mirror of
https://github.com/godotengine/godot
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215 lines
9.6 KiB
C++
215 lines
9.6 KiB
C++
/*************************************************************************/
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/* resource_loader.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef RESOURCE_LOADER_H
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#define RESOURCE_LOADER_H
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#include "core/io/resource.h"
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#include "core/os/semaphore.h"
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#include "core/os/thread.h"
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class ResourceFormatLoader : public Reference {
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GDCLASS(ResourceFormatLoader, Reference);
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public:
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enum CacheMode {
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CACHE_MODE_IGNORE, //resource and subresources do not use path cache, no path is set into resource.
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CACHE_MODE_REUSE, //resource and subresources use patch cache, reuse existing loaded resources instead of loading from disk when available
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CACHE_MODE_REPLACE, //resource and and subresource use path cache, but replace existing loaded resources when available with information from disk
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};
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protected:
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static void _bind_methods();
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public:
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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);
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virtual bool exists(const String &p_path) const;
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virtual void get_recognized_extensions(List<String> *p_extensions) const;
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virtual void get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions) const;
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virtual bool recognize_path(const String &p_path, const String &p_for_type = String()) const;
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virtual bool handles_type(const String &p_type) const;
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virtual String get_resource_type(const String &p_path) const;
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virtual void get_dependencies(const String &p_path, List<String> *p_dependencies, bool p_add_types = false);
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virtual Error rename_dependencies(const String &p_path, const Map<String, String> &p_map);
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virtual bool is_import_valid(const String &p_path) const { return true; }
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virtual bool is_imported(const String &p_path) const { return false; }
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virtual int get_import_order(const String &p_path) const { return 0; }
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virtual String get_import_group_file(const String &p_path) const { return ""; } //no group
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virtual ~ResourceFormatLoader() {}
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};
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VARIANT_ENUM_CAST(ResourceFormatLoader::CacheMode)
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typedef void (*ResourceLoadErrorNotify)(void *p_ud, const String &p_text);
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typedef void (*DependencyErrorNotify)(void *p_ud, const String &p_loading, const String &p_which, const String &p_type);
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typedef Error (*ResourceLoaderImport)(const String &p_path);
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typedef void (*ResourceLoadedCallback)(RES p_resource, const String &p_path);
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class ResourceLoader {
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enum {
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MAX_LOADERS = 64
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};
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public:
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enum ThreadLoadStatus {
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THREAD_LOAD_INVALID_RESOURCE,
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THREAD_LOAD_IN_PROGRESS,
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THREAD_LOAD_FAILED,
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THREAD_LOAD_LOADED
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};
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private:
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static Ref<ResourceFormatLoader> loader[MAX_LOADERS];
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static int loader_count;
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static bool timestamp_on_load;
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static void *err_notify_ud;
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static ResourceLoadErrorNotify err_notify;
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static void *dep_err_notify_ud;
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static DependencyErrorNotify dep_err_notify;
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static bool abort_on_missing_resource;
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static HashMap<String, Vector<String>> translation_remaps;
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static HashMap<String, String> path_remaps;
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static String _path_remap(const String &p_path, bool *r_translation_remapped = nullptr);
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friend class Resource;
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static SelfList<Resource>::List remapped_list;
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friend class ResourceFormatImporter;
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friend class ResourceInteractiveLoader;
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//internal load function
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static RES _load(const String &p_path, const String &p_original_path, const String &p_type_hint, ResourceFormatLoader::CacheMode p_cache_mode, Error *r_error, bool p_use_sub_threads, float *r_progress);
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static ResourceLoadedCallback _loaded_callback;
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static Ref<ResourceFormatLoader> _find_custom_resource_format_loader(String path);
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struct ThreadLoadTask {
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Thread *thread = nullptr;
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Thread::ID loader_id = 0;
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Semaphore *semaphore = nullptr;
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String local_path;
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String remapped_path;
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String type_hint;
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float progress = 0.0;
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ThreadLoadStatus status = THREAD_LOAD_IN_PROGRESS;
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ResourceFormatLoader::CacheMode cache_mode = ResourceFormatLoader::CACHE_MODE_REUSE;
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Error error = OK;
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RES resource;
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bool xl_remapped = false;
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bool use_sub_threads = false;
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bool start_next = true;
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int requests = 0;
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int poll_requests = 0;
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Set<String> sub_tasks;
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};
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static void _thread_load_function(void *p_userdata);
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static Mutex *thread_load_mutex;
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static HashMap<String, ThreadLoadTask> thread_load_tasks;
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static Semaphore *thread_load_semaphore;
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static int thread_waiting_count;
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static int thread_loading_count;
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static int thread_suspended_count;
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static int thread_load_max;
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static float _dependency_get_progress(const String &p_path);
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public:
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static Error load_threaded_request(const String &p_path, const String &p_type_hint = "", bool p_use_sub_threads = false, ResourceFormatLoader::CacheMode p_cache_mode = ResourceFormatLoader::CACHE_MODE_REUSE, const String &p_source_resource = String());
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static ThreadLoadStatus load_threaded_get_status(const String &p_path, float *r_progress = nullptr);
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static RES load_threaded_get(const String &p_path, Error *r_error = nullptr);
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static RES load(const String &p_path, const String &p_type_hint = "", ResourceFormatLoader::CacheMode p_cache_mode = ResourceFormatLoader::CACHE_MODE_REUSE, Error *r_error = nullptr);
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static bool exists(const String &p_path, const String &p_type_hint = "");
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static void get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions);
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static void add_resource_format_loader(Ref<ResourceFormatLoader> p_format_loader, bool p_at_front = false);
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static void remove_resource_format_loader(Ref<ResourceFormatLoader> p_format_loader);
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static String get_resource_type(const String &p_path);
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static void get_dependencies(const String &p_path, List<String> *p_dependencies, bool p_add_types = false);
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static Error rename_dependencies(const String &p_path, const Map<String, String> &p_map);
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static bool is_import_valid(const String &p_path);
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static String get_import_group_file(const String &p_path);
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static bool is_imported(const String &p_path);
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static int get_import_order(const String &p_path);
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static void set_timestamp_on_load(bool p_timestamp) { timestamp_on_load = p_timestamp; }
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static bool get_timestamp_on_load() { return timestamp_on_load; }
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static void notify_load_error(const String &p_err) {
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if (err_notify) {
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err_notify(err_notify_ud, p_err);
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}
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}
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static void set_error_notify_func(void *p_ud, ResourceLoadErrorNotify p_err_notify) {
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err_notify = p_err_notify;
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err_notify_ud = p_ud;
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}
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static void notify_dependency_error(const String &p_path, const String &p_dependency, const String &p_type) {
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if (dep_err_notify) {
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dep_err_notify(dep_err_notify_ud, p_path, p_dependency, p_type);
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}
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}
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static void set_dependency_error_notify_func(void *p_ud, DependencyErrorNotify p_err_notify) {
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dep_err_notify = p_err_notify;
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dep_err_notify_ud = p_ud;
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}
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static void set_abort_on_missing_resources(bool p_abort) { abort_on_missing_resource = p_abort; }
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static bool get_abort_on_missing_resources() { return abort_on_missing_resource; }
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static String path_remap(const String &p_path);
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static String import_remap(const String &p_path);
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static void load_path_remaps();
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static void clear_path_remaps();
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static void reload_translation_remaps();
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static void load_translation_remaps();
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static void clear_translation_remaps();
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static void set_load_callback(ResourceLoadedCallback p_callback);
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static ResourceLoaderImport import;
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static bool add_custom_resource_format_loader(String script_path);
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static void remove_custom_resource_format_loader(String script_path);
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static void add_custom_loaders();
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static void remove_custom_loaders();
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static void initialize();
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static void finalize();
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};
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#endif // RESOURCE_LOADER_H
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