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/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Design Tooling
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#include <QPointF>
#include <QRectF>
#include <QTransform>
namespace DesignTools {
double clamp(double val, double lo, double hi)
{
return val < lo ? lo : (val > hi ? hi : val);
}
double lerp(double blend, double a, double b)
{
return (1.0 - blend) * a + blend * b;
}
double scaleX(const QTransform &transform)
{
return transform.m11();
}
double scaleY(const QTransform &transform)
{
return transform.m22();
}
void grow(QRectF &rect, const QPointF &point)
{
if (rect.left() > point.x())
rect.setLeft(point.x());
if (rect.right() < point.x())
rect.setRight(point.x());
if (rect.top() > point.y())
rect.setTop(point.y());
if (rect.bottom() < point.y())
rect.setBottom(point.y());
}
QRectF bbox(const QRectF &rect, const QTransform &transform)
{
QRectF out = rect;
grow(out, transform.map(rect.topLeft()));
grow(out, transform.map(rect.topRight()));
grow(out, transform.map(rect.bottomLeft()));
grow(out, transform.map(rect.bottomRight()));
return out;
}
} // End namespace DesignTools.
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