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Execution policy (multithreading)

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This commit is contained in:
Jakub Melka
2020-01-18 14:55:26 +01:00
parent db493db3cc
commit 1fd01c14fd
14 changed files with 266 additions and 34 deletions
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3
PdfForQtViewer/pdfdocumentpropertiesdialog.cpp
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@ -23,6 +23,7 @@
#include "pdffont.h"
#include "pdfutils.h"
#include "pdfexception.h"
#include "pdfexecutionpolicy.h"
#include <QLocale>
#include <QPageSize>
@ -369,7 +370,7 @@ void PDFDocumentPropertiesDialog::initializeFonts(const pdf::PDFDocument* docume
};
pdf::PDFIntegerRange<pdf::PDFInteger> indices(pdf::PDFInteger(0), pageCount);
std::for_each(std::execution::parallel_policy(), indices.begin(), indices.end(), processPage);
pdf::PDFExecutionPolicy::execute(pdf::PDFExecutionPolicy::Scope::Page, indices.begin(), indices.end(), processPage);
};
m_future = QtConcurrent::run(createFontInfo);
connect(&m_futureWatcher, &QFutureWatcher<void>::finished, this, &PDFDocumentPropertiesDialog::onFontsFinished);

2
PdfForQtViewer/pdfviewermainwindow.cpp
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@ -34,6 +34,7 @@
#include "pdfitemmodels.h"
#include "pdfutils.h"
#include "pdfsendmail.h"
#include "pdfexecutionpolicy.h"
#include <QSettings>
#include <QFileDialog>
@ -776,6 +777,7 @@ void PDFViewerMainWindow::onViewerSettingsChanged()
m_pdfWidget->getDrawWidgetProxy()->setPreferredMeshResolutionRatio(m_settings->getPreferredMeshResolutionRatio());
m_pdfWidget->getDrawWidgetProxy()->setMinimalMeshResolutionRatio(m_settings->getMinimalMeshResolutionRatio());
m_pdfWidget->getDrawWidgetProxy()->setColorTolerance(m_settings->getColorTolerance());
pdf::PDFExecutionPolicy::setStrategy(m_settings->getMultithreadingStrategy());
updateRenderingOptionActions();
}

5
PdfForQtViewer/pdfviewersettings.cpp
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@ -53,6 +53,7 @@ void PDFViewerSettings::readSettings(QSettings& settings, const pdf::PDFCMSSetti
m_settings.m_instancedFontCacheLimit = settings.value("instancedFontCacheLimit", defaultSettings.m_instancedFontCacheLimit).toInt();
m_settings.m_allowLaunchApplications = settings.value("allowLaunchApplications", defaultSettings.m_allowLaunchApplications).toBool();
m_settings.m_allowLaunchURI = settings.value("allowLaunchURI", defaultSettings.m_allowLaunchURI).toBool();
m_settings.m_multithreadingStrategy = static_cast<pdf::PDFExecutionPolicy::Strategy>(settings.value("mutlithreadingStrategy", static_cast<int>(defaultSettings.m_multithreadingStrategy)).toInt());
settings.endGroup();
settings.beginGroup("ColorManagementSystemSettings");
@ -89,6 +90,7 @@ void PDFViewerSettings::writeSettings(QSettings& settings)
settings.setValue("instancedFontCacheLimit", m_settings.m_instancedFontCacheLimit);
settings.setValue("allowLaunchApplications", m_settings.m_allowLaunchApplications);
settings.setValue("allowLaunchURI", m_settings.m_allowLaunchURI);
settings.setValue("mutlithreadingStrategy", static_cast<int>(m_settings.m_multithreadingStrategy));
settings.endGroup();
settings.beginGroup("ColorManagementSystemSettings");
@ -202,7 +204,8 @@ PDFViewerSettings::Settings::Settings() :
m_compiledPageCacheLimit(128 * 1024),
m_thumbnailsCacheLimit(PIXMAP_CACHE_LIMIT),
m_fontCacheLimit(pdf::DEFAULT_FONT_CACHE_LIMIT),
m_instancedFontCacheLimit(pdf::DEFAULT_REALIZED_FONT_CACHE_LIMIT)
m_instancedFontCacheLimit(pdf::DEFAULT_REALIZED_FONT_CACHE_LIMIT),
m_multithreadingStrategy(pdf::PDFExecutionPolicy::Strategy::PageMultithreaded)
{
}

4
PdfForQtViewer/pdfviewersettings.h
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@ -20,6 +20,7 @@
#include "pdfrenderer.h"
#include "pdfcms.h"
#include "pdfexecutionpolicy.h"
#include <QObject>
@ -55,6 +56,7 @@ public:
pdf::PDFReal m_colorTolerance;
bool m_allowLaunchApplications;
bool m_allowLaunchURI;
pdf::PDFExecutionPolicy::Strategy m_multithreadingStrategy = pdf::PDFExecutionPolicy::Strategy::PageMultithreaded;
// Cache settings
int m_compiledPageCacheLimit;
@ -101,6 +103,8 @@ public:
const pdf::PDFCMSSettings& getColorManagementSystemSettings() const { return m_colorManagementSystemSettings; }
void setColorManagementSystemSettings(const pdf::PDFCMSSettings& settings) { m_colorManagementSystemSettings = settings; }
pdf::PDFExecutionPolicy::Strategy getMultithreadingStrategy() const { return m_settings.m_multithreadingStrategy; }
signals:
void settingsChanged();

9
PdfForQtViewer/pdfviewersettingsdialog.cpp
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@ -59,6 +59,10 @@ PDFViewerSettingsDialog::PDFViewerSettingsDialog(const PDFViewerSettings::Settin
ui->multisampleAntialiasingSamplesCountComboBox->addItem(QString::number(i), i);
}
ui->multithreadingComboBox->addItem(tr("Single thread"), static_cast<int>(pdf::PDFExecutionPolicy::Strategy::SingleThreaded));
ui->multithreadingComboBox->addItem(tr("Multithreading (load balanced)"), static_cast<int>(pdf::PDFExecutionPolicy::Strategy::PageMultithreaded));
ui->multithreadingComboBox->addItem(tr("Multithreading (maximum threads)"), static_cast<int>(pdf::PDFExecutionPolicy::Strategy::AlwaysMultithreaded));
// Load CMS data
ui->cmsTypeComboBox->addItem(pdf::PDFCMSManager::getSystemName(pdf::PDFCMSSettings::System::Generic), int(pdf::PDFCMSSettings::System::Generic));
ui->cmsTypeComboBox->addItem(pdf::PDFCMSManager::getSystemName(pdf::PDFCMSSettings::System::LittleCMS2), int(pdf::PDFCMSSettings::System::LittleCMS2));
@ -200,6 +204,7 @@ void PDFViewerSettingsDialog::loadData()
ui->multisampleAntialiasingSamplesCountComboBox->setCurrentIndex(-1);
}
ui->prefetchPagesCheckBox->setChecked(m_settings.m_prefetchPages);
ui->multithreadingComboBox->setCurrentIndex(ui->multithreadingComboBox->findData(static_cast<int>(m_settings.m_multithreadingStrategy)));
// Rendering
ui->antialiasingCheckBox->setChecked(m_settings.m_features.testFlag(pdf::PDFRenderer::Antialiasing));
@ -397,6 +402,10 @@ void PDFViewerSettingsDialog::saveData()
{
m_cmsSettings.profileDirectory = ui->cmsProfileDirectoryEdit->text();
}
else if (sender == ui->multithreadingComboBox)
{
m_settings.m_multithreadingStrategy = static_cast<pdf::PDFExecutionPolicy::Strategy>(ui->multithreadingComboBox->currentData().toInt());
}
loadData();
}

42
PdfForQtViewer/pdfviewersettingsdialog.ui
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@ -26,7 +26,7 @@
<item>
<widget class="QStackedWidget" name="stackedWidget">
<property name="currentIndex">
<number>5</number>
<number>0</number>
</property>
<widget class="QWidget" name="enginePage">
<layout class="QVBoxLayout" name="enginePageLayout">
@ -57,6 +57,9 @@
</property>
</widget>
</item>
<item row="0" column="1">
<widget class="QComboBox" name="renderingEngineComboBox"/>
</item>
<item row="1" column="0">
<widget class="QLabel" name="multisampleAntialiasingLabel">
<property name="text">
@ -64,6 +67,16 @@
</property>
</widget>
</item>
<item row="2" column="1">
<widget class="QComboBox" name="multisampleAntialiasingSamplesCountComboBox"/>
</item>
<item row="3" column="0">
<widget class="QLabel" name="prefetchPagesLabel">
<property name="text">
<string>Prefetch pages</string>
</property>
</widget>
</item>
<item row="2" column="0">
<widget class="QLabel" name="multisampleAntiailasingSamplesLabel">
<property name="text">
@ -71,11 +84,12 @@
</property>
</widget>
</item>
<item row="2" column="1">
<widget class="QComboBox" name="multisampleAntialiasingSamplesCountComboBox"/>
</item>
<item row="0" column="1">
<widget class="QComboBox" name="renderingEngineComboBox"/>
<item row="3" column="1">
<widget class="QCheckBox" name="prefetchPagesCheckBox">
<property name="text">
<string>Enable</string>
</property>
</widget>
</item>
<item row="0" column="0">
<widget class="QLabel" name="renderingEngineLabel">
@ -84,26 +98,22 @@
</property>
</widget>
</item>
<item row="3" column="0">
<widget class="QLabel" name="prefetchPagesLabel">
<item row="4" column="0">
<widget class="QLabel" name="multithreadingLabel">
<property name="text">
<string>Prefetch pages</string>
<string>Multithreading strategy</string>
</property>
</widget>
</item>
<item row="3" column="1">
<widget class="QCheckBox" name="prefetchPagesCheckBox">
<property name="text">
<string>Enable</string>
</property>
</widget>
<item row="4" column="1">
<widget class="QComboBox" name="multithreadingComboBox"/>
</item>
</layout>
</item>
<item>
<widget class="QLabel" name="engineInfoLabel">
<property name="text">
<string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Select rendering method according to your needs. &lt;span style=&quot; font-weight:600;&quot;&gt;Software rendering&lt;/span&gt; is much slower than hardware accelerated rendering using &lt;span style=&quot; font-weight:600;&quot;&gt;OpenGL rendering&lt;/span&gt;, but it works when OpenGL is not available at your platform. OpenGL rendering is selected as default and is recommended.&lt;/p&gt;&lt;p&gt;OpenGL rendering uses&lt;span style=&quot; font-weight:600;&quot;&gt; multisample antialiasing (MSAA)&lt;/span&gt;, which provides good quality antialiasing. You can turn this feature on or off, but without antialiasing, bad quality image can occur. Samples count affect how much samples per pixel are considered to determine pixel color. It can be a value 1, 2, 4, 8, and 16. Most modern GPUs support at least value 8. Lower this value, if your GPU doesn't support the desired sample count.&lt;/p&gt;&lt;p&gt;&lt;span style=&quot; font-weight:600;&quot;&gt;Prefetch pages &lt;/span&gt;prefetches (pre-renders) pages next to currently viewed pages, to avoid flickering during scrolling. Prefetched pages are stored in the page cache.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
<string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Select rendering method according to your needs. &lt;span style=&quot; font-weight:600;&quot;&gt;Software rendering&lt;/span&gt; is much slower than hardware accelerated rendering using &lt;span style=&quot; font-weight:600;&quot;&gt;OpenGL rendering&lt;/span&gt;, but it works when OpenGL is not available at your platform. OpenGL rendering is selected as default and is recommended.&lt;/p&gt;&lt;p&gt;OpenGL rendering uses&lt;span style=&quot; font-weight:600;&quot;&gt; multisample antialiasing (MSAA)&lt;/span&gt;, which provides good quality antialiasing. You can turn this feature on or off, but without antialiasing, bad quality image can occur. Samples count affect how much samples per pixel are considered to determine pixel color. It can be a value 1, 2, 4, 8, and 16. Most modern GPUs support at least value 8. Lower this value, if your GPU doesn't support the desired sample count.&lt;/p&gt;&lt;p&gt;&lt;span style=&quot; font-weight:600;&quot;&gt;Prefetch pages &lt;/span&gt;prefetches (pre-renders) pages next to currently viewed pages, to avoid flickering during scrolling. Prefetched pages are stored in the page cache.&lt;/p&gt;&lt;p&gt;&lt;span style=&quot; font-weight:600;&quot;&gt;Multithreading strategy &lt;/span&gt;defines how program will use CPU cores. Engine can use multiple cores. Strategy defines, how engine will use these cores. &lt;span style=&quot; font-weight:600;&quot;&gt;Single thread&lt;/span&gt; strategy uses only one CPU core for rendering page, and for some operations, they aren't parallelized, at the cost of more time needed for operation to be finished. But still, each page will use its own thread to be compiled/drawn. On the other side, there are two multithreading strategies, former is load balanced, latter uses maximum threads. Load balanced strategy tries to optimize number of threads to fit CPU cores, while maximum threads strategy will spawn as much threads as possible to process operations, which can be sometimes unoptimal.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
</property>
<property name="wordWrap">
<bool>true</bool>