Core/AppFilesystemComponent: Add support for default resource parameters
This commit is contained in:
SirLynix
@@ -4,68 +4,153 @@
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#include <Nazara/Core/AppFilesystemComponent.hpp>
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#include <Nazara/Core/Error.hpp>
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#include <Nazara/Core/ResourceRegistry.hpp>
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#include <stdexcept>
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#include <Nazara/Core/Debug.hpp>
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namespace Nz
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{
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template<typename T, typename... Args>
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std::shared_ptr<T> AppFilesystemComponent::GetOrLoad(std::string_view assetPath, Args&&... args)
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namespace Detail
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{
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std::shared_ptr<T> resource;
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for (const VirtualDirectoryPtr& virtualDir : m_virtualDirectories)
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{
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auto callback = [&](const VirtualDirectory::Entry& entry)
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{
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return std::visit([&](auto&& arg)
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{
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using Param = std::decay_t<decltype(arg)>;
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if constexpr (std::is_base_of_v<VirtualDirectory::DirectoryEntry, Param>)
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{
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NazaraError(std::string(assetPath) + " is a directory");
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return false;
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}
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else if constexpr (std::is_same_v<Param, VirtualDirectory::DataPointerEntry>)
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{
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resource = T::LoadFromMemory(arg.data, arg.size, std::forward<Args>(args)...);
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return true;
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}
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else if constexpr (std::is_same_v<Param, VirtualDirectory::FileContentEntry>)
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{
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resource = T::LoadFromMemory(&arg.data[0], arg.data.size(), std::forward<Args>(args)...);
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return true;
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}
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else if constexpr (std::is_same_v<Param, VirtualDirectory::PhysicalFileEntry>)
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{
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resource = T::LoadFromFile(arg.filePath, std::forward<Args>(args)...);
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return true;
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}
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else
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static_assert(AlwaysFalse<Param>(), "unhandled case");
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}, entry);
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};
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template<typename, typename = void>
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struct ResourceParameterHasMerge : std::false_type {};
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if (virtualDir->GetEntry(assetPath, callback) && resource)
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return resource;
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template<typename T>
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struct ResourceParameterHasMerge<T, std::void_t<decltype(std::declval<T>().Merge(std::declval<T>()))>> : std::true_type {};
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}
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inline AppFilesystemComponent::AppFilesystemComponent(ApplicationBase& app) :
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ApplicationComponent(app)
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{
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RegisterResourceTypes();
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}
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template<typename T>
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const typename T::Params* AppFilesystemComponent::GetDefaultResourceParameters() const
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{
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std::size_t resourceIndex = ResourceRegistry<T>::GetResourceId();
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if (resourceIndex >= m_defaultParameters.size())
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return nullptr;
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return static_cast<const typename T::Params*>(m_defaultParameters[resourceIndex].get());
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}
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template<typename T>
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std::shared_ptr<T> AppFilesystemComponent::GetOrLoad(std::string_view assetPath)
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{
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return GetOrLoad<T>(assetPath, typename T::Params{});
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}
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template<typename T>
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std::shared_ptr<T> AppFilesystemComponent::GetOrLoad(std::string_view assetPath, typename T::Params params)
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{
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if constexpr (Detail::ResourceParameterHasMerge<typename T::Params>::value)
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{
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if (const auto* defaultParams = GetDefaultResourceParameters<T>())
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params.Merge(*defaultParams);
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}
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return GetOrLoadImpl<T>(assetPath, params);
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}
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inline const VirtualDirectoryPtr& AppFilesystemComponent::Mount(std::string_view name, std::filesystem::path filepath)
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{
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return Mount(name, std::make_shared<VirtualDirectory>(std::move(filepath)));
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}
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inline const VirtualDirectoryPtr& AppFilesystemComponent::Mount(std::string_view name, VirtualDirectoryPtr directory)
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{
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if (name.empty())
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{
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m_rootDirectory = std::move(directory);
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return m_rootDirectory;
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}
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if (!m_rootDirectory)
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m_rootDirectory = std::make_shared<VirtualDirectory>();
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return m_rootDirectory->StoreDirectory(name, std::move(directory)).directory;
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}
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template<typename T>
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void AppFilesystemComponent::SetDefaultResourceParameters(typename T::Params params)
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{
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std::size_t resourceIndex = ResourceRegistry<T>::GetResourceId();
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if (resourceIndex >= m_defaultParameters.size())
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m_defaultParameters.resize(resourceIndex + 1);
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m_defaultParameters[resourceIndex] = std::make_unique<typename T::Params>(std::move(params));
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}
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template<typename T>
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std::shared_ptr<T> AppFilesystemComponent::GetOrLoadImpl(std::string_view assetPath, const typename T::Params& params)
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{
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std::shared_ptr<T> resource;
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if (!m_rootDirectory)
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return resource;
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auto callback = [&](const VirtualDirectory::Entry& entry)
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{
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return std::visit([&](auto&& arg)
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{
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using Param = std::decay_t<decltype(arg)>;
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if constexpr (std::is_base_of_v<VirtualDirectory::DirectoryEntry, Param>)
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{
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NazaraError(std::string(assetPath) + " is a directory");
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return false;
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}
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else if constexpr (std::is_same_v<Param, VirtualDirectory::DataPointerEntry>)
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{
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resource = T::LoadFromMemory(arg.data, arg.size, params);
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return true;
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}
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else if constexpr (std::is_same_v<Param, VirtualDirectory::FileContentEntry>)
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{
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resource = T::LoadFromMemory(&arg.data[0], arg.data.size(), params);
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return true;
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}
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else if constexpr (std::is_same_v<Param, VirtualDirectory::PhysicalFileEntry>)
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{
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resource = T::LoadFromFile(arg.filePath, params);
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return true;
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}
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else
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static_assert(AlwaysFalse<Param>(), "unhandled case");
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}, entry);
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};
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m_rootDirectory->GetEntry(assetPath, callback);
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return resource;
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}
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inline const VirtualDirectoryPtr& AppFilesystemComponent::RegisterPath(std::filesystem::path filepath)
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inline void AppFilesystemComponent::RegisterResourceTypes()
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{
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return RegisterVirtualDirectory(std::make_shared<VirtualDirectory>(std::move(filepath)));
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}
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if (ResourceRegistry<Font>::GetResourceId() != 0)
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throw std::runtime_error("Font has wrong resource index, please initialize AppFilesystemComponent before using ResourceRegistry");
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inline const VirtualDirectoryPtr& AppFilesystemComponent::RegisterVirtualDirectory(VirtualDirectoryPtr directory)
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{
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return m_virtualDirectories.emplace_back(std::move(directory));
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}
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if (ResourceRegistry<Image>::GetResourceId() != 1)
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throw std::runtime_error("Image has wrong resource index, please initialize AppFilesystemComponent before using ResourceRegistry");
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inline void AppFilesystemComponent::UnregisterVirtualDirectory(const VirtualDirectoryPtr& directory)
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{
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auto it = std::find(m_virtualDirectories.begin(), m_virtualDirectories.end(), directory);
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if (it == m_virtualDirectories.end())
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m_virtualDirectories.erase(it);
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if (ResourceRegistry<ImageStream>::GetResourceId() != 2)
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throw std::runtime_error("ImageStream has wrong resource index, please initialize AppFilesystemComponent before using ResourceRegistry");
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if (ResourceRegistry<Material>::GetResourceId() != 3)
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throw std::runtime_error("Material has wrong resource index, please initialize AppFilesystemComponent before using ResourceRegistry");
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if (ResourceRegistry<MaterialInstance>::GetResourceId() != 4)
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throw std::runtime_error("MaterialInstance has wrong resource index, please initialize AppFilesystemComponent before using ResourceRegistry");
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if (ResourceRegistry<Mesh>::GetResourceId() != 5)
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throw std::runtime_error("Mesh has wrong resource index, please initialize AppFilesystemComponent before using ResourceRegistry");
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if (ResourceRegistry<SoundBuffer>::GetResourceId() != 6)
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throw std::runtime_error("SoundBuffer has wrong resource index, please initialize AppFilesystemComponent before using ResourceRegistry");
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if (ResourceRegistry<SoundStream>::GetResourceId() != 7)
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throw std::runtime_error("SoundStream has wrong resource index, please initialize AppFilesystemComponent before using ResourceRegistry");
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if (ResourceRegistry<Texture>::GetResourceId() != 8)
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throw std::runtime_error("Texture has wrong resource index, please initialize AppFilesystemComponent before using ResourceRegistry");
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}
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}
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