blitrect.cpp

/*
 
Pencil2D - Traditional Animation Software
Copyright (C) 2005-2007 Patrick Corrieri & Pascal Naidon
Copyright (C) 2012-2020 Matthew Chiawen Chang
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2 of the License.
 
This program 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 General Public License for more details.
 
*/
 
#include "blitrect.h"
 
BlitRect::BlitRect()
{
}
 
BlitRect::BlitRect(const QRect rect)
{
    setTopLeft(rect.topLeft());
    setBottomRight(rect.bottomRight());
    mInitialized = true;
}
 
BlitRect::BlitRect(const QPoint p)
{
    extend(p);
}
 
void BlitRect::extend(const QPoint p)
{
    if (mInitialized == false)
    {
        setBottomLeft(p);
        setTopRight(p);
        mInitialized = true;
    }
    else
    {
        if (left() > p.x()) { setLeft(p.x()); }
        if (right() < p.x()) { setRight(p.x()); }
        if (top() > p.y()) { setTop(p.y()); }
        if (bottom() < p.y()) { setBottom(p.y()); }
    }
}
 
void BlitRect::extend(const QRect& rect)
{
    // For historical reasons the values returned by the bottom() and
    // right() functions deviate from the true bottom-right corner of the rectangle:
    // The right() function returns left() + width() - 1 and the bottom()
    // function returns top() + height() - 1
    // In order to counter that, we subtract 1 from width and height
    extend(rect.topLeft(), QSize(rect.width() - 1, rect.height() - 1));
}
 
void BlitRect::extend(const QPoint& p, const QSize& size)
{
    if (mInitialized == false)
    {
        setTopLeft(p);
        setBottomRight(p + QPoint(size.width(), size.height()));
        mInitialized = true;
    }
    else
    {
        if (left() > p.x()) { setLeft(p.x()); }
        if (top() > p.y()) { setTop(p.y()); }
        if (right() - size.width() < p.x()) { setRight(p.x() + size.width()); }
        if (bottom() - size.height() < p.y()) { setBottom(p.y() + size.height()); }
    }
}