qplatformopenglcontext.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qplatformopenglcontext.h"
 
#include <QOpenGLFunctions>
 
QT_BEGIN_NAMESPACE
 
class QPlatformOpenGLContextPrivate
{
public:
    QPlatformOpenGLContextPrivate() : context(nullptr) {}
 
    QOpenGLContext *context;
};
 
QPlatformOpenGLContext::QPlatformOpenGLContext()
    : d_ptr(new QPlatformOpenGLContextPrivate)
{
}
 
QPlatformOpenGLContext::~QPlatformOpenGLContext()
{
}
 
void QPlatformOpenGLContext::initialize()
{
}
 
GLuint QPlatformOpenGLContext::defaultFramebufferObject(QPlatformSurface *) const
{
    return 0;
}
 
QOpenGLContext *QPlatformOpenGLContext::context() const
{
    Q_D(const QPlatformOpenGLContext);
    return d->context;
}
 
void QPlatformOpenGLContext::setContext(QOpenGLContext *context)
{
    Q_D(QPlatformOpenGLContext);
    d->context = context;
}
 
bool QPlatformOpenGLContext::parseOpenGLVersion(const QByteArray &versionString, int &major, int &minor)
{
    bool majorOk = false;
    bool minorOk = false;
    QList<QByteArray> parts = versionString.split(' ');
    if (versionString.startsWith(QByteArrayLiteral("OpenGL ES"))) {
        if (parts.size() >= 3) {
            QList<QByteArray> versionParts = parts.at(2).split('.');
            if (versionParts.size() >= 2) {
                major = versionParts.at(0).toInt(&majorOk);
                minor = versionParts.at(1).toInt(&minorOk);
                // Nexus 6 has "OpenGL ES 3.0V@95.0 (GIT@I86da836d38)"
                if (!minorOk)
                    if (int idx = versionParts.at(1).indexOf('V'))
                        minor = versionParts.at(1).left(idx).toInt(&minorOk);
            } else {
                qWarning("Unrecognized OpenGL ES version");
            }
        } else {
            // If < 3 parts to the name, it is an unrecognised OpenGL ES
            qWarning("Unrecognised OpenGL ES version");
        }
    } else {
        // Not OpenGL ES, but regular OpenGL, the version numbers are first in the string
        QList<QByteArray> versionParts = parts.at(0).split('.');
        if (versionParts.size() >= 2) {
            major = versionParts.at(0).toInt(&majorOk);
            minor = versionParts.at(1).toInt(&minorOk);
        } else {
            qWarning("Unrecognized OpenGL version");
        }
    }
 
    if (!majorOk || !minorOk)
        qWarning("Unrecognized OpenGL version");
    return (majorOk && minorOk);
}
 
void QPlatformOpenGLContext::beginFrame()
{
}
 
void QPlatformOpenGLContext::endFrame()
{
}
 
QT_END_NAMESPACE