61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
#include <Nazara/Core/ApplicationBase.hpp>
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#include <Nazara/Core/FilesystemAppComponent.hpp>
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#include <Nazara/Core/JsonSerialization.hpp>
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namespace Nz
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{
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template <typename TResource>
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concept IsStreamingResource = requires(TResource)
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{
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{ TResource::OpenFromFile({}) } -> std::same_as<std::shared_ptr<TResource>>;
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};
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template <typename TResource>
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Asset<TResource> Asset<TResource>::LoadFromFile(const std::filesystem::path& path)
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{
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Asset<TResource> asset;
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FilesystemAppComponent* fs = ApplicationBase::Instance()->TryGetComponent<FilesystemAppComponent>();
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if (fs) // first try using a FileSystem component to load the asset
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{
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auto json = fs->Load<JsonSerializationContext>(std::string_view(path.string()));
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if (json)
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{
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if (!Unserialize(*json, "", &asset.m_descriptor))
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return {};
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std::string filepath = asset.m_descriptor.path.string();
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if constexpr (IsStreamingResource<TResource>)
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{
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asset.m_resource = fs->Open<TResource>(std::string_view(filepath), asset.m_descriptor.parameters);
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}
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else
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{
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asset.m_resource = fs->Load<TResource>(std::string_view(filepath), asset.m_descriptor.parameters);
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}
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}
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}
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if (!asset) // if it fails, use the default loader
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{
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JsonSerializationContext json;
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if (!json.Load(path))
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return {};
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if (!Unserialize(json, "", &asset.m_descriptor))
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return {};
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if constexpr (IsStreamingResource<TResource>)
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{
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asset.m_resource = TResource::OpenFromFile(asset.m_descriptor.path, asset.m_descriptor.parameters);
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}
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else
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{
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asset.m_resource = TResource::LoadFromFile(asset.m_descriptor.path, asset.m_descriptor.parameters);
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}
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}
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return asset;
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}
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}
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