cmake_minimum_required(VERSION 3.2...3.5)

project(libjpeg)

include(CheckIncludeFile)
include(CheckSymbolExists)
include(CheckCSourceCompiles)

# to distinguish between debug and release lib
if(NOT DISABLE_FORCE_DEBUG_POSTFIX)
    set(CMAKE_DEBUG_POSTFIX "d")
endif()

check_include_file(stddef.h HAVE_STDDEF_H)
check_include_file(stdlib.h HAVE_STDLIB_H)
check_include_file(string.h HAVE_STRING_H)
check_symbol_exists(size_t stddef.h stdlib.h stdio.h HAVE_ANSI_SIZE_T)
check_symbol_exists(setmode io.h USE_SETMODE)
check_c_source_compiles(
"
void f()
{
    char x[ (char)0xff ]; /* x[-1] if signed */
}
"
CHAR_IS_UNSIGNED)

check_c_source_compiles(
"
void f()
{
    char x[ ((signed char)0xff) >> 1 ]; /* x[-1] if signed */
}
"
RIGHT_SHIFT_IS_UNSIGNED)

if(NOT HAVE_STRING_H)
    set(NEED_BSD_STRINGS TRUE)
else()
    set(NEED_BSD_STRINGS FALSE)
endif()

if(NOT HAVE_ANSI_SIZE_T)
    set(NEED_SYS_TYPES_H TRUE)
else()
    set(NEED_SYS_TYPES_H FALSE)
endif()

file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/include/")
configure_file("${CMAKE_CURRENT_SOURCE_DIR}/jconfig.h.in" "${CMAKE_CURRENT_BINARY_DIR}/include/jconfig.h")

add_library(libjpeg
    jaricom.c
    jcapimin.c
    jcapistd.c
    jcarith.c
    jccoefct.c
    jccolor.c
    jcdctmgr.c
    jchuff.c
    jcinit.c
    jcmainct.c
    jcmarker.c
    jcmaster.c
    jcomapi.c
    jcparam.c
    jcprepct.c
    jcsample.c
    jctrans.c
    jdapimin.c
    jdapistd.c
    jdarith.c
    jdatadst.c
    jdatasrc.c
    jdcoefct.c
    jdcolor.c
    jddctmgr.c
    jdhuff.c
    jdinput.c
    jdmainct.c
    jdmarker.c
    jdmaster.c
    jdmerge.c
    jdpostct.c
    jdsample.c
    jdtrans.c
    jerror.c
    jfdctflt.c
    jfdctfst.c
    jfdctint.c
    jidctflt.c
    jidctfst.c
    jidctint.c
    jquant1.c
    jquant2.c
    jutils.c
    jmemmgr.c
    jmemnobs.c
)

if(NOT MSVC)
    set_target_properties(libjpeg PROPERTIES
        OUTPUT_NAME "jpeg"
        CLEAN_DIRECT_OUTPUT 1)
else()
    set_target_properties(libjpeg PROPERTIES
        OUTPUT_NAME "jpeg_static"
        CLEAN_DIRECT_OUTPUT 1)
endif()

target_include_directories(libjpeg PRIVATE "${CMAKE_CURRENT_BINARY_DIR}/include/")

option(JPEG_BUILD_EXECUTABLES "Also compiule executables" ON)

if(JPEG_BUILD_EXECUTABLES)
    add_executable(cjpeg cjpeg.c rdppm.c rdgif.c rdtarga.c rdrle.c rdbmp.c rdswitch.c cdjpeg.c)
    target_link_libraries(cjpeg libjpeg)

    add_executable(djpeg djpeg.c wrppm.c wrgif.c wrtarga.c wrrle.c wrbmp.c rdcolmap.c cdjpeg.c)
    target_link_libraries(djpeg libjpeg)

    add_executable(jpegtran jpegtran.c rdswitch.c cdjpeg.c transupp.c)
    target_link_libraries(jpegtran libjpeg)

    add_executable(rdjpgcom rdjpgcom.c)

    add_executable(wrjpgcom wrjpgcom.c)

    install(
        TARGETS cjpeg djpeg jpegtran rdjpgcom wrjpgcom
        EXPORT "libjpegTargets"
        LIBRARY DESTINATION "lib"
        ARCHIVE DESTINATION "lib"
        RUNTIME DESTINATION "bin"
        INCLUDES DESTINATION "include"
    )
endif()

install(
    TARGETS libjpeg
    EXPORT "libjpegTargets"
    LIBRARY DESTINATION "lib"
    ARCHIVE DESTINATION "lib"
    RUNTIME DESTINATION "bin"
    INCLUDES DESTINATION "include"
)

install(
    FILES
        "${CMAKE_CURRENT_BINARY_DIR}/include/jconfig.h" jerror.h jmorecfg.h jpeglib.h
    DESTINATION "include"
)

install(
    EXPORT "libjpegTargets"
    DESTINATION "lib/cmake/libjpeg"
)