mtgodot-poc/extension/CMakeLists.txt

# mtgodot GDExtension — registers Metin2Model / Metin2AnimPlayer, links libgr2.
# libgr2 is added at the top-level CMakeLists (vendored under ../libgr2), so here
# we just consume the xrender::libgr2 target.

# --- godot-cpp (submodule pinned at 101ae38034304346a46ea9ea84ae156d3e860496) ---
# The parent gitlink is the source-of-truth; .gitmodules intentionally has no
# moving branch. The selected bundle targets Godot 4.7's extension API.
set(GODOTCPP_API_VERSION "4.7" CACHE STRING "Target Godot API version" FORCE)
add_subdirectory(godot-cpp)

# --- vendored native deps: libsodium / libzstd / miniLZO ---
# Built from source (pinned submodules + vendored miniLZO) so the same tree
# compiles on the Android NDK and iOS SDK, which have no Homebrew. Exposes the
# aliases mt3p::sodium / mt3p::zstd / mt3p::minilzo. See docs/THIRD-PARTY.md.
add_subdirectory(third_party)

# --- mtnet: Metin2 net protocol core (no godot-cpp dep; libsodium only) ---
add_library(mtnet STATIC
    src/net/secure_cipher.cpp
    src/net/net_stream.cpp
    src/net/entity_store.cpp
    src/net/mark_image.cpp
)
target_include_directories(mtnet PUBLIC src/net)
target_link_libraries(mtnet PUBLIC mt3p::sodium mt3p::minilzo)
target_compile_features(mtnet PUBLIC cxx_std_20)

# --- mtpack: m2dev-fork asset pack reader/writer (libsodium + zstd) ---
add_library(mtpack STATIC
    src/pack/eterpack.cpp
    src/pack/pack_mount.cpp
    src/pack/asset_source.cpp
)
target_include_directories(mtpack PUBLIC src/pack)
target_link_libraries(mtpack PUBLIC mt3p::sodium mt3p::zstd xrender::formats)
target_compile_features(mtpack PUBLIC cxx_std_20)

# --- mtproto: item_proto / mob_proto reader (libsodium + LZO) ---
add_library(mtproto STATIC src/proto/proto.cpp)
target_include_directories(mtproto PUBLIC src/proto)
target_link_libraries(mtproto PUBLIC mt3p::sodium mt3p::minilzo)
target_compile_features(mtproto PUBLIC cxx_std_20)

# Host-only CLIs + tests: they run on the build machine, so skip them entirely
# when cross-compiling the extension for a device.
set(MT_HOST_BUILD FALSE)
if(CMAKE_SYSTEM_NAME STREQUAL CMAKE_HOST_SYSTEM_NAME)
    set(MT_HOST_BUILD TRUE)
endif()

if(MT_HOST_BUILD)
    add_executable(packtool tools/packtool.cpp)
    target_link_libraries(packtool PRIVATE mtpack)

    # net_probe: connect to an auth server, run the handshake + CG_LOGIN3, report.
    add_executable(net_probe tools/net_probe.cpp)
    target_link_libraries(net_probe PRIVATE mtnet)

    # net_e2e: full auth -> game -> char list -> select -> PHASE_GAME against a
    # real server; dumps entities / points / inventory. Live integration check.
    add_executable(net_e2e tools/net_e2e.cpp)
    target_link_libraries(net_e2e PRIVATE mtnet)
endif()

if(BUILD_TESTING AND MT_HOST_BUILD)
    add_executable(net_cipher_test tests/net_cipher_test.cpp)
    target_link_libraries(net_cipher_test PRIVATE mtnet)
    add_test(NAME net.cipher_roundtrip COMMAND net_cipher_test)

    add_executable(net_loopback_test tests/net_loopback_test.cpp)
    target_link_libraries(net_loopback_test PRIVATE mtnet)
    add_test(NAME net.loopback_flow COMMAND net_loopback_test)

    add_executable(net_entity_test tests/net_entity_test.cpp)
    target_link_libraries(net_entity_test PRIVATE mtnet)
    add_test(NAME net.entity_store COMMAND net_entity_test)

    add_executable(net_mark_test tests/net_mark_test.cpp)
    target_link_libraries(net_mark_test PRIVATE mtnet mt3p::minilzo)
    add_test(NAME net.guild_mark COMMAND net_mark_test)

    add_executable(pack_roundtrip_test tests/pack_roundtrip_test.cpp)
    target_link_libraries(pack_roundtrip_test PRIVATE mtpack)
    add_test(NAME pack.roundtrip COMMAND pack_roundtrip_test)

    add_executable(proto_test tests/proto_test.cpp)
    target_link_libraries(proto_test PRIVATE mtproto)
    add_test(NAME proto.item_mob COMMAND proto_test)
    if(DEFINED ENV{M2_ASSETS})
        set_tests_properties(proto.item_mob PROPERTIES ENVIRONMENT "M2_ASSETS=$ENV{M2_ASSETS}")
    endif()
endif()

# --- the extension library ---
# macOS/Android: SHARED (Godot dlopen()s it). iOS: STATIC — the platform forbids
# loading dynamic libraries, so the archive is linked into the app at export time
# (see docs/PLATFORMS.md for the remaining F1 export/sign steps).
if(CMAKE_SYSTEM_NAME STREQUAL "iOS")
    set(MT_LIB_KIND STATIC)
    set(MT_PLAT_TAG "ios")
elseif(CMAKE_SYSTEM_NAME STREQUAL "Android")
    set(MT_LIB_KIND SHARED)
    set(MT_PLAT_TAG "android")
else()
    set(MT_LIB_KIND SHARED)
    set(MT_PLAT_TAG "macos")
endif()

add_library(mtgodot ${MT_LIB_KIND}
    src/register_types.cpp
    src/metin2_model.cpp
    src/metin2_anim.cpp
    src/metin2_world.cpp
    src/terrain_splat.cpp
    src/static_object.cpp
    src/tree_placeholder.cpp
    src/environment_builder.cpp
    src/water_builder.cpp
    src/gr2_bridge.cpp
    src/m2_material.cpp
    src/dxt.cpp
    src/asset_io.cpp
    src/texture_util.cpp
    src/net/m2_client.cpp
    src/proto/proto_node.cpp
)
target_compile_features(mtgodot PRIVATE cxx_std_20)
target_link_libraries(mtgodot PRIVATE godot::cpp xrender::libgr2 xrender::formats mtnet mtproto)

# Godot's .gdextension expects, per platform:
#   project/bin/libmtgodot.macos.template_{debug,release}.dylib
#   project/bin/libmtgodot.ios.template_{debug,release}.a
#   project/bin/libmtgodot.android.template_{debug,release}.<arch>.so
set(MT_CFG_TAG "$<IF:$<CONFIG:Release>,template_release,template_debug>")
if(CMAKE_SYSTEM_NAME STREQUAL "Android")
    # godot_arch_name-style suffix; OnePlus 13 = arm64.
    set(MT_ARCH_SUFFIX ".${CMAKE_ANDROID_ARCH_ABI}")
    string(REPLACE "arm64-v8a" "arm64" MT_ARCH_SUFFIX "${MT_ARCH_SUFFIX}")
else()
    set(MT_ARCH_SUFFIX "")
endif()
set_target_properties(mtgodot PROPERTIES
    PREFIX "lib"
    OUTPUT_NAME "mtgodot.${MT_PLAT_TAG}.${MT_CFG_TAG}${MT_ARCH_SUFFIX}"
    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/project/bin"
    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/project/bin"
)