diff options
Diffstat (limited to 'src/plugins/platforms/xcb/qxcbconnection.h')
| -rw-r--r-- | src/plugins/platforms/xcb/qxcbconnection.h | 483 |
1 files changed, 42 insertions, 441 deletions
diff --git a/src/plugins/platforms/xcb/qxcbconnection.h b/src/plugins/platforms/xcb/qxcbconnection.h index c9dde35558..5d53b97d37 100644 --- a/src/plugins/platforms/xcb/qxcbconnection.h +++ b/src/plugins/platforms/xcb/qxcbconnection.h @@ -47,42 +47,18 @@ #include "qxcbexport.h" #include <QHash> #include <QList> -#include <QMutex> -#include <QObject> -#include <QThread> #include <QVector> -#include <QVarLengthArray> #include <qpa/qwindowsysteminterface.h> #include <QtCore/QLoggingCategory> #include <QtCore/private/qglobal_p.h> -#include <cstdlib> -#include <memory> - -// This is needed to make Qt compile together with XKB. xkb.h is using a variable -// which is called 'explicit', this is a reserved keyword in c++ -#if QT_CONFIG(xkb) -#define explicit dont_use_cxx_explicit -#include <xcb/xkb.h> -#undef explicit -#endif +#include "qxcbeventqueue.h" +#include "qxcbconnection_basic.h" #if QT_CONFIG(tabletevent) #include <QTabletEvent> #endif -#if QT_CONFIG(xinput2) -#include <X11/extensions/XI2.h> -#ifdef XIScrollClass -#define XCB_USE_XINPUT21 // XI 2.1 adds smooth scrolling support -#ifdef XI_TouchBeginMask -#define XCB_USE_XINPUT22 // XI 2.2 adds multi-point touch support -#endif -#endif -#endif // QT_CONFIG(xinput2) - -struct xcb_randr_get_output_info_reply_t; - QT_BEGIN_NAMESPACE Q_DECLARE_LOGGING_CATEGORY(lcQpaXInput) @@ -90,9 +66,10 @@ Q_DECLARE_LOGGING_CATEGORY(lcQpaXInputDevices) Q_DECLARE_LOGGING_CATEGORY(lcQpaXInputEvents) Q_DECLARE_LOGGING_CATEGORY(lcQpaScreen) Q_DECLARE_LOGGING_CATEGORY(lcQpaEvents) -Q_DECLARE_LOGGING_CATEGORY(lcQpaXcb) Q_DECLARE_LOGGING_CATEGORY(lcQpaPeeker) Q_DECLARE_LOGGING_CATEGORY(lcQpaKeyboard) +Q_DECLARE_LOGGING_CATEGORY(lcQpaXDnd) +Q_DECLARE_LOGGING_CATEGORY(lcQpaEventReader) class QXcbVirtualDesktop; class QXcbScreen; @@ -105,248 +82,11 @@ class QXcbNativeInterface; class QXcbSystemTrayTracker; class QXcbGlIntegration; -namespace QXcbAtom { - enum Atom { - // window-manager <-> client protocols - WM_PROTOCOLS, - WM_DELETE_WINDOW, - WM_TAKE_FOCUS, - _NET_WM_PING, - _NET_WM_CONTEXT_HELP, - _NET_WM_SYNC_REQUEST, - _NET_WM_SYNC_REQUEST_COUNTER, - MANAGER, // System tray notification - _NET_SYSTEM_TRAY_OPCODE, // System tray operation - - // ICCCM window state - WM_STATE, - WM_CHANGE_STATE, - WM_CLASS, - WM_NAME, - - // Session management - WM_CLIENT_LEADER, - WM_WINDOW_ROLE, - SM_CLIENT_ID, - - // Clipboard - CLIPBOARD, - INCR, - TARGETS, - MULTIPLE, - TIMESTAMP, - SAVE_TARGETS, - CLIP_TEMPORARY, - _QT_SELECTION, - _QT_CLIPBOARD_SENTINEL, - _QT_SELECTION_SENTINEL, - CLIPBOARD_MANAGER, - - RESOURCE_MANAGER, - - _XSETROOT_ID, - - _QT_SCROLL_DONE, - _QT_INPUT_ENCODING, - - // Qt/XCB specific - _QT_CLOSE_CONNECTION, - - _MOTIF_WM_HINTS, - - DTWM_IS_RUNNING, - ENLIGHTENMENT_DESKTOP, - _DT_SAVE_MODE, - _SGI_DESKS_MANAGER, - - // EWMH (aka NETWM) - _NET_SUPPORTED, - _NET_VIRTUAL_ROOTS, - _NET_WORKAREA, - - _NET_MOVERESIZE_WINDOW, - _NET_WM_MOVERESIZE, - - _NET_WM_NAME, - _NET_WM_ICON_NAME, - _NET_WM_ICON, - - _NET_WM_PID, - - _NET_WM_WINDOW_OPACITY, - - _NET_WM_STATE, - _NET_WM_STATE_ABOVE, - _NET_WM_STATE_BELOW, - _NET_WM_STATE_FULLSCREEN, - _NET_WM_STATE_MAXIMIZED_HORZ, - _NET_WM_STATE_MAXIMIZED_VERT, - _NET_WM_STATE_MODAL, - _NET_WM_STATE_STAYS_ON_TOP, - _NET_WM_STATE_DEMANDS_ATTENTION, - - _NET_WM_USER_TIME, - _NET_WM_USER_TIME_WINDOW, - _NET_WM_FULL_PLACEMENT, - - _NET_WM_WINDOW_TYPE, - _NET_WM_WINDOW_TYPE_DESKTOP, - _NET_WM_WINDOW_TYPE_DOCK, - _NET_WM_WINDOW_TYPE_TOOLBAR, - _NET_WM_WINDOW_TYPE_MENU, - _NET_WM_WINDOW_TYPE_UTILITY, - _NET_WM_WINDOW_TYPE_SPLASH, - _NET_WM_WINDOW_TYPE_DIALOG, - _NET_WM_WINDOW_TYPE_DROPDOWN_MENU, - _NET_WM_WINDOW_TYPE_POPUP_MENU, - _NET_WM_WINDOW_TYPE_TOOLTIP, - _NET_WM_WINDOW_TYPE_NOTIFICATION, - _NET_WM_WINDOW_TYPE_COMBO, - _NET_WM_WINDOW_TYPE_DND, - _NET_WM_WINDOW_TYPE_NORMAL, - _KDE_NET_WM_WINDOW_TYPE_OVERRIDE, - - _KDE_NET_WM_FRAME_STRUT, - _NET_FRAME_EXTENTS, - - _NET_STARTUP_INFO, - _NET_STARTUP_INFO_BEGIN, - - _NET_SUPPORTING_WM_CHECK, - - _NET_WM_CM_S0, - - _NET_SYSTEM_TRAY_VISUAL, - - _NET_ACTIVE_WINDOW, - - // Property formats - TEXT, - UTF8_STRING, - CARDINAL, - - // Xdnd - XdndEnter, - XdndPosition, - XdndStatus, - XdndLeave, - XdndDrop, - XdndFinished, - XdndTypelist, - XdndActionList, - - XdndSelection, - - XdndAware, - XdndProxy, - - XdndActionCopy, - XdndActionLink, - XdndActionMove, - XdndActionPrivate, - - // Motif DND - _MOTIF_DRAG_AND_DROP_MESSAGE, - _MOTIF_DRAG_INITIATOR_INFO, - _MOTIF_DRAG_RECEIVER_INFO, - _MOTIF_DRAG_WINDOW, - _MOTIF_DRAG_TARGETS, - - XmTRANSFER_SUCCESS, - XmTRANSFER_FAILURE, - - // Xkb - _XKB_RULES_NAMES, - - // XEMBED - _XEMBED, - _XEMBED_INFO, - - // XInput2 - ButtonLeft, - ButtonMiddle, - ButtonRight, - ButtonWheelUp, - ButtonWheelDown, - ButtonHorizWheelLeft, - ButtonHorizWheelRight, - AbsMTPositionX, - AbsMTPositionY, - AbsMTTouchMajor, - AbsMTTouchMinor, - AbsMTOrientation, - AbsMTPressure, - AbsMTTrackingID, - MaxContacts, - RelX, - RelY, - // XInput2 tablet - AbsX, - AbsY, - AbsPressure, - AbsTiltX, - AbsTiltY, - AbsWheel, - AbsDistance, - WacomSerialIDs, - INTEGER, - RelHorizWheel, - RelVertWheel, - RelHorizScroll, - RelVertScroll, - - _XSETTINGS_SETTINGS, - - _COMPIZ_DECOR_PENDING, - _COMPIZ_DECOR_REQUEST, - _COMPIZ_DECOR_DELETE_PIXMAP, - _COMPIZ_TOOLKIT_ACTION, - _GTK_LOAD_ICONTHEMES, - - NPredefinedAtoms, - - _QT_SETTINGS_TIMESTAMP = NPredefinedAtoms, - NAtoms - }; -} - -typedef QVarLengthArray<xcb_generic_event_t *, 64> QXcbEventArray; - -class QXcbConnection; -class QXcbEventReader : public QThread -{ - Q_OBJECT -public: - QXcbEventReader(QXcbConnection *connection); - - void run() override; - - QXcbEventArray *lock(); - void unlock(); - - void start(); - - void registerEventDispatcher(QAbstractEventDispatcher *dispatcher); - -signals: - void eventPending(); - -private slots: - void registerForEvents(); - -private: - void addEvent(xcb_generic_event_t *event); - - QMutex m_mutex; - QXcbEventArray m_events; - QXcbConnection *m_connection; -}; - class QXcbWindowEventListener { public: virtual ~QXcbWindowEventListener() {} - virtual bool handleGenericEvent(xcb_generic_event_t *, long *) { return false; } + virtual bool handleNativeEvent(xcb_generic_event_t *) { return false; } virtual void handleExposeEvent(const xcb_expose_event_t *) {} virtual void handleClientMessageEvent(const xcb_client_message_event_t *) {} @@ -362,7 +102,7 @@ public: virtual void handleFocusInEvent(const xcb_focus_in_event_t *) {} virtual void handleFocusOutEvent(const xcb_focus_out_event_t *) {} virtual void handlePropertyNotifyEvent(const xcb_property_notify_event_t *) {} -#if QT_CONFIG(xinput2) +#if QT_CONFIG(xcb_xinput) virtual void handleXIMouseEvent(xcb_ge_event_t *, Qt::MouseEventSource = Qt::MouseEventNotSynthesized) {} virtual void handleXIEnterLeave(xcb_ge_event_t *) {} #endif @@ -383,8 +123,7 @@ private: QXcbWindow *m_window; }; -class QAbstractEventDispatcher; -class Q_XCB_EXPORT QXcbConnection : public QObject +class Q_XCB_EXPORT QXcbConnection : public QXcbBasicConnection { Q_OBJECT public: @@ -392,22 +131,15 @@ public: ~QXcbConnection(); QXcbConnection *connection() const { return const_cast<QXcbConnection *>(this); } - bool isConnected() const; + QXcbEventQueue *eventQueue() const { return m_eventQueue; } const QList<QXcbVirtualDesktop *> &virtualDesktops() const { return m_virtualDesktops; } const QList<QXcbScreen *> &screens() const { return m_screens; } - int primaryScreenNumber() const { return m_primaryScreenNumber; } - QXcbVirtualDesktop *primaryVirtualDesktop() const { return m_virtualDesktops.value(m_primaryScreenNumber); } + QXcbVirtualDesktop *primaryVirtualDesktop() const { + return m_virtualDesktops.value(primaryScreenNumber()); + } QXcbScreen *primaryScreen() const; - inline xcb_atom_t atom(QXcbAtom::Atom atom) const { return m_allAtoms[atom]; } - QXcbAtom::Atom qatom(xcb_atom_t atom) const; - xcb_atom_t internAtom(const char *name); - QByteArray atomName(xcb_atom_t atom); - - const char *displayName() const { return m_displayName.constData(); } - xcb_connection_t *xcb_connection() const { return m_connection; } - const xcb_setup_t *setup() const { return m_setup; } const xcb_format_t *formatForDepth(uint8_t depth) const; bool imageNeedsEndianSwap() const @@ -415,9 +147,9 @@ public: if (!hasShm()) return false; // The non-Shm path does its own swapping #if Q_BYTE_ORDER == Q_BIG_ENDIAN - return m_setup->image_byte_order != XCB_IMAGE_ORDER_MSB_FIRST; + return setup()->image_byte_order != XCB_IMAGE_ORDER_MSB_FIRST; #else - return m_setup->image_byte_order != XCB_IMAGE_ORDER_LSB_FIRST; + return setup()->image_byte_order != XCB_IMAGE_ORDER_LSB_FIRST; #endif } @@ -437,10 +169,6 @@ public: bool hasDefaultVisualId() const { return m_defaultVisualId != UINT_MAX; } xcb_visualid_t defaultVisualId() const { return m_defaultVisualId; } -#if QT_CONFIG(xcb_xlib) - void *xlib_display() const; - void *createVisualInfoForDefaultVisualId() const; -#endif void sync(); void handleXcbError(xcb_generic_error_t *error); @@ -454,45 +182,15 @@ public: QXcbWindowEventListener *windowEventListenerFromId(xcb_window_t id); QXcbWindow *platformWindowFromId(xcb_window_t id); - template<typename T> - inline xcb_generic_event_t *checkEvent(T &checker); - typedef bool (*PeekFunc)(QXcbConnection *, xcb_generic_event_t *); void addPeekFunc(PeekFunc f); - // Peek at all queued events - qint32 generatePeekerId(); - bool removePeekerId(qint32 peekerId); - enum PeekOption { PeekDefault = 0, PeekFromCachedIndex = 1 }; // see qx11info_x11.h - Q_DECLARE_FLAGS(PeekOptions, PeekOption) - typedef bool (*PeekerCallback)(xcb_generic_event_t *event, void *peekerData); - bool peekEventQueue(PeekerCallback peeker, void *peekerData = nullptr, - PeekOptions option = PeekDefault, qint32 peekerId = -1); - inline xcb_timestamp_t time() const { return m_time; } inline void setTime(xcb_timestamp_t t) { if (t > m_time) m_time = t; } inline xcb_timestamp_t netWmUserTime() const { return m_netWmUserTime; } inline void setNetWmUserTime(xcb_timestamp_t t) { if (t > m_netWmUserTime) m_netWmUserTime = t; } - bool hasXFixes() const { return has_xfixes; } - bool hasXShape() const { return has_shape_extension; } - bool hasXRandr() const { return has_randr_extension; } - bool hasInputShape() const { return has_input_shape; } - bool hasXKB() const { return has_xkb; } - bool hasXRender(int major = -1, int minor = -1) const - { - if (has_render_extension && major != -1 && minor != -1) - return m_xrenderVersion >= qMakePair(major, minor); - - return has_render_extension; - } - bool hasXInput2() const { return m_xi2Enabled; } - bool hasShm() const { return has_shm; } - bool hasShmFd() const { return has_shm_fd; } - - bool threadedEventHandling() const { return m_reader->isRunning(); } - xcb_timestamp_t getTimestamp(); xcb_window_t getSelectionOwner(xcb_atom_t atom) const; xcb_window_t getQtSelectionOwner(); @@ -522,53 +220,37 @@ public: QXcbNativeInterface *nativeInterface() const { return m_nativeInterface; } QXcbSystemTrayTracker *systemTrayTracker() const; - static bool xEmbedSystemTrayAvailable(); - static bool xEmbedSystemTrayVisualHasAlphaChannel(); -#if QT_CONFIG(xinput2) + Qt::MouseButtons queryMouseButtons() const; + Qt::KeyboardModifiers queryKeyboardModifiers() const; + + bool isUserInputEvent(xcb_generic_event_t *event) const; + +#if QT_CONFIG(xcb_xinput) void xi2SelectStateEvents(); void xi2SelectDeviceEvents(xcb_window_t window); void xi2SelectDeviceEventsCompatibility(xcb_window_t window); bool xi2SetMouseGrabEnabled(xcb_window_t w, bool grab); bool xi2MouseEventsDisabled() const; - bool isAtLeastXI21() const { return m_xi2Enabled && m_xi2Minor >= 1; } - bool isAtLeastXI22() const { return m_xi2Enabled && m_xi2Minor >= 2; } Qt::MouseButton xiToQtMouseButton(uint32_t b); -#ifdef XCB_USE_XINPUT21 void xi2UpdateScrollingDevices(); -#endif -#ifdef XCB_USE_XINPUT22 bool startSystemMoveResizeForTouchBegin(xcb_window_t window, const QPoint &point, int corner); void abortSystemMoveResizeForTouch(); bool isTouchScreen(int id); #endif -#endif - QXcbEventReader *eventReader() const { return m_reader; } bool canGrab() const { return m_canGrabServer; } - QXcbGlIntegration *glIntegration() const { return m_glIntegration; } + QXcbGlIntegration *glIntegration() const; + + void flush() { xcb_flush(xcb_connection()); } + void processXcbEvents(QEventLoop::ProcessEventsFlags flags); protected: bool event(QEvent *e) override; -public slots: - void flush() { xcb_flush(m_connection); } - -private slots: - void processXcbEvents(); - private: - void initializeAllAtoms(); - void sendConnectionEvent(QXcbAtom::Atom atom, uint id = 0); - void initializeShm(); - void initializeXFixes(); - void initializeXRender(); - void initializeXRandr(); - void initializeXinerama(); - void initializeXShape(); - void initializeXKB(); - void handleClientMessageEvent(const xcb_client_message_event_t *event); + void xrandrSelectEvents(); QXcbScreen* findScreenForCrtc(xcb_window_t rootWindow, xcb_randr_crtc_t crtc) const; QXcbScreen* findScreenForOutput(xcb_window_t rootWindow, xcb_randr_output_t output) const; QXcbVirtualDesktop* virtualDesktopForRootWindow(xcb_window_t rootWindow) const; @@ -580,12 +262,9 @@ private: xcb_randr_get_output_info_reply_t *outputInfo); void destroyScreen(QXcbScreen *screen); void initializeScreens(); - bool compressEvent(xcb_generic_event_t *event, int currentIndex, QXcbEventArray *eventqueue) const; + bool compressEvent(xcb_generic_event_t *event) const; - bool m_xi2Enabled = false; -#if QT_CONFIG(xinput2) - int m_xi2Minor = -1; - void initializeXInput2(); +#if QT_CONFIG(xcb_xinput) void xi2SetupDevice(void *info, bool removeExisting = true); void xi2SetupDevices(); struct TouchDeviceData { @@ -611,10 +290,7 @@ private: void xi2HandleEvent(xcb_ge_event_t *event); void xi2HandleHierarchyEvent(void *event); void xi2HandleDeviceChangedEvent(void *event); - int m_xiOpCode, m_xiEventBase, m_xiErrorBase; -#ifdef XCB_USE_XINPUT22 void xi2ProcessTouch(void *xiDevEvent, QXcbWindow *platformWindow); -#endif // XCB_USE_XINPUT22 #if QT_CONFIG(tabletevent) struct TabletData { int deviceId = 0; @@ -649,32 +325,30 @@ private: QPointF lastScrollPosition; }; QHash<int, ScrollingDevice> m_scrollingDevices; -#ifdef XCB_USE_XINPUT21 void xi2HandleScrollEvent(void *event, ScrollingDevice &scrollingDevice); void xi2UpdateScrollingDevice(ScrollingDevice &scrollingDevice); ScrollingDevice *scrollingDeviceForId(int id); -#endif static bool xi2GetValuatorValueIfSet(const void *event, int valuatorNum, double *value); - static void xi2PrepareXIGenericDeviceEvent(xcb_ge_event_t *event); -#endif - xcb_connection_t *m_connection = nullptr; - const xcb_setup_t *m_setup = nullptr; + QHash<int, TouchDeviceData> m_touchDevices; + struct StartSystemMoveResizeInfo { + xcb_window_t window = XCB_NONE; + uint16_t deviceid; + uint32_t pointid; + int corner; + } m_startSystemMoveResizeInfo; +#endif // QT_CONFIG(xcb_xinput) + const bool m_canGrabServer; const xcb_visualid_t m_defaultVisualId; QList<QXcbVirtualDesktop *> m_virtualDesktops; QList<QXcbScreen *> m_screens; - int m_primaryScreenNumber = 0; - - xcb_atom_t m_allAtoms[QXcbAtom::NAtoms]; xcb_timestamp_t m_time = XCB_CURRENT_TIME; xcb_timestamp_t m_netWmUserTime = XCB_CURRENT_TIME; - QByteArray m_displayName; - QXcbKeyboard *m_keyboard = nullptr; #ifndef QT_NO_CLIPBOARD QXcbClipboard *m_clipboard = nullptr; @@ -685,42 +359,12 @@ private: QScopedPointer<QXcbWMSupport> m_wmSupport; QXcbNativeInterface *m_nativeInterface = nullptr; -#if QT_CONFIG(xcb_xlib) - void *m_xlib_display = nullptr; -#endif - QXcbEventReader *m_reader = nullptr; + QXcbEventQueue *m_eventQueue = nullptr; -#if QT_CONFIG(xinput2) - QHash<int, TouchDeviceData> m_touchDevices; -#ifdef XCB_USE_XINPUT22 - struct StartSystemMoveResizeInfo { - xcb_window_t window = XCB_NONE; - uint16_t deviceid; - uint32_t pointid; - int corner; - } m_startSystemMoveResizeInfo; -#endif -#endif WindowMapper m_mapper; QVector<PeekFunc> m_peekFuncs; - uint32_t xfixes_first_event = 0; - uint32_t xrandr_first_event = 0; - uint32_t xkb_first_event = 0; - - bool has_xfixes = false; - bool has_xinerama_extension = false; - bool has_shape_extension = false; - bool has_randr_extension = false; - bool has_input_shape; - bool has_xkb = false; - bool has_render_extension = false; - bool has_shm = false; - bool has_shm_fd = false; - - QPair<int, int> m_xrenderVersion; - Qt::MouseButtons m_buttonState = 0; Qt::MouseButton m_button = Qt::NoButton; @@ -731,44 +375,24 @@ private: xcb_window_t m_clientLeader = 0; QByteArray m_startupId; QXcbSystemTrayTracker *m_systemTrayTracker = nullptr; - QXcbGlIntegration *m_glIntegration = nullptr; + mutable QXcbGlIntegration *m_glIntegration = nullptr; + mutable bool m_glIntegrationInitialized = false; bool m_xiGrab = false; QVector<int> m_xiMasterPointerIds; xcb_window_t m_qtSelectionOwner = 0; - bool m_mainEventLoopFlushedQueue = false; - qint32 m_peekerIdSource = 0; - bool m_peekerIndexCacheDirty = false; - QHash<qint32, qint32> m_peekerToCachedIndex; - friend class QXcbEventReader; + friend class QXcbEventQueue; QByteArray m_xdgCurrentDesktop; }; -#if QT_CONFIG(xinput2) +#if QT_CONFIG(xcb_xinput) #if QT_CONFIG(tabletevent) Q_DECLARE_TYPEINFO(QXcbConnection::TabletData::ValuatorClassInfo, Q_PRIMITIVE_TYPE); Q_DECLARE_TYPEINFO(QXcbConnection::TabletData, Q_MOVABLE_TYPE); #endif #endif -template<typename T> -xcb_generic_event_t *QXcbConnection::checkEvent(T &checker) -{ - QXcbEventArray *eventqueue = m_reader->lock(); - - for (int i = 0; i < eventqueue->size(); ++i) { - xcb_generic_event_t *event = eventqueue->at(i); - if (checker.checkEvent(event)) { - (*eventqueue)[i] = 0; - m_reader->unlock(); - return event; - } - } - m_reader->unlock(); - return 0; -} - class QXcbConnectionGrabber { public: @@ -779,34 +403,11 @@ private: QXcbConnection *m_connection; }; -#define Q_XCB_REPLY_CONNECTION_ARG(connection, ...) connection - -struct QStdFreeDeleter { - void operator()(void *p) const Q_DECL_NOTHROW { return std::free(p); } -}; - -#define Q_XCB_REPLY(call, ...) \ - std::unique_ptr<call##_reply_t, QStdFreeDeleter>( \ - call##_reply(Q_XCB_REPLY_CONNECTION_ARG(__VA_ARGS__), call(__VA_ARGS__), nullptr) \ - ) - -#define Q_XCB_REPLY_UNCHECKED(call, ...) \ - std::unique_ptr<call##_reply_t, QStdFreeDeleter>( \ - call##_reply(Q_XCB_REPLY_CONNECTION_ARG(__VA_ARGS__), call##_unchecked(__VA_ARGS__), nullptr) \ - ) - -template <typename T> -union q_padded_xcb_event { - T event; - char padding[32]; -}; - // The xcb_send_event() requires all events to have 32 bytes. It calls memcpy() on the // passed in event. If the passed in event is less than 32 bytes, memcpy() reaches into // unrelated memory. -#define Q_DECLARE_XCB_EVENT(event_var, event_type) \ - q_padded_xcb_event<event_type> store = {}; \ - auto &event_var = store.event; +template <typename T> +struct alignas(32) q_padded_xcb_event : T { }; QT_END_NAMESPACE |