Create a Core Profile OpenGL app

[A Former User]

Hi,

I want to create an OpenGL app with Qt but my code segfault (11) on mac. My code is very short. The same code works with OpenGL 2.1.

#include <GL/glew.h>                                   
#include <iostream>                                    
                                                       
#include <QApplication>                                
#include <QOpenGLWidget>                               
                                                       
int main(int argc, char** argv){          
        QApplication app(argc, argv);                  
                                                       
        QSurfaceFormat format;                         
        format.setMajorVersion(3);                     
        format.setMinorVersion(2);                     
        format.setProfile(QSurfaceFormat::CoreProfile);
                                                       
        QOpenGLWidget opengl;                          
        opengl.setFormat(format);                      
        opengl.setGeometry(30, 30, 600, 600);          
        opengl.show();                                 
                                                       
        return app.exec();                             
}                                                      

[EDIT]: I just test on Windows and it's works. What is the problem with mac ?

Best regards,
Robin

[A Former User]

Ok I found the solution. I suppose mac use only the default opengl surface.
I juste change my code like that: QSurfaceFormat::setDefaultFormat( format );

Tell me why if you know :)

[Thoenu]

Hi,
OSX only supports OpenGL 4.1. Core Profile and Compatibility mode (means only 4.1. Specification works). Compatibility Mode is only supported until OpenGL 2.1. So for me it works this way:

#ifdef APPLE
format.setVersion(4, 1);
format.setProfile(QSurfaceFormat::CoreProfile);
#else
format.setVersion(4, 5);
format.setProfile(QSurfaceFormat::CompatibilityProfile);
#endif
QSurfaceFormat::setDefaultFormat(format);