Fix crashes on macOS Apple Silicon (ARM64)

macos_window.mm

@@ -0,0 +1,17 @@
+#import <AppKit/AppKit.h>
+#include <QWindow>
+
+// Disable macOS native fullscreen on the given QWindow.
+// Must be called after the window is shown so the NSWindow exists.
+// This makes the green button zoom/maximize instead of triggering the
+// native fullscreen transition (which crashes the OpenGL context on ARM64).
+void disableNativeFullscreen(QWindow *window) {
+    NSView *nsView = (NSView *)window->winId();
+    if (!nsView) return;
+    NSWindow *nsWindow = [nsView window];
+    if (!nsWindow) return;
+    NSWindowCollectionBehavior behavior = [nsWindow collectionBehavior];
+    behavior &= ~NSWindowCollectionBehaviorFullScreenPrimary;
+    behavior &= ~NSWindowCollectionBehaviorFullScreenAuxiliary;
+    [nsWindow setCollectionBehavior:behavior];
+}

main.cpp

@@ -17,6 +17,10 @@
 #include <unistd.h>
 #include <sys/types.h>
 
+#ifdef __APPLE__
+void disableNativeFullscreen(QWindow *window);
+#endif
+
 lua_State *L;
 
 int dscount;
@@ -806,6 +810,12 @@ DrawStringCmd::DrawStringCmd(float X, float Y, int Align, int Size, int Font, co
         case 2:
             fontName = "Liberation Sans Bold";
             break;
+        case 3: // FONTIN
+        case 4: // FONTIN ITALIC
+        case 5: // FONTIN SC
+        case 6: // FONTIN SC ITALIC
+            fontName = "Liberation Sans";
+            break;
         case 0:
         default:
             fontName = "Bitstream Vera Sans Mono";
@@ -882,7 +892,7 @@ static int l_DrawString(lua_State* L)
     pobwindow->LAssert(L, lua_isstring(L, 5), "DrawString() argument 5: expected string, got %t", 5);
     pobwindow->LAssert(L, lua_isstring(L, 6), "DrawString() argument 6: expected string, got %t", 6);
     static const char* alignMap[6] = { "LEFT", "CENTER", "RIGHT", "CENTER_X", "RIGHT_X", nullptr };
-    static const char* fontMap[4] = { "FIXED", "VAR", "VAR BOLD", nullptr };
+    static const char* fontMap[8] = { "FIXED", "VAR", "VAR BOLD", "FONTIN", "FONTIN ITALIC", "FONTIN SC", "FONTIN SC ITALIC", nullptr };
     pobwindow->AppendCmd(std::make_unique<DrawStringCmd>(
         (float)lua_tonumber(L, 1), (float)lua_tonumber(L, 2), luaL_checkoption(L, 3, "LEFT", alignMap), 
         (int)lua_tointeger(L, 4), luaL_checkoption(L, 5, "FIXED", fontMap), lua_tostring(L, 6)
@@ -906,6 +916,10 @@ static int l_DrawStringWidth(lua_State* L)
     } else if (fontName == "VAR BOLD") {
         fontName = "Liberation Sans Bold";
         fontKey = "2";
+    } else if (fontName == "FONTIN" || fontName == "FONTIN ITALIC" ||
+               fontName == "FONTIN SC" || fontName == "FONTIN SC ITALIC") {
+        fontName = "Liberation Sans";
+        fontKey = "3";
     } else {
         fontName = "Bitstream Vera Sans Mono";
     }
@@ -942,6 +956,9 @@ static int l_DrawStringCursorIndex(lua_State* L)
         fontName = "Liberation Sans";
     } else if (fontName == "VAR BOLD") {
         fontName = "Liberation Sans Bold";
+    } else if (fontName == "FONTIN" || fontName == "FONTIN ITALIC" ||
+               fontName == "FONTIN SC" || fontName == "FONTIN SC ITALIC") {
+        fontName = "Liberation Sans";
     } else {
         fontName = "Bitstream Vera Sans Mono";
     }
@@ -1633,6 +1650,13 @@ int main(int argc, char **argv)
     luaL_openlibs(L);
     luaJIT_setmode(L, 0, LUAJIT_MODE_ENGINE|LUAJIT_MODE_OFF);
 
+    // Store debug.traceback in registry so l_PCall's error handler works.
+    // Without this, "traceback" is nil and PCall errors cause LUA_ERRERR -> PANIC.
+    lua_getglobal(L, "debug");
+    lua_getfield(L, -1, "traceback");
+    lua_setfield(L, LUA_REGISTRYINDEX, "traceback");
+    lua_pop(L, 1); // pop debug table
+
     // Callbacks
     lua_newtable(L);		// Callbacks table
     lua_pushvalue(L, -1);	// Push callbacks table
@@ -1767,6 +1791,12 @@ int main(int argc, char **argv)
     pobwindow->resize(800, 600);
     pobwindow->show();
 
+#ifdef __APPLE__
+    // Disable native fullscreen after the event loop has fully set up the NSWindow.
+    // Must NOT be called inside initializeGL() — winId() there disrupts the GL surface.
+    QTimer::singleShot(500, []() { disableNativeFullscreen(pobwindow); });
+#endif
+
     // Add the bundled fonts
     QFontDatabase::addApplicationFont(QDir::currentPath() + "/VeraMono.ttf");
     QFontDatabase::addApplicationFont(QDir::currentPath() + "/LiberationSans-Regular.ttf");

meson.build

@@ -1,11 +1,12 @@
-project('POB Frontend', 'cpp', default_options : ['cpp_std=c++17'])
+project('POB Frontend', 'cpp', 'objcpp', default_options : ['cpp_std=c++17'])
 
 qt5_dep = dependency('qt5', modules : ['Gui','Core','Widgets'])
 lua_dep = dependency('luajit')
 # NB on OSX you also need to invoke meson like so, because luajit:
 # LDFLAGS="-pagezero_size 10000 -image_base 100000000" meson pobfrontend build
+# (Note: on ARM64/Apple Silicon the above flags are NOT needed — LuaJIT uses GC64 mode)
 if build_machine.system() == 'darwin'
-   gl_dep = dependency('appleframeworks', modules: ['OpenGL'])
+   gl_dep = dependency('appleframeworks', modules: ['OpenGL', 'AppKit'])
 else
    gl_dep = dependency('gl')
 endif
@@ -14,21 +15,26 @@ curl_dep = dependency('libcurl')
 
 # Added flag based on https://stackoverflow.com/a/37729971/319066
 # and arguments based on https://mesonbuild.com/Adding-arguments.html
-compiler_arguments = ['-mmacosx-version-min=10.12', '-isysroot', '/Library/Developer/CommandLineTools/SDKs/MacOSX12.3.sdk']
-add_project_arguments(compiler_arguments , language : 'c')
-add_project_arguments(compiler_arguments, language : 'cpp')
+if build_machine.system() == 'darwin'
+   sdk_path = run_command('xcrun', '--sdk', 'macosx', '--show-sdk-path', check: true).stdout().strip()
+   compiler_arguments = ['-mmacosx-version-min=10.12', '-isysroot', sdk_path]
+   add_project_arguments(compiler_arguments, language : 'c')
+   add_project_arguments(compiler_arguments, language : 'cpp')
+   add_project_arguments(compiler_arguments, language : 'objcpp')
 
-linker_arguments = ['-mmacosx-version-min=10.12', '-isysroot', '/Library/Developer/CommandLineTools/SDKs/MacOSX12.3.sdk']
-add_project_link_arguments(linker_arguments, language : 'c')
-add_project_link_arguments(linker_arguments, language : 'cpp')
+   linker_arguments = ['-mmacosx-version-min=10.12', '-isysroot', sdk_path]
+   add_project_link_arguments(linker_arguments, language : 'c')
+   add_project_link_arguments(linker_arguments, language : 'cpp')
+   add_project_link_arguments(linker_arguments, language : 'objcpp')
+endif
 
 # Import the extension module that knows how
 # to invoke Qt tools.
 qt5 = import('qt5')
 prep = qt5.preprocess(moc_headers : ['subscript.hpp', 'pobwindow.hpp'])
 
 executable('PathOfBuilding',
-  sources : ['main.cpp', prep],
+  sources : ['main.cpp', 'macos_window.mm', prep],
   dependencies : [qt5_dep, gl_dep, zlib_dep, lua_dep, curl_dep],
   install : true)
 

pobwindow.hpp

@@ -42,6 +42,9 @@ class POBWindow : public QOpenGLWindow {
 
         connect(&updateTimer, &QTimer::timeout, this, QOverload<>::of(&POBWindow::triggerUpdate));
         updateTimer.start(100);
+
+        // macOS: disable native fullscreen (causes OpenGL context crash); green button will zoom/maximize instead
+        setFlag(Qt::WindowFullscreenButtonHint, false);
     }
 
 //    POBWindow() : QOpenGLWindow() {