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libcamera: geometry: Add Size members to grown or shrink by a margin

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Add four new member functions to the Size class (two in-place and two
const) to grow and shrink a Size by given margins.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
This commit is contained in:
Laurent Pinchart 2021-10-13 04:11:18 +03:00
parent ccec150589
commit e229b35edf
3 changed files with 115 additions and 5 deletions
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42
src/libcamera/geometry.cpp
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@ -173,6 +173,28 @@ const std::string Size::toString() const
* \return A reference to this object
*/
/**
* \fn Size::growBy(const Size &margins)
* \brief Grow the size by \a margins in place
* \param[in] margins The margins to add to the size
*
* This function adds the width and height of the \a margin size to this size.
*
* \return A reference to this object
*/
/**
* \fn Size::shrinkBy(const Size &margins)
* \brief Shrink the size by \a margins in place
* \param[in] margins The margins to subtract to the size
*
* This function subtracts the width and height of the \a margin size from this
* size. If the width or height of the size are smaller than those of \a
* margins, the result is clamped to 0.
*
* \return A reference to this object
*/
/**
* \fn Size::alignedDownTo(unsigned int hAlignment, unsigned int vAlignment)
* \brief Align the size down horizontally and vertically
@ -209,6 +231,26 @@ const std::string Size::toString() const
* height of this size and the \a expand size
*/
/**
* \fn Size::grownBy(const Size &margins)
* \brief Grow the size by \a margins
* \param[in] margins The margins to add to the size
* \return A Size whose width and height are the sum of the width and height of
* this size and the \a margins size
*/
/**
* \fn Size::shrunkBy(const Size &margins)
* \brief Shrink the size by \a margins
* \param[in] margins The margins to subtract to the size
*
* If the width or height of the size are smaller than those of \a margins, the
* resulting size has its width or height clamped to 0.
*
* \return A Size whose width and height are the difference of the width and
* height of this size and the \a margins size, clamped to 0
*/
/**
* \brief Bound the size down to match the aspect ratio given by \a ratio
* \param[in] ratio The size whose aspect ratio must be matched