renderthread.cpp Example File

threads/queuedcustomtype/renderthread.cpp
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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(); } 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) { 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; } } 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); } } } void RenderThread::stopProcess() { mutex.lock(); m_abort = true; mutex.unlock(); }