WASM Python integration milestone - game.py runs in browser
Major milestone for issue #158 (Emscripten/WebAssembly build target): - Python 3.14 successfully initializes and runs in WASM - mcrfpy module loads and works correctly - Game scripts execute with full level generation - Entities (boulders, rats, cyclops, spawn points) placed correctly Key changes: - CMakeLists.txt: Add 2MB stack, Emscripten link options, preload files - platform.h: Add WASM-specific implementations for executable paths - HeadlessTypes.h: Make Texture/Font/Sound stubs return success - CommandLineParser.cpp: Guard filesystem operations for WASM - McRFPy_API.cpp: Add WASM path configuration, debug output - game.py: Make 'code' module import optional (not available in WASM) - wasm_stdlib/: Add minimal Python stdlib for WASM (~4MB) Build with: emmake make (from build-emscripten/) Test with: node mcrogueface.js Next steps: - Integrate VRSFML for actual WebGL rendering - Create HTML page to host WASM build - Test in actual browsers Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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07fd12373d
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222 changed files with 80639 additions and 25 deletions
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@ -698,32 +698,64 @@ PyObject* PyInit_mcrfpy()
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// init_python - configure interpreter details here
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PyStatus init_python(const char *program_name)
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{
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std::cerr << "[DEBUG] api_init: starting" << std::endl;
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std::cerr.flush();
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PyStatus status;
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//**preconfig to establish locale**
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//**preconfig to establish locale**
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PyPreConfig preconfig;
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PyPreConfig_InitIsolatedConfig(&preconfig);
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preconfig.utf8_mode = 1;
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std::cerr << "[DEBUG] api_init: Py_PreInitialize" << std::endl;
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std::cerr.flush();
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status = Py_PreInitialize(&preconfig);
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if (PyStatus_Exception(status)) {
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Py_ExitStatusException(status);
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std::cerr << "[DEBUG] api_init: PreInit failed" << std::endl;
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Py_ExitStatusException(status);
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}
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std::cerr << "[DEBUG] api_init: PyConfig setup" << std::endl;
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std::cerr.flush();
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PyConfig config;
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PyConfig_InitIsolatedConfig(&config);
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config.dev_mode = 0;
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config.dev_mode = 0;
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// Configure UTF-8 for stdio
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PyConfig_SetString(&config, &config.stdio_encoding, L"UTF-8");
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PyConfig_SetString(&config, &config.stdio_errors, L"surrogateescape");
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config.configure_c_stdio = 1;
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#ifdef __EMSCRIPTEN__
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std::cerr << "[DEBUG] api_init: WASM path config" << std::endl;
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std::cerr.flush();
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// WASM: Use absolute paths in virtual filesystem
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PyConfig_SetString(&config, &config.executable, L"/mcrogueface");
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PyConfig_SetString(&config, &config.home, L"/lib/python3.14");
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status = PyConfig_SetBytesString(&config, &config.program_name, "mcrogueface");
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// Set up module search paths for WASM
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config.module_search_paths_set = 1;
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const wchar_t* wasm_paths[] = {
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L"/scripts",
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L"/lib/python3.14"
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};
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for (auto s : wasm_paths) {
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status = PyWideStringList_Append(&config.module_search_paths, s);
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if (PyStatus_Exception(status)) {
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continue;
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}
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}
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#else
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// Set sys.executable to the McRogueFace binary path
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auto exe_filename = executable_filename();
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PyConfig_SetString(&config, &config.executable, exe_filename.c_str());
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PyConfig_SetBytesString(&config, &config.home,
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PyConfig_SetBytesString(&config, &config.home,
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narrow_string(executable_path() + L"/lib/Python").c_str());
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status = PyConfig_SetBytesString(&config, &config.program_name,
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@ -770,6 +802,7 @@ PyStatus init_python(const char *program_name)
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}
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}
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#endif
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#endif // __EMSCRIPTEN__
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status = Py_InitializeFromConfig(&config);
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@ -780,11 +813,18 @@ PyStatus init_python(const char *program_name)
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PyStatus McRFPy_API::init_python_with_config(const McRogueFaceConfig& config)
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{
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std::cerr << "[DEBUG] init_python_with_config: starting" << std::endl;
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std::cerr.flush();
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// If Python is already initialized, just return success
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if (Py_IsInitialized()) {
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std::cerr << "[DEBUG] init_python_with_config: already initialized" << std::endl;
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return PyStatus_Ok();
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}
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std::cerr << "[DEBUG] init_python_with_config: PyConfig_InitIsolatedConfig" << std::endl;
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std::cerr.flush();
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PyStatus status;
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PyConfig pyconfig;
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PyConfig_InitIsolatedConfig(&pyconfig);
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@ -849,7 +889,10 @@ PyStatus McRFPy_API::init_python_with_config(const McRogueFaceConfig& config)
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return status;
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}
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// Set Python home to our bundled Python
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#ifndef __EMSCRIPTEN__
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// Check if we're in a virtual environment (symlinked into a venv)
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// Skip for WASM builds - no filesystem access like this
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auto exe_wpath = executable_filename();
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auto exe_path_fs = std::filesystem::path(exe_wpath);
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auto exe_dir = exe_path_fs.parent_path();
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@ -880,8 +923,24 @@ PyStatus McRFPy_API::init_python_with_config(const McRogueFaceConfig& config)
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pyconfig.module_search_paths_set = 1;
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}
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}
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#endif // !__EMSCRIPTEN__
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#ifdef __EMSCRIPTEN__
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// WASM: Use absolute paths in virtual filesystem
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PyConfig_SetString(&pyconfig, &pyconfig.home, L"/lib/python3.14");
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// Set Python home to our bundled Python
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// Set up module search paths for WASM
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pyconfig.module_search_paths_set = 1;
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const wchar_t* wasm_paths[] = {
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L"/scripts",
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L"/lib/python3.14"
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};
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for (auto s : wasm_paths) {
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status = PyWideStringList_Append(&pyconfig.module_search_paths, s);
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if (PyStatus_Exception(status)) {
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continue;
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}
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}
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#else
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auto python_home = executable_path() + L"/lib/Python";
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PyConfig_SetString(&pyconfig, &pyconfig.home, python_home.c_str());
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@ -907,6 +966,7 @@ PyStatus McRFPy_API::init_python_with_config(const McRogueFaceConfig& config)
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}
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}
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#endif
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#endif // __EMSCRIPTEN__
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// Register mcrfpy module before initialization
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PyImport_AppendInittab("mcrfpy", &PyInit_mcrfpy);
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@ -988,26 +1048,39 @@ void McRFPy_API::api_init(const McRogueFaceConfig& config) {
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void McRFPy_API::executeScript(std::string filename)
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{
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std::string script_path_str;
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#ifdef __EMSCRIPTEN__
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// WASM: Scripts are at /scripts/ in virtual filesystem
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if (filename.find('/') == std::string::npos) {
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// Simple filename - look in /scripts/
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script_path_str = "/scripts/" + filename;
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} else {
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script_path_str = filename;
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}
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#else
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std::filesystem::path script_path(filename);
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// If the path is relative and the file doesn't exist, try resolving it relative to the executable
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if (script_path.is_relative() && !std::filesystem::exists(script_path)) {
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// Get the directory where the executable is located using platform-specific function
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std::wstring exe_dir_w = executable_path();
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std::filesystem::path exe_dir(exe_dir_w);
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// Try the script path relative to the executable directory
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std::filesystem::path resolved_path = exe_dir / script_path;
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if (std::filesystem::exists(resolved_path)) {
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script_path = resolved_path;
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}
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}
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script_path_str = script_path.string();
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#endif
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// Use std::ifstream + PyRun_SimpleString instead of PyRun_SimpleFile
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// PyRun_SimpleFile has compatibility issues with MinGW-compiled code
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std::ifstream file(script_path);
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std::ifstream file(script_path_str);
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if (!file.is_open()) {
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std::cout << "Failed to open script: " << script_path.string() << std::endl;
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std::cout << "Failed to open script: " << script_path_str << std::endl;
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return;
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}
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@ -1018,7 +1091,7 @@ void McRFPy_API::executeScript(std::string filename)
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// Set __file__ before execution
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PyObject* main_module = PyImport_AddModule("__main__");
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PyObject* main_dict = PyModule_GetDict(main_module);
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PyObject* py_filename = PyUnicode_FromString(script_path.string().c_str());
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PyObject* py_filename = PyUnicode_FromString(script_path_str.c_str());
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PyDict_SetItemString(main_dict, "__file__", py_filename);
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Py_DECREF(py_filename);
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