ViewDesignEngine/include/vde/foundation/serializer.h

#pragma once
#include "vde/mesh/halfedge_mesh.h"
#include <vector>
#include <cstdint>
#include <string>

namespace vde::foundation {

// Versioned binary format for fast save/load
// Header: 8 bytes magic + 4 bytes version + 4 bytes flags

constexpr uint64_t VDE_MAGIC = 0x56444547454F4D00ULL; // "VDEGEOM\0"
constexpr uint32_t VDE_FORMAT_VERSION = 1;

struct SerializedMesh {
    uint32_t vertex_count;
    uint32_t face_count;
    std::vector<double> vertices;     // xyz xyz ... (flat)
    std::vector<int32_t> face_indices; // v0 v1 v2 ...
    std::vector<int32_t> face_valence; // 3 for all triangles
};

class BinarySerializer {
public:
    /// Serialize mesh to binary buffer
    static std::vector<uint8_t> serialize(const mesh::HalfedgeMesh& mesh);

    /// Deserialize mesh from binary buffer
    static mesh::HalfedgeMesh deserialize(const std::vector<uint8_t>& data);

    /// Write to file
    static bool write_file(const std::string& path, const mesh::HalfedgeMesh& mesh);

    /// Read from file
    static mesh::HalfedgeMesh read_file(const std::string& path);
};

}  // namespace vde::foundation