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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
// Copyright (C) 2008 Benoit Jacob <>
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at
#include <Eigen/Core>
#include <QtGui/QApplication>
#include <QtGui/QWidget>
#include <QtCore/QThread>
class MandelbrotWidget;
class MandelbrotThread : public QThread
friend class MandelbrotWidget;
MandelbrotWidget *widget;
long long total_iter;
int id, max_iter;
bool single_precision;
MandelbrotThread(MandelbrotWidget *w, int i) : widget(w), id(i) {}
void run();
template<typename Real> void render(int img_width, int img_height);
class MandelbrotWidget : public QWidget
friend class MandelbrotThread;
Eigen::Vector2d center;
double xradius;
int size;
unsigned char *buffer;
QPoint lastpos;
int draft;
MandelbrotThread **threads;
int threadcount;
void resizeEvent(QResizeEvent *);
void paintEvent(QPaintEvent *);
void mousePressEvent(QMouseEvent *event);
void mouseMoveEvent(QMouseEvent *event);
MandelbrotWidget() : QWidget(), center(0,0), xradius(2),
size(0), buffer(0), draft(16)
threadcount = QThread::idealThreadCount();
threads = new MandelbrotThread*[threadcount];
for(int th = 0; th < threadcount; th++) threads[th] = new MandelbrotThread(this, th);
if(buffer) delete[]buffer;
for(int th = 0; th < threadcount; th++) delete threads[th];
delete[] threads;
#endif // MANDELBROT_H