1 files changed, 68 insertions, 0 deletions
diff --git a/cmake/Findlibpng.cmake b/cmake/Findlibpng.cmake
new file mode 100644
index 0000000..62c4d87
--- /dev/null
+++ b/cmake/Findlibpng.cmake
@@ -0,0 +1,68 @@
+#
+# 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()
+\ No newline at end of file