diff options
Diffstat (limited to 'static/source/qt5-mandelbrot')
| -rw-r--r-- | static/source/qt5-mandelbrot/main.cxx | 66 | ||||
| -rw-r--r-- | static/source/qt5-mandelbrot/mandelbrotwidget.cxx | 228 | ||||
| -rw-r--r-- | static/source/qt5-mandelbrot/mandelbrotwidget.h | 91 | ||||
| -rw-r--r-- | static/source/qt5-mandelbrot/renderthread.cxx | 232 | ||||
| -rw-r--r-- | static/source/qt5-mandelbrot/renderthread.h | 97 |
5 files changed, 714 insertions, 0 deletions
diff --git a/static/source/qt5-mandelbrot/main.cxx b/static/source/qt5-mandelbrot/main.cxx new file mode 100644 index 0000000000..037c63153c --- /dev/null +++ b/static/source/qt5-mandelbrot/main.cxx @@ -0,0 +1,66 @@ +/**************************************************************************** +** +** 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 "mandelbrotwidget.h" + +#include <QtWidgets/QApplication> +#include <QtCore/QtPlugin> + +Q_IMPORT_PLUGIN(QWasmIntegrationPlugin) + +int main(int argc, char* argv[]) +{ + QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling); + QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); + QApplication app(argc, argv); + MandelbrotWidget widget; + widget.show(); + return app.exec(); +} diff --git a/static/source/qt5-mandelbrot/mandelbrotwidget.cxx b/static/source/qt5-mandelbrot/mandelbrotwidget.cxx new file mode 100644 index 0000000000..5886dd2664 --- /dev/null +++ b/static/source/qt5-mandelbrot/mandelbrotwidget.cxx @@ -0,0 +1,228 @@ +/**************************************************************************** +** +** 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 "mandelbrotwidget.h" +#include "mandelbrotwidget.moc" + +#include <QtGui/QPainter> +#include <QtGui/QKeyEvent> + +#include <math.h> + +const double DefaultCenterX = -0.637011; +const double DefaultCenterY = -0.0395159; +const double DefaultScale = 0.00403897; + +const double ZoomInFactor = 0.8; +const double ZoomOutFactor = 1 / ZoomInFactor; +const int ScrollStep = 20; + +MandelbrotWidget::MandelbrotWidget(QWidget* parent) + : QWidget(parent) + , centerX(DefaultCenterX) + , centerY(DefaultCenterY) + , pixmapScale(DefaultScale) + , curScale(DefaultScale) +{ + connect(&thread, &RenderThread::renderedImage, this, &MandelbrotWidget::updatePixmap); + + setWindowTitle(tr("Mandelbrot")); +#if QT_CONFIG(cursor) + setCursor(Qt::CrossCursor); +#endif + resize(550, 400); +} + +void MandelbrotWidget::paintEvent(QPaintEvent* /* event */) +{ + QPainter painter(this); + painter.fillRect(rect(), Qt::black); + + if (pixmap.isNull()) + { + painter.setPen(Qt::white); + painter.drawText(rect(), Qt::AlignCenter, tr("Rendering initial image, please wait...")); + return; + } + + if (qFuzzyCompare(curScale, pixmapScale)) + { + painter.drawPixmap(pixmapOffset, pixmap); + } + else + { + auto previewPixmap = qFuzzyCompare(pixmap.devicePixelRatioF(), qreal(1)) + ? pixmap + : pixmap.scaled(pixmap.size() / pixmap.devicePixelRatioF(), + Qt::KeepAspectRatio, Qt::SmoothTransformation); + double scaleFactor = pixmapScale / curScale; + int newWidth = int(previewPixmap.width() * scaleFactor); + int newHeight = int(previewPixmap.height() * scaleFactor); + int newX = pixmapOffset.x() + (previewPixmap.width() - newWidth) / 2; + int newY = pixmapOffset.y() + (previewPixmap.height() - newHeight) / 2; + + painter.save(); + painter.translate(newX, newY); + painter.scale(scaleFactor, scaleFactor); + + QRectF exposed = painter.transform().inverted().mapRect(rect()).adjusted(-1, -1, 1, 1); + painter.drawPixmap(exposed, previewPixmap, exposed); + painter.restore(); + } + + QString text = tr("Use mouse wheel or the '+' and '-' keys to zoom. " + "Press and hold left mouse button to scroll."); + QFontMetrics metrics = painter.fontMetrics(); + int textWidth = metrics.horizontalAdvance(text); + + painter.setPen(Qt::NoPen); + painter.setBrush(QColor(0, 0, 0, 127)); + painter.drawRect((width() - textWidth) / 2 - 5, 0, textWidth + 10, metrics.lineSpacing() + 5); + painter.setPen(Qt::white); + painter.drawText((width() - textWidth) / 2, metrics.leading() + metrics.ascent(), text); +} + +void MandelbrotWidget::resizeEvent(QResizeEvent* /* event */) +{ + thread.render(centerX, centerY, curScale, size(), devicePixelRatioF()); +} + +void MandelbrotWidget::keyPressEvent(QKeyEvent* event) +{ + switch (event->key()) + { + case Qt::Key_Plus: + zoom(ZoomInFactor); + break; + case Qt::Key_Minus: + zoom(ZoomOutFactor); + break; + case Qt::Key_Left: + scroll(-ScrollStep, 0); + break; + case Qt::Key_Right: + scroll(+ScrollStep, 0); + break; + case Qt::Key_Down: + scroll(0, -ScrollStep); + break; + case Qt::Key_Up: + scroll(0, +ScrollStep); + break; + default: + QWidget::keyPressEvent(event); + } +} + +#if QT_CONFIG(wheelevent) +void MandelbrotWidget::wheelEvent(QWheelEvent* event) +{ + const int numDegrees = event->angleDelta().y() / 8; + const double numSteps = numDegrees / double(15); + zoom(pow(ZoomInFactor, numSteps)); +} +#endif + +void MandelbrotWidget::mousePressEvent(QMouseEvent* event) +{ + if (event->button() == Qt::LeftButton) + lastDragPos = event->pos(); +} + +void MandelbrotWidget::mouseMoveEvent(QMouseEvent* event) +{ + if (event->buttons() & Qt::LeftButton) + { + pixmapOffset += event->pos() - lastDragPos; + lastDragPos = event->pos(); + update(); + } +} + +void MandelbrotWidget::mouseReleaseEvent(QMouseEvent* event) +{ + if (event->button() == Qt::LeftButton) + { + pixmapOffset += event->pos() - lastDragPos; + lastDragPos = QPoint(); + + const auto pixmapSize = pixmap.size() / pixmap.devicePixelRatioF(); + int deltaX = (width() - pixmapSize.width()) / 2 - pixmapOffset.x(); + int deltaY = (height() - pixmapSize.height()) / 2 - pixmapOffset.y(); + scroll(deltaX, deltaY); + } +} + +void MandelbrotWidget::updatePixmap(const QImage& image, double scaleFactor) +{ + if (!lastDragPos.isNull()) + return; + + pixmap = QPixmap::fromImage(image); + pixmapOffset = QPoint(); + lastDragPos = QPoint(); + pixmapScale = scaleFactor; + update(); +} + +void MandelbrotWidget::zoom(double zoomFactor) +{ + curScale *= zoomFactor; + update(); + thread.render(centerX, centerY, curScale, size(), devicePixelRatioF()); +} + +void MandelbrotWidget::scroll(int deltaX, int deltaY) +{ + centerX += deltaX * curScale; + centerY += deltaY * curScale; + update(); + thread.render(centerX, centerY, curScale, size(), devicePixelRatioF()); +} diff --git a/static/source/qt5-mandelbrot/mandelbrotwidget.h b/static/source/qt5-mandelbrot/mandelbrotwidget.h new file mode 100644 index 0000000000..72e95568b5 --- /dev/null +++ b/static/source/qt5-mandelbrot/mandelbrotwidget.h @@ -0,0 +1,91 @@ +/**************************************************************************** +** +** 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." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#pragma once + +#include <QtGui/QPixmap> +#include <QtWidgets/QWidget> + +#include "renderthread.h" + +class MandelbrotWidget : public QWidget +{ + Q_OBJECT + +public: + MandelbrotWidget(QWidget* parent = nullptr); + +protected: + void paintEvent(QPaintEvent* event) override; + void resizeEvent(QResizeEvent* event) override; + void keyPressEvent(QKeyEvent* event) override; +#if QT_CONFIG(wheelevent) + void wheelEvent(QWheelEvent* event) override; +#endif + void mousePressEvent(QMouseEvent* event) override; + void mouseMoveEvent(QMouseEvent* event) override; + void mouseReleaseEvent(QMouseEvent* event) override; + +private slots: + void updatePixmap(const QImage& image, double scaleFactor); + void zoom(double zoomFactor); + +private: + void scroll(int deltaX, int deltaY); + + RenderThread thread; + QPixmap pixmap; + QPoint pixmapOffset; + QPoint lastDragPos; + double centerX; + double centerY; + double pixmapScale; + double curScale; +}; diff --git a/static/source/qt5-mandelbrot/renderthread.cxx b/static/source/qt5-mandelbrot/renderthread.cxx new file mode 100644 index 0000000000..398e43ded1 --- /dev/null +++ b/static/source/qt5-mandelbrot/renderthread.cxx @@ -0,0 +1,232 @@ +/**************************************************************************** +** +** 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)); +} diff --git a/static/source/qt5-mandelbrot/renderthread.h b/static/source/qt5-mandelbrot/renderthread.h new file mode 100644 index 0000000000..16c0d86fd4 --- /dev/null +++ b/static/source/qt5-mandelbrot/renderthread.h @@ -0,0 +1,97 @@ +/**************************************************************************** +** +** 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." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#pragma once + +#include <QtCore/QMutex> +#include <QtCore/QSize> +#include <QtCore/QThread> +#include <QtCore/QWaitCondition> + +QT_BEGIN_NAMESPACE +class QImage; +QT_END_NAMESPACE + +class RenderThread : public QThread +{ + Q_OBJECT + +public: + RenderThread(QObject* parent = nullptr); + ~RenderThread(); + + void render(double centerX, double centerY, double scaleFactor, QSize resultSize, + double devicePixelRatio); + +signals: + void renderedImage(const QImage& image, double scaleFactor); + +protected: + void run() override; + +private: + static uint rgbFromWaveLength(double wave); + + QMutex m_mutex; + QWaitCondition m_condition; + double m_centerX; + double m_centerY; + double m_scaleFactor; + double m_devicePixelRatio; + QSize m_resultSize; + bool m_restart = false; + bool m_abort = false; + + enum + { + ColormapSize = 512 + }; + uint m_colormap[ColormapSize]; +}; |