1 files changed, 125 insertions, 0 deletions
diff --git a/tools/asset_packer.cc b/tools/asset_packer.cc
new file mode 100644
index 0000000..8b06829
--- /dev/null
+++ b/tools/asset_packer.cc
@@ -0,0 +1,125 @@
+#include <fstream>
+#include <iostream>
+#include <map>
+#include <string>
+#include <vector>
+
+int main(int argc, char *argv[]) {
+  if (argc != 4) {
+    std::cerr << "Usage: " << argv[0]
+              << " <assets.txt_path> <output_assets_h_path> "
+                 "<output_assets_data_cc_path>\n";
+    return 1;
+  }
+
+  std::string assets_txt_path = argv[1];
+  std::string output_assets_h_path = argv[2];
+  std::string output_assets_data_cc_path = argv[3];
+
+  std::ifstream assets_txt_file(assets_txt_path);
+  if (!assets_txt_file.is_open()) {
+    std::cerr << "Error: Could not open assets.txt at " << assets_txt_path
+              << "\n";
+    return 1;
+  }
+
+  std::ofstream assets_h_file(output_assets_h_path);
+  if (!assets_h_file.is_open()) {
+    std::cerr << "Error: Could not open output assets.h at "
+              << output_assets_h_path << "\n";
+    return 1;
+  }
+
+  std::ofstream assets_data_cc_file(output_assets_data_cc_path);
+  if (!assets_data_cc_file.is_open()) {
+    std::cerr << "Error: Could not open output assets_data.cc at "
+              << output_assets_data_cc_path << "\n";
+    return 1;
+  }
+
+  // Generate assets.h
+  assets_h_file << "#pragma once\n";
+  assets_h_file << "#include <cstdint>\n\n";
+  assets_h_file << "enum class AssetId : uint16_t {\n";
+
+  // Generate assets_data.cc header
+  assets_data_cc_file << "#include \"assets.h\"\n\n";
+  assets_data_cc_file << "#include <vector>\n\n";
+
+  std::string line;
+  int asset_id_counter = 0;
+  std::vector<std::string> asset_names;
+
+  while (std::getline(assets_txt_file, line)) {
+    if (line.empty() || line[0] == '#')
+      continue; // Skip empty lines and comments
+
+    size_t first_comma = line.find(',');
+    if (first_comma == std::string::npos) {
+      std::cerr << "Warning: Skipping malformed line in assets.txt: " << line
+                << "\n";
+      continue;
+    }
+
+    std::string asset_name = line.substr(0, first_comma);
+    asset_name.erase(0, asset_name.find_first_not_of(" \t\r\n"));
+    asset_name.erase(asset_name.find_last_not_of(" \t\r\n") + 1);
+
+    if (asset_name.empty()) {
+      std::cerr << "Warning: Skipping line with empty asset name: " << line
+                << "\n";
+      continue;
+    }
+
+    asset_names.push_back(asset_name);
+
+    // Add to assets.h enum
+    assets_h_file << "  ASSET_" << asset_name << " = " << asset_id_counter
+                  << ",\n";
+
+    // Placeholder for assets_data.cc (empty data for now)
+    assets_data_cc_file << "const uint8_t ASSET_DATA_" << asset_name
+                        << "[] = {};\n";
+    assets_data_cc_file << "const size_t ASSET_SIZE_" << asset_name
+                        << " = 0;\n\n";
+
+    asset_id_counter++;
+  }
+
+  assets_h_file << "};\n\n";
+
+  // Generate GetAsset function declaration in assets.h
+  assets_h_file
+      << "const uint8_t *GetAsset(AssetId asset_id, size_t *out_size = nullptr);\n";
+  assets_h_file << "void DropAsset(AssetId asset_id, const uint8_t *asset); // For lazy "
+                   "decompression scaffolding\n";
+  assets_h_file.close();
+
+  // Generate GetAsset function implementation in assets_data.cc
+  assets_data_cc_file << "const uint8_t *GetAsset(AssetId asset_id, size_t *out_size) {\n";
+  assets_data_cc_file << "  if (out_size) *out_size = 0;\n"; // Default for now
+  assets_data_cc_file << "  switch (asset_id) {\n";
+  for (const std::string &name : asset_names) {
+    assets_data_cc_file << "    case AssetId::ASSET_" << name << ":\n";
+    assets_data_cc_file << "      if (out_size) *out_size = ASSET_SIZE_" << name << ";\n";
+    assets_data_cc_file << "      return ASSET_DATA_" << name << ";\n";
+  }
+  assets_data_cc_file << "    default:\n";
+  assets_data_cc_file << "      return nullptr;\n";
+  assets_data_cc_file << "  }\n";
+  assets_data_cc_file << "}\n\n";
+
+  // Dummy DropAsset implementation
+  assets_data_cc_file << "void DropAsset(AssetId asset_id, const uint8_t *asset) {\n";
+  assets_data_cc_file << "  (void)asset_id;\n";
+  assets_data_cc_file << "  (void)asset;\n";
+  assets_data_cc_file << "  // No-op for now, actual implementation for lazy decompression goes here\n";
+  assets_data_cc_file << "}\n";
+
+  assets_data_cc_file.close();
+
+  std::cout << "Asset packer successfully generated: " << output_assets_h_path
+            << " and " << output_assets_data_cc_path << "\n";
+
+  return 0;
+}