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https://github.com/VincentWei/MiniGUI.git
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45 lines
1.8 KiB
CMake
45 lines
1.8 KiB
CMake
# - This module determines the png library of the system
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# The following variables are set if the library found:
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# PNG_FOUND - If false do nnt try to use png.
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# PNG_INCLUDE_DIR - where to find the headfile of library.
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# PNG_LIBRARY_DIR - where to find the png library.
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# PNG_LIBRARY - the library needed to use png.
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# find the headfile of library
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set (CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ./)
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include (FindZLIB)
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if (ZLIB_FOUND)
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set (PNG_HEADS png.h)
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find_path (PNG_INCLUDE_DIR ${PNG_HEADS})
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set (PNG_NAMES png libpng png12 libpng12)
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find_library (PNG_LIBRARY NAMES ${PNG_NAMES})
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# just find one of dependency, guess other one.
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if (NOT PNG_LIBRARY AND PNG_INCLUDE_DIR)
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message ("We just find the headfile, try to guess the library location.")
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set (PNG_LIBRARY_DIR "${PNG_INCLUDE_DIR}/../lib")
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find_library (PNG_LIBRARY NAMES ${PNG_NAMES} PATHS ${PNG_LIBRARY_DIR})
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elseif (NOT PNG_INCLUDE_DIR AND PNG_LIBRARY)
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message ("We just find the lib file, try to guess the include location.")
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string (REGEX REPLACE "[a-z|A-Z|0-9|_|-]+[.].*$" "" PNG_LIBRARY_DIR ${PNG_LIBRARY})
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find_path (PNG_INCLUDE_DIR ${PNG_HEADS} "${PNG_LIBRARY_DIR}../included")
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endif()
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# find the library.
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if (PNG_INCLUDE_DIR AND PNG_LIBRARY)
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set (PNG_FOUND TRUE)
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if (NOT PNG_LIBRARY_DIR)
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string (REGEX REPLACE "[a-z|A-Z|0-9|_|-]+[.].*$" "" PNG_LIBRARY_DIR ${PNG_LIBRARY})
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endif ()
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string (REGEX MATCH "[a-z|A-Z|0-9|_|-]+[.](a|so|lib|dll|LIB|DLL)[^/]*$" PNG_LIBRARY_WHOLE_NAME "${PNG_LIBRARY}")
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string (REGEX MATCH "[^(lib)][a-z|A-Z|0-9|_|-]+" PNG_LIBRARY_NAME ${PNG_LIBRARY_WHOLE_NAME})
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message (STATUS "Find PNG include in ${PNG_INCLUDE_DIR}")
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message (STATUS "Find PNG library in ${PNG_LIBRARY}")
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else ()
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message (STATUS "Could NOT find PNG, (missing: PNG_INCLUDE_DIR PNG_LIBRARY)")
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endif ()
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endif (ZLIB_FOUND)
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