# Copyright 1999-2018 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

EAPI=6
PYTHON_COMPAT=( python3_{4,5,6} )

if [[ "${PV}" == "9999" ]]; then
	EGIT_REPO_URI="https://github.com/KhronosGroup/Vulkan-Tools.git"
	EGIT_SUBMODULES=()
	inherit git-r3
else
	EGIT_COMMIT="384fff68c802a10b5d7f4f352a4bb43b3efe5f23"
	KEYWORDS="~amd64"
	SRC_URI="https://github.com/KhronosGroup/Vulkan-Tools/archive/${EGIT_COMMIT}.tar.gz -> ${P}.tar.gz"
	S="${WORKDIR}/Vulkan-Tools-${EGIT_COMMIT}"
fi

inherit python-any-r1 cmake-multilib

DESCRIPTION="Official Vulkan Tools and Utilities for Windows, Linux, Android, and MacOS"
HOMEPAGE="https://github.com/KhronosGroup/Vulkan-Tools"

LICENSE="Apache-2.0"
SLOT="0"
IUSE="+cube +vulkaninfo X wayland"

# Old packaging will cause file collisions
RDEPEND="!<=media-libs/vulkan-loader-1.1.70.0-r999"
DEPEND="${PYTHON_DEPS}
	cube? ( dev-util/glslang:=[${MULTILIB_USEDEP}] )
	dev-util/vulkan-headers
	media-libs/vulkan-loader:=[${MULTILIB_USEDEP},wayland?,X?]
	wayland? ( dev-libs/wayland:=[${MULTILIB_USEDEP}] )
	X? (
		x11-libs/libX11:=[${MULTILIB_USEDEP}]
		x11-libs/libXrandr:=[${MULTILIB_USEDEP}]
	   )"

# Vulkaninfo does not support wayland
REQUIRED_USE="|| ( X wayland )
			  vulkaninfo? ( X )"

multilib_src_configure() {
	local mycmakeargs=(
		-DCMAKE_SKIP_RPATH=True
		-DBUILD_CUBE=$(usex cube)
		-DBUILD_VULKANINFO=$(usex vulkaninfo)
		-DBUILD_WSI_MIR_SUPPORT=False
		-DBUILD_WSI_WAYLAND_SUPPORT=$(usex wayland)
		-DBUILD_WSI_XCB_SUPPORT=$(usex X)
		-DBUILD_WSI_XLIB_SUPPORT=$(usex X)
		-DGLSLANG_INSTALL_DIR="/usr"
		-DVULKAN_HEADERS_INSTALL_DIR="/usr"
	)

	# Upstream only supports one window system at a time
	# If X is set at all, even if wayland is set, use X
	#
	# If -cube and/or -vulkaninfo is set, the flags we set
	# are ignored, so we don't need to consider that
	if use X; then
		mycmakeargs+=(
			-DCUBE_WSI_SELECTION="XCB"
			-DVULKANINFO_WSI_SELECTION="XCB"
		)
	fi

	if ! use X && use wayland; then
		mycmakeargs+=(
			-DCUBE_WSI_SELECTION="WAYLAND"
		)
	fi

	cmake-utils_src_configure
}

multilib_src_install() {
	cmake-utils_src_install

	if use cube; then
		mv "${ED%/}"/usr/bin/cube "${ED%/}"/usr/bin/vulkancube || die
		mv "${ED%/}"/usr/bin/cubepp "${ED%/}"/usr/bin/vulkancubecpp || die
	fi
}

pkg_postinst() {
	einfo "The cube and cubepp demos have been renamed to"
	einfo "vulkancube and vulkancubecpp to prevent collisions"
}