74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
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#include <assets/shader.hpp>
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namespace lt::assets {
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ShaderAsset::ShaderAsset(const std::filesystem::path &path)
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: m_stream(path, std::ios::binary | std::ios::beg)
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{
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constexpr auto total_metadata_size = //
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sizeof(AssetMetadata) //
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+ sizeof(Metadata) //
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+ sizeof(BlobMetadata);
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ensure(m_stream.is_open(), "Failed to open shader asset at: {}", path.string());
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m_stream.seekg(0, std::ifstream::end);
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const auto file_size = static_cast<size_t>(m_stream.tellg());
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ensure(
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file_size > total_metadata_size,
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"Failed to open shader asset at: {}, file smaller than metadata: {} < {}",
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path.string(),
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total_metadata_size,
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file_size
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);
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// NOLINTBEGIN(cppcoreguidelines-pro-type-cstyle-cast)
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m_stream.seekg(0, std::ifstream::beg);
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m_stream.read((char *)&m_asset_metadata, sizeof(m_asset_metadata));
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m_stream.read((char *)&m_metadata, sizeof(m_metadata));
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m_stream.read((char *)&m_code_blob_metadata, sizeof(m_code_blob_metadata));
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// NOLINTEND(cppcoreguidelines-pro-type-cstyle-cast)
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ensure(
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m_asset_metadata.type == asset_type_identifier,
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"Failed to open shader asset at: {}, incorrect asset type: {} != {}",
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path.string(),
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m_asset_metadata.type,
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asset_type_identifier
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);
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ensure(
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m_asset_metadata.version == current_version,
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"Failed to open shader asset at: {}, version mismatch: {} != {}",
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path.string(),
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m_asset_metadata.version,
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current_version
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);
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ensure(
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std::to_underlying(m_metadata.type) <= std::to_underlying(Type::compute),
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"Failed to open shader asset at: {}, invalid shader type: {}",
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path.string(),
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std::to_underlying(m_metadata.type)
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);
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ensure(
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m_code_blob_metadata.tag == std::to_underlying(BlobTag::code),
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"Failed to open shader asset at: {}, invalid blob tag: {}",
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path.string(),
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m_code_blob_metadata.tag
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);
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ensure(
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m_code_blob_metadata.offset + m_code_blob_metadata.compressed_size <= file_size,
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"Failed to open shader asset at: {}, file smaller than blob: {} > {} + {}",
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path.string(),
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file_size,
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m_code_blob_metadata.offset,
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m_code_blob_metadata.compressed_size
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);
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}
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} // namespace lt::assets
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