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50 | |
51 | #include "renderthread.h" |
52 | |
53 | #include <QRandomGenerator> |
54 | |
55 | RenderThread::RenderThread(QObject *parent) |
56 | : QThread(parent) |
57 | { |
58 | m_abort = false; |
59 | } |
60 | |
61 | RenderThread::~RenderThread() |
62 | { |
63 | mutex.lock(); |
64 | m_abort = true; |
65 | mutex.unlock(); |
66 | |
67 | wait(); |
68 | } |
69 | |
70 | //![processing the image (start)] |
71 | void RenderThread::processImage(const QImage &image) |
72 | { |
73 | if (image.isNull()) |
74 | return; |
75 | |
76 | m_image = image; |
77 | m_abort = false; |
78 | start(); |
79 | } |
80 | |
81 | void RenderThread::run() |
82 | { |
83 | int size = qMax(a: m_image.width()/20, b: m_image.height()/20); |
84 | for (int s = size; s > 0; --s) { |
85 | for (int c = 0; c < 400; ++c) { |
86 | //![processing the image (start)] |
87 | int x1 = qMax(a: 0, b: QRandomGenerator::global()->bounded(highest: m_image.width()) - s/2); |
88 | int x2 = qMin(a: x1 + s/2 + 1, b: m_image.width()); |
89 | int y1 = qMax(a: 0, b: QRandomGenerator::global()->bounded(highest: m_image.height()) - s/2); |
90 | int y2 = qMin(a: y1 + s/2 + 1, b: m_image.height()); |
91 | int n = 0; |
92 | int red = 0; |
93 | int green = 0; |
94 | int blue = 0; |
95 | for (int i = y1; i < y2; ++i) { |
96 | for (int j = x1; j < x2; ++j) { |
97 | QRgb pixel = m_image.pixel(x: j, y: i); |
98 | red += qRed(rgb: pixel); |
99 | green += qGreen(rgb: pixel); |
100 | blue += qBlue(rgb: pixel); |
101 | n += 1; |
102 | } |
103 | } |
104 | //![processing the image (finish)] |
105 | Block block(QRect(x1, y1, x2 - x1 + 1, y2 - y1 + 1), |
106 | QColor(red/n, green/n, blue/n)); |
107 | emit sendBlock(block); |
108 | if (m_abort) |
109 | return; |
110 | msleep(10); |
111 | } |
112 | } |
113 | } |
114 | //![processing the image (finish)] |
115 | |
116 | void RenderThread::stopProcess() |
117 | { |
118 | mutex.lock(); |
119 | m_abort = true; |
120 | mutex.unlock(); |
121 | } |
122 | |