#========================================================================
#
# xpdf/cmake-xpdf.txt
#
# CMake script for the Xpdf tools.
#
# Copyright 2015 Glyph & Cog, LLC
#
#========================================================================

include_directories("${PROJECT_SOURCE_DIR}")
include_directories("${PROJECT_BINARY_DIR}")
include_directories("${PROJECT_SOURCE_DIR}/goo")
include_directories("${PROJECT_SOURCE_DIR}/fofi")
include_directories("${PROJECT_SOURCE_DIR}/splash")

#------------------
## https://stackoverflow.com/questions/36220123/undefined-reference-to-png-set-longjmp-fn-when-compiling-pcl-source-file
## https://stackoverflow.com/questions/30980383/cmake-compile-options-for-libpng

# search for pkg-config
include (FindPkgConfig)
if (NOT PKG_CONFIG_FOUND)
    message (FATAL_ERROR "pkg-config not found")
endif ()

# check for libpng
pkg_check_modules (PNG libpng15 REQUIRED)
if (NOT PNG_FOUND)
    message(FATAL_ERROR "You don't seem to have libpng15 development libraries installed")
else ()
    include_directories (${PNG_INCLUDE_DIRS})
    link_directories (${PNG_LIBRARY_DIRS})
    link_libraries (${PNG_LIBRARIES})
endif ()
#------------------

if (ZLIB_FOUND)
  message(STATUS "@@@@@@@@@@@@@@@ ZLIB_FOUND ${ZLIB_LIBRARIES}")
  include_directories("${ZLIB_INCLUDE_DIRS}")
else ()
  message(STATUS "@@@@@@@@@@@@@@@ NOT ZLIB_FOUND")
endif ()
if (PNG_FOUND)
  message(STATUS "@@@@@@@@@@@@@@@ PNG_FOUND ${PNG_LINK_FLAGS}")
  include_directories("${PNG_INCLUDE_DIRS}")
  link_directories (${PNG_LIBRARY_DIRS})
  link_libraries (${PNG_LIBRARIES})
  add_definitions("${PNG_DEFINITIONS}")
else ()
  message(STATUS "@@@@@@@@@@@@@@@ NOT PNG_FOUND")
endif ()
if (HAVE_LCMS)
  include_directories("${LCMS_INCLUDE_DIR}")
  set(COLOR_MANAGER_SOURCE "ColorManager.cc")
else ()
  set(COLOR_MANAGER_SOURCE "")
endif ()

add_library(xpdf_objs OBJECT
  AcroForm.cc
  Annot.cc
  Array.cc
  BuiltinFont.cc
  BuiltinFontTables.cc
  Catalog.cc
  CharCodeToUnicode.cc
  CMap.cc
  ${COLOR_MANAGER_SOURCE}
  Decrypt.cc
  Dict.cc
  Error.cc
  FontEncodingTables.cc
  Form.cc
  Function.cc
  Gfx.cc
  GfxFont.cc
  GfxState.cc
  GlobalParams.cc
  JArithmeticDecoder.cc
  JBIG2Stream.cc
  JPXStream.cc
  Lexer.cc
  Link.cc
  NameToCharCode.cc
  Object.cc
  OptionalContent.cc
  Outline.cc
  OutputDev.cc
  Page.cc
  Parser.cc
  PDFDoc.cc
  PDFDocEncoding.cc
  PSTokenizer.cc
  SecurityHandler.cc
  Stream.cc
  TextString.cc
  UnicodeMap.cc
  UnicodeTypeTable.cc
  UTF8.cc
  XFAForm.cc
  XRef.cc
  Zoox.cc
)

#--- object files needed by XpdfWidget

if ((QT4_FOUND OR Qt5Widgets_FOUND)
    AND HAVE_SPLASH AND MULTITHREADED AND USE_EXCEPTIONS)

  if (HIGHLIGHTED_REGIONS)
    set(HIGHLIGHT_SRC "HighlightFile.cc")
  else ()
    set(HIGHLIGHT_SRC "")
  endif ()

  add_library(xpdf_widget_objs OBJECT
    DisplayState.cc
    PDFCore.cc
    PreScanOutputDev.cc
    PSOutputDev.cc
    SplashOutputDev.cc
    TextOutputDev.cc
    TileCache.cc
    TileCompositor.cc
    TileMap.cc
    ${HIGHLIGHT_SRC}
  )
endif ()

# We want to build static xpdf-tools binaries. See
# https://stackoverflow.com/questions/24648357/compiling-a-static-executable-with-cmake
# Want to make the min number of changes for building statically, so using this way:
SET(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
SET(BUILD_SHARED_LIBS OFF)
SET(CMAKE_EXE_LINKER_FLAGS "-static")
# See https://github.com/droe/sslsplit/issues/82
# for warnings of this nature:
#  ../goo/libgoo.a(gfile.cc.o): In function `getHomeDir()':
#  gfile.cc:(.text+0x55): warning: Using 'getpwnam' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
#  gfile.cc:(.text+0x90): warning: Using 'getpwuid' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
# See https://stackoverflow.com/questions/1620918/cmake-and-libpthread
# after googling cmake and "-lpthread" (pthread) after ERRORS to do with this, like:
#   undefined reference to `pthread_mutex_unlock'
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)

#-- libpng
# https://stackoverflow.com/questions/36220123/undefined-reference-to-png-set-longjmp-fn-when-compiling-pcl-source-file
# https://stackoverflow.com/questions/30980383/cmake-compile-options-for-libpng



#--- pdftops

if (HAVE_SPLASH)
  add_executable(pdftops
    $<TARGET_OBJECTS:xpdf_objs>
    PreScanOutputDev.cc
    PSOutputDev.cc
    SplashOutputDev.cc
    pdftops.cc
  )
  target_link_libraries(pdftops goo fofi splash
                        ${FREETYPE_LIBRARY} ${FREETYPE_OTHER_LIBS}
                        ${DTYPE_LIBRARY}
                        ${LCMS_LIBRARY}
			Threads::Threads)
else ()
  add_executable(pdftops
    $<TARGET_OBJECTS:xpdf_objs>
    PreScanOutputDev.cc
    PSOutputDev.cc
    pdftops.cc
  )
  target_link_libraries(pdftops goo fofi ${LCMS_LIBRARY} Threads::Threads)
endif ()
install(TARGETS pdftops RUNTIME DESTINATION bin)
install(FILES ${PROJECT_SOURCE_DIR}/doc/pdftops.1 DESTINATION man/man1)

#--- pdftotext

add_executable(pdftotext
  $<TARGET_OBJECTS:xpdf_objs>
  TextOutputDev.cc
  pdftotext.cc
)
target_link_libraries(pdftotext goo fofi ${LCMS_LIBRARY} ${PNG_LIBRARIES} ${PNG_LINK_FLAGS} Threads::Threads)
install(TARGETS pdftotext RUNTIME DESTINATION bin)
install(FILES ${PROJECT_SOURCE_DIR}/doc/pdftotext.1 DESTINATION man/man1)

#--- pdftohtml

if (HAVE_SPLASH AND PNG_FOUND)
  add_executable(pdftohtml
    $<TARGET_OBJECTS:xpdf_objs>
    HTMLGen.cc
    SplashOutputDev.cc
    TextOutputDev.cc
    pdftohtml.cc
  )
  target_link_libraries(pdftohtml goo fofi splash
                        ${FREETYPE_LIBRARY} ${FREETYPE_OTHER_LIBS}
                        ${DTYPE_LIBRARY}
                        ${LCMS_LIBRARY} ${PNG_LIBRARIES}
			Threads::Threads)
  install(TARGETS pdftohtml RUNTIME DESTINATION bin)
  install(FILES ${PROJECT_SOURCE_DIR}/doc/pdftohtml.1 DESTINATION man/man1)
endif ()

#--- pdfinfo

add_executable(pdfinfo
  $<TARGET_OBJECTS:xpdf_objs>
  pdfinfo.cc
)
target_link_libraries(pdfinfo goo fofi ${LCMS_LIBRARY} Threads::Threads)
install(TARGETS pdfinfo RUNTIME DESTINATION bin)
install(FILES ${PROJECT_SOURCE_DIR}/doc/pdfinfo.1 DESTINATION man/man1)

#--- pdffonts

add_executable(pdffonts
  $<TARGET_OBJECTS:xpdf_objs>
  pdffonts.cc
)
target_link_libraries(pdffonts goo fofi ${LCMS_LIBRARY} Threads::Threads)
install(TARGETS pdffonts RUNTIME DESTINATION bin)
install(FILES ${PROJECT_SOURCE_DIR}/doc/pdffonts.1 DESTINATION man/man1)

#--- pdfdetach

add_executable(pdfdetach
  $<TARGET_OBJECTS:xpdf_objs>
  pdfdetach.cc
)
target_link_libraries(pdfdetach goo fofi ${LCMS_LIBRARY} Threads::Threads)
install(TARGETS pdfdetach RUNTIME DESTINATION bin)
install(FILES ${PROJECT_SOURCE_DIR}/doc/pdfdetach.1 DESTINATION man/man1)

#--- pdftoppm

if (HAVE_SPLASH)
  add_executable(pdftoppm
    $<TARGET_OBJECTS:xpdf_objs>
    SplashOutputDev.cc
    pdftoppm.cc
  )
  target_link_libraries(pdftoppm goo fofi splash
                        ${FREETYPE_LIBRARY} ${FREETYPE_OTHER_LIBS}
                        ${DTYPE_LIBRARY}
                        ${LCMS_LIBRARY}
			Threads::Threads)
  install(TARGETS pdftoppm RUNTIME DESTINATION bin)
  install(FILES ${PROJECT_SOURCE_DIR}/doc/pdftoppm.1 DESTINATION man/man1)
endif ()

#--- pdftopng

if (HAVE_SPLASH AND PNG_FOUND)
  add_executable(pdftopng
    $<TARGET_OBJECTS:xpdf_objs>
    SplashOutputDev.cc
    pdftopng.cc
  )
  target_link_libraries(pdftopng goo fofi splash
                        ${FREETYPE_LIBRARY} ${FREETYPE_OTHER_LIBS}
                        ${DTYPE_LIBRARY}
                        ${LCMS_LIBRARY} ${PNG_LIBRARIES} Threads::Threads)
  install(TARGETS pdftopng RUNTIME DESTINATION bin)
  install(FILES ${PROJECT_SOURCE_DIR}/doc/pdftopng.1 DESTINATION man/man1)
endif ()

#--- pdfimages

add_executable(pdfimages
  $<TARGET_OBJECTS:xpdf_objs>
  ImageOutputDev.cc
  pdfimages.cc
)
target_link_libraries(pdfimages goo fofi ${LCMS_LIBRARY} Threads::Threads)
install(TARGETS pdfimages RUNTIME DESTINATION bin)
install(FILES ${PROJECT_SOURCE_DIR}/doc/pdfimages.1 DESTINATION man/man1)

#--- xpdfrc man page

install(FILES ${PROJECT_SOURCE_DIR}/doc/xpdfrc.5 DESTINATION man/man5)