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Remove wasm-qt-mandelbrot demo

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...that had been added with f90c68316c "WASM: add
Emscripten demo application".  Whatever the original intention, it has probably
served its purpose by now---and now only negatively impacts (re-)build times.

Change-Id: I2bda8d12b91e741c4d0f7d3f02597e0e9505a73a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/172087
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <stephan.bergmann@allotropia.de>
This commit is contained in:
Stephan Bergmann
2024-08-20 07:58:01 +02:00
parent 4a32b04fd1
commit af6a5ba20f
10 changed files with 0 additions and 786 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Repository.mk
-1
View File
@@ -85,7 +85,6 @@ $(eval $(call gb_Helper_register_executables,NONE, \
listglyphs \
$(if $(and $(ENABLE_GTK3), $(filter LINUX %BSD SOLARIS,$(OS))), gtktiledviewer) \
$(if $(and $(ENABLE_GTKTILEDVIEWER), $(filter WNT,$(OS))), gtktiledviewer) \
$(if $(filter EMSCRIPTEN,$(OS)),wasm-qt5-mandelbrot) \
))
$(eval $(call gb_Helper_register_executables_for_install,SDK,sdk, \
static/CustomTarget_wasm-qt5-mandelbrot_moc.mk
-37
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@@ -1,37 +0,0 @@
# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
#
# This file is part of the LibreOffice project.
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
$(eval $(call gb_CustomTarget_CustomTarget,static/qt5-mandelbrot))
$(call gb_CustomTarget_get_target,static/qt5-mandelbrot) : \
$(gb_CustomTarget_workdir)/static/qt5-mandelbrot/renderthread.moc \
$(gb_CustomTarget_workdir)/static/qt5-mandelbrot/mandelbrotwidget.moc \
qt5_mandelbrot_MOCDEFS_H := $(gb_CustomTarget_workdir)/static/qt5-mandelbrot/moc_predefs.h
qt5_mandelbrot_MOCDEFS_CXX := $(gb_CustomTarget_workdir)/static/qt5-mandelbrot/moc_dummy.cxx
qt5_mandelbrot_WORKDIR := $(gb_CustomTarget_workdir)/static/qt5-mandelbrot/.dir
$(qt5_mandelbrot_MOCDEFS_CXX): | $(qt5_mandelbrot_WORKDIR)
touch $@
$(qt5_mandelbrot_MOCDEFS_H): $(qt5_mandelbrot_MOCDEFS_CXX) | $(qt5_mandelbrot_WORKDIR)
$(call gb_Output_announce,$(subst $(WORKDIR)/,,$@),$(true),CXX,1)
$(call gb_Trace_StartRange,$(subst $(WORKDIR)/,,$@),CXX)
$(CXX) -pipe -O2 -std=gnu++11 -fno-exceptions $(gb_EMSCRIPTEN_CPPFLAGS) -dM -E -o $@ $<
$(call gb_Trace_EndRange,$(subst $(WORKDIR)/,,$@),CXX)
$(gb_CustomTarget_workdir)/static/qt5-mandelbrot/%.moc : \
$(SRCDIR)/static/source/qt5-mandelbrot/%.h \
$(qt5_mandelbrot_MOCDEFS_H) | $(qt5_mandelbrot_WORKDIR)
$(call gb_Output_announce,$(subst $(WORKDIR)/,,$@),$(true),MOC,1)
$(call gb_Trace_StartRange,$(subst $(WORKDIR)/,,$@),MOC)
$(MOC5) --include $(qt5_mandelbrot_MOCDEFS_H) $(gb_EMSCRIPTEN_QTDEFS) $< -o $@
$(call gb_Trace_EndRange,$(subst $(WORKDIR)/,,$@),MOC)
# vim: set noet sw=4:
static/Executable_wasm-qt5-mandelbrot.mk
-32
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@@ -1,32 +0,0 @@
# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
#
# This file is part of the LibreOffice project.
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
$(eval $(call gb_Executable_Executable,wasm-qt5-mandelbrot))
$(eval $(call gb_Executable_use_custom_headers,wasm-qt5-mandelbrot,static/qt5-mandelbrot))
$(eval $(call gb_Executable_use_externals,wasm-qt5-mandelbrot,\
graphite \
freetype \
harfbuzz \
libpng \
qt5 \
))
$(eval $(call gb_Executable_add_exception_objects,wasm-qt5-mandelbrot,\
static/source/qt5-mandelbrot/main \
static/source/qt5-mandelbrot/mandelbrotwidget \
static/source/qt5-mandelbrot/renderthread \
))
$(eval $(call gb_Executable_add_defs,wasm-qt5-mandelbrot,\
-DVCL_INTERNALS \
))
# vim: set noet sw=4 ts=4:
static/Module_static.mk
-4
View File
@@ -22,10 +22,6 @@ $(eval $(call gb_Module_add_targets,static,\
Package_favicon \
Package_unoembind \
StaticLibrary_unoembind \
$(if $(ENABLE_QT5), \
CustomTarget_wasm-qt5-mandelbrot_moc \
Executable_wasm-qt5-mandelbrot \
) \
))
endif
static/README.wasm.md
-1
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@@ -22,7 +22,6 @@ The build generates a Writer-only LO build. You should be able to run either
$ emrun --serve_after_close workdir/installation/LibreOffice/emscripten/qt_soffice.html
$ emrun --serve_after_close workdir/LinkTarget/Executable/qt_vcldemo.html
$ emrun --serve_after_close workdir/LinkTarget/Executable/qt_wasm-qt5-mandelbrot.html
REMINDER: Always start new tabs in the browser, reload might fail / cache!
INFO: latest browser won't work anymore with 0.0.0.0 and need 127.0.0.1.
static/source/qt5-mandelbrot/main.cxx
-66
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@@ -1,66 +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 "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();
}
static/source/qt5-mandelbrot/mandelbrotwidget.cxx
-228
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@@ -1,228 +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 "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());
}
static/source/qt5-mandelbrot/mandelbrotwidget.h
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@@ -1,91 +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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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;
};
static/source/qt5-mandelbrot/renderthread.cxx
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@@ -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));
}
static/source/qt5-mandelbrot/renderthread.h
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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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****************************************************************************/
#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;
static constexpr int ColormapSize = 512;
uint m_colormap[ColormapSize];
};