if (FALSE) # XXX(kitware): VTK handles minimum versions
cmake_minimum_required(VERSION 3.10)
endif ()

project(libharu
    VERSION 2.4.0
    DESCRIPTION "libHaru is a free, cross platform, open source library for generating PDF files."
    LANGUAGES C)

if (UNIX)
    include(GNUInstallDirs)
endif()

# Location where the haru cmake build system first looks for cmake modules
set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/modules)

# =======================================================================
# command line options
# =======================================================================
if (FALSE) # XXX(kitware): hardcode settings
option(BUILD_SHARED_LIBS "Build shared libraries (.dll/.so) instead of static ones (.lib/.a)" ON)
option(LIBHPDF_EXAMPLES "Build libharu examples" OFF)
option(LIBHPDF_DEBUG "Enable HPDF Debug")
option(LIBHPDF_DEBUG_TRACE "Enable HPDF Debug trace")
else ()
set(LIBHPDF_EXAMPLES OFF)
set(LIBHPDF_DEBUG OFF)
set(LIBHPDF_DEBUG_TRACE OFF)
endif ()

# Enable exceptions on linux if required
# (eg if you are using libharu in a C++ environment,
# and you want your error-callback to throw an exception,
# you will need to enable this for the exception to be
# able to throw through the libharu callstack).
if (CMAKE_COMPILER_IS_GNUCC OR ("${CMAKE_C_COMPILER_ID}" STREQUAL "Clang"))
   if (FALSE) # XXX(kitware): hardcode settings
   option (LIBHPDF_ENABLE_EXCEPTIONS "Enable exceptions" NO)
   else ()
   set(LIBHPDF_ENABLE_EXCEPTIONS ON)
   endif ()

   if (LIBHPDF_ENABLE_EXCEPTIONS)
      set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fexceptions")
   endif (LIBHPDF_ENABLE_EXCEPTIONS)
endif ()

if (FALSE) # XXX(kitware): replaced with target_include_directories
include_directories(${PROJECT_SOURCE_DIR}/include)
endif ()

# =======================================================================
# look for headers and libraries
# =======================================================================
if (FALSE)
include(haru)
include(summary)
endif ()

if (FALSE) # XXX(kitware): use VTK's libraries
# check zlib availibility
find_package(ZLIB)
  
# check png availability
find_package(PNG)

# Find math library, sometimes needs to be explicitly linked against
find_library(M_LIB m)
endif ()

# =======================================================================
# configure header files, add compiler flags
# =======================================================================
# add definitions and directories to include
#if(CMAKE_COMPILER_IS_GNUCC)
#  add_definitions("-Wall")
#endif(CMAKE_COMPILER_IS_GNUCC)
if(MSVC_VERSION GREATER 1399)
  add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE)
endif(MSVC_VERSION GREATER 1399)

# Will export symbols to a .lib file on Windows
set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS 1)

# Just set to 1, we'll assume they are always available.
# If not, then someone will have to add some tests in here to correctly determine
# the headers existence.
set (LIBHPDF_STDC_HEADERS 1)

if (FALSE) # XXX(kitware): hardcode settings
# support all of the different variations of LIBPNG defines in HARU
set (LIBHPDF_HAVE_LIBPNG ${PNG_FOUND})

# support different zlib defines
set (LIBHPDF_HAVE_LIBZ ${ZLIB_FOUND})
else ()
set(LIBHPDF_HAVE_LIBPNG 1)
set(LIBHPDF_HAVE_LIBZ 1)
endif ()

# create hpdf_config.h
configure_file(
  ${PROJECT_SOURCE_DIR}/include/hpdf_config.h.cmake
  ${PROJECT_BINARY_DIR}/include/hpdf_config.h
)
if (FALSE) # XXX(kitware): replaced with target_include_directories
include_directories(${PROJECT_BINARY_DIR}/include)
endif ()

# =======================================================================
# create library and demos
# =======================================================================
add_subdirectory(src)
if(LIBHPDF_EXAMPLES)
    add_subdirectory(demo)
endif(LIBHPDF_EXAMPLES)

# =======================================================================
# installation configuration
# =======================================================================
set(
  haru_HDRS
    include/hpdf.h
    include/hpdf_types.h
    include/hpdf_consts.h 
    include/hpdf_version.h
    include/hpdf_annotation.h
    include/hpdf_catalog.h
    include/hpdf_conf.h
    include/hpdf_destination.h
    include/hpdf_doc.h
    include/hpdf_encoder.h
    include/hpdf_encrypt.h
    include/hpdf_encryptdict.h
    include/hpdf_error.h
    include/hpdf_ext_gstate.h
    include/hpdf_font.h
    include/hpdf_fontdef.h
    include/hpdf_gstate.h
    include/hpdf_image.h
    include/hpdf_info.h
    include/hpdf_list.h
    include/hpdf_mmgr.h
    include/hpdf_objects.h
    include/hpdf_outline.h
    include/hpdf_pages.h
    include/hpdf_page_label.h
    include/hpdf_streams.h
    include/hpdf_u3d.h
    include/hpdf_utils.h
    include/hpdf_pdfa.h
    include/hpdf_3dmeasure.h
    include/hpdf_exdata.h
    include/vtk_haru_mangle.h
    ${PROJECT_BINARY_DIR}/include/hpdf_config.h
)

vtk_module_install_headers(
  FILES   ${haru_HDRS}
  SUBDIR  "vtklibharu/include")

# install header files
if (FALSE) # XXX(kitware): VTK handles installation
install(FILES ${haru_HDRS} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})

# install various files
install(FILES README.md CHANGES INSTALL DESTINATION .)
install(DIRECTORY bindings DESTINATION .)
endif ()

# =======================================================================
# print out some information
# =======================================================================
if (FALSE) # XXX(kitware): suppress extra messages.
summary()
endif ()