cmake_minimum_required(VERSION 3.4)

include(GNUInstallDirs)

project(FreeImage C CXX)

find_package(zlib REQUIRED)
find_package(PNG REQUIRED)
find_package(JPEG REQUIRED)
find_package(TIFF REQUIRED)
find_package(OPENJPEG REQUIRED)

# Include some custom Find***.cmake modules 
list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)

find_package(WEBP REQUIRED)
find_package(JXR  REQUIRED)
find_package(LibRaw REQUIRED)

option(BUILD_SHARED_LIBS "Build shared libraries" ON)
option(INSTALL_HEADERS "Install the development headers" ON)

set(REAL_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/Source)

# Add a debug postfix
set(CMAKE_DEBUG_POSTFIX "d")
 
# For now the internal copy of OpenEXR is used (as a private always static library)
file(GLOB OPENEXR_PRIVATE_HEADERS ${REAL_SOURCE_DIR}/OpenEXR/Half/*.h
                                  ${REAL_SOURCE_DIR}/OpenEXR/Iex/*.h
                                  ${REAL_SOURCE_DIR}/OpenEXR/IexMath/*.h
                                  ${REAL_SOURCE_DIR}/OpenEXR/IlmImf/*.h
                                  ${REAL_SOURCE_DIR}/OpenEXR/IlmThread/*.h
                                  ${REAL_SOURCE_DIR}/OpenEXR/Imath/*.h
                                  ${REAL_SOURCE_DIR}/OpenEXR/*.h)
                                  
file(GLOB OPENEXR_SRCS ${REAL_SOURCE_DIR}/OpenEXR/Half/*.cpp
                       ${REAL_SOURCE_DIR}/OpenEXR/Iex/*.cpp
                       ${REAL_SOURCE_DIR}/OpenEXR/IexMath/*.cpp
                       ${REAL_SOURCE_DIR}/OpenEXR/IlmImf/*.cpp
                       ${REAL_SOURCE_DIR}/OpenEXR/IlmThread/*.cpp
                       ${REAL_SOURCE_DIR}/OpenEXR/Imath/*.cpp)
                       
add_library(FreeImage_Private_OpenEXR STATIC ${OPENEXR_PRIVATE_HEADERS} ${OPENEXR_SRCS})

set(FreeImage_Private_OpenEXR_INCLUDE_DIRS ${REAL_SOURCE_DIR}/OpenEXR
                                           ${REAL_SOURCE_DIR}/OpenEXR/Half
                                           ${REAL_SOURCE_DIR}/OpenEXR/Iex
                                           ${REAL_SOURCE_DIR}/OpenEXR/IexMath
                                           ${REAL_SOURCE_DIR}/OpenEXR/IlmImf
                                           ${REAL_SOURCE_DIR}/OpenEXR/IlmThread
                                           ${REAL_SOURCE_DIR}/OpenEXR/Imath)

target_include_directories(FreeImage_Private_OpenEXR PRIVATE ${FreeImage_Private_OpenEXR_INCLUDE_DIRS}
                                                             ${ZLIB_INCLUDE_DIRS})

# List the public header files
set(PUBLIC_HEADERS ${REAL_SOURCE_DIR}/FreeImage.h)

# List the private header files
set(ROOT_PRIVATE_HEADERS ${REAL_SOURCE_DIR}/CacheFile.h 
                         ${REAL_SOURCE_DIR}/FreeImageIO.h 
                         ${REAL_SOURCE_DIR}/MapIntrospector.h
                         ${REAL_SOURCE_DIR}/Plugin.h 
                         ${REAL_SOURCE_DIR}/Quantizers.h 
                         ${REAL_SOURCE_DIR}/ToneMapping.h 
                         ${REAL_SOURCE_DIR}/Utilities.h
                         ${REAL_SOURCE_DIR}/DeprecationManager/DeprecationMgr.h)
                         
file(GLOB FREEIMAGE_PRIVATE_HEADERS ${REAL_SOURCE_DIR}/FreeImage/*.h)
file(GLOB FREEIMAGE_TOOLKIT_PRIVATE_HEADERS ${REAL_SOURCE_DIR}/FreeImageToolkit/*.h)
file(GLOB METADATA_PRIVATE_HEADERS ${REAL_SOURCE_DIR}/Metadata/*.h)

set(PRIVATE_HEADERS ${ROOT_PRIVATE_HEADERS}
                    ${FREEIMAGE_PRIVATE_HEADERS}
                    ${FREEIMAGE_TOOLKIT_PRIVATE_HEADERS}
                    ${METADATA_PRIVATE_HEADERS})

# List the source files
file(GLOB DEPRECATION_SRCS ${REAL_SOURCE_DIR}/DeprecationManager/*.cpp)
file(GLOB FREEIMAGE_TOOLKIT_SRCS ${REAL_SOURCE_DIR}/FreeImageToolkit/*.cpp)
file(GLOB FREEIMAGE_SRCS ${REAL_SOURCE_DIR}/FreeImage/*.cpp)
file(GLOB METADATA_SRCS ${REAL_SOURCE_DIR}/Metadata/*.cpp)

# The G3 plugin is disabled because it require the private copy of tiff
list(REMOVE_ITEM FREEIMAGE_SRCS ${REAL_SOURCE_DIR}/FreeImage/PluginG3.cpp)

# The JPEGTransform plugin is disable because it requires a private copy of jpeg 
list(REMOVE_ITEM FREEIMAGE_TOOLKIT_SRCS ${REAL_SOURCE_DIR}/FreeImageToolkit/JPEGTransform.cpp)


set(SRCS ${DEPRECATION_SRCS}
         ${FREEIMAGE_SRCS}
         ${FREEIMAGE_TOOLKIT_SRCS}
         ${METADATA_SRCS}
)

# If FreeImage is used as a static library, FREEIMAGE_LIB 
# needs to be defined (at the C preprocessor level) to correctly 
# define (to nothing instead of _declspec(dllimport) ) the DLL_API macro.
# For this purpouse we include (depending on the BUILD_SHARED_LIBS )
# the appropriate FreeImageConfig.h .
if(${BUILD_SHARED_LIBS})
    configure_file(${CMAKE_CURRENT_SOURCE_DIR}/FreeImageConfig-dynamic.h ${CMAKE_CURRENT_BINARY_DIR}/FreeImageConfig.h)
else()
    configure_file(${CMAKE_CURRENT_SOURCE_DIR}/FreeImageConfig-static.h ${CMAKE_CURRENT_BINARY_DIR}/FreeImageConfig.h)
endif()
list(APPEND PUBLIC_HEADERS ${CMAKE_CURRENT_BINARY_DIR}/FreeImageConfig.h)

add_library(FreeImage ${SRCS} ${PRIVATE_HEADERS} ${PUBLIC_HEADERS})

if(${BUILD_SHARED_LIBS})
    target_compile_definitions(FreeImage PRIVATE -DFREEIMAGE_EXPORTS)
else()
    target_compile_definitions(FreeImage PRIVATE -DFREEIMAGE_LIB)
endif()

target_include_directories(FreeImage PRIVATE ${REAL_SOURCE_DIR}
                                             ${ZLIB_INCLUDE_DIRS} 
                                             ${JPEG_INCLUDE_DIRS}
                                             ${TIFF_INCLUDE_DIRS}
                                             ${PNG_INCLUDE_DIRS}
                                             ${OPENJPEG_INCLUDE_DIRS}
                                             ${WEBP_INCLUDE_DIRS}
                                             ${JXR_INCLUDE_DIRS}
                                             ${LibRaw_INCLUDE_DIRS}
                                             ${FreeImage_Private_OpenEXR_INCLUDE_DIRS}
                                             ${CMAKE_CURRENT_BINARY_DIR})


target_link_libraries(FreeImage ${ZLIB_LIBRARIES}
                                ${JPEG_LIBRARIES}
                                ${TIFF_LIBRARIES}
                                ${PNG_LIBRARIES}
                                ${OPENJPEG_LIBRARIES}
                                ${WEBP_LIBRARIES}
                                ${JXR_LIBRARIES}
                                ${LibRaw_LIBRARIES}
                                FreeImage_Private_OpenEXR)

target_compile_definitions(FreeImage PRIVATE ${PNG_DEFINITIONS})

# FreeImagePlus
file(GLOB FREEIMAGEPLUS_SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/Wrapper/FreeImagePlus/src/*.cpp)
add_library(FreeImagePlus
    ${FREEIMAGEPLUS_SOURCES}
    ${CMAKE_CURRENT_SOURCE_DIR}/Wrapper/FreeImagePlus/FreeImagePlus.h
    ${CMAKE_CURRENT_SOURCE_DIR}/Wrapper/FreeImagePlus/FreeImagePlus.rc)

if(${BUILD_SHARED_LIBS})
    target_compile_definitions(FreeImagePlus PRIVATE -DFIP_EXPORTS)
else()
    target_compile_definitions(FreeImagePlus PRIVATE -DFREEIMAGE_LIB)
endif()

target_include_directories(FreeImagePlus PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/Wrapper/FreeImagePlus
                                                 ${CMAKE_CURRENT_BINARY_DIR}
                                                 ${REAL_SOURCE_DIR})

target_link_libraries(FreeImagePlus PUBLIC FreeImage)

list(APPEND PUBLIC_HEADERS ${CMAKE_CURRENT_SOURCE_DIR}/Wrapper/FreeImagePlus/FreeImagePlus.h)

install(TARGETS FreeImage
        COMPONENT runtime
        RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT bin
        LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT shlib
        ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT lib)

install(TARGETS FreeImagePlus
        COMPONENT runtime-cpp
        RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT bin
        LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT shlib
        ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT lib)

if(INSTALL_HEADERS)
    install(FILES ${PUBLIC_HEADERS} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
endif()