#
# leptonica
#

###############################################################################
#
# cmake settings
#
###############################################################################

cmake_minimum_required(VERSION 3.1.3)
cmake_policy(SET CMP0054 NEW)

# In-source builds are disabled.
if ("${CMAKE_CURRENT_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_BINARY_DIR}")
    message(FATAL_ERROR
        "CMake generation is not possible within the source directory!"
        "\n Remove the CMakeCache.txt file and try again from another folder, e.g.:"
        "\n "
        "\n rm CMakeCache.txt"
        "\n mkdir build"
        "\n cd build"
        "\n cmake .."
    )
endif()

set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH};${CMAKE_CURRENT_SOURCE_DIR}/cmake")

set(EXECUTABLE_OUTPUT_PATH "${CMAKE_CURRENT_BINARY_DIR}/bin")
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${EXECUTABLE_OUTPUT_PATH}")

# Use solution folders.
set_property(GLOBAL PROPERTY USE_FOLDERS ON)
set_property(GLOBAL PROPERTY PREDEFINED_TARGETS_FOLDER "CMake Targets")

###############################################################################
#
# project settings
#
###############################################################################

project(leptonica C CXX)

set(VERSION_MAJOR 1)
set(VERSION_MINOR 81)
set(VERSION_PATCH 0)
set(VERSION_PLAIN ${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH})
set(MINIMUM_WEBPMUX_VERSION 0.5.0)

option(BUILD_PROG "Build utility programs" OFF)
if (WIN32)
    option(SW_BUILD "Build with sw" ON)
else()
    option(SW_BUILD "Build with sw" OFF)
endif()
if(UNIX)
    option(SYM_LINK "Create symlink leptonica -> lept on UNIX" OFF)
endif()

if(NOT SW_BUILD)
    find_package(GIF)
    find_package(JPEG)
    find_package(PNG)
    find_package(TIFF)
    find_package(ZLIB)
    find_package(PkgConfig)
    if (PKG_CONFIG_FOUND)
        pkg_check_modules(WEBP libwebp QUIET)
        pkg_check_modules(WEBPMUX libwebpmux>=${MINIMUM_WEBPMUX_VERSION} QUIET)
        pkg_check_modules(JP2K libopenjp2>=2.0 QUIET)
    endif()
    if(NOT WEBP)
        find_path(WEBP_INCLUDE_DIR /webp/decode.h)
        find_library(WEBP_LIBRARY NAMES webp)
        if (WEBP_INCLUDE_DIR AND WEBP_LIBRARY)
            set(WEBP 1)
            set(WEBP_FOUND TRUE)
            set(WEBP_LIBRARIES ${WEBP_LIBRARY})
            set(WEBP_INCLUDE_DIRS ${WEBP_INCLUDE_DIR})
        endif()
    endif()
    if(NOT WEBPMUX)
        find_path(WEBPMUX_INCLUDE_DIR /webp/mux.h)
        #TODO:  check minimal required version
        if(NOT WEBPMUX_INCLUDE_DIR)
            message(STATUS "Can not find: /webp/mux.h")
        endif()
        if(NOT "${WEBPMUX_INCLUDE_DIR}" STREQUAL "${WEBP_INCLUDE_DIR}")
            set(WEBP_INCLUDE_DIRS ${WEBP_INCLUDE_DIRS} ${WEBPMUX_INCLUDE_DIR})
        endif()
        find_library(WEBPMUX_LIBRARY NAMES webpmux)
        if (WEBPMUX_INCLUDE_DIR AND WEBPMUX_LIBRARY)
            set(WEBPMUX 1)
            set(HAVE_LIBWEBP_ANIM 1)
            set(WEBPMUX_FOUND TRUE)
            set(WEBP_LIBRARIES ${WEBP_LIBRARIES} ${WEBPMUX_LIBRARY})
        endif()
    endif()
    if(NOT JP2K)
        find_path(JP2K_INCLUDE_DIR /openjpeg-2.3/openjpeg.h)
        find_library(JP2K_LIBRARY NAMES openjp2)
        if (JP2K_INCLUDE_DIR AND JP2K_LIBRARY)
             set(JP2K 1)
             set(JP2K_FOUND TRUE)
             set(JP2K_LIBRARIES ${JP2K_LIBRARY})
             set(JP2K_INCLUDE_DIRS ${JP2K_INCLUDE_DIR})
             set(HAVE_LIBJP2K 1)
        endif()
    endif()    
    if(NOT JP2K)
        find_path(JP2K_INCLUDE_DIR /openjpeg-2.4/openjpeg.h)
        find_library(JP2K_LIBRARY NAMES openjp2)
        if (JP2K_INCLUDE_DIR AND JP2K_LIBRARY)
             set(JP2K 1)
             set(JP2K_FOUND TRUE)
             set(JP2K_LIBRARIES ${JP2K_LIBRARY})
             set(JP2K_INCLUDE_DIRS ${JP2K_INCLUDE_DIR})
             set(HAVE_LIBJP2K 1)
        endif()
    endif()
else() # SW_BUILD=ON
    find_package(SW REQUIRED)
    sw_add_package(
        org.sw.demo.gif
        org.sw.demo.jpeg
        org.sw.demo.glennrp.png
        org.sw.demo.tiff
        org.sw.demo.webmproject.webp
        org.sw.demo.uclouvain.openjpeg.openjp2
    )
    sw_execute()

    add_definitions(
        -DHAVE_LIBGIF=1
        -DHAVE_LIBJPEG=1
        -DHAVE_LIBPNG=1
        -DHAVE_LIBTIFF=1
        -DHAVE_LIBWEBP=1
        -DHAVE_LIBWEBP_ANIM=1
        -DHAVE_LIBZ=1

        -DHAVE_LIBJP2K=1
        -DLIBJP2K_HEADER="openjpeg.h"
    )
endif()

###############################################################################
#
# compiler and linker
#
###############################################################################

if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
  set(CLANG 1)
endif()

# Set a default build type if none was specified
if(NOT CMAKE_BUILD_TYPE)
    message(STATUS "Setting build type to 'Release' as none was specified.")
    set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
    set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release")
else()
    message("CMAKE_BUILD_TYPE = ${CMAKE_BUILD_TYPE}")
endif()

include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)

macro(CHECK_CCXX_COMPILER_FLAG _FLAG _RESULT)
    check_c_compiler_flag(${_FLAG} C_HAS${_RESULT})
    check_cxx_compiler_flag(${_FLAG} CXX_HAS${_RESULT})
endmacro()

if (MSVC)
    add_definitions(-D_CRT_SECURE_NO_WARNINGS)
    add_compile_options("$<$<CONFIG:Release>:/W1;/Ox>")
    add_compile_options("$<$<CONFIG:Debug>:/W4;/DDEBUG>")
    if (NOT CLANG)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
    endif()
else()
   if (CMAKE_BUILD_TYPE MATCHES "[Dd][Ee][Bb][Uu][Gg]")
        # Enable warnings and Optimize for Debugging
        foreach(FLAG -Wall -Wextra -Werror=format-security -pedantic -Og -g3 "-fdebug-prefix-map=${CMAKE_SOURCE_DIR}=.")
            string(REGEX REPLACE "[^A-Za-z0-9]" "_" flag_var "${FLAG}")
            check_ccxx_compiler_flag(${FLAG} ${flag_var})
            if(C_HAS${flag_var})
                set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${FLAG}")
            endif()
            if(CXX_HAS${flag_var})
                set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${FLAG}")
            endif()
        endforeach()
        add_definitions(-DDEBUG)
    endif()
endif()

###############################################################################
#
# configure
#
###############################################################################

set(AUTOCONFIG_SRC ${CMAKE_CURRENT_BINARY_DIR}/config_auto.h.in)
set(AUTOCONFIG ${CMAKE_CURRENT_BINARY_DIR}/src/config_auto.h)
if (HAVE_LIBJP2K)
  set(ADDITIONAL_INCLUDE_DIRS "${JP2K_INCLUDE_DIR}")
endif()
set(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} "${CMAKE_PREFIX_PATH}/include" "${CMAKE_INSTALL_PREFIX}/include" "${ADDITIONAL_INCLUDE_DIRS}")


include(Configure)

configure_file(${AUTOCONFIG_SRC} ${AUTOCONFIG} @ONLY)

set(INCLUDE_DIR "${CMAKE_INSTALL_PREFIX}/include" "${CMAKE_INSTALL_PREFIX}/include/leptonica")

###############################################################################
#
# Show summary
#
###############################################################################
message( STATUS )
message( STATUS "General configuration for Leptonica ${VERSION_PLAIN}")
message( STATUS "--------------------------------------------------------")
message( STATUS "Build type: ${CMAKE_BUILD_TYPE}")
message( STATUS "Compiler: ${CMAKE_C_COMPILER_ID}")
message( STATUS "C compiler options: ${CMAKE_C_FLAGS_${CMAKE_BUILD_TYPE_UP}} ${CMAKE_C_FLAGS}")
message( STATUS "Linker options: ${CMAKE_EXE_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS_${CMAKE_BUILD_TYPE_UP}}")
message( STATUS "Install directory: ${CMAKE_INSTALL_PREFIX}")
message( STATUS )
message( STATUS "Build with sw [SW_BUILD]: ${SW_BUILD}")
message( STATUS "Build utility programs [BUILD_PROG]: ${BUILD_PROG}")
if(NOT SW_BUILD)
    message( STATUS "Used ZLIB library: ${ZLIB_LIBRARIES}")
    message( STATUS "Used PNG library:  ${PNG_LIBRARIES}")
    message( STATUS "Used JPEG library: ${JPEG_LIBRARIES}")
    message( STATUS "Used JP2K library: ${JP2K_LIBRARIES}")
    message( STATUS "Used TIFF library: ${TIFF_LIBRARIES}")
    message( STATUS "Used GIF library:  ${GIF_LIBRARIES}")
    message( STATUS "Used WEBP library: ${WEBP_LIBRARIES}")
endif()
message( STATUS "--------------------------------------------------------")
message( STATUS )

###############################################################################
#
# build
#
###############################################################################

add_definitions(-DHAVE_CONFIG_H)

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/src)
include_directories(${CMAKE_CURRENT_BINARY_DIR}/src)

if (BUILD_PROG)
add_subdirectory(prog)
endif()

add_subdirectory(src)

get_target_property(leptonica_NAME leptonica NAME)
get_target_property(leptonica_VERSION leptonica VERSION)
get_target_property(leptonica_OUTPUT_NAME leptonica OUTPUT_NAME)

configure_file(lept.pc.cmake ${CMAKE_CURRENT_BINARY_DIR}/lept.pc @ONLY)
configure_file(
    ${CMAKE_CURRENT_SOURCE_DIR}/cmake/templates/LeptonicaConfig-version.cmake.in
    ${CMAKE_CURRENT_BINARY_DIR}/LeptonicaConfig-version.cmake @ONLY)
configure_file(
    ${CMAKE_CURRENT_SOURCE_DIR}/cmake/templates/LeptonicaConfig.cmake.in
    ${CMAKE_CURRENT_BINARY_DIR}/LeptonicaConfig.cmake @ONLY)

install(FILES ${CMAKE_CURRENT_BINARY_DIR}/lept.pc DESTINATION lib/pkgconfig)
install(FILES
    ${CMAKE_CURRENT_BINARY_DIR}/LeptonicaConfig.cmake
    ${CMAKE_CURRENT_BINARY_DIR}/LeptonicaConfig-version.cmake
    DESTINATION lib/cmake)

########################################
# uninstall target
########################################
if(NOT TARGET uninstall)
    configure_file(
        "${CMAKE_CURRENT_SOURCE_DIR}/cmake/templates/cmake_uninstall.cmake.in"
        "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
        IMMEDIATE @ONLY)

    add_custom_target(uninstall
        COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)
endif()

###############################################################################