/*************************************************************************/ /* wrapped.hpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #ifndef GODOT_WRAPPED_HPP #define GODOT_WRAPPED_HPP #include #include #include #include namespace godot { typedef void GodotObject; // Base for all engine classes, to contain the pointer to the engine instance. class Wrapped { friend class GDExtensionBinding; friend void postinitialize_handler(Wrapped *); protected: virtual const char *_get_extension_class() const; // This is needed to retrieve the class name before the godot object has its _extension and _extension_instance members assigned. virtual const GDNativeInstanceBindingCallbacks *_get_bindings_callbacks() const = 0; void _notification(int p_what){}; bool _set(const StringName &p_name, const Variant &p_property) { return false; }; bool _get(const StringName &p_name, Variant &r_property) const { return false; }; void _get_property_list(List *p_list) const {}; bool _property_can_revert(const StringName &p_name) const { return false; }; bool _property_get_revert(const StringName &p_name, Variant &r_property) const { return false; }; String _to_string() const { return "[" + String(get_class_static()) + ":" + itos(get_instance_id()) + "]"; } static void notification_bind(GDExtensionClassInstancePtr p_instance, int32_t p_what) {} static GDNativeBool set_bind(GDExtensionClassInstancePtr p_instance, const GDNativeStringNamePtr p_name, const GDNativeVariantPtr p_value) { return false; } static GDNativeBool get_bind(GDExtensionClassInstancePtr p_instance, const GDNativeStringNamePtr p_name, GDNativeVariantPtr r_ret) { return false; } static const GDNativePropertyInfo *get_property_list_bind(GDExtensionClassInstancePtr p_instance, uint32_t *r_count) { return nullptr; } static void free_property_list_bind(GDExtensionClassInstancePtr p_instance, const GDNativePropertyInfo *p_list) {} static GDNativeBool property_can_revert_bind(GDExtensionClassInstancePtr p_instance, const GDNativeStringNamePtr p_name) { return false; } static GDNativeBool property_get_revert_bind(GDExtensionClassInstancePtr p_instance, const GDNativeStringNamePtr p_name, GDNativeVariantPtr r_ret) { return false; } static void to_string_bind(GDExtensionClassInstancePtr p_instance, GDNativeStringPtr r_out) {} GDNativePropertyInfo *plist = nullptr; uint32_t plist_size = 0; void _postinitialize(); Wrapped(const char *p_godot_class); Wrapped(GodotObject *p_godot_object); public: static const char *get_class_static() { return "Wrapped"; } uint64_t get_instance_id() const { return 0; } static _FORCE_INLINE_ char *_alloc_and_copy_cstr(const char *p_str) { size_t size = strlen(p_str) + 1; char *ret = reinterpret_cast(memalloc(size)); memcpy(ret, p_str, size); return ret; } // Must be public but you should not touch this. GodotObject *_owner = nullptr; }; } // namespace godot #define GDCLASS(m_class, m_inherits) \ private: \ void operator=(const m_class &p_rval) {} \ friend class ::godot::ClassDB; \ \ protected: \ virtual const char *_get_extension_class() const override { \ return get_class_static(); \ } \ \ virtual const GDNativeInstanceBindingCallbacks *_get_bindings_callbacks() const override { \ return &___binding_callbacks; \ } \ \ static void (*_get_bind_methods())() { \ return &m_class::_bind_methods; \ } \ \ static void (::godot::Wrapped::*_get_notification())(int) { \ return (void(::godot::Wrapped::*)(int)) & m_class::_notification; \ } \ \ static bool (::godot::Wrapped::*_get_set())(const ::godot::StringName &p_name, const ::godot::Variant &p_property) { \ return (bool(::godot::Wrapped::*)(const ::godot::StringName &p_name, const ::godot::Variant &p_property)) & m_class::_set; \ } \ \ static bool (::godot::Wrapped::*_get_get())(const ::godot::StringName &p_name, ::godot::Variant &r_ret) const { \ return (bool(::godot::Wrapped::*)(const ::godot::StringName &p_name, ::godot::Variant &r_ret) const) & m_class::_get; \ } \ \ static void (::godot::Wrapped::*_get_get_property_list())(::godot::List<::godot::PropertyInfo> * p_list) const { \ return (void(::godot::Wrapped::*)(::godot::List<::godot::PropertyInfo> * p_list) const) & m_class::_get_property_list; \ } \ \ static bool (::godot::Wrapped::*_get_property_can_revert())(const ::godot::StringName &p_name) { \ return (bool(::godot::Wrapped::*)(const ::godot::StringName &p_name)) & m_class::_property_can_revert; \ } \ \ static bool (::godot::Wrapped::*_get_property_get_revert())(const ::godot::StringName &p_name, ::godot::Variant &) { \ return (bool(::godot::Wrapped::*)(const ::godot::StringName &p_name, ::godot::Variant &)) & m_class::_property_get_revert; \ } \ \ static ::godot::String (::godot::Wrapped::*_get_to_string())() { \ return (::godot::String(::godot::Wrapped::*)()) & m_class::_to_string; \ } \ \ template \ static void register_virtuals() { \ m_inherits::register_virtuals(); \ } \ \ public: \ static void initialize_class() { \ static bool initialized = false; \ if (initialized) { \ return; \ } \ m_inherits::initialize_class(); \ if (m_class::_get_bind_methods() != m_inherits::_get_bind_methods()) { \ _bind_methods(); \ m_inherits::register_virtuals(); \ } \ initialized = true; \ } \ \ static const char *get_class_static() { \ return #m_class; \ } \ \ static const char *get_parent_class_static() { \ return m_inherits::get_class_static(); \ } \ \ static GDNativeObjectPtr create(void *data) { \ m_class *new_object = memnew(m_class); \ return new_object->_owner; \ } \ \ static void notification_bind(GDExtensionClassInstancePtr p_instance, int32_t p_what) { \ if (p_instance && m_class::_get_notification()) { \ if (m_class::_get_notification() != m_inherits::_get_notification()) { \ m_class *cls = reinterpret_cast(p_instance); \ return cls->_notification(p_what); \ } \ m_inherits::notification_bind(p_instance, p_what); \ } \ } \ \ static GDNativeBool set_bind(GDExtensionClassInstancePtr p_instance, const GDNativeStringNamePtr p_name, const GDNativeVariantPtr p_value) { \ if (p_instance && m_class::_get_set()) { \ if (m_class::_get_set() != m_inherits::_get_set()) { \ m_class *cls = reinterpret_cast(p_instance); \ return cls->_set(*reinterpret_cast(p_name), *reinterpret_cast(p_value)); \ } \ return m_inherits::set_bind(p_instance, p_name, p_value); \ } \ return false; \ } \ \ static GDNativeBool get_bind(GDExtensionClassInstancePtr p_instance, const GDNativeStringNamePtr p_name, GDNativeVariantPtr r_ret) { \ if (p_instance && m_class::_get_get()) { \ if (m_class::_get_get() != m_inherits::_get_get()) { \ m_class *cls = reinterpret_cast(p_instance); \ return cls->_get(*reinterpret_cast(p_name), *reinterpret_cast<::godot::Variant *>(r_ret)); \ } \ return m_inherits::get_bind(p_instance, p_name, r_ret); \ } \ return false; \ } \ \ static const GDNativePropertyInfo *get_property_list_bind(GDExtensionClassInstancePtr p_instance, uint32_t *r_count) { \ if (p_instance && m_class::_get_get_property_list()) { \ if (m_class::_get_get_property_list() != m_inherits::_get_get_property_list()) { \ m_class *cls = reinterpret_cast(p_instance); \ ::godot::List<::godot::PropertyInfo> list; \ cls->_get_property_list(&list); \ ERR_FAIL_COND_V_MSG(cls->plist != nullptr || cls->plist_size != 0, nullptr, "Internal error, property list was not freed by engine!"); \ cls->plist = reinterpret_cast(memalloc(sizeof(GDNativePropertyInfo) * list.size())); \ cls->plist_size = 0; \ for (const ::godot::PropertyInfo &E : list) { \ cls->plist[cls->plist_size].type = E.type; \ cls->plist[cls->plist_size].name = _alloc_and_copy_cstr(E.name.utf8().get_data()); \ cls->plist[cls->plist_size].hint = E.hint; \ cls->plist[cls->plist_size].hint_string = _alloc_and_copy_cstr(E.hint_string.utf8().get_data()); \ cls->plist[cls->plist_size].class_name = _alloc_and_copy_cstr(E.class_name.utf8().get_data()); \ cls->plist[cls->plist_size].usage = E.usage; \ cls->plist_size++; \ } \ if (r_count) \ *r_count = cls->plist_size; \ return cls->plist; \ } \ return m_inherits::get_property_list_bind(p_instance, r_count); \ } \ return nullptr; \ } \ \ static void free_property_list_bind(GDExtensionClassInstancePtr p_instance, const GDNativePropertyInfo *p_list) { \ if (p_instance) { \ m_class *cls = reinterpret_cast(p_instance); \ ERR_FAIL_COND_MSG(cls->plist == nullptr, "Internal error, property list double free!"); \ for (size_t i = 0; i < cls->plist_size; i++) { \ memfree(const_cast(cls->plist[i].name)); \ memfree(const_cast(cls->plist[i].class_name)); \ memfree(const_cast(cls->plist[i].hint_string)); \ } \ memfree(cls->plist); \ cls->plist = nullptr; \ cls->plist_size = 0; \ } \ } \ \ static GDNativeBool property_can_revert_bind(GDExtensionClassInstancePtr p_instance, const GDNativeStringNamePtr p_name) { \ if (p_instance && m_class::_get_property_can_revert()) { \ if (m_class::_get_property_can_revert() != m_inherits::_get_property_can_revert()) { \ m_class *cls = reinterpret_cast(p_instance); \ return cls->_property_can_revert(*reinterpret_cast(p_name)); \ } \ return m_inherits::property_can_revert_bind(p_instance, p_name); \ } \ return false; \ } \ \ static GDNativeBool property_get_revert_bind(GDExtensionClassInstancePtr p_instance, const GDNativeStringNamePtr p_name, GDNativeVariantPtr r_ret) { \ if (p_instance && m_class::_get_property_get_revert()) { \ if (m_class::_get_property_get_revert() != m_inherits::_get_property_get_revert()) { \ m_class *cls = reinterpret_cast(p_instance); \ return cls->_property_get_revert(*reinterpret_cast(p_name), *reinterpret_cast<::godot::Variant *>(r_ret)); \ } \ return m_inherits::property_get_revert_bind(p_instance, p_name, r_ret); \ } \ return false; \ } \ \ static void to_string_bind(GDExtensionClassInstancePtr p_instance, GDNativeStringPtr r_out) { \ if (p_instance && m_class::_get_to_string()) { \ if (m_class::_get_to_string() != m_inherits::_get_to_string()) { \ m_class *cls = reinterpret_cast(p_instance); \ *reinterpret_cast<::godot::String *>(r_out) = cls->_to_string(); \ return; \ } \ m_inherits::to_string_bind(p_instance, r_out); \ } \ } \ \ static void free(void *data, GDExtensionClassInstancePtr ptr) { \ if (ptr) { \ m_class *cls = reinterpret_cast(ptr); \ cls->~m_class(); \ ::godot::Memory::free_static(cls); \ } \ } \ \ static void *___binding_create_callback(void *p_token, void *p_instance) { \ return nullptr; \ } \ \ static void ___binding_free_callback(void *p_token, void *p_instance, void *p_binding) { \ } \ \ static GDNativeBool ___binding_reference_callback(void *p_token, void *p_instance, GDNativeBool p_reference) { \ return true; \ } \ \ static constexpr GDNativeInstanceBindingCallbacks ___binding_callbacks = { \ ___binding_create_callback, \ ___binding_free_callback, \ ___binding_reference_callback, \ }; // Don't use this for your classes, use GDCLASS() instead. #define GDNATIVE_CLASS(m_class, m_inherits) \ private: \ void operator=(const m_class &p_rval) {} \ \ protected: \ virtual const GDNativeInstanceBindingCallbacks *_get_bindings_callbacks() const override { \ return &___binding_callbacks; \ } \ \ m_class(const char *p_godot_class) : m_inherits(p_godot_class) {} \ m_class(GodotObject *p_godot_object) : m_inherits(p_godot_object) {} \ \ static void (*_get_bind_methods())() { \ return nullptr; \ } \ \ static void (Wrapped::*_get_notification())(int) { \ return nullptr; \ } \ \ static bool (Wrapped::*_get_set())(const StringName &p_name, const Variant &p_property) { \ return nullptr; \ } \ \ static bool (Wrapped::*_get_get())(const StringName &p_name, Variant &r_ret) const { \ return nullptr; \ } \ \ static void (Wrapped::*_get_get_property_list())(List * p_list) const { \ return nullptr; \ } \ \ static bool (Wrapped::*_get_property_can_revert())(const StringName &p_name) { \ return nullptr; \ } \ \ static bool (Wrapped::*_get_property_get_revert())(const StringName &p_name, Variant &) { \ return nullptr; \ } \ \ static String (Wrapped::*_get_to_string())() { \ return nullptr; \ } \ \ public: \ static void initialize_class() {} \ \ static const char *get_class_static() { \ return #m_class; \ } \ \ static const char *get_parent_class_static() { \ return m_inherits::get_class_static(); \ } \ \ static void *___binding_create_callback(void *p_token, void *p_instance) { \ /* Do not call memnew here, we don't want the postinitializer to be called */ \ return new ("") m_class((GodotObject *)p_instance); \ } \ static void ___binding_free_callback(void *p_token, void *p_instance, void *p_binding) { \ /* Explicitly call the deconstructor to ensure proper lifecycle for non-trivial members */ \ reinterpret_cast(p_binding)->~m_class(); \ Memory::free_static(reinterpret_cast(p_binding)); \ } \ static GDNativeBool ___binding_reference_callback(void *p_token, void *p_instance, GDNativeBool p_reference) { \ return true; \ } \ static constexpr GDNativeInstanceBindingCallbacks ___binding_callbacks = { \ ___binding_create_callback, \ ___binding_free_callback, \ ___binding_reference_callback, \ }; \ m_class() : m_class(#m_class) {} #endif // GODOT_WRAPPED_HPP