fi
	if use gallium; then
		if use video_cards_llvmpipe; then
			newexe ${BUILD_DIR}/src/gallium/targets/dri/libgallium_dri.so kms_swrast_dri.so
		fi
		if use video_cards_amdgpu; then
			newexe ${BUILD_DIR}/src/gallium/targets/dri/libgallium_dri.so radeonsi_dri.so
		fi
		if use video_cards_virgl; then
			newexe ${BUILD_DIR}/src/gallium/targets/dri/libgallium_dri.so virtio_gpu_dri.so
		fi
	fi

	if use vulkan; then
		exeinto "${ARC_VM_PREFIX}/vendor/$(get_libdir)/hw"
		if use video_cards_amdgpu; then
			newexe ${BUILD_DIR}/src/amd/vulkan/libvulkan_radeon.so vulkan.cheets.so
		fi
		if use video_cards_intel; then
			newexe ${BUILD_DIR}/src/intel/vulkan/libvulkan_intel.so vulkan.cheets.so
		fi
		if use video_cards_virgl; then
			newexe "${BUILD_DIR}"/src/virtio/vulkan/libvulkan_virtio.so vulkan.cheets.so
		fi
	fi
}

multilib_src_install() {
	if use cheets; then
		multilib_src_install_cheets
		return
	fi

	meson_src_install

	# Remove redundant headers
	# GLU and GLUT
	rm -f "${D}"/usr/include/GL/glu*.h || die "Removing GLU and GLUT headers failed."
	# Glew includes
	rm -f "${D}"/usr/include/GL/{glew,glxew,wglew}.h \
		|| die "Removing glew includes failed."

	# Move libGL and others from /usr/lib to /usr/lib/opengl/blah/lib
	# because user can eselect desired GL provider.
	ebegin "Moving libGL and friends for dynamic switching"
		dodir /usr/$(get_libdir)/opengl/${OPENGL_DIR}/{lib,extensions,include}
		local x
		for x in "${D}"/usr/$(get_libdir)/libGL.{la,a,so*}; do
			if [ -f ${x} -o -L ${x} ]; then
				mv -f "${x}" "${D}"/usr/$(get_libdir)/opengl/${OPENGL_DIR}/lib \
					|| die "Failed to move ${x}"
			fi
		done
		for x in "${D}"/usr/include/GL/{gl.h,glx.h,glext.h,glxext.h}; do
			if [ -f ${x} -o -L ${x} ]; then
				mv -f "${x}" "${D}"/usr/$(get_libdir)/opengl/${OPENGL_DIR}/include \
					|| die "Failed to move ${x}"
			fi
		done
	eend $?

	dodir /usr/$(get_libdir)/dri
	insinto "/usr/$(get_libdir)/dri/"
	insopts -m0755
	# install the gallium drivers we use
	local gallium_drivers_files=( i915_dri.so 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

	# install classic drivers we use
	local classic_drivers_files=( i810_dri.so i965_dri.so nouveau_vieux_dri.so radeon_dri.so r200_dri.so )
	for x in ${classic_drivers_files[@]}; do
		if [ -f "${S}/$(get_libdir)/${x}" ]; then
			doins "${S}/$(get_libdir)/${x}"
		fi
	done
}

multilib_src_install_all_cheets() {
	# Set driconf option to enable S3TC hardware decompression
	insinto "${ARC_VM_PREFIX}/vendor/etc/"
	doins "${FILESDIR}"/drirc

	# For documentation on the feature set represented by each XML file
	# installed into /vendor/etc/permissions, see
	# <https://developer.android.com/reference/android/content/pm/PackageManager.html>.
	# For example XML files for each feature, see
	# <https://android.googlesource.com/platform/frameworks/native/+/master/data/etc>.

	# Install init files to advertise supported API versions.
	insinto "${ARC_VM_PREFIX}/vendor/etc/init"

	if use android_gles32; then
		doins "${FILESDIR}/gles32/init.gpu.rc"
	elif use android_gles31; then
		doins "${FILESDIR}/gles31/init.gpu.rc"
	elif use android_gles30; then
		doins "${FILESDIR}/gles30/init.gpu.rc"
	elif use android_gles2; then
		doins "${FILESDIR}/gles2/init.gpu.rc"
	fi

	# Install vulkan related files.
	# TODO(b/164152220): Enable vulkan for virtio gpu.
	if use vulkan; then
		einfo "Using android vulkan."
		insinto "${ARC_VM_PREFIX}/vendor/etc/init"
		doins "${FILESDIR}/vulkan.rc"

		insinto "${ARC_VM_PREFIX}/vendor/etc/permissions"
		if use video_cards_virgl; then
			doins "${FILESDIR}/android.hardware.vulkan.version-1_1.xml"
		else
			doins "${FILESDIR}/android.hardware.vulkan.version-1_0_3.xml"
		fi
		if use video_cards_intel || use video_cards_virgl; then
			doins "${FILESDIR}/android.hardware.vulkan.level-1.xml"
		else
			doins "${FILESDIR}/android.hardware.vulkan.level-0.xml"
		fi
	fi

	if use android_vulkan_compute_0; then
		einfo "Using android vulkan_compute_0."
		insinto "${ARC_VM_PREFIX}/vendor/etc/permissions"
		doins "${FILESDIR}/android.hardware.vulkan.compute-0.xml"
	fi

	# Install permission file to declare opengles aep support.
	if use android_aep; then
		einfo "Using android aep."
		insinto "${ARC_VM_PREFIX}/vendor/etc/permissions"
		doins "${FILESDIR}/android.hardware.opengles.aep.xml"
	fi

	# Install the dri header for arc-cros-gralloc
	insinto "${ARC_VM_PREFIX}/vendor/include/GL"
	doins -r "${S}/include/GL/internal"
}

multilib_src_install_all() {
	if use cheets; then
		multilib_src_install_all_cheets
		return
	fi

	# Set driconf option to enable S3TC hardware decompression
	insinto "/etc/"
	doins "${FILESDIR}"/drirc
}

pkg_postinst() {
	if use cheets; then
		return
	fi

	# Switch to the xorg implementation.
	echo
	eselect opengl set --use-old ${OPENGL_DIR}
}

# $1 - VIDEO_CARDS flag
# other args - names of DRI drivers to enable
driver_enable() {
	case $# in
		# for enabling unconditionally
		1)
			DRI_DRIVERS+=("$1")
			;;
		*)
			if use $1; then
				shift
				DRI_DRIVERS+=("$@")
			fi
			;;
	esac
}

gallium_enable() {
	case $# in
		# for enabling unconditionally
		1)
			GALLIUM_DRIVERS+=("$1")
			;;
		*)
			if use $1; then
				shift
				GALLIUM_DRIVERS+=("$@")
			fi
			;;
	esac
}

vulkan_enable() {
	case $# in
		# for enabling unconditionally
		1)
			VULKAN_DRIVERS+=("$1")
			;;
		*)
			if use $1; then
				shift
				VULKAN_DRIVERS+=("$@")
			fi
			;;
	esac
}