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Loading screen that preloads the entire game based on what's in the "PreloadResources" file. The file is filled automatically with resources that are hot-loaded to make the next launch load more complete.

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This commit is contained in:
sippeangelo
2015-10-22 14:51:34 +02:00
parent 17c30ff610
commit d0ee438c4c
8 changed files with 189 additions and 151 deletions
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include/Core/ResourceManager.h
+25 -82
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@@ -22,7 +22,9 @@
#include <string>
#include <functional>
#include <vector>
#include <set>
#include <unordered_map>
#include <fstream>
#include "Util/UnorderedMapPair.h"
#include "Util/Factory.h"
@@ -70,13 +72,8 @@ public:
return s;
}*/
/** Registers the factory function of a resource type
@tparam T Resource type.
@param factoryFunction Lambda function that creates a new instance of the resource.
*/
template <typename T>
static void RegisterType(std::function<Resource*(std::string)> factoryFunction);
static void RegisterType(std::string typeName);
/** Preloads a resource and caches it for future use
@@ -85,6 +82,7 @@ public:
*/
template <typename T>
static void Preload(std::string resourceName);
static void Preload(std::string resourceType, std::string resourceName);
/** Checks if a resource is in cache
@@ -101,14 +99,7 @@ public:
*/
template <typename T>
static T* Load(std::string resourceName, Resource* parent = nullptr);
/** Fetches a loaded resource
@tparam T Resource type.
@param resourceName Fully qualified name of the resource to fetch.
*/
template <typename T>
static T* Fetch(std::string resourceName);
static Resource* Load(std::string resourceType, std::string resourceName, Resource* parent = nullptr);
/** Reloads an already loaded resource, keeping its resource ID intact.
@@ -116,14 +107,19 @@ public:
@param resourceName Fully qualified name of the resource to reload.
*/
static void Reload(std::string resourceName);
static void LoadPreloadsFromFile();
static const std::set<std::pair<std::string, std::string>>& GetPreloads() { return m_Preloads; }
static void Update();
private:
static std::unordered_map<std::string, std::string> m_CompilerTypenameToResourceType;
static std::unordered_map<std::string, std::function<Resource*(std::string)>> m_FactoryFunctions; // type -> factory function
static std::unordered_map<std::pair<std::string, std::string>, Resource*> m_ResourceCache; // (type, name) -> resource
static std::unordered_map<std::string, Resource*> m_ResourceFromName; // name -> resource
static std::unordered_map<Resource*, Resource*> m_ResourceParents; // resource -> parent resource
static std::set<std::pair<std::string, std::string>> m_Preloads; // (type, name)
// TODO: Getters for IDs
static unsigned int m_CurrentResourceTypeID;
@@ -140,93 +136,40 @@ private:
static unsigned int GetNewResourceID(unsigned int typeID);
// Internal: Create a resource and cache it
template <typename T>
static T* CreateResource(std::string resourceName, Resource* parent);
static Resource* CreateResource(std::string resourceType, std::string resourceName, Resource* parent);
};
template <typename T>
T* ResourceManager::Load(std::string resourceName, Resource* parent /* = nullptr */)
{
auto resourceType = typeid(T).name();
auto it = m_ResourceCache.find(std::make_pair(resourceType, resourceName));
if (it != m_ResourceCache.end())
return static_cast<T*>(it->second);
if (m_Preloading) {
LOG_INFO("Preloading resource \"%s\"", resourceName.c_str());
} else {
LOG_WARNING("Hot-loading resource \"%s\"", resourceName.c_str());
}
return CreateResource<T>(resourceName, parent);
}
template <typename T>
T* ResourceManager::Fetch(std::string resourceName)
{
auto resourceType = typeid(T).name();
auto it = m_ResourceCache.find(std::make_pair(resourceType, resourceName));
if (it == m_ResourceCache.end())
{
LOG_ERROR("Failed to fetch resource \"%s\": Resource not loaded!", resourceName.c_str());
auto resourceTypename = typeid(T).name();
auto it = m_CompilerTypenameToResourceType.find(resourceTypename);
if (it == m_CompilerTypenameToResourceType.end()) {
LOG_ERROR("Failed to load resource \"%s\" of type \"%s\": type not registered", resourceName.c_str(), resourceTypename);
return nullptr;
} else
{
return static_cast<T*>(it->second);
}
return static_cast<T*>(Load(it->second, resourceName, parent));
}
template <typename T>
void ResourceManager::RegisterType(std::function<Resource*(std::string)> factoryFunction)
void ResourceManager::RegisterType(std::string typeName)
{
m_FactoryFunctions[typeid(T).name()] = factoryFunction;
m_CompilerTypenameToResourceType[typeid(T).name()] = typeName;
m_FactoryFunctions[typeName] = [](std::string resourceName) { return new T(resourceName); };
}
template <typename T>
void ResourceManager::Preload(std::string resourceName)
{
auto resourceType = typeid(T).name();
if (IsResourceLoaded(resourceType, resourceName))
{
LOG_WARNING("Attempted to preload resource \"%s\" multiple times!", resourceName.c_str());
auto resourceTypename = typeid(T).name();
auto it = m_CompilerTypenameToResourceType.find(resourceTypename);
if (it == m_CompilerTypenameToResourceType.end()) {
LOG_ERROR("Failed to load resource \"%s\" of type \"%s\": type not registered", resourceName.c_str(), resourceType);
return;
}
m_Preloading = true;
LOG_INFO("Preloading resource \"%s\"", resourceName.c_str());
CreateResource<T>(resourceName, nullptr);
m_Preloading = false;
}
template <typename T>
T* ResourceManager::CreateResource(std::string resourceName, Resource* parent)
{
const char* resourceType = typeid(T).name();
/*auto facIt = m_FactoryFunctions.find(resourceType);
if (facIt == m_FactoryFunctions.end())
{
LOG_ERROR("Failed to load resource \"%s\" of type \"%s\": Type not registered", resourceName.c_str(), resourceType);
return nullptr;
}*/
// Call the factory function
T* resource = new T(resourceName);
// Store IDs
resource->TypeID = GetTypeID(resourceType);
resource->ResourceID = GetNewResourceID(resource->TypeID);
// Cache
m_ResourceCache[std::make_pair(resourceType, resourceName)] = resource;
m_ResourceFromName[resourceName] = resource;
if (parent != nullptr)
{
m_ResourceParents[resource] = parent;
}
if (!boost::filesystem::is_directory(resourceName))
{
LOG_DEBUG("Adding watch for %s", resourceName.c_str());
m_FileWatcher.AddWatch(resourceName, fileWatcherCallback);
}
return resource;
Preload(it->second, resourceName);
}
}