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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include <QtCore/QDebug>
#include <QtCore/QLoggingCategory>
#include <QtCore/QOperatingSystemVersion>
#include <QtGui/QOpenGLContext>
#include <QtGui/QScreen>
#include <QtGui/QSurfaceFormat>
#include <QtWidgets/QApplication>
#include <QtWidgets/QGroupBox>
#include <QtWidgets/QHBoxLayout>
#include <QtWidgets/QMainWindow>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QVBoxLayout>
#include <QtWebEngineWidgets/QWebEngineView>
// Manual test for checking if WebGL (1 or 2) works.
// Set environment variable QTWEBENGINE_GL_TYPE to one of the following to try and switch
// the underlying GL implementation (mostly Windows): "desktop", "gles", "gles3", "software".
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = nullptr);
QSize sizeHint() const;
private:
QWebEngineView *view = nullptr;
};
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
{
QWidget *centralWidget = new QWidget;
QGroupBox *horizontalGroupBox = new QGroupBox;
QHBoxLayout *buttonLayout = new QHBoxLayout;
QPushButton *exButton1 = new QPushButton(QStringLiteral("Aquarium (WebGL 1)"));
QPushButton *exButton2 = new QPushButton(QStringLiteral("Lots of objects (WebGL 1)"));
QPushButton *exButton3 = new QPushButton(QStringLiteral("Instanced triangles (WebGL 2)"));
buttonLayout->addWidget(exButton1);
buttonLayout->addWidget(exButton2);
buttonLayout->addWidget(exButton3);
horizontalGroupBox->setLayout(buttonLayout);
const QUrl exUrl1 =
QUrl(QStringLiteral(
"http://webglsamples.org/aquarium/aquarium.html"));
const QUrl exUrl2 =
QUrl(QStringLiteral(
"http://webglsamples.org/lots-o-objects/lots-o-objects-draw-elements.html"));
const QUrl exUrl3 =
QUrl(QStringLiteral(
"http://webglsamples.org/WebGL2Samples/#transform_feedback_instanced"));
view = new QWebEngineView;
connect(exButton1, &QPushButton::clicked, view, [=](){
view->setUrl(exUrl1);
});
connect(exButton2, &QPushButton::clicked, view, [=](){
view->setUrl(exUrl2);
});
connect(exButton3, &QPushButton::clicked, view, [=](){
view->setUrl(exUrl3);
});
QVBoxLayout *centralLayout = new QVBoxLayout;
centralLayout->addWidget(horizontalGroupBox);
centralLayout->addWidget(view, 1);
centralWidget->setLayout(centralLayout);
setCentralWidget(centralWidget);
view->setUrl(QUrl(QStringLiteral("http://webglsamples.org/aquarium/aquarium.html")));
setWindowTitle(tr("WebGL 1 and 2 examples"));
}
QSize MainWindow::sizeHint() const
{
const QRect desktopRect = QGuiApplication::primaryScreen()->geometry();
const QSize size = desktopRect.size() * qreal(0.9);
return size;
}
bool isWindows()
{
return QOperatingSystemVersion::currentType() == QOperatingSystemVersion::Windows;
}
// Easy snippets to copy to command line for testing for UNIX only.
// QTWEBENGINE_GL_TYPE=desktop ./webgl
// QTWEBENGINE_GL_TYPE=gles ./webgl
// QTWEBENGINE_GL_TYPE=gles3 ./webgl
// QTWEBENGINE_GL_TYPE=software ./webgl
int main(int argc, char *argv[])
{
// Not all options are relevant for all platforms.
const QString desktopGL = QStringLiteral("desktop");
const QString angle = QStringLiteral("angle"); // Same as gles really, just an alias.
const QString gles = QStringLiteral("gles"); // ANGLE on Windows.
const QString gles3 = QStringLiteral("gles3"); // ANGLE on Windows.
const QString softwareGL = QStringLiteral("software");
QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
QString glType = qEnvironmentVariable("QTWEBENGINE_GL_TYPE");
if (glType.isEmpty()) {
if (isWindows())
glType = gles3;
else
glType = desktopGL;
}
if (glType == desktopGL) {
QApplication::setAttribute(Qt::AA_UseDesktopOpenGL);
qInfo() << QStringLiteral("Trying to use Desktop OpenGL.\n");
} else if (glType == gles || glType == gles3 || glType == angle) {
QApplication::setAttribute(Qt::AA_UseOpenGLES);
if (glType == gles || glType == angle)
qInfo() << QStringLiteral("Trying to use OpenGL ES 2.\n");
if (glType == gles3)
qInfo() << QStringLiteral("Trying to use OpenGL ES 3.\n");
} else if (glType == softwareGL) {
QApplication::setAttribute(Qt::AA_UseSoftwareOpenGL);
qInfo() << QStringLiteral("Trying to use software OpenGL.\n");
}
if (glType == gles3) {
// Set OpenGL ES version 3.
QSurfaceFormat format;
format.setSamples(4);
format.setDepthBufferSize(24);
format.setStencilBufferSize(8);
format.setVersion(3, 0);
QSurfaceFormat::setDefaultFormat(format);
}
QApplication a(argc, argv);
QLoggingCategory::setFilterRules(QStringLiteral("qt.scenegraph.general=true"));
QOpenGLContext *globalSharedContext = QOpenGLContext::globalShareContext();
qInfo() << "Global OpenGL context format: " << globalSharedContext->format() << "\n";
MainWindow w;
// Move middle-ish.
const QRect desktopRect = QGuiApplication::primaryScreen()->geometry();
const QSize pos = desktopRect.size() * qreal(0.1);
w.move(pos.width(), pos.height());
w.show();
return a.exec();
}
#include "main.moc"
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