QOpenGLFunctions glGetString(GL_EXTENSIONS) is null

[8Observer8]

@Chris-Kawa said in QOpenGLFunctions glGetString(GL_EXTENSIONS) is null:

QString exts = QString::fromLatin1((const char*)ctx.functions()->glGetString(GL_EXTENSIONS)).replace(" ", "\n\t");

I have a same question. I try to show OpenGL version but I get empty string:

    QString version = QString::fromLatin1((const char*)glGetString(GL_VERSION));
    qDebug() << version;

[8Observer8]

@8Observer8 said in QOpenGLFunctions glGetString(GL_EXTENSIONS) is null:

I have a same question. I try to show OpenGL version but I get empty string:

I solved the problem. I activated a second video card on my laptop from code in main.cpp:

#ifdef _WIN32
#include <windows.h>
extern "C" __declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
extern "C" __declspec(dllexport) DWORD AmdPowerXpressRequestHighPerformance = 0x00000001;
#endif

#include "Widget.h"

#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();
    return a.exec();
}

It works too (without QString::fromLatin1):

qDebug() << (const char*)glGetString(GL_VERSION);