# ***** BEGIN GPL LICENSE BLOCK *****
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ***** END GPL LICENSE BLOCK *****

set(PNG_EXTRA_ARGS
	-DZLIB_LIBRARY=${LIBDIR}/zlib/lib/${ZLIB_LIBRARY}
	-DZLIB_INCLUDE_DIR=${LIBDIR}/zlib/include/
	-DPNG_STATIC=ON
)

ExternalProject_Add(external_png
	URL ${PNG_URI}
	DOWNLOAD_DIR ${DOWNLOAD_DIR}
	URL_HASH MD5=${PNG_HASH}
	PREFIX ${BUILD_DIR}/png
	CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${LIBDIR}/png ${DEFAULT_CMAKE_FLAGS} ${PNG_EXTRA_ARGS}
	INSTALL_DIR	${LIBDIR}/png
)

add_dependencies(external_png external_zlib)

if(BUILD_MODE STREQUAL Debug)
	ExternalProject_Add_Step(external_png after_install
		COMMAND ${CMAKE_COMMAND} -E copy ${LIBDIR}/png/lib/libpng16_staticd${LIBEXT} ${LIBDIR}/png/lib/libpng16${LIBEXT}
		DEPENDEES install
	)
endif()