CMake/FindPNG_OpenSG.cmake

   1 # - Find the native PNG includes and library
   2 #
   3 # This module defines
   4 #  PNG_INCLUDE_DIR, where to find png.h, etc.
   5 #  PNG_LIBRARIES, the libraries to link against to use PNG.
   6 #  PNG_DEFINITIONS - You should ADD_DEFINITONS(${PNG_DEFINITIONS}) before compiling code that includes png library files.
   7 #  PNG_FOUND, If false, do not try to use PNG.
   8 # also defined, but not for general use are
   9 #  PNG_LIBRARY, where to find the PNG library.
  10 # None of the above will be defined unles zlib can be found.
  11 # PNG depends on Zlib
  12 #INCLUDE(FindZLIB)
  13
  14 IF(ZLIB_FOUND)
  15 #  FIND_PATH(PNG_PNG_INCLUDE_DIR png.h
  16   FIND_PATH(PNG_INCLUDE_DIR png.h
  17   /usr/local/include/libpng             # OpenBSD
  18   )
  19
  20   SET(PNG_NAMES_RELEASE ${PNG_NAMES_RELEASE} png libpng png12 libpng12)
  21   FIND_LIBRARY(PNG_LIBRARY_RELEASE NAMES ${PNG_NAMES_RELEASE} )
  22
  23   SET(PNG_NAMES_DEBUG ${PNG_NAMES_DEBUG} pngd libpngd png12d libpng12d)
  24   FIND_LIBRARY(PNG_LIBRARY_DEBUG NAMES ${PNG_NAMES_DEBUG} )
  25
  26   SET(PNG_LIBRARIES_FOUND )
  27
  28   IF(PNG_LIBRARY_DEBUG)
  29     SET(PNG_LIBRARIES_FOUND TRUE)
  30     MARK_AS_ADVANCED(PNG_LIBRARY_DEBUG)
  31   ENDIF(PNG_LIBRARY_DEBUG)
  32
  33   IF(PNG_LIBRARY_RELEASE)
  34     SET(PNG_LIBRARIES_FOUND TRUE)
  35     MARK_AS_ADVANCED(PNG_LIBRARY_RELEASE)
  36   ENDIF(PNG_LIBRARY_RELEASE)
  37
  38
  39   IF(PNG_LIBRARIES_FOUND AND PNG_INCLUDE_DIR)
  40       # png.h includes zlib.h. Sigh.
  41 #      SET(PNG_INCLUDE_DIR ${PNG_PNG_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR} )
  42 #      SET(PNG_LIBRARIES ${PNG_LIBRARY} ${ZLIB_LIBRARY})
  43
  44       IF(CYGWIN)
  45         IF(BUILD_SHARED_LIBS)
  46            # No need to define PNG_USE_DLL here, because it's default for
  47            # Cygwin.
  48         ELSE(BUILD_SHARED_LIBS)
  49           SET (PNG_DEFINITIONS -DPNG_STATIC)
  50         ENDIF(BUILD_SHARED_LIBS)
  51       ENDIF (CYGWIN)
  52
  53   ENDIF(PNG_LIBRARIES_FOUND AND PNG_INCLUDE_DIR)
  54
  55 ENDIF(ZLIB_FOUND)
  56
  57 # handle the QUIETLY and REQUIRED arguments and set PNG_FOUND to TRUE if
  58 # all listed variables are TRUE
  59 INCLUDE(FindPackageHandleStandardArgs)
  60 FIND_PACKAGE_HANDLE_STANDARD_ARGS(PNG DEFAULT_MSG
  61                                   PNG_LIBRARIES_FOUND PNG_INCLUDE_DIR)
  62
  63 MARK_AS_ADVANCED(PNG_INCLUDE_DIR PNG_LIBRARIES_FOUND)