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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "block.h"
#include "renderthread.h"
#include <QRandomGenerator>
#include <QRgb>
RenderThread::RenderThread(QObject *parent)
: QThread(parent)
{
}
RenderThread::~RenderThread()
{
wait();
}
//![processing the image (start)]
void RenderThread::processImage(const QImage &image)
{
if (image.isNull())
return;
m_image = image;
start();
}
void RenderThread::run()
{
const int size = qMax(m_image.width()/20, m_image.height()/20);
for (int s = size; s > 0; --s) {
for (int c = 0; c < 400; ++c) {
//![processing the image (start)]
const int x1 = qMax(0, QRandomGenerator::global()->bounded(m_image.width()) - s/2);
const int x2 = qMin(x1 + s/2 + 1, m_image.width());
const int y1 = qMax(0, QRandomGenerator::global()->bounded(m_image.height()) - s/2);
const int y2 = qMin(y1 + s/2 + 1, m_image.height());
int n = 0;
int red = 0;
int green = 0;
int blue = 0;
for (int i = y1; i < y2; ++i) {
for (int j = x1; j < x2; ++j) {
const QRgb pixel = m_image.pixel(j, i);
red += qRed(pixel);
green += qGreen(pixel);
blue += qBlue(pixel);
n += 1;
}
}
//![processing the image (finish)]
const Block block(QRect(x1, y1, x2 - x1 + 1, y2 - y1 + 1),
QColor(red/n, green/n, blue/n));
emit sendBlock(block);
if (isInterruptionRequested())
return;
msleep(10);
}
}
}
//![processing the image (finish)]
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