pixel.h
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/* Webcamoid, webcam capture application.
* Copyright (C) 2016 Gonzalo Exequiel Pedone
*
* Webcamoid 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, either version 3 of the License, or
* (at your option) any later version.
*
* Webcamoid 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.
*
* You should have received a copy of the GNU General Public License
* along with Webcamoid. If not, see <http://www.gnu.org/licenses/>.
*
* Web-Site: http://webcamoid.github.io/
*/
#ifndef INTEGRAL_H
#define INTEGRAL_H
#include <qrgb.h>
template<typename T> class Pixel
{
public:
Pixel():
r(0), g(0), b(0), a(0)
{
}
Pixel(T r, T g, T b, T a):
r(r), g(g), b(b), a(a)
{
}
Pixel operator +(const Pixel &other) const
{
return Pixel(this->r + other.r,
this->g + other.g,
this->b + other.b,
this->a + other.a);
}
Pixel operator -(const Pixel &other) const
{
return Pixel(this->r - other.r,
this->g - other.g,
this->b - other.b,
this->a - other.a);
}
template <typename R> Pixel<R> operator /(R c) const
{
return Pixel<R>(this->r / c,
this->g / c,
this->b / c,
this->a / c);
}
Pixel &operator +=(const Pixel &other)
{
this->r += other.r;
this->g += other.g;
this->b += other.b;
this->a += other.a;
return *this;
}
Pixel &operator +=(QRgb pixel)
{
this->r += qRed(pixel);
this->g += qGreen(pixel);
this->b += qBlue(pixel);
this->a += qAlpha(pixel);
return *this;
}
T r;
T g;
T b;
T a;
};
template<typename T> inline Pixel<T> integralSum(const Pixel<T> *integral,
int lineWidth,
int x, int y, int kw, int kh)
{
const Pixel<T> *p0 = integral + x + y * lineWidth;
const Pixel<T> *p1 = p0 + kw;
const Pixel<T> *p2 = p0 + kh * lineWidth;
const Pixel<T> *p3 = p2 + kw;
return *p0 + *p3 - *p1 - *p2;
}
using PixelU32 = Pixel<quint32>;
using PixelReal = Pixel<qreal>;
#endif // INTEGRAL_H