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/***********************************************************************
* fsize.cpp - Height and width of a two-dimensional surface *
* *
* This file is part of the FINAL CUT widget toolkit *
* *
* Copyright 2014-2023 Markus Gans *
* *
* FINAL CUT is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation; either version 3 of *
* the License, or (at your option) any later version. *
* *
* FINAL CUT is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
***********************************************************************/
#include <limits>
#include <utility>
#include "final/util/fpoint.h"
#include "final/util/fsize.h"
namespace finalcut
{
//----------------------------------------------------------------------
// class FSize
//----------------------------------------------------------------------
// public methods of FSize
//----------------------------------------------------------------------
auto FSize::operator += (const FSize& s) -> FSize&
{
constexpr std::size_t max = std::numeric_limits<std::size_t>::max();
width = ( width < max - s.width) ? width + s.width : max;
height = ( height < max - s.height) ? height + s.height : max;
return *this;
}
//----------------------------------------------------------------------
auto FSize::operator -= (const FSize& s) -> FSize&
{
width = ( width >= s.width ) ? width - s.width : 0;
height = ( height >= s.height ) ? height - s.height : 0;
return *this;
}
//----------------------------------------------------------------------
void FSize::scaleBy (int dx, int dy) noexcept
{
if ( dx < 0 )
{
width = ( std::size_t(-dx) < width )
? width - std::size_t(-dx)
: std::size_t(-dx) - width;
}
else
width += std::size_t(dx);
if ( dy < 0 )
{
height = ( std::size_t(-dy) < height )
? height - std::size_t(-dy)
: std::size_t(-dy) - height;
}
else
height += std::size_t(dy);
}
//----------------------------------------------------------------------
void FSize::scaleBy (const FPoint& d) noexcept
{
scaleBy (d.getX(), d.getY());
}
// FSize non-member operators
//----------------------------------------------------------------------
auto operator << (std::ostream& outstr, const FSize& s) -> std::ostream&
{
outstr << s.width << " " << s.height;
return outstr;
}
//----------------------------------------------------------------------
auto operator >> (std::istream& instr, FSize& s) -> std::istream&
{
std::size_t w;
std::size_t h;
instr >> w;
instr >> h;
s.setSize (w, h);
return instr;
}
} // namespace finalcut
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