cmake_minimum_required(VERSION 3.1)
project (lagui)

if (POLICY CMP0072)
    set(OpenGL_GL_PREFERENCE GLVND)
endif()

SET(LAGUI_FONT_CUSTOM_PATH  $ENV{HOME}/.local/share/fonts/lagui CACHE STRING "Where to install lagui fonts")
if (NOT DEFINED ${LAGUI_FONT_CUSTOM_PATH})
    set(LAGUI_FONT_CUSTOM_PATH $ENV{HOME}/.local/share/fonts/lagui)
endif()

SET(LAGUI_USE_GLES false CACHE BOOL "Whether to use GLES in LaGUI")
if(${LAGUI_USE_GLES})
    add_definitions(-DLA_USE_GLES)
endif()

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR})

if(NOT (${LAGUI_ANDROID}))
    find_package(OpenGL REQUIRED)
    find_package(X11 REQUIRED)
    find_package(Freetype REQUIRED)
    find_package(GLEW REQUIRED)
    find_package(LuaJIT)
    find_package(PNG)
endif()

SET(LAGUI_USE_LUAJIT true CACHE BOOL "Whether to use LuaJIT in LaGUI")
if((${LuaJIT_FOUND}) AND (${LAGUI_USE_LUAJIT}))
    add_definitions(-DLA_WITH_LUAJIT)
endif()

SET(LAGUI_USE_PNG true CACHE BOOL "Whether to use PNG in LaGUI")
if(${LAGUI_USE_PNG})
    add_definitions(-DLA_WITH_PNG)
endif()

if(${LAGUI_ANDROID})
    add_definitions(-DLAGUI_ANDROID)
endif()

set(CMAKE_THREAD_PREFER_PTHREAD ON)
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)

add_compile_options("$<$<C_COMPILER_ID:MSVC>:/utf-8>")
add_compile_options("$<$<CXX_COMPILER_ID:MSVC>:/utf-8>")

if((${LAGUI_ANDROID}))
add_compile_options(-fpermissive
    -Wno-error=incompatible-function-pointer-types
    -Wno-error=int-conversion
)
endif()

# embed func
function(embed_resource resource_file_name source_file_name variable_name)
    if(EXISTS "${source_file_name}")
        if("${source_file_name}" IS_NEWER_THAN "${resource_file_name}")
            return()
        endif()
    endif()
    file(READ "${resource_file_name}" hex_content HEX)
    string(REPEAT "[0-9a-f]" 32 pattern)
    string(REGEX REPLACE "(${pattern})" "\\1\n" content "${hex_content}")
    string(REGEX REPLACE "([0-9a-f][0-9a-f])" "0x\\1, " content "${content}")
    string(REGEX REPLACE ", $" "" content "${content}")
    set(array_definition "unsigned char ${variable_name}[] =\n{\n${content}\n};")
    set(source "// Auto generated file.\n${array_definition}\n")
    file(WRITE "${source_file_name}" "${source}")
endfunction()

file(MAKE_DIRECTORY "BuildResources")
embed_resource("resources/soft_proof_table_sRGB.lagui.lut" "BuildResources/soft_proof_table_sRGB.lagui.lut.c" "DATA_LUT_PROOF_SRGB")
embed_resource("resources/soft_proof_table_Clay.lagui.lut" "BuildResources/soft_proof_table_Clay.lagui.lut.c" "DATA_LUT_PROOF_CLAY")
embed_resource("resources/soft_proof_table_D65P3.lagui.lut" "BuildResources/soft_proof_table_D65P3.lagui.lut.c" "DATA_LUT_PROOF_D65P3")

file(GLOB SOURCE_FILES 
	./*.c ./*.cpp ./resources/*.c ./resources/*.cpp BuildResources/*.c)

file(GLOB HEADER_FILES 
	./*.h ./*.hpp ./resources/*.h ./resources/*.hpp BuildResources/*.h)

add_definitions(-DLAGUI_FONT_CUSTOM_PATH=\"${LAGUI_FONT_CUSTOM_PATH}\")
add_definitions(-w)

if(${LAGUI_ANDROID})
    INCLUDE_DIRECTORIES(${PNG_SRC_DIR})
    INCLUDE_DIRECTORIES(${FREETYPE_SRC_DIR}/include)
    INCLUDE_DIRECTORIES(${ANDROID_NDK}/sources/android/native_app_glue)
endif()

include_directories(
	${CMAKE_SOURCE_DIR}
	${X11_INCLUDE_DIR}
	${GLEW_INCLUDE_PATH}
	${GLM_INCLUDE_PATH}
	${FREETYPE_INCLUDE_DIRS}
    lagui
)

if(${LuaJIT_FOUND})
    include_directories(${LUA_INCLUDE_DIR})
endif()
if(${PNG_FOUND})
    include_directories(${LUA_INCLUDE_DIR})
endif()

if(WIN32)
list(APPEND SOURCE_FILES ./wintab/wintab_utils.c)
file(GLOB wintabfiles ./wintab/*.h )
list(APPEND HEADER_FILES ${wintabfiles})
include_directories(wintab)
endif()

list(APPEND SOURCE_FILES ./nanovg/nanovg.c)
file(GLOB nvgfiles ./nanovg/*.h )
list(APPEND HEADER_FILES ${nvgfiles})
include_directories(nanovg)

set(LAGUI_FONTS
    "fonts/NotoEmoji-Regular.ttf"
    "fonts/NotoSansCJK-Regular.ttc"
    "fonts/NotoSansMono-Regular.ttf"
    "fonts/NotoSansSymbols-Regular.ttf"
    "fonts/NotoSansSymbols2-Regular.ttf"
)

add_library(lagui ${HEADER_FILES} ${SOURCE_FILES})

execute_process(
    COMMAND git rev-parse --abbrev-ref HEAD
    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
    OUTPUT_VARIABLE LAGUI_GIT_BRANCH
	OUTPUT_STRIP_TRAILING_WHITESPACE)
	
execute_process(
    COMMAND git rev-parse --short=12 HEAD
    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
    OUTPUT_VARIABLE LAGUI_GIT_HASH
	OUTPUT_STRIP_TRAILING_WHITESPACE)

target_compile_definitions(lagui PRIVATE "-DLAGUI_GIT_BRANCH=\"${LAGUI_GIT_BRANCH}\"")
target_compile_definitions(lagui PRIVATE "-DLAGUI_GIT_HASH=\"${LAGUI_GIT_HASH}\"")

install(FILES ${HEADER_FILES} DESTINATION include/lagui)
install(TARGETS lagui EXPORT lagui-targets DESTINATION lib/lagui)
install(EXPORT lagui-targets DESTINATION lib/lagui)
install(FILES lagui-config.cmake DESTINATION lib/lagui)
install(FILES FindLuaJIT.cmake DESTINATION lib/lagui)
install(FILES ${LAGUI_FONTS} DESTINATION ${LAGUI_FONT_CUSTOM_PATH})