# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

CMAKE_ECLASS=cmake
inherit cmake

DESCRIPTION="Library for encoding and decoding .avif files"
HOMEPAGE="https://github.com/AOMediaCodec/libavif"
SRC_URI="https://github.com/AOMediaCodec/libavif/archive/v${PV}.tar.gz -> ${P}.tar.gz"

LICENSE="BSD-2"
SLOT="0"
KEYWORDS="~amd64"
IUSE="dav1d +libaom"

REQUIRED_USE="|| ( dav1d libaom )"

DEPEND="dav1d? ( media-libs/dav1d )
	libaom? ( >=media-libs/libaom-1.1 )
	media-libs/libpng
"
RDEPEND="${DEPEND}"
BDEPEND=""

src_configure() {
	if ! use libaom ; then
		ewarn "libaom flag is not set,"
		ewarn "libavif will work in read-only mode."
		ewarn "Enable libaom flag if you want to save .AVIF files."
	fi
	local mycmakeargs=(
		-DAVIF_CODEC_DAV1D=$(usex dav1d ON OFF)
		-DAVIF_CODEC_AOM=$(usex libaom ON OFF)
		-DBUILD_SHARED_LIBS=ON
		-DAVIF_BUILD_APPS=ON
	)
	cmake_src_configure
}

pkg_postinst() {
	if ! use libaom ; then
		ewarn "libaom flag is not set,"
		ewarn "libavif will work in read-only mode."
		ewarn "Enable libaom flag if you want to save .AVIF files."
	fi

	if use libaom ; then
		elog "When you upgrade libaom in the future,"
		elog "you may need to re-emerge libavif again"
		elog "to ensure correct AVIF import/export functions."
	fi
}