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Diffstat (limited to 'share/cmake-3.10/Modules/FindPNG.cmake')
| -rw-r--r-- | share/cmake-3.10/Modules/FindPNG.cmake | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/share/cmake-3.10/Modules/FindPNG.cmake b/share/cmake-3.10/Modules/FindPNG.cmake new file mode 100644 index 0000000..dceb6bc --- /dev/null +++ b/share/cmake-3.10/Modules/FindPNG.cmake @@ -0,0 +1,148 @@ +# Distributed under the OSI-approved BSD 3-Clause License. See accompanying +# file Copyright.txt or https://cmake.org/licensing for details. + +#.rst: +# FindPNG +# ------- +# +# Find libpng, the official reference library for the PNG image format. +# +# Imported targets +# ^^^^^^^^^^^^^^^^ +# +# This module defines the following :prop_tgt:`IMPORTED` target: +# +# ``PNG::PNG`` +# The libpng library, if found. +# +# Result variables +# ^^^^^^^^^^^^^^^^ +# +# This module will set the following variables in your project: +# +# ``PNG_INCLUDE_DIRS`` +# where to find png.h, etc. +# ``PNG_LIBRARIES`` +# the libraries to link against to use PNG. +# ``PNG_DEFINITIONS`` +# You should add_definitions(${PNG_DEFINITIONS}) before compiling code +# that includes png library files. +# ``PNG_FOUND`` +# If false, do not try to use PNG. +# ``PNG_VERSION_STRING`` +# the version of the PNG library found (since CMake 2.8.8) +# +# Obsolete variables +# ^^^^^^^^^^^^^^^^^^ +# +# The following variables may also be set, for backwards compatibility: +# +# ``PNG_LIBRARY`` +# where to find the PNG library. +# ``PNG_INCLUDE_DIR`` +# where to find the PNG headers (same as PNG_INCLUDE_DIRS) +# +# Since PNG depends on the ZLib compression library, none of the above +# will be defined unless ZLib can be found. + +if(PNG_FIND_QUIETLY) + set(_FIND_ZLIB_ARG QUIET) +endif() +find_package(ZLIB ${_FIND_ZLIB_ARG}) + +if(ZLIB_FOUND) + find_path(PNG_PNG_INCLUDE_DIR png.h + /usr/local/include/libpng # OpenBSD + ) + + list(APPEND PNG_NAMES png libpng) + unset(PNG_NAMES_DEBUG) + set(_PNG_VERSION_SUFFIXES 17 16 15 14 12) + if (PNG_FIND_VERSION MATCHES "^([0-9]+)\\.([0-9]+)(\\..*)?$") + set(_PNG_VERSION_SUFFIX_MIN "${CMAKE_MATCH_1}${CMAKE_MATCH_2}") + if (PNG_FIND_VERSION_EXACT) + set(_PNG_VERSION_SUFFIXES ${_PNG_VERSION_SUFFIX_MIN}) + else () + string(REGEX REPLACE + "${_PNG_VERSION_SUFFIX_MIN}.*" "${_PNG_VERSION_SUFFIX_MIN}" + _PNG_VERSION_SUFFIXES "${_PNG_VERSION_SUFFIXES}") + endif () + unset(_PNG_VERSION_SUFFIX_MIN) + endif () + foreach(v IN LISTS _PNG_VERSION_SUFFIXES) + list(APPEND PNG_NAMES png${v} libpng${v}) + list(APPEND PNG_NAMES_DEBUG png${v}d libpng${v}d) + endforeach() + unset(_PNG_VERSION_SUFFIXES) + # For compatibility with versions prior to this multi-config search, honor + # any PNG_LIBRARY that is already specified and skip the search. + if(NOT PNG_LIBRARY) + find_library(PNG_LIBRARY_RELEASE NAMES ${PNG_NAMES}) + find_library(PNG_LIBRARY_DEBUG NAMES ${PNG_NAMES_DEBUG}) + include(${CMAKE_CURRENT_LIST_DIR}/SelectLibraryConfigurations.cmake) + select_library_configurations(PNG) + mark_as_advanced(PNG_LIBRARY_RELEASE PNG_LIBRARY_DEBUG) + endif() + unset(PNG_NAMES) + unset(PNG_NAMES_DEBUG) + + # Set by select_library_configurations(), but we want the one from + # find_package_handle_standard_args() below. + unset(PNG_FOUND) + + if (PNG_LIBRARY AND PNG_PNG_INCLUDE_DIR) + # png.h includes zlib.h. Sigh. + set(PNG_INCLUDE_DIRS ${PNG_PNG_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR} ) + set(PNG_INCLUDE_DIR ${PNG_INCLUDE_DIRS} ) # for backward compatibility + set(PNG_LIBRARIES ${PNG_LIBRARY} ${ZLIB_LIBRARY}) + + if (CYGWIN) + if(BUILD_SHARED_LIBS) + # No need to define PNG_USE_DLL here, because it's default for Cygwin. + else() + set (PNG_DEFINITIONS -DPNG_STATIC) + endif() + endif () + + if(NOT TARGET PNG::PNG) + add_library(PNG::PNG UNKNOWN IMPORTED) + set_target_properties(PNG::PNG PROPERTIES + INTERFACE_COMPILE_DEFINITIONS "${PNG_DEFINITIONS}" + INTERFACE_INCLUDE_DIRECTORIES "${PNG_INCLUDE_DIRS}" + INTERFACE_LINK_LIBRARIES ZLIB::ZLIB) + if(EXISTS "${PNG_LIBRARY}") + set_target_properties(PNG::PNG PROPERTIES + IMPORTED_LINK_INTERFACE_LANGUAGES "C" + IMPORTED_LOCATION "${PNG_LIBRARY}") + endif() + if(EXISTS "${PNG_LIBRARY_RELEASE}") + set_property(TARGET PNG::PNG APPEND PROPERTY + IMPORTED_CONFIGURATIONS RELEASE) + set_target_properties(PNG::PNG PROPERTIES + IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "C" + IMPORTED_LOCATION_RELEASE "${PNG_LIBRARY_RELEASE}") + endif() + if(EXISTS "${PNG_LIBRARY_DEBUG}") + set_property(TARGET PNG::PNG APPEND PROPERTY + IMPORTED_CONFIGURATIONS DEBUG) + set_target_properties(PNG::PNG PROPERTIES + IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "C" + IMPORTED_LOCATION_DEBUG "${PNG_LIBRARY_DEBUG}") + endif() + endif() + endif () + + if (PNG_PNG_INCLUDE_DIR AND EXISTS "${PNG_PNG_INCLUDE_DIR}/png.h") + file(STRINGS "${PNG_PNG_INCLUDE_DIR}/png.h" png_version_str REGEX "^#define[ \t]+PNG_LIBPNG_VER_STRING[ \t]+\".+\"") + + string(REGEX REPLACE "^#define[ \t]+PNG_LIBPNG_VER_STRING[ \t]+\"([^\"]+)\".*" "\\1" PNG_VERSION_STRING "${png_version_str}") + unset(png_version_str) + endif () +endif() + +include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) +find_package_handle_standard_args(PNG + REQUIRED_VARS PNG_LIBRARY PNG_PNG_INCLUDE_DIR + VERSION_VAR PNG_VERSION_STRING) + +mark_as_advanced(PNG_PNG_INCLUDE_DIR PNG_LIBRARY ) |