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197e10c0cf
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GPG key ID:
8C30176798F1A6BA
2 changed files with 81 additions and 77 deletions
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@ -10,10 +10,12 @@ ShaderAsset::ShaderAsset(const std::filesystem::path &path): m_stream(path)
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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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const auto read = [this](auto &field) {
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m_stream.read(std::bit_cast<char *>(&field), sizeof(field));
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};
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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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@ -22,12 +24,15 @@ ShaderAsset::ShaderAsset(const std::filesystem::path &path): m_stream(path)
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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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read(m_asset_metadata.type);
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read(m_asset_metadata.version);
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read(m_metadata.type);
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read(m_code_blob_metadata.tag);
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read(m_code_blob_metadata.offset);
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read(m_code_blob_metadata.compression_type);
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read(m_code_blob_metadata.compressed_size);
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read(m_code_blob_metadata.uncompressed_size);
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ensure(
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m_asset_metadata.type == asset_type_identifier,
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@ -69,4 +74,69 @@ ShaderAsset::ShaderAsset(const std::filesystem::path &path): m_stream(path)
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);
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}
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/* static */ void ShaderAsset::pack(
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const std::filesystem::path &destination,
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AssetMetadata asset_metadata,
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Metadata metadata,
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Blob code_blob
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)
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{
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auto stream = std::ofstream {
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destination,
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std::ios::binary | std::ios::trunc,
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};
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const auto code_blob_metadata = BlobMetadata {
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.tag = std::to_underlying(BlobTag::code),
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.offset = static_cast<size_t>(stream.tellp()) + sizeof(BlobMetadata),
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.compression_type = CompressionType::none,
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.compressed_size = code_blob.size(),
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.uncompressed_size = code_blob.size(),
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};
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ensure(stream.is_open(), "Failed to pack shader asset to {}", destination.string());
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const auto write = [&stream](auto &field) {
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stream.write(std::bit_cast<char *>(&field), sizeof(field));
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};
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write(asset_metadata.type);
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write(asset_metadata.version);
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write(metadata.type);
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write(code_blob_metadata.tag);
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write(code_blob_metadata.offset);
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write(code_blob_metadata.compression_type);
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write(code_blob_metadata.compressed_size);
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write(code_blob_metadata.uncompressed_size);
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stream.write(std::bit_cast<char *>(code_blob.data()), static_cast<long long>(code_blob.size()));
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}
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void ShaderAsset::unpack_to(BlobTag tag, std::span<std::byte> destination) const
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{
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ensure(tag == BlobTag::code, "Invalid blob tag for shader asset: {}", std::to_underlying(tag));
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ensure(
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destination.size() >= m_code_blob_metadata.uncompressed_size,
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"Failed to unpack shader blob {} to destination ({}) of size {} since it's smaller "
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"than the blobl's uncompressed size: {}",
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std::to_underlying(tag),
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std::bit_cast<size_t>(destination.data()),
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destination.size(),
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m_code_blob_metadata.uncompressed_size
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);
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m_stream.seekg(static_cast<long long>(m_code_blob_metadata.offset));
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m_stream.read(
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std::bit_cast<char *>(destination.data()),
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static_cast<long long>(m_code_blob_metadata.uncompressed_size)
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);
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}
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[[nodiscard]] auto ShaderAsset::unpack(BlobTag tag) const -> Blob
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{
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ensure(tag == BlobTag::code, "Invalid blob tag for shader asset: {}", std::to_underlying(tag));
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auto blob = Blob(m_code_blob_metadata.uncompressed_size);
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unpack_to(tag, blob);
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return blob;
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}
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} // namespace lt::assets
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@ -32,41 +32,14 @@ public:
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AssetMetadata asset_metadata,
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Metadata metadata,
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Blob code_blob
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)
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{
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auto stream = std::ofstream {
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destination,
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std::ios::binary | std::ios::trunc,
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};
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const auto code_blob_metadata = BlobMetadata {
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.tag = std::to_underlying(BlobTag::code),
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.offset = static_cast<size_t>(stream.tellp()) + sizeof(BlobMetadata),
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.compression_type = CompressionType::none,
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.compressed_size = code_blob.size(),
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.uncompressed_size = code_blob.size(),
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};
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ensure(stream.is_open(), "Failed to pack shader asset to {}", destination.string());
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const auto write = [&stream](auto &field) {
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stream.write(std::bit_cast<char *>(&field), sizeof(field));
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};
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write(asset_metadata.type);
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write(asset_metadata.version);
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write(metadata.type);
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write(code_blob_metadata.tag);
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write(code_blob_metadata.offset);
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write(code_blob_metadata.compression_type);
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write(code_blob_metadata.compressed_size);
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write(code_blob_metadata.uncompressed_size);
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stream.write(
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std::bit_cast<char *>(code_blob.data()),
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static_cast<long long>(code_blob.size())
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);
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}
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);
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ShaderAsset(const std::filesystem::path &path);
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void unpack_to(BlobTag tag, std::span<std::byte> destination) const;
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[[nodiscard]] auto unpack(BlobTag tag) const -> Blob;
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[[nodiscard]] auto get_asset_metadata() const -> const AssetMetadata &
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{
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return m_asset_metadata;
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@ -88,45 +61,6 @@ public:
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return m_code_blob_metadata;
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}
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void unpack_to(BlobTag tag, std::span<std::byte> destination) const
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{
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ensure(
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tag == BlobTag::code,
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"Invalid blob tag for shader asset: {}",
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std::to_underlying(tag)
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);
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ensure(
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destination.size() >= m_code_blob_metadata.uncompressed_size,
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"Failed to unpack shader blob {} to destination ({}) of size {} since it's smaller "
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"than the blobl's uncompressed size: {}",
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std::to_underlying(tag),
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(size_t)(destination.data()), // NOLINT(cppcoreguidelines-pro-type-cstyle-cast)
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destination.size(),
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m_code_blob_metadata.uncompressed_size
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);
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m_stream.seekg(static_cast<long long>(m_code_blob_metadata.offset));
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m_stream.read(
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(char *)destination.data(), // NOLINT(cppcoreguidelines-pro-type-cstyle-cast)
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static_cast<long long>(m_code_blob_metadata.uncompressed_size)
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);
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}
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[[nodiscard]] auto unpack(BlobTag tag) const -> Blob
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{
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ensure(
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tag == BlobTag::code,
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"Invalid blob tag for shader asset: {}",
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std::to_underlying(tag)
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);
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auto blob = Blob(m_code_blob_metadata.uncompressed_size);
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unpack_to(tag, blob);
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return blob;
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}
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private:
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AssetMetadata m_asset_metadata {};
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