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Fix specific overflow in qtextlayout

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Adds qAddOverflow and qMulOverflow definitions to QFixed

Fixes: QTBUG-113337
Change-Id: I13579306defceaccdc0fbb1ec0e9b77c6f8d1af9
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 7b7a01c266b507636eab51a36328c7c72d82d93c)
Reviewed-by: Michael Brüning <michael.bruning@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
This commit is contained in:
Allan Sandfeld Jensen 2023-05-05 09:51:32 +02:00 committed by Michal Klocek
parent be0a975a85
commit 3ef2308347
3 changed files with 23 additions and 4 deletions
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16
src/gui/painting/qfixed_p.h
View File

@ -51,11 +51,19 @@
// We mean it.
//
// clang-format off
#include <QtGui/private/qtguiglobal_p.h>
#include "QtCore/qdebug.h"
#include "QtCore/qpoint.h"
#if defined(Q_OS_WIN)
#include <qt_windows.h> // to suppress min, max macros.
#endif
#include <QtCore/private/qnumeric_p.h>
#include "QtCore/qsize.h"
// clang-format on
QT_BEGIN_NAMESPACE
struct QFixed {
@ -182,6 +190,14 @@ Q_DECL_CONSTEXPR inline bool operator<(int i, const QFixed &f) { return i * 64 <
Q_DECL_CONSTEXPR inline bool operator>(const QFixed &f, int i) { return f.value() > i * 64; }
Q_DECL_CONSTEXPR inline bool operator>(int i, const QFixed &f) { return i * 64 > f.value(); }
inline bool qAddOverflow(QFixed v1, QFixed v2, QFixed *r)
{
int val;
bool result = add_overflow(v1.value(), v2.value(), &val);
r->setValue(val);
return result;
}
#ifndef QT_NO_DEBUG_STREAM
inline QDebug &operator<<(QDebug &dbg, const QFixed &f)
{ return dbg << f.toReal(); }

9
src/gui/text/qtextlayout.cpp
View File

@ -2163,11 +2163,14 @@ found:
eng->maxWidth = qMax(eng->maxWidth, line.textWidth);
} else {
eng->minWidth = qMax(eng->minWidth, lbh.minw);
eng->maxWidth += line.textWidth;
if (qAddOverflow(eng->maxWidth, line.textWidth, &eng->maxWidth))
eng->maxWidth = QFIXED_MAX;
}
if (line.textWidth > 0 && item < eng->layoutData->items.size())
eng->maxWidth += lbh.spaceData.textWidth;
if (line.textWidth > 0 && item < eng->layoutData->items.size()) {
if (qAddOverflow(eng->maxWidth, lbh.spaceData.textWidth, &eng->maxWidth))
eng->maxWidth = QFIXED_MAX;
}
line.textWidth += trailingSpace;
if (lbh.spaceData.length) {

2
src/plugins/platforms/windows/windows.pri
View File

@ -17,7 +17,7 @@ QMAKE_USE_PRIVATE += \
user32 \
winmm
DEFINES *= QT_NO_CAST_FROM_ASCII QT_NO_FOREACH
DEFINES *= QT_NO_CAST_FROM_ASCII QT_NO_FOREACH NOMINMAX
SOURCES += \
$$PWD/qwindowswindow.cpp \