QT OpenGL Memory Leak

Question

My application contains a QTimer, as the main clock, and a GLCanvas object. The timer is calling the canvas updateGL function and the updateGL then calls the paintGL.

I noticed a big memory leak of approximately 100kb/s which exists even if paintGL is completely empty and nothing is being rendered. If I stop the updateGL call, the memory leak disappears.

Although all my code is commented out and the leak persists. Is there some sort of clearing I need to do or did I make a mistake? Any help would be appreciated.

    void GLCanvas::initializeGL() {
        glClearColor(21.0f/256.0f,21.0f/256.0f, 21.0f/256.0f, 1);
        glEnable(GL_DEPTH_TEST);
        glDepthFunc(GL_LEQUAL);
    }

    void GLCanvas::resizeGL(int width, int height) {
        glViewport(0, 0, width, height);
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        gluPerspective(45, (float)width/(float)height, 1, 1000);
        glMatrixMode(GL_MODELVIEW);
    }



    void GLCanvas::paintGL() {
        // Nothing
    }

Answer 1

How often do your timer call update()?

What is the timer for? Maybe you can work your way out of the Qtimer for such important task.