diff options
Diffstat (limited to 'static/source/qt5-mandelbrot/renderthread.cxx')
| -rw-r--r-- | static/source/qt5-mandelbrot/renderthread.cxx | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/static/source/qt5-mandelbrot/renderthread.cxx b/static/source/qt5-mandelbrot/renderthread.cxx deleted file mode 100644 index 398e43ded15d..000000000000 --- a/static/source/qt5-mandelbrot/renderthread.cxx +++ /dev/null @@ -1,232 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** BSD License Usage -** Alternatively, you may use this file under the terms of the BSD license -** as follows: -** -** "Redistribution and use in source and binary forms, with or without -** modification, are permitted provided that the following conditions are -** met: -** * Redistributions of source code must retain the above copyright -** notice, this list of conditions and the following disclaimer. -** * Redistributions in binary form must reproduce the above copyright -** notice, this list of conditions and the following disclaimer in -** the documentation and/or other materials provided with the -** distribution. -** * Neither the name of The Qt Company Ltd nor the names of its -** contributors may be used to endorse or promote products derived -** from this software without specific prior written permission. -** -** -** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "renderthread.h" -#include "renderthread.moc" - -#include <QtGui/QImage> -#include <cmath> - -RenderThread::RenderThread(QObject* parent) - : QThread(parent) -{ - for (int i = 0; i < ColormapSize; ++i) - m_colormap[i] = rgbFromWaveLength(380.0 + (i * 400.0 / ColormapSize)); -} - -RenderThread::~RenderThread() -{ - m_mutex.lock(); - m_abort = true; - m_condition.wakeOne(); - m_mutex.unlock(); - - wait(); -} - -void RenderThread::render(double centerX, double centerY, double scaleFactor, QSize resultSize, - double devicePixelRatio) -{ - QMutexLocker locker(&m_mutex); - - m_centerX = centerX; - m_centerY = centerY; - m_scaleFactor = scaleFactor; - m_devicePixelRatio = devicePixelRatio; - m_resultSize = resultSize; - - if (!isRunning()) - { - start(LowPriority); - } - else - { - m_restart = true; - m_condition.wakeOne(); - } -} - -void RenderThread::run() -{ - forever - { - m_mutex.lock(); - const double devicePixelRatio = m_devicePixelRatio; - const QSize resultSize = m_resultSize * devicePixelRatio; - const double requestedScaleFactor = m_scaleFactor; - const double scaleFactor = requestedScaleFactor / devicePixelRatio; - const double centerX = m_centerX; - const double centerY = m_centerY; - m_mutex.unlock(); - - int halfWidth = resultSize.width() / 2; - int halfHeight = resultSize.height() / 2; - QImage image(resultSize, QImage::Format_RGB32); - image.setDevicePixelRatio(devicePixelRatio); - - const int NumPasses = 8; - int pass = 0; - while (pass < NumPasses) - { - const int MaxIterations = (1 << (2 * pass + 6)) + 32; - const int Limit = 4; - bool allBlack = true; - - for (int y = -halfHeight; y < halfHeight; ++y) - { - if (m_restart) - break; - if (m_abort) - return; - - auto scanLine = reinterpret_cast<uint*>(image.scanLine(y + halfHeight)); - const double ay = centerY + (y * scaleFactor); - - for (int x = -halfWidth; x < halfWidth; ++x) - { - const double ax = centerX + (x * scaleFactor); - double a1 = ax; - double b1 = ay; - int numIterations = 0; - - do - { - ++numIterations; - const double a2 = (a1 * a1) - (b1 * b1) + ax; - const double b2 = (2 * a1 * b1) + ay; - if ((a2 * a2) + (b2 * b2) > Limit) - break; - - ++numIterations; - a1 = (a2 * a2) - (b2 * b2) + ax; - b1 = (2 * a2 * b2) + ay; - if ((a1 * a1) + (b1 * b1) > Limit) - break; - } while (numIterations < MaxIterations); - - if (numIterations < MaxIterations) - { - *scanLine++ = m_colormap[numIterations % ColormapSize]; - allBlack = false; - } - else - { - *scanLine++ = qRgb(0, 0, 0); - } - } - } - - if (allBlack && pass == 0) - { - pass = 4; - } - else - { - if (!m_restart) - emit renderedImage(image, requestedScaleFactor); - ++pass; - } - } - - m_mutex.lock(); - if (!m_restart) - m_condition.wait(&m_mutex); - m_restart = false; - m_mutex.unlock(); - } -} - -uint RenderThread::rgbFromWaveLength(double wave) -{ - double r = 0; - double g = 0; - double b = 0; - - if (wave >= 380.0 && wave <= 440.0) - { - r = -1.0 * (wave - 440.0) / (440.0 - 380.0); - b = 1.0; - } - else if (wave >= 440.0 && wave <= 490.0) - { - g = (wave - 440.0) / (490.0 - 440.0); - b = 1.0; - } - else if (wave >= 490.0 && wave <= 510.0) - { - g = 1.0; - b = -1.0 * (wave - 510.0) / (510.0 - 490.0); - } - else if (wave >= 510.0 && wave <= 580.0) - { - r = (wave - 510.0) / (580.0 - 510.0); - g = 1.0; - } - else if (wave >= 580.0 && wave <= 645.0) - { - r = 1.0; - g = -1.0 * (wave - 645.0) / (645.0 - 580.0); - } - else if (wave >= 645.0 && wave <= 780.0) - { - r = 1.0; - } - - double s = 1.0; - if (wave > 700.0) - s = 0.3 + 0.7 * (780.0 - wave) / (780.0 - 700.0); - else if (wave < 420.0) - s = 0.3 + 0.7 * (wave - 380.0) / (420.0 - 380.0); - - r = std::pow(r * s, 0.8); - g = std::pow(g * s, 0.8); - b = std::pow(b * s, 0.8); - return qRgb(int(r * 255), int(g * 255), int(b * 255)); -} |