Issue #46: Program does not launch/freezes on Windows 10/Windows Server 2022 (x64)

Pdf4QtLib/sources/pdfdrawwidget.cpp

@@ -44,7 +44,7 @@ PDFWidget::PDFWidget(const PDFCMSManager* cmsManager, RendererEngine engine, int
     m_verticalScrollBar(nullptr),
     m_proxy(nullptr)
 {
-    m_drawWidget = createDrawWidget(engine, samplesCount);
+    m_drawWidget = createDrawWidget(getEffectiveRenderer(engine), samplesCount);
     m_horizontalScrollBar = new QScrollBar(Qt::Horizontal, this);
     m_verticalScrollBar = new QScrollBar(Qt::Vertical, this);
 
@@ -90,6 +90,8 @@ void PDFWidget::setDocument(const PDFModifiedDocument& document)
 
 void PDFWidget::updateRenderer(RendererEngine engine, int samplesCount)
 {
+    engine = getEffectiveRenderer(engine);
+
     PDFOpenGLDrawWidget* openglDrawWidget = qobject_cast<PDFOpenGLDrawWidget*>(m_drawWidget->getWidget());
     PDFDrawWidget* softwareDrawWidget = qobject_cast<PDFDrawWidget*>(m_drawWidget->getWidget());
 
@@ -207,6 +209,16 @@ void PDFWidget::addInputInterface(IDrawWidgetInputInterface* inputInterface)
     }
 }
 
+RendererEngine PDFWidget::getEffectiveRenderer(RendererEngine rendererEngine)
+{
+    if (rendererEngine == RendererEngine::OpenGL && !pdf::PDFRendererInfo::isHardwareAccelerationSupported())
+    {
+        return RendererEngine::Software;
+    }
+
+    return rendererEngine;
+}
+
 PDFFormManager* PDFWidget::getFormManager() const
 {
     return m_formManager;
@@ -591,8 +603,11 @@ void PDFOpenGLDrawWidget::initializeGL()
 
 void PDFOpenGLDrawWidget::paintGL()
 {
+    if (this->isValid())
+    {
         QPainter painter(this);
         getPDFWidget()->getDrawWidgetProxy()->draw(&painter, this->rect());
+    }
 }
 
 PDFDrawWidget::PDFDrawWidget(PDFWidget* widget, QWidget* parent) :

Pdf4QtLib/sources/pdfdrawwidget.h

@@ -106,6 +106,8 @@ signals:
     void pageRenderingErrorsChanged(pdf::PDFInteger pageIndex, int errorsCount);
 
 private:
+    RendererEngine getEffectiveRenderer(RendererEngine rendererEngine);
+
     void updateRendererImpl();
     void onRenderingError(PDFInteger pageIndex, const QList<PDFRenderError>& errors);
     void onPageImageChanged(bool all, const std::vector<PDFInteger>& pages);

Pdf4QtLib/sources/pdfrenderer.cpp

@@ -29,6 +29,7 @@
 #include <QOffscreenSurface>
 #include <QOpenGLPaintDevice>
 #include <QOpenGLFramebufferObject>
+#include <QOpenGLFunctions>
 
 namespace pdf
 {
@@ -204,6 +205,12 @@ PDFRasterizer::~PDFRasterizer()
 
 void PDFRasterizer::reset(bool useOpenGL, const QSurfaceFormat& surfaceFormat)
 {
+    if (!PDFRendererInfo::isHardwareAccelerationSupported())
+    {
+        m_features.setFlag(FailedOpenGL, true);
+        m_features.setFlag(ValidOpenGL, false);
+    }
+
     if (useOpenGL != m_features.testFlag(UseOpenGL) || surfaceFormat != m_surfaceFormat)
     {
         // In either case, we must reset OpenGL
@@ -927,4 +934,78 @@ PDFRasterizerPool::PDFRasterizerPool(const PDFDocument* document,
     }
 }
 
+PDFCachedItem<PDFRendererInfo::Info> PDFRendererInfo::s_info;
+
+const PDFRendererInfo::Info& PDFRendererInfo::getHardwareAccelerationSupportedInfo()
+{
+    auto getInfo = []()
+    {
+        Info info;
+
+        QOffscreenSurface surface;
+        surface.create();
+
+        if (!surface.isValid())
+        {
+            info.renderer = PDFTranslationContext::tr("Unknown Device");
+            info.version = PDFTranslationContext::tr("?.?");
+            info.vendor = PDFTranslationContext::tr("Generic");
+            return info;
+        }
+
+        QOpenGLContext context;
+
+        if (!context.create())
+        {
+            info.renderer = PDFTranslationContext::tr("Unknown Device");
+            info.version = PDFTranslationContext::tr("?.?");
+            info.vendor = PDFTranslationContext::tr("Generic");
+            surface.destroy();
+            return info;
+        }
+
+        if (!context.makeCurrent(&surface))
+        {
+            info.renderer = PDFTranslationContext::tr("Unknown Device");
+            info.version = PDFTranslationContext::tr("?.?");
+            info.vendor = PDFTranslationContext::tr("Generic");
+            surface.destroy();
+            return info;
+        }
+
+        const char* versionStr = reinterpret_cast<const char*>(context.functions()->glGetString(GL_VERSION));
+        const char* vendorStr = reinterpret_cast<const char*>(context.functions()->glGetString(GL_VENDOR));
+        const char* rendererStr = reinterpret_cast<const char*>(context.functions()->glGetString(GL_RENDERER));
+
+        QString versionString = QString::fromLocal8Bit(versionStr, std::strlen(versionStr));
+        QString vendorString = QString::fromLocal8Bit(vendorStr, std::strlen(vendorStr));
+        QString rendererString = QString::fromLocal8Bit(rendererStr, std::strlen(rendererStr));
+
+        context.doneCurrent();
+        surface.destroy();
+
+        info.vendor = vendorString;
+        info.renderer = rendererString;
+        info.version = versionString;
+
+        QStringList versionStrSplitted = versionString.split('.', Qt::KeepEmptyParts);
+
+        if (versionStrSplitted.size() >= 2)
+        {
+            info.majorOpenGLVersion = versionStrSplitted[0].toInt();
+            info.minorOpenGLVersion = versionStrSplitted[1].toInt();
+        }
+
+        return info;
+    };
+
+    return s_info.get(getInfo);
+}
+
+bool PDFRendererInfo::isHardwareAccelerationSupported()
+{
+    const Info& info = getHardwareAccelerationSupportedInfo();
+    return std::make_pair(info.majorOpenGLVersion, info.minorOpenGLVersion) >= std::make_pair(REQUIRED_OPENGL_MAJOR_VERSION, REQUIRED_OPENGL_MINOR_VERSION);
+}
+
 }   // namespace pdf

Pdf4QtLib/sources/pdfrenderer.h

@@ -22,6 +22,7 @@
 #include "pdfexception.h"
 #include "pdfoperationcontrol.h"
 #include "pdfmeshqualitysettings.h"
+#include "pdfutils.h"
 
 #include <QMutex>
 #include <QSemaphore>
@@ -44,6 +45,30 @@ class PDFPrecompiledPage;
 class PDFAnnotationManager;
 class PDFOptionalContentActivity;
 
+class PDF4QTLIBSHARED_EXPORT PDFRendererInfo
+{
+public:
+    PDFRendererInfo() = delete;
+
+    struct Info
+    {
+        QString vendor;
+        QString renderer;
+        QString version;
+        int majorOpenGLVersion = 0;
+        int minorOpenGLVersion = 0;
+    };
+
+    static const Info& getHardwareAccelerationSupportedInfo();
+    static bool isHardwareAccelerationSupported();
+
+    static constexpr int REQUIRED_OPENGL_MAJOR_VERSION = 3;
+    static constexpr int REQUIRED_OPENGL_MINOR_VERSION = 2;
+
+private:
+    static PDFCachedItem<Info> s_info;
+};
+
 /// Renders the PDF page on the painter, or onto an image.
 class PDF4QTLIBSHARED_EXPORT PDFRenderer
 {
@@ -144,8 +169,9 @@ public:
 
     /// Resets the renderer. This function must be called from main GUI thread,
     /// it cannot be called from deferred threads, because it can create hidden
-    /// window (offscreen surface).
-    /// \param useOpenGL Use OpenGL for rendering
+    /// window (offscreen surface). If hardware renderer is required, and
+    /// none is available, then software renderer is used.
+    /// \param useOpenGL Use OpenGL for rendering (ignored if not available)
     /// \param surfaceFormat Surface format to render
     void reset(bool useOpenGL, const QSurfaceFormat& surfaceFormat);
 

Pdf4QtViewer/pdfprogramcontroller.cpp

@@ -2028,6 +2028,20 @@ void PDFProgramController::resetSettings()
     }
 }
 
+void PDFProgramController::checkHardwareOpenGLAvailability()
+{
+    if (m_settings->getRendererEngine() == pdf::RendererEngine::OpenGL &&
+        !pdf::PDFRendererInfo::isHardwareAccelerationSupported())
+    {
+        pdf::PDFRendererInfo::Info info = pdf::PDFRendererInfo::getHardwareAccelerationSupportedInfo();
+        QMessageBox::warning(m_mainWindow, tr("Warning"),
+                             tr("Hardware acceleration is not supported on this device. "
+                                "OpenGL version at least 3.2 is required. Software rendering is used instead. "
+                                "Available OpenGL is %1 using %2. You can turn off hardware acceleration "
+                                "in 'Tools' menu using 'Options' item to stop displaying this message.").arg(info.version, info.renderer));
+    }
+}
+
 void PDFProgramController::onActionOptionsTriggered()
 {
     PDFViewerSettingsDialog::OtherSettings otherSettings;

Pdf4QtViewer/pdfprogramcontroller.h

@@ -276,6 +276,8 @@ public:
     void writeSettings();
     void resetSettings();
 
+    void checkHardwareOpenGLAvailability();
+
     void performPrint();
     void performSave();
     void performSaveAs();

Pdf4QtViewer/pdfviewermainwindow.cpp

@@ -523,6 +523,7 @@ void PDFViewerMainWindow::showEvent(QShowEvent* event)
 {
     QMainWindow::showEvent(event);
     m_progressTaskbarIndicator->setWindow(windowHandle());
+    QTimer::singleShot(0, this, [this] { m_programController->checkHardwareOpenGLAvailability(); });
 }
 
 void PDFViewerMainWindow::dragEnterEvent(QDragEnterEvent* event)

Pdf4QtViewer/pdfviewermainwindowlite.cpp

@@ -412,8 +412,9 @@ void PDFViewerMainWindowLite::closeEvent(QCloseEvent* event)
 
 void PDFViewerMainWindowLite::showEvent(QShowEvent* event)
 {
-    Q_UNUSED(event);
+    QMainWindow::showEvent(event);
     m_progressTaskbarIndicator->setWindow(windowHandle());
+    QTimer::singleShot(0, this, [this] { m_programController->checkHardwareOpenGLAvailability(); });
 }
 
 void PDFViewerMainWindowLite::dragEnterEvent(QDragEnterEvent* event)