💿🐜 Antkeeper source code
https://antkeeper.com
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
236 lines
5.4 KiB
236 lines
5.4 KiB
/*
|
|
* Copyright (C) 2020 Christopher J. Howard
|
|
*
|
|
* This file is part of Antkeeper source code.
|
|
*
|
|
* Antkeeper source code is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Antkeeper source code is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef ANTKEEPER_RESOURCE_MANAGER_HPP
|
|
#define ANTKEEPER_RESOURCE_MANAGER_HPP
|
|
|
|
#include "resource-handle.hpp"
|
|
#include "resource-loader.hpp"
|
|
#include "debug/logger.hpp"
|
|
#include <fstream>
|
|
#include <list>
|
|
#include <map>
|
|
#include <stdexcept>
|
|
#include <string>
|
|
#include <entt/entt.hpp>
|
|
#include <physfs.h>
|
|
|
|
/**
|
|
* Loads resources.
|
|
*/
|
|
class resource_manager
|
|
{
|
|
public:
|
|
/**
|
|
* Creates a resource manager.
|
|
*/
|
|
resource_manager();
|
|
|
|
/**
|
|
* Destroys a resource manager and frees all of its resources.
|
|
*/
|
|
~resource_manager();
|
|
|
|
/**
|
|
* Adds a path to be searched when a resource is requested.
|
|
*
|
|
* @param path Search path.
|
|
*/
|
|
void include(const std::string& path);
|
|
|
|
/**
|
|
* Loads the requested resource. If the resource has already been loaded it will be retrieved from the resource cache and its reference count incremented.
|
|
*
|
|
* @tparam T Resource type.
|
|
* @param path Path to the resource, relative to the search paths.
|
|
* @return Pointer to the requested resource, or nullptr if the resource could not be found nor loaded.
|
|
*/
|
|
template <typename T>
|
|
T* load(const std::string& name);
|
|
|
|
/**
|
|
* Decrements a resource's reference count and unloads the resource if it's unreferenced.
|
|
*
|
|
* @param path Path to the resource, relative to the search paths.
|
|
*/
|
|
void unload(const std::string& name);
|
|
|
|
/**
|
|
* Saves the specified resource.
|
|
*
|
|
* @tparam T Resource type.
|
|
* @param resource Pointer to the resource.
|
|
* @param path Path to the resource.
|
|
*/
|
|
template <typename T>
|
|
void save(const T* resource, const std::string& path);
|
|
|
|
entt::registry& get_archetype_registry();
|
|
|
|
void set_logger(::logger* logger);
|
|
|
|
private:
|
|
std::map<std::string, resource_handle_base*> resource_cache;
|
|
std::list<std::string> search_paths;
|
|
entt::registry archetype_registry;
|
|
::logger* logger;
|
|
};
|
|
|
|
template <typename T>
|
|
T* resource_manager::load(const std::string& name)
|
|
{
|
|
// Check if resource is in the cache
|
|
auto it = resource_cache.find(name);
|
|
if (it != resource_cache.end())
|
|
{
|
|
/*
|
|
if (logger)
|
|
{
|
|
logger->log("Fetched resource \"" + name + "\"");
|
|
}
|
|
*/
|
|
|
|
// Resource found
|
|
resource_handle<T>* resource = static_cast<resource_handle<T>*>(it->second);
|
|
|
|
// Increment resource handle reference count
|
|
++resource->reference_count;
|
|
|
|
// Return resource data
|
|
return resource->data;
|
|
}
|
|
|
|
if (logger)
|
|
{
|
|
logger->push_task("Loading resource \"" + name + "\"");
|
|
}
|
|
|
|
// Resource not cached, look for file in search paths
|
|
T* data = nullptr;
|
|
bool found = false;
|
|
for (const std::string& search_path: search_paths)
|
|
{
|
|
std::string path = search_path + name;
|
|
|
|
// Check if file exists
|
|
if (!PHYSFS_exists(path.c_str()))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
// File found
|
|
found = true;
|
|
|
|
// Open file for reading
|
|
PHYSFS_File* file = PHYSFS_openRead(path.c_str());
|
|
if (!file)
|
|
{
|
|
logger->error(std::string("PhysicsFS error: ") + PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode()));
|
|
break;
|
|
}
|
|
|
|
// Load opened file
|
|
try
|
|
{
|
|
data = resource_loader<T>::load(this, file);
|
|
}
|
|
catch (const std::exception& e)
|
|
{
|
|
logger->error("Failed to load resource: \"" + std::string(e.what()) + "\"");
|
|
}
|
|
|
|
// Close opened file
|
|
if (!PHYSFS_close(file))
|
|
{
|
|
logger->error(std::string("PhysicsFS error: ") + PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode()));
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
if (!data)
|
|
{
|
|
if (!found)
|
|
{
|
|
logger->error("File not found");
|
|
}
|
|
|
|
logger->pop_task(EXIT_FAILURE);
|
|
return nullptr;
|
|
}
|
|
|
|
// Create a resource handle for the resource data
|
|
resource_handle<T>* resource = new resource_handle<T>();
|
|
resource->data = data;
|
|
resource->reference_count = 1;
|
|
|
|
// Add resource to the cache
|
|
resource_cache[name] = resource;
|
|
|
|
if (logger)
|
|
{
|
|
logger->pop_task(EXIT_SUCCESS);
|
|
}
|
|
|
|
return resource->data;
|
|
}
|
|
|
|
template <typename T>
|
|
void resource_manager::save(const T* resource, const std::string& path)
|
|
{
|
|
logger->push_task("Saving resource to \"" + path + "\"");
|
|
|
|
// Open file for writing
|
|
PHYSFS_File* file = PHYSFS_openWrite(path.c_str());
|
|
if (!file)
|
|
{
|
|
logger->error(std::string("PhysicsFS error: ") + PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode()));
|
|
logger->pop_task(EXIT_FAILURE);
|
|
return;
|
|
}
|
|
|
|
// Save to opened file
|
|
int status = EXIT_SUCCESS;
|
|
try
|
|
{
|
|
resource_loader<T>::save(this, file, resource);
|
|
}
|
|
catch (const std::exception& e)
|
|
{
|
|
logger->error("Failed to save resource: \"" + std::string(e.what()) + "\"");
|
|
status = EXIT_FAILURE;
|
|
}
|
|
|
|
// Close opened file
|
|
if (!PHYSFS_close(file))
|
|
{
|
|
logger->error(std::string("PhysicsFS error: ") + PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode()));
|
|
status = EXIT_FAILURE;
|
|
}
|
|
|
|
logger->pop_task(status)
|
|
}
|
|
|
|
inline entt::registry& resource_manager::get_archetype_registry()
|
|
{
|
|
return archetype_registry;
|
|
}
|
|
|
|
#endif // ANTKEEPER_RESOURCE_MANAGER_HPP
|
|
|