# Copyright (c) 2012, Intel Corporation
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
# * Neither the name of Intel Corporation nor the names of its contributors may
#   be used to endorse or promote products derived from this software without
#   specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# Try to find Harfbuzz include and library directories.
#
# After successful discovery, this will set for inclusion where needed:
# HARFBUZZ_INCLUDE_DIRS - containg the HarfBuzz headers
# HARFBUZZ_LIBRARIES - containg the HarfBuzz library

include(FindPkgConfig)
pkg_check_modules(PC_HARFBUZZ QUIET harfbuzz)

find_path(HARFBUZZ_INCLUDE_DIRS
    NAMES hb.h
    HINTS ${PC_HARFBUZZ_INCLUDEDIR}
          ${PC_HARFBUZZ_INCLUDE_DIRS}
    PATH_SUFFIXES harfbuzz
)

find_library(HARFBUZZ_LIBRARIES NAMES harfbuzz
    HINTS ${PC_HARFBUZZ_LIBDIR}
          ${PC_HARFBUZZ_LIBRARY_DIRS}
)

if (HARFBUZZ_INCLUDE_DIRS)
    if (EXISTS "${HARFBUZZ_INCLUDE_DIRS}/hb-version.h")
        file(READ "${HARFBUZZ_INCLUDE_DIRS}/hb-version.h" _harfbuzz_version_content)

        string(REGEX MATCH "#define +HB_VERSION_STRING +\"([0-9]+\\.[0-9]+\\.[0-9]+)\"" _dummy "${_harfbuzz_version_content}")
        set(HARFBUZZ_VERSION "${CMAKE_MATCH_1}")
    endif ()
endif ()

if ("${harfbuzz_FIND_VERSION}" VERSION_GREATER "${HARFBUZZ_VERSION}")
    message(FATAL_ERROR "Required version (" ${harfbuzz_FIND_VERSION} ") is higher than found version (" ${HARFBUZZ_VERSION} ")")
endif ()

include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(
    harfbuzz 
        REQUIRED_VARS HARFBUZZ_INCLUDE_DIRS HARFBUZZ_LIBRARIES
        VERSION_VAR HARFBUZZ_VERSION)

mark_as_advanced(
    HARFBUZZ_INCLUDE_DIRS
    HARFBUZZ_LIBRARIES
)

# Allows easy linking as in 
#   target_link_libraries(freetype PRIVATE Harfbuzz::Harfbuzz)
if (NOT CMAKE_VERSION VERSION_LESS 3.1)
    if (HARFBUZZ_FOUND AND NOT TARGET Harfbuzz::Harfbuzz)
        add_library(Harfbuzz::Harfbuzz INTERFACE IMPORTED)
        set_target_properties(
            Harfbuzz::Harfbuzz PROPERTIES
                INTERFACE_INCLUDE_DIRECTORIES "${HARFBUZZ_INCLUDE_DIRS}")
    endif ()
endif ()