feat: asset baking

Only supported .png textures at the moment

docs/architecture/assets.rst

@@ -5,6 +5,7 @@ Layout
 {version}              | 4 bytes, ie. uint32_t
 {general metadata}     | sizeof(AssetMetadata)
 {specialized metadata} | sizeof(XXXAssetMetadata), eg. TextureAssetMetadata
+{n}                    | 4 bytes, ie. uint32_t
 {blob_0...n metadata}  | n * sizeof(BlobMetadata)
 {blob_0...n data}      | variable size based on actual data
 {end marker}           | 8 byte, ie size_t for marking the END
@@ -13,7 +14,8 @@ Sections
 ---------------------------------------------------------------------------------------------------
 version              -> The version of the asset for forward compatibility
 general metadata     -> Common asset metadata such as file-path, asset-type, creator, etc.
-specialized metadata -> Metadata specific to the asset, eg. texture dimensions for Textures
+specialized metadata -> Metadata specific to the asset, eg. texture dimensions for Textures.
+n                    -> The number of blobs.
 blob_0...n metadata  -> Metadata specifying how the actual data is packed, required for unpacking.
 blob_0...n data      -> The actual data, packed and compressed to be reacdy for direct engine consumption.
 

docs/architecture/resource.rst

@@ -0,0 +1,4 @@
+Resource Management
+
+===================================================================================================
+

modules/asset_baker/CMakeLists.txt

@@ -6,4 +6,5 @@ target_link_libraries(
     asset_baker
     PRIVATE asset_parser
     PRIVATE stb::stb
+    PRIVATE logger
 )

modules/asset_baker/include/asset_baker/bakers.hpp

@@ -0,0 +1,120 @@
+#pragma once
+
+#include <asset_parser/assets/texture.hpp>
+#include <filesystem>
+#include <logger/logger.hpp>
+#include <string_view>
+#include <unordered_set>
+
+#define STB_IMAGE_IMPLEMENTATION
+#include <stb_image.h>
+
+namespace lt {
+
+class Loader
+{
+public:
+	[[nodiscard]] virtual auto get_name() const -> std::string_view = 0;
+
+	Loader() = default;
+
+	Loader(Loader &&) = default;
+
+	Loader(const Loader &) = delete;
+
+	auto operator=(Loader &&) -> Loader & = default;
+
+	auto operator=(const Loader &) -> Loader & = delete;
+
+	virtual ~Loader() = default;
+
+private:
+};
+
+class TextureLoader: public Loader
+{
+public:
+	TextureLoader() = default;
+
+	[[nodiscard]] virtual auto load(std::filesystem::path file_path) const
+	    -> Assets::TextureAsset::PackageData
+	    = 0;
+};
+
+
+class StbLoader: public TextureLoader
+{
+public:
+	StbLoader() = default;
+
+	void load(std::filesystem::path path);
+
+	[[nodiscard]] static auto get_supported_extensions() -> std::unordered_set<std::string_view>
+	{
+		return { ".png" };
+	}
+
+	[[nodiscard]] auto get_name() const -> std::string_view override
+	{
+		return "StbLoader";
+	}
+
+	[[nodiscard]] auto load(std::filesystem::path file_path) const
+	    -> Assets::TextureAsset::PackageData override
+	{
+		auto width = int {};
+		auto height = int {};
+		auto channels = int {};
+
+		auto *pixels = stbi_load(file_path.string().c_str(), &width, &height, &channels, 4);
+		if (!pixels)
+		{
+			throw std::runtime_error {
+				std::format("Failed to load image file at: {} using stbi_load", file_path.string()),
+			};
+		}
+
+		const auto metadata = Assets::Asset::Metadata {
+			.type = Assets::Asset::Type::Texture,
+		};
+
+		const auto texture_metadata = Assets::TextureAsset::Metadata {
+            .format = Assets::TextureAsset::Format::RGBA8,
+            .num_components = static_cast<uint32_t>(channels),
+            .pixel_size = {
+                static_cast<uint32_t>(width),
+                static_cast<uint32_t>(height),
+                {},
+            },
+        };
+
+		auto pixels_blob = Assets::Blob {};
+		pixels_blob.resize(static_cast<size_t>(width) * height * channels);
+
+		// TODO(Light): figure out if it's possible to directly populate a blob with stbi functions
+		memcpy(pixels_blob.data(), pixels, pixels_blob.size());
+		stbi_image_free(pixels);
+
+		return Assets::TextureAsset::PackageData {
+			.metadata = metadata,
+			.texture_metadata = texture_metadata,
+			.pixels = std::move(pixels_blob),
+		};
+	}
+};
+
+class TextureLoaderFactory
+{
+public:
+	static auto create(std::string_view file_extension) -> std::unique_ptr<TextureLoader>
+	{
+		if (StbLoader::get_supported_extensions().contains(file_extension))
+		{
+			return std::make_unique<StbLoader>();
+		}
+
+		return {};
+	}
+};
+
+} // namespace lt

modules/asset_baker/src/baker.cpp

@@ -1,85 +1,70 @@
+#include <asset_baker/bakers.hpp>
 #include <asset_parser/assets/texture.hpp>
 #include <asset_parser/parser.hpp>
 #include <filesystem>
-#include <iostream>
+#include <logger/logger.hpp>
 
-#define STB_IMAGE_IMPLEMENTATION
+void try_packing_texture(
-#include <stb_image.h>
+    const std::filesystem::path &in_path,
-
+    const std::filesystem::path &out_path
-#define ASSERT(x, ...)    \
+)
-	if (!(x))             \
-	{                     \
-		log(__VA_ARGS__); \
-		return -1;        \
-	}
-
-
-template<typename... Args>
-void log(Args &&...args)
 {
-	(std::cout << ... << args);
+	auto texture_loader = lt::TextureLoaderFactory::create(in_path.extension().string());
-	std::cout << '\n';
+	if (!texture_loader)
-}
-
-auto convert_image(const std::filesystem::path &input, const std::filesystem::path &output) -> bool
-{
-	auto width = int {};
-	auto height = int {};
-	auto channels = int {};
-
-	auto *pixels = stbi_load(input.string().c_str(), &width, &height, &channels, 4);
-
-	if (!pixels)
-		return false;
-
-	auto texture_info = Assets::TextureInfo {
-		.size       = static_cast<size_t>(width * height * 4),
-		.format     = Assets::TextureFormat::RGBA8,
-		.pixel_size = {
-		    static_cast<uint32_t>(width),
-		    static_cast<uint32_t>(height),
-		    0ul,
-		},
-		.original_file = input.string(),
-	};
-
-	auto file = Assets::pack_texture(&texture_info, pixels);
-
-	stbi_image_free(pixels);
-
-	Assets::save_binary_file(output.string().c_str(), file);
-
-	return true;
-}
-
-int main(int argc, char *argv[])
-{
-	std::ios_base::sync_with_stdio(false);
-
-	ASSERT(
-	    argc == 3,
-	    "Argc MUST be 3, 1: execution-path(implicit), 2: input-directory, 3: output-directory"
-	);
-
-	for (const auto &p : std::filesystem::directory_iterator(argv[1]))
 	{
-		if (p.path().extension() == ".png")
+		// Don't log anything; this is expected.
-		{
+		return;
-			log("Found a texture: ", p);
-
-			auto newp = p.path();
-			newp.replace_extension(".asset_texture");
-			convert_image(p.path(), newp);
-		}
-		else if (p.path().extension() == ".obj")
-		{
-			log("Found a mesh -> ", p, " (unsupported)");
-		}
-		else
-		{
-			log("Unknown -> ", p);
-		}
 	}
 
-	return 0;
+	try
+	{
+		Assets::TextureAsset::pack(texture_loader->load(in_path), out_path);
+
+		log_inf("Packed a texture:");
+		log_inf("\tloader  : {}", texture_loader->get_name());
+		log_inf("\tin  path: {}", in_path.string());
+		log_inf("\tout path: {}", out_path.string());
+	}
+	catch (const std::exception &exp)
+	{
+		log_err("Failed to pack texture:");
+		log_err("\tloader  : {}", texture_loader->get_name());
+		log_err("\tin path : {}", in_path.string());
+		log_err("\tout path: {}", out_path.string());
+		log_err("\texp.what: {}", exp.what());
+	}
+}
+
+auto main(int argc, char *argv[]) -> int32_t
+try
+{
+	if (argc != 2)
+	{
+		throw std::logic_error("Argc should be 2 -- exe dir (implicit) and target dir");
+	}
+
+	for (const auto &directory_iterator :
+	     std::filesystem::recursive_directory_iterator(argv[1])) // NOLINT
+	{
+		if (directory_iterator.is_directory())
+		{
+			continue;
+		}
+
+		const auto &in_path = directory_iterator.path();
+
+		auto out_path = in_path;
+		out_path.replace_extension(".asset");
+
+		try_packing_texture(in_path, out_path);
+	}
+
+	return EXIT_SUCCESS;
+}
+catch (const std::exception &exp)
+{
+	log_crt("Terminating due to uncaught exception:");
+	log_crt("\texception.what: {}:", exp.what());
+
+	return EXIT_FAILURE;
 }

modules/asset_parser/CMakeLists.txt

@@ -7,4 +7,5 @@ target_link_libraries(
     asset_parser
     PRIVATE LZ4::lz4_static 
     PRIVATE nlohmann_json::nlohmann_json 
+    PRIVATE logger
 )

modules/asset_parser/include/asset_parser/assets/texture.hpp

@@ -1,34 +0,0 @@
-#pragma once
-
-#include <array>
-#include <asset_parser/parser.hpp>
-
-namespace Assets {
-
-enum class TextureFormat : uint8_t
-{
-	None = 0,
-	RGBA8,
-};
-
-struct TextureInfo
-{
-	size_t size;
-	CompressionMode compression_mode;
-	TextureFormat format;
-	std::array<uint32_t, 3> pixel_size;
-	std::string original_file;
-};
-
-auto read_texture_info(AssetFile *file) -> TextureInfo;
-
-void unpack_texture(
-    TextureInfo *info,
-    const void *source_buffer,
-    size_t source_size,
-    void *destination
-);
-
-auto pack_texture(TextureInfo *info, void *pixel_data) -> AssetFile;
-
-} // namespace Assets

modules/asset_parser/include/asset_parser/parser.hpp

@@ -1,34 +1,276 @@
 #pragma once
 
+#include <compressors/compressors.hpp>
 #include <cstdint>
-#include <string>
+#include <filesystem>
+#include <fstream>
+#include <logger/logger.hpp>
+#include <utility>
 #include <vector>
 
 namespace Assets {
 
-struct AssetFile
+constexpr auto current_version = uint32_t { 1 };
-{
-	uint32_t version;
 
+struct BlobMetadata
+{
+	enum class Tag : uint8_t
+	{
+		color,
+		depth,
+		vertices,
+		indices,
+	};
+
+	Tag tag;
+
+	size_t offset;
+
+	CompressionType compression_type;
+
+	size_t compressed_size;
+
+	size_t uncompressed_size;
+};
+
+
+using Blob = std::vector<std::byte>;
+
+class Asset
+{
+public:
 	enum class Type : uint32_t // NOLINT(performance-enum-size)
 	{
 		Texture,
 		Mesh,
 		Material,
-	} type;
+	};
 
-	std::string json;
+	struct Metadata
-	std::vector<uint8_t> blob;
+	{
+		Type type;
+	};
+
+	Asset() = default;
+
+	Asset(Metadata metadata, std::filesystem::path path, std::ifstream stream)
+	    : m_metadata(metadata)
+	    , m_file_path(std::move(path))
+	    , m_stream(std::move(stream))
+	{
+	}
+
+	/** Directly unpacks from disk to the destination.
+	 *
+	 * @note The destination MUST have at least blob_metadata.unpacked_size bytes available for
+	 * writing, otherwise segfault could occur!
+	 */
+	void unpack_blob(BlobMetadata::Tag blob_tag, std::byte *destination);
+
+	[[nodiscard]] auto get_metadata() const -> const Metadata &
+	{
+		return m_metadata;
+	}
+
+	[[nodiscard]] auto get_file_path() const -> std::filesystem::path
+	{
+		return m_file_path;
+	}
+
+private:
+	Metadata m_metadata;
+
+	std::filesystem::path m_file_path;
+
+	std::ifstream m_stream;
 };
 
-enum class CompressionMode : uint32_t // NOLINT(performance-enum-size)
+class TextureAsset: public Asset
 {
-	None,
+public:
-	LZ4,
+	enum class Format : uint32_t // NOLINT(performance-enum-size)
-	LZ4HC,
+	{
-};
+		None = 0,
+		RGBA8,
+	};
 
-auto save_binary_file(const char *path, const AssetFile &in_file) -> bool;
+	struct Metadata
-auto load_binary_file(const char *path, AssetFile &out_file) -> bool;
+	{
+		Format format;
+
+		uint32_t num_components;
+
+		std::array<uint32_t, 3> pixel_size;
+	};
+
+	/** Data required to pack a texture */
+	struct PackageData
+	{
+		Asset::Metadata metadata;
+
+		Metadata texture_metadata;
+
+		Blob pixels;
+	};
+
+	TextureAsset(const std::filesystem::path &path)
+	{
+		m_stream = std::ifstream { path, std::ios::binary };
+		if (!m_stream.is_open())
+		{
+			throw std::runtime_error { std::format(
+				"Failed to open ifm_stream for loading texture asset at: {}",
+				path.string()
+			) };
+		}
+
+		// NOLINTBEGIN(cppcoreguidelines-pro-type-cstyle-cast)
+		m_stream.read((char *)&version, sizeof(version));
+		m_stream.read((char *)&m_asset_metadata, sizeof(m_asset_metadata));
+		m_stream.read((char *)&m_metadata, sizeof(m_metadata));
+
+		auto num_blobs = uint32_t {};
+		m_stream.read((char *)&num_blobs, sizeof(num_blobs));
+		if (num_blobs != 1)
+		{
+			throw std::runtime_error {
+				std::format("Failed to load texture asset: invalid number of blobs: {}", num_blobs)
+			};
+		}
+
+		m_stream.read((char *)&m_pixel_blob_metadata, sizeof(m_pixel_blob_metadata));
+		if (m_pixel_blob_metadata.tag != BlobMetadata::Tag::color)
+		{
+			throw std::runtime_error {
+				std::format(
+				    "Failed to load texture asset: invalid blob tag, expected {}, got {}",
+				    std::to_underlying(BlobMetadata::Tag::color),
+				    std::to_underlying(m_pixel_blob_metadata.tag)
+				),
+			};
+		}
+		// NOLINTEND(cppcoreguidelines-pro-type-cstyle-cast)
+	}
+
+	void unpack_blob(BlobMetadata::Tag tag, std::byte *destination, size_t destination_capacity)
+	{
+		if (tag != BlobMetadata::Tag::color)
+		{
+			throw std::runtime_error { std::format(
+				"Invalid tag for unpack_blob of TextureAsset: {}",
+				std::to_underlying(tag)
+			) };
+		}
+
+		m_stream.seekg(static_cast<long>(m_pixel_blob_metadata.offset));
+		switch (m_pixel_blob_metadata.compression_type)
+		{
+		case Assets::CompressionType::None:
+			if (m_pixel_blob_metadata.uncompressed_size != m_pixel_blob_metadata.compressed_size)
+			{
+				throw std::runtime_error("Failed to unpack blob from TextureAsset: "
+				                         "compressed/uncompressed size mismatch for no compression "
+				                         "type");
+			}
+
+			if (m_pixel_blob_metadata.uncompressed_size > destination_capacity)
+			{
+				throw std::runtime_error("Failed to unpack blob from TextureAsset: "
+				                         "uncompressed_size > destination_capacity, unpacking "
+				                         "would result in segfault");
+			}
+
+			if (!m_stream.is_open())
+			{
+				throw std::runtime_error("Failed to unpack blob from TextureAsset: ifstream is "
+				                         "closed");
+			}
+
+			m_stream.read(
+			    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-cstyle-cast)
+			    (char *)destination,
+			    static_cast<long>(m_pixel_blob_metadata.uncompressed_size)
+			);
+
+			return;
+
+		default:
+			throw std::runtime_error(std::format(
+			    "Failed to unpack blob from TextureAsset: unsupported "
+			    "compression type: {}",
+			    std::to_underlying(m_pixel_blob_metadata.compression_type)
+			));
+		}
+	}
+
+	static void pack(const PackageData &data, const std::filesystem::path &out_path)
+	{
+		const auto &[metadata, texture_metadata, pixels] = data;
+
+		auto stream = std::ofstream { out_path, std::ios::binary | std::ios::trunc };
+		if (!stream.is_open())
+		{
+			throw std::runtime_error {
+				std::format("Failed to open ofstream for packing texture at: {}", out_path.string())
+			};
+		}
+		stream.seekp(0);
+
+		// NOLINTBEGIN(cppcoreguidelines-pro-type-cstyle-cast)
+		stream.write((char *)&current_version, sizeof(current_version));
+
+		stream.write((char *)&metadata, sizeof(metadata));
+		stream.write((char *)&texture_metadata, sizeof(texture_metadata));
+
+		constexpr auto number_of_blobs = uint32_t { 1 };
+		stream.write((char *)&number_of_blobs, sizeof(number_of_blobs));
+
+		auto pixels_metadata = BlobMetadata {
+			.tag = BlobMetadata::Tag::color,
+			.offset = static_cast<size_t>(stream.tellp()),
+			.compression_type = CompressionType::None,
+			.compressed_size = pixels.size(),
+			.uncompressed_size = pixels.size(),
+		};
+
+		stream.write((char *)&pixels_metadata, sizeof(pixels_metadata));
+		stream.write((char *)&pixels[0], static_cast<long>(pixels.size()));
+		// NOLINTEND(cppcoreguidelines-pro-type-cstyle-cast)
+	}
+
+	[[nodiscard]] auto get_asset_metadata() const -> const Asset::Metadata &
+	{
+		return m_asset_metadata;
+	}
+
+	[[nodiscard]] auto get_metadata() const -> const Metadata &
+	{
+		return m_metadata;
+	}
+
+	[[nodiscard]] auto get_blob_metadata(BlobMetadata::Tag tag) const -> const BlobMetadata &
+	{
+		if (tag != BlobMetadata::Tag::color)
+		{
+			throw std::runtime_error { std::format(
+				"Invalid tag for get_blob_metadata of TextureAsset: {}",
+				std::to_underlying(tag)
+			) };
+		}
+
+		return m_pixel_blob_metadata;
+	}
+
+private:
+	Asset::Metadata m_asset_metadata {};
+
+	Metadata m_metadata {};
+
+	BlobMetadata m_pixel_blob_metadata {};
+
+	uint32_t version {};
+
+	std::ifstream m_stream;
+};
 
 } // namespace Assets

modules/asset_parser/include/compressors/compressors.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <cstdint>
+
+namespace Assets {
+
+enum class CompressionType : uint32_t // NOLINT(performance-enum-size)
+{
+	None,
+	LZ4,
+	LZ4HC,
+};
+
+}

modules/asset_parser/src/assets/texture.cpp

@@ -2,79 +2,11 @@
 #include <lz4.h>
 #include <nlohmann/json.hpp>
 
+// [version], [type] --
+// [asset_metadata], [blob_metadata] --
+// [blob] --
+
 namespace Assets {
 
-using namespace nlohmann;
-
-auto read_texture_info(AssetFile *file) -> TextureInfo
-{
-	json texture_meta_data = json::parse(file->json);
-
-	return TextureInfo {
-		.size            = texture_meta_data["bufferSize"],
-		.compression_mode = texture_meta_data["compression"],
-		.format          = texture_meta_data["format"],
-		.pixel_size      = {
-		         texture_meta_data["width"],
-		         texture_meta_data["height"],
-		         0,
-        },
-		.original_file = texture_meta_data["originalFile"],
-	};
-}
-
-void unpack_texture(
-    TextureInfo *info,
-    const void *source_buffer,
-    size_t source_size,
-    void *destination
-)
-{
-	if (info->compression_mode == CompressionMode::LZ4)
-	{
-		LZ4_decompress_safe(
-		    (const char *)source_buffer,
-		    (char *)destination,
-		    source_size,
-		    info->size
-		);
-	}
-	else
-	{
-		memcpy(destination, source_buffer, source_size);
-	}
-}
-
-auto pack_texture(TextureInfo *info, void *pixel_data) -> AssetFile
-{
-	json metadata;
-	metadata["format"] = info->format;
-	metadata["width"] = info->pixel_size[0];
-	metadata["height"] = info->pixel_size[1];
-	metadata["bufferSize"] = info->size;
-	metadata["originalFile"] = info->original_file;
-	metadata["compression"] = CompressionMode::LZ4;
-
-	AssetFile file;
-	file.type = AssetFile::Type::Texture;
-	file.version = 1u;
-
-	const int compress_staging = LZ4_compressBound(info->size);
-	file.blob.resize(compress_staging);
-	const int compression_size = LZ4_compress_default(
-	    (const char *)pixel_data,
-	    (char *)file.blob.data(),
-	    info->size,
-	    compress_staging
-	);
-	file.blob.resize(compression_size);
-
-
-	metadata["compression"] = CompressionMode::LZ4;
-
-	file.json = metadata.dump();
-
-	return file;
-}
 
 } // namespace Assets

modules/asset_parser/src/parser.cpp

@@ -1,56 +1,62 @@
 #include <asset_parser/parser.hpp>
+#include <format>
 #include <fstream>
-#include <istream>
+#include <utility>
-#include <ostream>
 
 namespace Assets {
 
-auto save_binary_file(const char *path, const AssetFile &file) -> bool
+// void Asset::unpack(std::byte *destination)
-{
+// {
-	std::ofstream outstream(path, std::ios::binary | std::ios::out);
+// 	if (!m_stream.is_open())
-
+// 	{
-	outstream.write((const char *)&file.version, sizeof(uint32_t));
+// 		throw std::logic_error {
-	outstream.write((const char *)&file.type, sizeof(AssetFile::Type));
+// 			"Failed to unpack asset: "
-
+// 			"ifstream is closed",
-	uint32_t json_size = file.json.size();
+// 		};
-	uint32_t blob_size = file.blob.size();
+// 	}
-	outstream.write((const char *)&json_size, sizeof(uint32_t));
+//
-	outstream.write((const char *)&blob_size, sizeof(uint32_t));
+// 	switch (m_metadata.blob_compression_type)
-
+// 	{
-	outstream.write(file.json.c_str(), json_size);
+// 	case CompressionType::None:
-	outstream.write((const char *)file.blob.data(), blob_size);
+// 		if (m_metadata.packed_size != m_metadata.unpacked_size)
-
+// 		{
-	outstream.close();
+// 			throw std::logic_error {
-
+// 				"Failed to unpack asset: "
-	outstream.close();
+// 				"compression type set to none but packed/unpacked sizes differ",
-
+// 			};
-	return true;
+// 		}
-}
+//
-
+// 		m_stream.read(
-auto load_binary_file(const char *path, AssetFile &out_file) -> bool
+// 		    std::bit_cast<char *>(destination),
-{
+// 		    static_cast<long>(m_metadata.packed_size)
-	std::ifstream instream(path, std::ios::binary);
+// 		);
-	instream.seekg(0ull);
+// 		m_stream.close();
-
+//
-	if (!instream.is_open())
+// 	case CompressionType::LZ4:
-		return false;
+// 		m_stream.close();
-
+// 		throw std::logic_error {
-	instream.read((char *)&out_file.version, sizeof(uint32_t));
+// 			"Failed to unpack asset: "
-	instream.read((char *)&out_file.type, sizeof(AssetFile::Type));
+// 			"LZ4 compression is not implemented yet",
-
+// 		};
-	uint32_t json_size;
+//
-	uint32_t blob_size;
+//
-	instream.read((char *)&json_size, sizeof(uint32_t));
+// 	case CompressionType::LZ4HC:
-	instream.read((char *)&blob_size, sizeof(uint32_t));
+// 		m_stream.close();
-
+// 		throw std::logic_error {
-	out_file.json.resize(json_size);
+// 			"Failed to unpack asset: "
-	out_file.blob.resize(blob_size);
+// 			"LZ4HC compression is not implemented yet",
-	instream.read((char *)out_file.json.data(), json_size);
+// 		};
-	instream.read((char *)out_file.blob.data(), blob_size);
+//
-
+// 	default:
-	instream.close();
+// 		m_stream.close();
-
+// 		throw std::logic_error {
-	return true;
+// 			std::format(
-}
+// 			    "Failed to unpack asset: "
+// 			    "Compression type was not recognized: {}",
+// 			    std::to_underlying(m_metadata.blob_compression_type)
+// 			),
+// 		};
+// 	}
+// }
 
 } // namespace Assets

modules/engine/CMakeLists.txt

@@ -104,7 +104,7 @@ target_link_libraries(
   PUBLIC opengl::opengl
   PUBLIC glfw
   PUBLIC imgui
-  PUBLIC stb::stb
+  PUBLIC asset_parser
   PUBLIC yaml-cpp::yaml-cpp
   PUBLIC EnTT::EnTT
 )

modules/engine/include/engine/utils/file_manager.hpp

@@ -7,7 +7,7 @@ namespace Light {
 class BasicFileHandle
 {
 public:
-virtual ~BasicFileHandle() = default;
+	virtual ~BasicFileHandle() = default;
 	BasicFileHandle(
 	    uint8_t *data = nullptr,
 	    uint32_t size = 0ull,
@@ -58,13 +58,12 @@ virtual ~BasicFileHandle() = default;
 		return is_valid();
 	}
 
-protected:
+private:
 	// made protected for custom free():
 	uint8_t *m_data;
 
 	uint32_t m_size;
 
-private:
 	const std::string m_path;
 
 	const std::string m_name;
@@ -72,68 +71,10 @@ private:
 	const std::string m_extension;
 };
 
-class ImageFileHandle: public BasicFileHandle
-{
-public:
-virtual ~ImageFileHandle() = default;
-	ImageFileHandle(
-	    uint8_t *data,
-	    uint32_t size,
-	    const std::string &path,
-	    const std::string &name,
-	    const std::string &extension,
-	    uint32_t width,
-	    uint32_t height,
-	    uint32_t components,
-	    uint32_t desiredComponents
-	)
-	    : BasicFileHandle(data, size, path, name, extension)
-	    , m_width(width)
-	    , m_height(height)
-	    , m_components(components)
-	    , m_desired_components(desiredComponents)
-	{
-	}
-
-	void release() override;
-
-	[[nodiscard]] auto get_width() const -> uint32_t
-	{
-		return m_width;
-	}
-
-	[[nodiscard]] auto get_height() const -> uint32_t
-	{
-		return m_height;
-	}
-
-	[[nodiscard]] auto get_components() const -> uint32_t
-	{
-		return m_components;
-	}
-
-	[[nodiscard]] auto get_desired_components() const -> uint32_t
-	{
-		return m_desired_components;
-	}
-
-private:
-	uint32_t m_width;
-
-	uint32_t m_height;
-
-	uint32_t m_components;
-
-	uint32_t m_desired_components;
-};
-
 class FileManager
 {
 public:
 	static auto read_text_file(const std::string &path) -> BasicFileHandle;
-
-	static auto read_image_file(const std::string &path, int32_t desiredComponents)
-	    -> ImageFileHandle;
 };
 
 } // namespace Light

modules/engine/include/engine/utils/resource_manager.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <engine/base/base.hpp>
+#include <filesystem>
 
 namespace Light {
 
@@ -26,13 +27,9 @@ public:
 		instance().load_shader_impl(name, vertexPath, pixelPath);
 	}
 
-	static void load_texture(
+	static void load_texture(const std::string &name, const std::string &path)
-	    const std::string &name,
-	    const std::string &path,
-	    unsigned int desiredComponents = 4u
-	)
 	{
-		instance().load_texture_impl(name, path, desiredComponents);
+		instance().load_texture_impl(name, path);
 	}
 
 	static void release_texture(const std::string &name)
@@ -59,11 +56,7 @@ private:
 	    const std::string &pixelPath
 	);
 
-	void load_texture_impl(
+	void load_texture_impl(const std::string &name, const std::filesystem::path &path);
-	    const std::string &name,
-	    const std::string &path,
-	    unsigned int desiredComponents = 4u
-	);
 
 	void release_texture_impl(const std::string &name);
 

modules/engine/src/utils/file_manager.cpp

@@ -1,7 +1,5 @@
-#define STB_IMAGE_IMPLEMENTATION
 #include <engine/utils/file_manager.hpp>
 #include <utility>
-#include <stb_image.h>
 
 namespace Light {
 
@@ -27,7 +25,6 @@ void BasicFileHandle::release()
 	m_size = 0ull;
 }
 
-
 auto FileManager::read_text_file(const std::string &path) -> BasicFileHandle
 {
 	// parse path info
@@ -63,52 +60,52 @@ auto FileManager::read_text_file(const std::string &path) -> BasicFileHandle
 	return { data, static_cast<unsigned int>(size), path, name, extension };
 }
 
-auto FileManager::read_image_file(const std::string &path, int32_t desiredComponents)
+// auto FileManager::read_image_file(const std::string &path, int32_t desiredComponents)
-    -> ImageFileHandle
+//     -> ImageFileHandle
-{
+// {
-	// parse path info
+// 	// parse path info
-	auto name = path.substr(0, path.find('.') + -1);
+// 	auto name = path.substr(0, path.find('.') + -1);
-	auto extension = path.substr(path.find('.') + 1);
+// 	auto extension = path.substr(path.find('.') + 1);
+//
+// 	// load image
+// 	auto width = 0;
+// 	auto height = 0;
+// 	auto fetchedComponents = 0;
+// 	auto *pixels = stbi_load(path.c_str(), &width, &height, &fetchedComponents, desiredComponents);
+//
+// 	// check
+// 	if (!pixels)
+// 	{
+// 		log_wrn("Failed to load image file: <{}>", path);
+// 	}
+// 	else if (fetchedComponents != desiredComponents)
+// 	{
+// 		log_wrn(
+// 		    "Mismatch of fetched/desired components: <{}> ({}/{})",
+// 		    name + '.' + extension,
+// 		    fetchedComponents,
+// 		    desiredComponents
+// 		);
+// 	}
+//
+// 	return ImageFileHandle(
+// 	    pixels,
+// 	    width * height,
+// 	    path,
+// 	    name,
+// 	    extension,
+// 	    width,
+// 	    height,
+// 	    fetchedComponents,
+// 	    desiredComponents
+// 	);
+// }
 
-	// load image
+// void ImageFileHandle::release()
-	auto width = 0;
+// {
-	auto height = 0;
+// 	stbi_image_free(reinterpret_cast<void *>(m_data));
-	auto fetchedComponents = 0;
+// 	m_data = nullptr;
-	auto *pixels = stbi_load(path.c_str(), &width, &height, &fetchedComponents, desiredComponents);
+// 	m_size = 0ull;
-
+// }
-	// check
-	if (!pixels)
-	{
-		log_wrn("Failed to load image file: <{}>", path);
-	}
-	else if (fetchedComponents != desiredComponents)
-	{
-		log_wrn(
-		    "Mismatch of fetched/desired components: <{}> ({}/{})",
-		    name + '.' + extension,
-		    fetchedComponents,
-		    desiredComponents
-		);
-	}
-
-	return ImageFileHandle(
-	    pixels,
-	    width * height,
-	    path,
-	    name,
-	    extension,
-	    width,
-	    height,
-	    fetchedComponents,
-	    desiredComponents
-	);
-}
-
-void ImageFileHandle::release()
-{
-	stbi_image_free(reinterpret_cast<void *>(m_data));
-	m_data = nullptr;
-	m_size = 0ull;
-}
 
 } // namespace Light

modules/engine/src/utils/resource_manager.cpp

@@ -1,3 +1,5 @@
+#include <asset_parser/assets/texture.hpp>
+#include <asset_parser/parser.hpp>
 #include <engine/graphics/graphics_context.hpp>
 #include <engine/graphics/shader.hpp>
 #include <engine/graphics/texture.hpp>
@@ -12,49 +14,44 @@ void ResourceManager::load_shader_impl(
     const std::string &pixelPath
 )
 {
-	// check
 	lt_assert(!vertexPath.empty(), "Empty 'vertexPath'");
 	lt_assert(!pixelPath.empty(), "Empty 'pixelPath'");
 
-	// load files
 	auto vertexFile = FileManager::read_text_file(vertexPath);
 	auto pixelFile = FileManager::read_text_file(pixelPath);
 
-	// check
 	lt_assert(vertexFile.is_valid(), "Failed to read vertex file: {}", vertexPath);
 	lt_assert(pixelFile.is_valid(), "Failed to read vertex file: {}", pixelPath);
 
-	// create shader
 	m_shaders[name] = Ref<Shader>(
 	    Shader::create(vertexFile, pixelFile, GraphicsContext::get_shared_context())
 	);
 
-	// free file
 	vertexFile.release();
 	pixelFile.release();
 }
 
-void ResourceManager::load_texture_impl(
+void ResourceManager::load_texture_impl(const std::string &name, const std::filesystem::path &path)
-    const std::string &name,
-    const std::string &path,
-    unsigned int desiredComponents /* = 4u */
-)
 {
-	// load file
+	log_trc("Loading texture:");
-	auto imgFile = FileManager::read_image_file(path, desiredComponents);
+	log_trc("\tname: {}", name);
+	log_trc("\tpath: {}", path.string());
+
+	auto asset = Assets::TextureAsset { path };
+	const auto metadata = asset.get_metadata();
+	const auto blob_metadata = asset.get_blob_metadata(Assets::BlobMetadata::Tag::color);
+
+	auto blob = std::vector<std::byte>(blob_metadata.uncompressed_size);
+	asset.unpack_blob(blob_metadata.tag, blob.data(), blob.size());
 
-	// create texture
 	m_textures[name] = Ref<Texture>(Texture::create(
-	    imgFile.get_width(),
+	    metadata.pixel_size[0],
-	    imgFile.get_height(),
+	    metadata.pixel_size[1],
-	    imgFile.get_components(),
+	    metadata.num_components,
-	    imgFile.get_data(),
+	    std::bit_cast<unsigned char *>(blob.data()),
 	    GraphicsContext::get_shared_context(),
 	    path
 	));
-
-	// free file
-	imgFile.release();
 }
 
 void ResourceManager::release_texture_impl(const std::string &name)

modules/mirror/src/editor_layer.cpp

@@ -28,7 +28,7 @@ EditorLayer::EditorLayer(const std::string &name)
 		m_camera_entity = m_scene->create_entity("Camera");
 		m_camera_entity.add_component<CameraComponent>(SceneCamera(), true);
 
-		ResourceManager::load_texture("Awesomeface", "data/assets/textures/awesomeface.png");
+		ResourceManager::load_texture("Awesomeface", "data/assets/textures/awesomeface.asset");
 
 		auto entity = Entity { m_scene->create_entity("Awesomeface", {}) };
 		entity.add_component<SpriteRendererComponent>(

modules/mirror/src/panel/asset_browser.cpp

@@ -10,10 +10,10 @@ AssetBrowserPanel::AssetBrowserPanel(Ref<Scene> active_scene)
     , m_assets_path("./data/assets")
     , m_active_scene(std::move(active_scene))
 {
-	ResourceManager::load_texture("_Assets_Directory", "data/engine/icons/asset/dir.png");
+	ResourceManager::load_texture("_Assets_Directory", "data/engine/icons/asset/dir.asset");
-	ResourceManager::load_texture("_Assets_Scene", "data/engine/icons/asset/scene.png");
+	ResourceManager::load_texture("_Assets_Scene", "data/engine/icons/asset/scene.asset");
-	ResourceManager::load_texture("_Assets_Image", "data/engine/icons/asset/img.png");
+	ResourceManager::load_texture("_Assets_Image", "data/engine/icons/asset/img.asset");
-	ResourceManager::load_texture("_Assets_Text", "data/engine/icons/asset/txt.png");
+	ResourceManager::load_texture("_Assets_Text", "data/engine/icons/asset/txt.asset");
 
 	m_directory_texture = ResourceManager::get_texture("_Assets_Directory");
 	m_scene_texture = ResourceManager::get_texture("_Assets_Scene");