From fbcc6a346b81a04f8a5f1a8a05aa973a58a64fc7 Mon Sep 17 00:00:00 2001
From: Eirik Aavitsland <eirik.aavitsland@qt.io>
Date: Wed, 9 Dec 2020 17:16:03 +0100
Subject: [PATCH] Avoid overflowing QFixed in text layout

Fixes: QTBUG-89172
Change-Id: Icb78c8eeb1dbe4c5d4c6476beebafc0115a91e8c
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
(cherry picked from commit 36ccbee34e89d185918a2925444dac11211e5c60)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/gui/text/qtextlayout.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gui/text/qtextlayout.cpp b/src/gui/text/qtextlayout.cpp
index 6c18c53bca6..d303219bb9c 100644
--- a/src/gui/text/qtextlayout.cpp
+++ b/src/gui/text/qtextlayout.cpp
@@ -2510,6 +2510,9 @@ void QTextLine::draw_internal(QPainter *p, const QPointF &pos,
         return;
     }
 
+    static QRectF maxFixedRect(QPointF(-QFIXED_MAX, -QFIXED_MAX), QPointF(QFIXED_MAX, QFIXED_MAX));
+    if (!maxFixedRect.contains(pos))
+        return;
 
     QTextLineItemIterator iterator(eng, index, pos, selection);
     QFixed lineBase = line.base();