cmake_minimum_required(VERSION 3.16.0)
project(reminecraftpe-sdl)

# SDL Build
target_compile_definitions(reminecraftpe-core
    PUBLIC USE_SDL
    PUBLIC HANDLE_CHARS_SEPARATELY
)

# Build
set(SOURCES
    main.cpp
    base/AppPlatform_sdl_base.cpp
)
if(EMSCRIPTEN)
    list(APPEND SOURCES emscripten/AppPlatform_sdl.cpp)
else()
    list(APPEND SOURCES desktop/AppPlatform_sdl.cpp)
endif()
if(ANDROID)
    add_library(reminecraftpe SHARED ${SOURCES})
    set_target_properties(reminecraftpe PROPERTIES OUTPUT_NAME main)
else()
    add_executable(reminecraftpe ${SOURCES})
endif()

# Core
target_link_libraries(reminecraftpe reminecraftpe-core)

# stb_image (If Needed)
if(NOT EMSCRIPTEN)
    target_link_libraries(reminecraftpe stb_image)
endif()

# SDL
add_library(SDL INTERFACE)
if(ANDROID OR MCPE_WIN32)
    # Use Vendored SDL2 (Only For Android)
    add_subdirectory(../../thirdparty/SDL2/src SDL EXCLUDE_FROM_ALL)
    target_link_libraries(SDL INTERFACE SDL2::SDL2)
elseif(EMSCRIPTEN)
    # Use Emscripten's SDL2
    set(SDL_FLAG -sUSE_SDL=2)
    target_compile_options(SDL INTERFACE "${SDL_FLAG}")
    target_link_options(SDL INTERFACE "${SDL_FLAG}")
else()
    # Use System SDL2
    find_package(SDL2 REQUIRED)
    target_link_libraries(SDL INTERFACE SDL2::SDL2)
endif()
target_link_libraries(reminecraftpe-core PUBLIC SDL)
if(TARGET SDL2::SDL2main)
    target_link_libraries(reminecraftpe SDL2::SDL2main)
endif()

# OpenGL
if(ANDROID)
    find_library(GLES_LIB GLESv1_CM REQUIRED)
    target_link_libraries(reminecraftpe-core PUBLIC "${GLES_LIB}")
    target_compile_definitions(reminecraftpe-core PUBLIC USE_GLES)
else()
    find_package(OpenGL REQUIRED)
    target_link_libraries(reminecraftpe-core PUBLIC OpenGL::GL)
    if(EMSCRIPTEN)
        # Use WebGL 2
        target_link_options(reminecraftpe-core PUBLIC
            -sMIN_WEBGL_VERSION=2 -sMAX_WEBGL_VERSION=2
            -sLEGACY_GL_EMULATION -sGL_FFP_ONLY
        )
    endif()
endif()

# WASM
if(EMSCRIPTEN)
    # Export Resize Function
    target_link_options(reminecraftpe PRIVATE -sEXPORTED_FUNCTIONS=_main,_resize_from_js -sEXPORTED_RUNTIME_METHODS=ccall)
endif()