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62 lines
2.3 KiB
62 lines
2.3 KiB
# - Find the native PNG includes and library
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#
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# This module defines
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# PNG_INCLUDE_DIR, where to find png.h, etc.
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# PNG_LIBRARIES, the libraries to link against to use PNG.
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# PNG_DEFINITIONS - You should add_definitons(${PNG_DEFINITIONS}) before compiling code that includes png library files.
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# PNG_FOUND, If false, do not try to use PNG.
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# also defined, but not for general use are
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# PNG_LIBRARY, where to find the PNG library.
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# None of the above will be defined unles zlib can be found.
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# PNG depends on Zlib
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#=============================================================================
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# Copyright 2002-2009 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distributed this file outside of CMake, substitute the full
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# License text for the above reference.)
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if(PNG_FIND_QUIETLY)
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set(_FIND_ZLIB_ARG QUIET)
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endif(PNG_FIND_QUIETLY)
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find_package(ZLIB ${_FIND_ZLIB_ARG})
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if(ZLIB_FOUND)
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find_path(PNG_PNG_INCLUDE_DIR png.h
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/usr/local/include/libpng # OpenBSD
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)
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set(PNG_NAMES ${PNG_NAMES} png libpng png14 libpng14 png14d libpng14d png12 libpng12 png12d libpng12d)
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find_library(PNG_LIBRARY NAMES ${PNG_NAMES} )
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if (PNG_LIBRARY AND PNG_PNG_INCLUDE_DIR)
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# png.h includes zlib.h. Sigh.
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SET(PNG_INCLUDE_DIR ${PNG_PNG_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR} )
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SET(PNG_LIBRARIES ${PNG_LIBRARY} ${ZLIB_LIBRARY})
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if (CYGWIN)
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if(BUILD_SHARED_LIBS)
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# No need to define PNG_USE_DLL here, because it's default for Cygwin.
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else(BUILD_SHARED_LIBS)
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SET (PNG_DEFINITIONS -DPNG_STATIC)
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endif(BUILD_SHARED_LIBS)
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endif (CYGWIN)
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endif (PNG_LIBRARY AND PNG_PNG_INCLUDE_DIR)
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endif(ZLIB_FOUND)
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# handle the QUIETLY and REQUIRED arguments and set PNG_FOUND to TRUE if
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# all listed variables are TRUE
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(PNG DEFAULT_MSG PNG_LIBRARY PNG_PNG_INCLUDE_DIR)
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mark_as_advanced(PNG_PNG_INCLUDE_DIR PNG_LIBRARY )
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