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| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the examples of the Qt Toolkit. |
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| |
| #include "renderthread.h" |
| |
| #include <QRandomGenerator> |
| |
| RenderThread::RenderThread(QObject *parent) |
| : QThread(parent) |
| { |
| m_abort = false; |
| } |
| |
| RenderThread::~RenderThread() |
| { |
| mutex.lock(); |
| m_abort = true; |
| mutex.unlock(); |
| |
| wait(); |
| } |
| |
| //![processing the image (start)] |
| void RenderThread::processImage(const QImage &image) |
| { |
| if (image.isNull()) |
| return; |
| |
| m_image = image; |
| m_abort = false; |
| start(); |
| } |
| |
| void RenderThread::run() |
| { |
| 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)] |
| int x1 = qMax(0, QRandomGenerator::global()->bounded(m_image.width()) - s/2); |
| int x2 = qMin(x1 + s/2 + 1, m_image.width()); |
| int y1 = qMax(0, QRandomGenerator::global()->bounded(m_image.height()) - s/2); |
| 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) { |
| QRgb pixel = m_image.pixel(j, i); |
| red += qRed(pixel); |
| green += qGreen(pixel); |
| blue += qBlue(pixel); |
| n += 1; |
| } |
| } |
| //![processing the image (finish)] |
| Block block(QRect(x1, y1, x2 - x1 + 1, y2 - y1 + 1), |
| QColor(red/n, green/n, blue/n)); |
| emit sendBlock(block); |
| if (m_abort) |
| return; |
| msleep(10); |
| } |
| } |
| } |
| //![processing the image (finish)] |
| |
| void RenderThread::stopProcess() |
| { |
| mutex.lock(); |
| m_abort = true; |
| mutex.unlock(); |
| } |