Qt: Forward text input to aux render windows

Fixes text input in freecam window.

src/duckstation-qt/displaywidget.cpp

@@ -497,12 +497,32 @@ bool AuxiliaryDisplayWidget::event(QEvent* event)
     case QEvent::KeyPress:
     case QEvent::KeyRelease:
     {
+      const QKeyEvent* key_event = static_cast<const QKeyEvent*>(event);
+
+      if (type == QEvent::KeyPress)
+      {
+        // note this won't work for emojis.. deal with that if it's ever needed
+        for (const QChar& ch : key_event->text())
+        {
+          // Don't forward backspace characters. We send the backspace as a normal key event,
+          // so if we send the character too, it double-deletes.
+          if (ch == QChar('\b'))
+            break;
+
+          g_emu_thread->queueAuxiliaryRenderWindowInputEvent(
+            m_userdata, Host::AuxiliaryRenderWindowEvent::TextEntered,
+            Host::AuxiliaryRenderWindowEventParam{.uint_param = static_cast<u32>(ch.unicode())});
+        }
+      }
+
+      if (key_event->isAutoRepeat())
+        return true;
+
       g_emu_thread->queueAuxiliaryRenderWindowInputEvent(
         m_userdata,
         (type == QEvent::KeyPress) ? Host::AuxiliaryRenderWindowEvent::KeyPressed :
                                      Host::AuxiliaryRenderWindowEvent::KeyReleased,
-        Host::AuxiliaryRenderWindowEventParam{.uint_param =
-                                                static_cast<u32>(static_cast<const QKeyEvent*>(event)->key())});
+        Host::AuxiliaryRenderWindowEventParam{.uint_param = static_cast<u32>(key_event->key())});
 
       return true;
     }

src/util/imgui_manager.cpp

@@ -1534,6 +1534,12 @@ void ImGuiManager::ProcessAuxiliaryRenderWindowInputEvent(Host::AuxiliaryRenderW
     }
     break;
 
+    case Host::AuxiliaryRenderWindowEvent::TextEntered:
+    {
+      io.AddInputCharacter(param1.uint_param);
+    }
+    break;
+
     case Host::AuxiliaryRenderWindowEvent::MouseMoved:
     {
       io.MousePos.x = param1.float_param;

src/util/imgui_manager.h

@@ -33,6 +33,7 @@ enum class AuxiliaryRenderWindowEvent : u8
   Resized,
   KeyPressed,
   KeyReleased,
+  TextEntered,
   MouseMoved,
   MousePressed,
   MouseReleased,