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0031048: Visualization - runtime error reported by Clang undefined behavior sanitizer in Image_AlienPixMap::Save()

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Image_PixMapData - use unsigned math (uintptr_t) instead of signed math with pointers for defining negative stride.
This commit is contained in:
kgv 2019-10-11 14:56:03 +03:00 committed by abv
parent c275673dbf
commit 8ba3d978db
1 changed files with 4 additions and 4 deletions
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8
src/Image/Image_PixMapData.hxx
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@ -74,27 +74,27 @@ public:
//! @return data pointer to requested row (first column). //! @return data pointer to requested row (first column).
inline const Standard_Byte* Row (const Standard_Size theRow) const inline const Standard_Byte* Row (const Standard_Size theRow) const
{ {
return myTopRowPtr + SizeRowBytes * theRow * TopToDown; return myTopRowPtr + ptrdiff_t(SizeRowBytes * theRow * TopToDown);
} }
//! @return data pointer to requested row (first column). //! @return data pointer to requested row (first column).
inline Standard_Byte* ChangeRow (const Standard_Size theRow) inline Standard_Byte* ChangeRow (const Standard_Size theRow)
{ {
return myTopRowPtr + SizeRowBytes * theRow * TopToDown; return myTopRowPtr + ptrdiff_t(SizeRowBytes * theRow * TopToDown);
} }
//! @return data pointer to requested position. //! @return data pointer to requested position.
inline const Standard_Byte* Value (const Standard_Size theRow, inline const Standard_Byte* Value (const Standard_Size theRow,
const Standard_Size theCol) const const Standard_Size theCol) const
{ {
return myTopRowPtr + SizeRowBytes * theRow * TopToDown + SizeBPP * theCol; return myTopRowPtr + ptrdiff_t(SizeRowBytes * theRow * TopToDown) + SizeBPP * theCol;
} }
//! @return data pointer to requested position. //! @return data pointer to requested position.
inline Standard_Byte* ChangeValue (const Standard_Size theRow, inline Standard_Byte* ChangeValue (const Standard_Size theRow,
const Standard_Size theCol) const Standard_Size theCol)
{ {
return myTopRowPtr + SizeRowBytes * theRow * TopToDown + SizeBPP * theCol; return myTopRowPtr + ptrdiff_t(SizeRowBytes * theRow * TopToDown) + SizeBPP * theCol;
} }
//! Compute the maximal row alignment for current row size. //! Compute the maximal row alignment for current row size.