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Avoid int overflow in QImage rotate90/180/270

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Fixes: QTBUG-91223
Change-Id: Ice53c80d695a5ffdf9162df84e7c9b1e43106bae
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
(cherry picked from commit 8daa94431341afece6beb052e6224d215f8507b7)
This commit is contained in:
Eirik Aavitsland 2021-02-24 10:33:31 +01:00
parent 78224fdaa7
commit 20e5aba3b9
1 changed files with 16 additions and 11 deletions
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27
src/gui/painting/qmemrotate.cpp
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@ -45,10 +45,10 @@ static const int tileSize = 32;
template <class T>
Q_STATIC_TEMPLATE_FUNCTION
inline void qt_memrotate90_tiled(const T *src, int w, int h, int sstride, T *dest, int dstride)
inline void qt_memrotate90_tiled(const T *src, int w, int h, int isstride, T *dest, int idstride)
{
sstride /= sizeof(T);
dstride /= sizeof(T);
const qsizetype sstride = isstride / sizeof(T);
const qsizetype dstride = idstride / sizeof(T);
const int pack = sizeof(quint32) / sizeof(T);
const int unaligned =
@ -104,9 +104,10 @@ inline void qt_memrotate90_tiled(const T *src, int w, int h, int sstride, T *des
template <class T>
Q_STATIC_TEMPLATE_FUNCTION
inline void qt_memrotate90_tiled_unpacked(const T *src, int w, int h, int sstride, T *dest,
int dstride)
inline void qt_memrotate90_tiled_unpacked(const T *src, int w, int h, int isstride, T *dest, int idstride)
{
const qsizetype sstride = isstride;
const qsizetype dstride = idstride;
const int numTilesX = (w + tileSize - 1) / tileSize;
const int numTilesY = (h + tileSize - 1) / tileSize;
@ -132,10 +133,10 @@ inline void qt_memrotate90_tiled_unpacked(const T *src, int w, int h, int sstrid
template <class T>
Q_STATIC_TEMPLATE_FUNCTION
inline void qt_memrotate270_tiled(const T *src, int w, int h, int sstride, T *dest, int dstride)
inline void qt_memrotate270_tiled(const T *src, int w, int h, int isstride, T *dest, int idstride)
{
sstride /= sizeof(T);
dstride /= sizeof(T);
const qsizetype sstride = isstride / sizeof(T);
const qsizetype dstride = idstride / sizeof(T);
const int pack = sizeof(quint32) / sizeof(T);
const int unaligned =
@ -191,9 +192,10 @@ inline void qt_memrotate270_tiled(const T *src, int w, int h, int sstride, T *de
template <class T>
Q_STATIC_TEMPLATE_FUNCTION
inline void qt_memrotate270_tiled_unpacked(const T *src, int w, int h, int sstride, T *dest,
int dstride)
inline void qt_memrotate270_tiled_unpacked(const T *src, int w, int h, int isstride, T *dest, int idstride)
{
const qsizetype sstride = isstride;
const qsizetype dstride = idstride;
const int numTilesX = (w + tileSize - 1) / tileSize;
const int numTilesY = (h + tileSize - 1) / tileSize;
@ -247,8 +249,11 @@ inline void qt_memrotate90_template<quint64>(const quint64 *src, int w, int h, i
template <class T>
Q_STATIC_TEMPLATE_FUNCTION
inline void qt_memrotate180_template(const T *src, int w, int h, int sstride, T *dest, int dstride)
inline void qt_memrotate180_template(const T *src, int w, int h, int isstride, T *dest, int idstride)
{
const qsizetype sstride = isstride;
const qsizetype dstride = idstride;
const char *s = (const char*)(src) + (h - 1) * sstride;
for (int dy = 0; dy < h; ++dy) {
T *d = reinterpret_cast<T*>((char *)(dest) + dy * dstride);