50 lines
1.8 KiB
Diff
50 lines
1.8 KiB
Diff
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diff --git a/src/gui/painting/qfixed_p.h b/src/gui/painting/qfixed_p.h
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index 84659288..57d750a4 100644
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--- a/src/gui/painting/qfixed_p.h
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+++ b/src/gui/painting/qfixed_p.h
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@@ -54,6 +54,7 @@
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#include <QtGui/private/qtguiglobal_p.h>
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#include "QtCore/qdebug.h"
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#include "QtCore/qpoint.h"
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+#include <QtCore/private/qnumeric_p.h>
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#include "QtCore/qsize.h"
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QT_BEGIN_NAMESPACE
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@@ -182,6 +183,14 @@ Q_DECL_CONSTEXPR inline bool operator<(int i, const QFixed &f) { return i * 64 <
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Q_DECL_CONSTEXPR inline bool operator>(const QFixed &f, int i) { return f.value() > i * 64; }
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Q_DECL_CONSTEXPR inline bool operator>(int i, const QFixed &f) { return i * 64 > f.value(); }
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+inline bool qAddOverflow(QFixed v1, QFixed v2, QFixed *r)
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+{
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+ int val;
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+ bool result = add_overflow(v1.value(), v2.value(), &val);
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+ r->setValue(val);
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+ return result;
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+}
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+
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#ifndef QT_NO_DEBUG_STREAM
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inline QDebug &operator<<(QDebug &dbg, const QFixed &f)
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{ return dbg << f.toReal(); }
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diff --git a/src/gui/text/qtextlayout.cpp b/src/gui/text/qtextlayout.cpp
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index 26ac37b0..f6c69ff4 100644
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--- a/src/gui/text/qtextlayout.cpp
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+++ b/src/gui/text/qtextlayout.cpp
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@@ -2150,11 +2150,14 @@ found:
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eng->maxWidth = qMax(eng->maxWidth, line.textWidth);
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} else {
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eng->minWidth = qMax(eng->minWidth, lbh.minw);
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- eng->maxWidth += line.textWidth;
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+ if (qAddOverflow(eng->maxWidth, line.textWidth, &eng->maxWidth))
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+ eng->maxWidth = QFIXED_MAX;
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}
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- if (line.textWidth > 0 && item < eng->layoutData->items.size())
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- eng->maxWidth += lbh.spaceData.textWidth;
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+ if (line.textWidth > 0 && item < eng->layoutData->items.size()) {
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+ if (qAddOverflow(eng->maxWidth, lbh.spaceData.textWidth, &eng->maxWidth))
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+ eng->maxWidth = QFIXED_MAX;
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+ }
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line.textWidth += trailingSpace;
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if (lbh.spaceData.length) {
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