Wayland fixes

CMakeLists.txt

@@ -50,6 +50,7 @@ option(GPU_DEBUG_INFO "Enable additional GPU debugging info" OFF)
 option(ENABLE_OPENGL "Enable OpenGL rendering backend" ON)
 option(ENABLE_VULKAN "Enable Vulkan rendering backend" ON)
 option(ENABLE_METAL "Enable Metal rendering backend (if available)" ON)
+option(ENABLE_WAYLAND "Enable Wayland support on Linux platforms" ON)
 option(ENABLE_LTO "Enable link-time optimization" OFF)
 option(ENABLE_TESTS "Compile unit-tests" OFF)
 option(ENABLE_USER_BUILD "Make a user-facing build. These builds have various assertions disabled, LTO, and more" OFF)
@@ -140,6 +141,10 @@ add_compile_definitions(NOMINMAX)             # Make windows.h not define min/ma
 add_compile_definitions(WIN32_LEAN_AND_MEAN)  # Make windows.h not include literally everything
 add_compile_definitions(SDL_MAIN_HANDLED)
 
+if(ENABLE_WAYLAND)
+    add_compile_definitions(WAYLAND_ENABLED)
+endif()
+
 if(ENABLE_DISCORD_RPC AND NOT ANDROID)
     add_subdirectory(third_party/discord-rpc)
     include_directories(third_party/discord-rpc/include)

src/panda_qt/main_window.cpp

@@ -24,7 +24,7 @@ MainWindow::MainWindow(QApplication* app, QWidget* parent) : QMainWindow(parent)
 	resize(800, 240 * 4);
 
 	// We pass a callback to the screen widget that will be triggered every time we resize the screen
-	screen = new ScreenWidget([this](u32 width, u32 height) { handleScreenResize(width, height); }, this);
+	screen = new ScreenWidget([this](u32 width, u32 height) { handleScreenResize(width, height); }, nullptr);
 	setCentralWidget(screen);
 
 	screen->show();

src/panda_qt/screen.cpp

@@ -29,6 +29,7 @@ ScreenWidget::ScreenWidget(ResizeCallback resizeCallback, QWidget* parent) : QWi
 	setAttribute(Qt::WA_KeyCompression, false);
 	setFocusPolicy(Qt::StrongFocus);
 	setMouseTracking(true);
+	show();
 
 	if (!createGLContext()) {
 		Helpers::panic("Failed to create GL context for display");
@@ -72,14 +73,18 @@ bool ScreenWidget::createGLContext() {
 		this->windowInfo = *windowInfo;
 
 		glContext = GL::Context::Create(*getWindowInfo(), versionsToTry);
+		if (!glContext) {
+			return false;
+		}
+
 		glContext->DoneCurrent();
 	}
 
 	return glContext != nullptr;
 }
 
 qreal ScreenWidget::devicePixelRatioFromScreen() const {
-	const QScreen* screenForRatio = window()->windowHandle()->screen();
+	const QScreen* screenForRatio = windowHandle()->screen();
 	if (!screenForRatio) {
 		screenForRatio = QGuiApplication::primaryScreen();
 	}