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#
# LIBPNG_INCLUDE_DIRS
# LIBPNG_LIBRARIES
# LIBPNG_CFLAGS
# LIBPNG_FOUND
find_package(PkgConfig QUIET)
if (PKG_CONFIG_FOUND)
pkg_check_modules(_LIBPNG libpng)
if (BUILD_STATIC AND NOT _LIBPNG_FOUND)
message(FATAL_ERROR "Cannot find static build information")
endif()
endif()
set(LIBPNG_FOUND ${_LIBPNG_FOUND})
if (_LIBPNG_FOUND) # we can rely on pkg-config
if (NOT BUILD_STATIC)
set(LIBPNG_LIBRARIES ${_LIBPNG_LIBRARIES})
set(LIBPNG_INCLUDE_DIRS ${_LIBPNG_INCLUDE_DIRS})
set(LIBPNG_CFLAGS ${_LIBPNG_CFLAGS_OTHER})
else()
set(LIBPNG_LIBRARIES ${_LIBPNG_STATIC_LIBRARIES})
set(LIBPNG_INCLUDE_DIRS ${_LIBPNG_STATIC_INCLUDE_DIRS})
set(LIBPNG_CFLAGS ${_LIBPNG_STATIC_CFLAGS_OTHER})
endif()
else()
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
set(_lib_suffix 64)
else()
set(_lib_suffix 32)
endif()
find_path(LIBPNG_INC
NAMES png.h
HINTS
ENV LIBPNGPath${_lib_suffix}
ENV LIBPNGPath
${_LIBPNG_INCLUDE_DIRS}
PATHS
/usr/include/libpng16 /usr/local/include/libpng16
/usr/include/libpng /usr/local/include/libpng)
find_library(LIBPNG_LIB
NAMES ${_LIBPNG_LIBRARIES} libpng.so libpng16.so
HINTS
ENV LIBPNGPath${_lib_suffix}
ENV LIBPNGPath
${_LIBPNG_LIBRARY_DIRS}
${_LIBPNG_STATIC_LIBRARY_DIRS}
PATHS
/usr/lib${_lib_suffix} /usr/local/lib${_lib_suffix}
/usr/lib /usr/local/lib)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(LIBPNG DEFAULT_MSG LIBPNG_LIB LIBPNG_INC)
mark_as_advanced(LIBPNG_INC LIBPNG_LIB)
if(LIBPNG_FOUND)
set(LIBPNG_INCLUDE_DIRS ${LIBPNG_INC})
set(LIBPNG_LIBRARIES ${LIBPNG_LIB})
if (BUILD_STATIC)
set(LIBPNG_LIBRARIES ${LIBPNG_LIBRARIES} ${_LIBPNG_STATIC_LIBRARIES})
endif()
endif()
endif()
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