libqt5-qtbase/big-endian-scroll.patch

From 2c828bf5d4a0332ecece29e4513ae4b0a4a78d08 Mon Sep 17 00:00:00 2001
From: q66 <daniel@octaforge.org>
Date: Mon, 3 Apr 2023 14:36:51 +0200
Subject: [PATCH] Fix scrolling on big endian platforms

The mask is defined as an array of 4*CARD8, but libxcb and Qt treat
it as array of CARD32, but that only works on little endian platforms.

Qt 6 switched to the array of 4*CARD8 representation, but that change is rather
complex for a backport but fortunately also not needed because 5.x only uses
32 bits. Use a little-endian CARD32 to have the same effect as 4*CARD8.

The initial diff is from https://github.com/void-linux/void-packages/pull/13901,
which is assumed to be the original source.

Fabian Vogt <fvogt@suse.de> added a patch header, description and also fixed
QXcbConnection::xi2SetMouseGrabEnabled.

Fixes: https://bugreports.qt.io/browse/QTBUG-105157
---
 src/plugins/platforms/xcb/qxcbconnection_xi2.cpp | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp b/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp
index 27a2526df..cda10b39a 100644
--- a/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp
+++ b/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp
@@ -43,6 +43,7 @@
 #include "qxcbwindow.h"
 #include "qtouchdevice.h"
 #include "QtCore/qmetaobject.h"
+#include "QtCore/qendian.h"
 #include <qpa/qwindowsysteminterface_p.h>
 #include <QDebug>
 #include <cmath>
@@ -66,6 +67,7 @@ void QXcbConnection::xi2SelectStateEvents()
     xiEventMask.mask = XCB_INPUT_XI_EVENT_MASK_HIERARCHY;
     xiEventMask.mask |= XCB_INPUT_XI_EVENT_MASK_DEVICE_CHANGED;
     xiEventMask.mask |= XCB_INPUT_XI_EVENT_MASK_PROPERTY;
+    xiEventMask.mask = qToLittleEndian(xiEventMask.mask);
     xcb_input_xi_select_events(xcb_connection(), rootWindow(), 1, &xiEventMask.header);
 }
 
@@ -90,7 +92,7 @@ void QXcbConnection::xi2SelectDeviceEvents(xcb_window_t window)
     qt_xcb_input_event_mask_t mask;
     mask.header.deviceid = XCB_INPUT_DEVICE_ALL_MASTER;
     mask.header.mask_len = 1;
-    mask.mask = bitMask;
+    mask.mask = qToLittleEndian(bitMask);
     xcb_void_cookie_t cookie =
             xcb_input_xi_select_events_checked(xcb_connection(), window, 1, &mask.header);
     xcb_generic_error_t *error = xcb_request_check(xcb_connection(), cookie);
@@ -363,7 +365,7 @@ void QXcbConnection::xi2SelectDeviceEventsCompatibility(xcb_window_t window)
         qt_xcb_input_event_mask_t xiMask;
         xiMask.header.deviceid = XCB_INPUT_DEVICE_ALL_MASTER;
         xiMask.header.mask_len = 1;
-        xiMask.mask = mask;
+        xiMask.mask = qToLittleEndian(mask);
 
         xcb_void_cookie_t cookie =
                 xcb_input_xi_select_events_checked(xcb_connection(), window, 1, &xiMask.header);
@@ -390,7 +392,7 @@ void QXcbConnection::xi2SelectDeviceEventsCompatibility(xcb_window_t window)
             tabletDevices.insert(deviceId);
             xiEventMask[i].header.deviceid = deviceId;
             xiEventMask[i].header.mask_len = 1;
-            xiEventMask[i].mask = mask;
+            xiEventMask[i].mask = qToLittleEndian(mask);
         }
         xcb_input_xi_select_events(xcb_connection(), window, nrTablets, &(xiEventMask.data()->header));
     }
@@ -406,7 +408,7 @@ void QXcbConnection::xi2SelectDeviceEventsCompatibility(xcb_window_t window)
 #endif
             xiEventMask[i].header.deviceid = scrollingDevice.deviceId;
             xiEventMask[i].header.mask_len = 1;
-            xiEventMask[i].mask = mask;
+            xiEventMask[i].mask = qToLittleEndian(mask);
             i++;
         }
         xcb_input_xi_select_events(xcb_connection(), window, i, &(xiEventMask.data()->header));
@@ -826,6 +828,8 @@ bool QXcbConnection::xi2SetMouseGrabEnabled(xcb_window_t w, bool grab)
                 | XCB_INPUT_XI_EVENT_MASK_TOUCH_UPDATE
                 | XCB_INPUT_XI_EVENT_MASK_TOUCH_END;
 
+        mask = qToLittleEndian(mask);
+
         for (int id : qAsConst(m_xiMasterPointerIds)) {
             xcb_generic_error_t *error = nullptr;
             auto cookie = xcb_input_xi_grab_device(xcb_connection(), w, XCB_CURRENT_TIME, XCB_CURSOR_NONE, id,
-- 
2.40.1