godot/core/io/resource_format_binary.h
reduz 32b43cfeb3 Implement Resource UIDs
* Most resource types now have unique identifiers.
* Applies to text, binary and imported resources.
* File formats reference both by text and UID (when available). UID always has priority.
* Resource UIDs are 64 bits for better compatibility with the engine.
* Can be represented and used textually, example `uuid://dapwmgsmnl28u`.
* A special binary cache file is used and exported, containing the mappings.

Example of how it looks:

```GDScript
[gd_scene load_steps=2 format=3 uid="uid://dw86wq31afig2"]

[ext_resource type="PackedScene" uid="uid://bt36ojelx8q6c" path="res://subscene.scn" id="1_t56hs"]
```

GDScript, shaders and other special resource files can't currently provide UIDs, but this should be doable with special keywords on the files.
This will be reserved for future PRs.
2021-07-24 09:16:52 -03:00

183 lines
6.6 KiB
C++

/*************************************************************************/
/* resource_format_binary.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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 RESOURCE_FORMAT_BINARY_H
#define RESOURCE_FORMAT_BINARY_H
#include "core/io/file_access.h"
#include "core/io/resource_loader.h"
#include "core/io/resource_saver.h"
class ResourceLoaderBinary {
bool translation_remapped = false;
String local_path;
String res_path;
String type;
Ref<Resource> resource;
uint32_t ver_format = 0;
FileAccess *f = nullptr;
uint64_t importmd_ofs = 0;
ResourceUID::ID uid = ResourceUID::INVALID_ID;
Vector<char> str_buf;
List<RES> resource_cache;
Vector<StringName> string_map;
StringName _get_string();
struct ExtResource {
String path;
String type;
ResourceUID::ID uid = ResourceUID::INVALID_ID;
RES cache;
};
bool using_named_scene_ids = false;
bool using_uids = false;
bool use_sub_threads = false;
float *progress = nullptr;
Vector<ExtResource> external_resources;
struct IntResource {
String path;
uint64_t offset;
};
Vector<IntResource> internal_resources;
Map<String, RES> internal_index_cache;
String get_unicode_string();
void _advance_padding(uint32_t p_len);
Map<String, String> remaps;
Error error = OK;
ResourceFormatLoader::CacheMode cache_mode = ResourceFormatLoader::CACHE_MODE_REUSE;
friend class ResourceFormatLoaderBinary;
Error parse_variant(Variant &r_v);
Map<String, RES> dependency_cache;
public:
void set_local_path(const String &p_local_path);
Ref<Resource> get_resource();
Error load();
void set_translation_remapped(bool p_remapped);
void set_remaps(const Map<String, String> &p_remaps) { remaps = p_remaps; }
void open(FileAccess *p_f, bool p_no_resources = false, bool p_keep_uuid_paths = false);
String recognize(FileAccess *p_f);
void get_dependencies(FileAccess *p_f, List<String> *p_dependencies, bool p_add_types);
ResourceLoaderBinary() {}
~ResourceLoaderBinary();
};
class ResourceFormatLoaderBinary : public ResourceFormatLoader {
public:
virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_use_sub_threads = false, float *r_progress = nullptr, CacheMode p_cache_mode = CACHE_MODE_REUSE);
virtual void get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions) const;
virtual void get_recognized_extensions(List<String> *p_extensions) const;
virtual bool handles_type(const String &p_type) const;
virtual String get_resource_type(const String &p_path) const;
virtual ResourceUID::ID get_resource_uid(const String &p_path) const;
virtual void get_dependencies(const String &p_path, List<String> *p_dependencies, bool p_add_types = false);
virtual Error rename_dependencies(const String &p_path, const Map<String, String> &p_map);
};
class ResourceFormatSaverBinaryInstance {
String local_path;
String path;
bool relative_paths;
bool bundle_resources;
bool skip_editor;
bool big_endian;
bool takeover_paths;
FileAccess *f;
String magic;
Set<RES> resource_set;
struct NonPersistentKey { //for resource properties generated on the fly
RES base;
StringName property;
bool operator<(const NonPersistentKey &p_key) const { return base == p_key.base ? property < p_key.property : base < p_key.base; }
};
Map<NonPersistentKey, RES> non_persistent_map;
Map<StringName, int> string_map;
Vector<StringName> strings;
Map<RES, int> external_resources;
List<RES> saved_resources;
struct Property {
int name_idx;
Variant value;
PropertyInfo pi;
};
struct ResourceData {
String type;
List<Property> properties;
};
static void _pad_buffer(FileAccess *f, int p_bytes);
void _find_resources(const Variant &p_variant, bool p_main = false);
static void save_unicode_string(FileAccess *f, const String &p_string, bool p_bit_on_len = false);
int get_string_index(const String &p_string);
public:
enum {
FORMAT_FLAG_NAMED_SCENE_IDS = 1,
FORMAT_FLAG_UIDS = 2,
};
Error save(const String &p_path, const RES &p_resource, uint32_t p_flags = 0);
static void write_variant(FileAccess *f, const Variant &p_property, Map<RES, int> &resource_map, Map<RES, int> &external_resources, Map<StringName, int> &string_map, const PropertyInfo &p_hint = PropertyInfo());
};
class ResourceFormatSaverBinary : public ResourceFormatSaver {
public:
static ResourceFormatSaverBinary *singleton;
virtual Error save(const String &p_path, const RES &p_resource, uint32_t p_flags = 0);
virtual bool recognize(const RES &p_resource) const;
virtual void get_recognized_extensions(const RES &p_resource, List<String> *p_extensions) const;
ResourceFormatSaverBinary();
};
#endif // RESOURCE_FORMAT_BINARY_H