Qt: Add screen resize

include/panda_qt/main_window.hpp

@@ -50,6 +50,7 @@ class MainWindow : public QMainWindow {
 		PressTouchscreen,
 		ReleaseTouchscreen,
 		ReloadUbershader,
+		SetScreenSize,
 	};
 
 	// Tagged union representing our message queue messages
@@ -81,6 +82,11 @@ class MainWindow : public QMainWindow {
 				u16 x;
 				u16 y;
 			} touchscreen;
+
+			struct {
+				u32 width;
+				u32 height;
+			} screenSize;
 		};
 	};
 
@@ -141,4 +147,6 @@ class MainWindow : public QMainWindow {
 	void loadLuaScript(const std::string& code);
 	void reloadShader(const std::string& shader);
 	void editCheat(u32 handle, const std::vector<uint8_t>& cheat, const std::function<void(u32)>& callback);
+
+	void handleScreenResize(u32 width, u32 height);
 };

include/panda_qt/screen.hpp

@@ -11,11 +11,20 @@ class ScreenWidget : public QWidget {
 
   public:
 	ScreenWidget(QWidget* parent = nullptr);
+	void resizeEvent(QResizeEvent* event) override;
+	// Called by the emulator thread for resizing the actual GL surface, since the emulator thread owns the GL context
+	void resizeSurface(u32 width, u32 height);
+
 	GL::Context* getGLContext() { return glContext.get(); }
 
 	// Dimensions of our output surface
 	u32 surfaceWidth = 0;
 	u32 surfaceHeight = 0;
+	WindowInfo windowInfo;
+
+	// Cached "previous" dimensions, used when resizing our window
+	u32 previousWidth = 0;
+	u32 previousHeight = 0;
 
   private:
 	std::unique_ptr<GL::Context> glContext = nullptr;