Modules/FindTIFF.cmake

# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.

#[=======================================================================[.rst:
FindTIFF
--------

Find the TIFF library (``libtiff``, https://libtiff.gitlab.io/libtiff/).

Optional COMPONENTS
^^^^^^^^^^^^^^^^^^^

This module supports the optional component `CXX`, for use with the COMPONENTS
argument of the :command:`find_package` command. This component has an associated
imported target, as described below.

Imported targets
^^^^^^^^^^^^^^^^

This module defines the following :prop_tgt:`IMPORTED` targets:

``TIFF::TIFF``
  The TIFF library, if found.

``TIFF::CXX``
  The C++ wrapper libtiffxx, if requested by the `COMPONENTS CXX` option,
  if the compiler is not MSVC (which includes the C++ wrapper in libtiff),
  and if found.

Result variables
^^^^^^^^^^^^^^^^

This module will set the following variables in your project:

``TIFF_FOUND``
  true if the TIFF headers and libraries were found
``TIFF_INCLUDE_DIR``
  the directory containing the TIFF headers
``TIFF_INCLUDE_DIRS``
  the directory containing the TIFF headers
``TIFF_LIBRARIES``
  TIFF libraries to be linked

Cache variables
^^^^^^^^^^^^^^^

The following cache variables may also be set:

``TIFF_INCLUDE_DIR``
  the directory containing the TIFF headers
``TIFF_LIBRARY_RELEASE``
  the path to the TIFF library for release configurations
``TIFF_LIBRARY_DEBUG``
  the path to the TIFF library for debug configurations
``TIFFXX_LIBRARY_RELEASE``
  the path to the TIFFXX library for release configurations
``TIFFXX_LIBRARY_DEBUG``
  the path to the TIFFXX library for debug configurations
#]=======================================================================]

cmake_policy(PUSH)
cmake_policy(SET CMP0057 NEW)

find_path(TIFF_INCLUDE_DIR tiff.h)

set(TIFF_NAMES ${TIFF_NAMES} tiff libtiff tiff3 libtiff3)
foreach(name ${TIFF_NAMES})
  list(APPEND TIFF_NAMES_DEBUG "${name}d")
endforeach()

if(NOT TIFF_LIBRARY)
  find_library(TIFF_LIBRARY_RELEASE NAMES ${TIFF_NAMES})
  find_library(TIFF_LIBRARY_DEBUG NAMES ${TIFF_NAMES_DEBUG})
  include(${CMAKE_CURRENT_LIST_DIR}/SelectLibraryConfigurations.cmake)
  select_library_configurations(TIFF)
  mark_as_advanced(TIFF_LIBRARY_RELEASE TIFF_LIBRARY_DEBUG)
endif()

if(TIFF_INCLUDE_DIR AND EXISTS "${TIFF_INCLUDE_DIR}/tiffvers.h")
    file(STRINGS "${TIFF_INCLUDE_DIR}/tiffvers.h" tiff_version_str
         REGEX "^#define[\t ]+TIFFLIB_VERSION_STR[\t ]+\"LIBTIFF, Version .*")

    string(REGEX REPLACE "^#define[\t ]+TIFFLIB_VERSION_STR[\t ]+\"LIBTIFF, Version +([^ \\n]*).*"
           "\\1" TIFF_VERSION_STRING "${tiff_version_str}")
    unset(tiff_version_str)
endif()

foreach(_comp IN LISTS TIFF_FIND_COMPONENTS)
  if(_comp STREQUAL "CXX")
    if(MSVC)
      # C++ bindings are built into the main tiff library.
      set(TIFF_CXX_FOUND 1)
    else()
      foreach(name ${TIFF_NAMES})
        list(APPEND TIFFXX_NAMES "${name}xx")
        list(APPEND TIFFXX_NAMES_DEBUG "${name}xxd")
      endforeach()
      find_library(TIFFXX_LIBRARY_RELEASE NAMES ${TIFFXX_NAMES})
      find_library(TIFFXX_LIBRARY_DEBUG NAMES ${TIFFXX_NAMES_DEBUG})
      include(${CMAKE_CURRENT_LIST_DIR}/SelectLibraryConfigurations.cmake)
      select_library_configurations(TIFFXX)
      mark_as_advanced(TIFFXX_LIBRARY_RELEASE TIFFXX_LIBRARY_DEBUG)
      unset(TIFFXX_NAMES)
      unset(TIFFXX_NAMES_DEBUG)
      if(TIFFXX_LIBRARY)
        set(TIFF_CXX_FOUND 1)
      endif()
    endif()
  endif()
endforeach()
unset(_comp)

unset(TIFF_NAMES)
unset(TIFF_NAMES_DEBUG)

include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(TIFF
                                  HANDLE_COMPONENTS
                                  REQUIRED_VARS TIFF_LIBRARY TIFF_INCLUDE_DIR
                                  VERSION_VAR TIFF_VERSION_STRING)

if(TIFF_FOUND)
  set(TIFF_LIBRARIES ${TIFF_LIBRARY})
  if("CXX" IN_LIST TIFF_FIND_COMPONENTS AND NOT MSVC)
    list(APPEND TIFF_LIBRARIES ${TIFFXX_LIBRARY})
  endif()

  set(TIFF_INCLUDE_DIRS "${TIFF_INCLUDE_DIR}")

  if(NOT TARGET TIFF::TIFF)
    add_library(TIFF::TIFF UNKNOWN IMPORTED)
    if(TIFF_INCLUDE_DIRS)
      set_target_properties(TIFF::TIFF PROPERTIES
        INTERFACE_INCLUDE_DIRECTORIES "${TIFF_INCLUDE_DIRS}")
    endif()
    if(EXISTS "${TIFF_LIBRARY}")
      set_target_properties(TIFF::TIFF PROPERTIES
        IMPORTED_LINK_INTERFACE_LANGUAGES "C"
        IMPORTED_LOCATION "${TIFF_LIBRARY}")
    endif()
    if(EXISTS "${TIFF_LIBRARY_RELEASE}")
      set_property(TARGET TIFF::TIFF APPEND PROPERTY
        IMPORTED_CONFIGURATIONS RELEASE)
      set_target_properties(TIFF::TIFF PROPERTIES
        IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "C"
        IMPORTED_LOCATION_RELEASE "${TIFF_LIBRARY_RELEASE}")
    endif()
    if(EXISTS "${TIFF_LIBRARY_DEBUG}")
      set_property(TARGET TIFF::TIFF APPEND PROPERTY
        IMPORTED_CONFIGURATIONS DEBUG)
      set_target_properties(TIFF::TIFF PROPERTIES
        IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "C"
        IMPORTED_LOCATION_DEBUG "${TIFF_LIBRARY_DEBUG}")
    endif()
  endif()

  if(NOT TARGET TIFF::CXX)
    if(MSVC)
      add_library(TIFF::CXX INTERFACE IMPORTED)
      set_property(TARGET TIFF::CXX PROPERTY INTERFACE_LINK_LIBRARIES TIFF::TIFF)
    else()
      add_library(TIFF::CXX UNKNOWN IMPORTED)
      set_property(TARGET TIFF::CXX PROPERTY INTERFACE_LINK_LIBRARIES TIFF::TIFF)
      if(TIFF_INCLUDE_DIRS)
        set_target_properties(TIFF::CXX PROPERTIES
          INTERFACE_INCLUDE_DIRECTORIES "${TIFF_INCLUDE_DIRS}")
      endif()
      if(EXISTS "${TIFFXX_LIBRARY}")
        set_target_properties(TIFF::CXX PROPERTIES
          IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
          IMPORTED_LOCATION "${TIFFXX_LIBRARY}")
      endif()
      if(EXISTS "${TIFFXX_LIBRARY_RELEASE}")
        set_property(TARGET TIFF::CXX APPEND PROPERTY
          IMPORTED_CONFIGURATIONS RELEASE)
        set_target_properties(TIFF::CXX PROPERTIES
          IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "CXX"
          IMPORTED_LOCATION_RELEASE "${TIFFXX_LIBRARY_RELEASE}")
      endif()
      if(EXISTS "${TIFFXX_LIBRARY_DEBUG}")
        set_property(TARGET TIFF::CXX APPEND PROPERTY
          IMPORTED_CONFIGURATIONS DEBUG)
        set_target_properties(TIFF::CXX PROPERTIES
          IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "CXX"
          IMPORTED_LOCATION_DEBUG "${TIFFXX_LIBRARY_DEBUG}")
      endif()
    endif()
  endif()

endif()

mark_as_advanced(TIFF_INCLUDE_DIR)
cmake_policy(POP)