Qt5 OpenGL GLSL version error

Question

I\'m starting out on using OpenGL with Qt, and with Shaders (I have OpenGL experience, but not with shaders yet)

I\'m following this tutorial: http://releases.qt-pro

Answer 1

I've got the same error on my macbook (early 2011), and this answer helps me. Basically you deprecate to version120.

Answer 2

You should create an QGLFormat object and pass it to the QGLWidget as a constructor parameter. The QGLFormat object should be created as showed in the code below.

QGLFormat glFormat;
glFormat.setVersion( 3, 2 );
glFormat.setProfile( QGLFormat::CoreProfile );

Answer 3

Newer QOpenGLWidget doesn't support any constructor with QGLFormat. Instead, in your main.cpp, specify the default QSurfaceFormat for all QOpenGLWidget and QOpenGLContext as following:

// main.cpp
QSurfaceFormat glFormat;
glFormat.setVersion(3, 3);
glFormat.setProfile(QSurfaceFormat::CoreProfile);
QSurfaceFormat::setDefaultFormat(glFormat);

Now you should be able to use something like #version 330 core in your shader.