[Qt 4.6.3/OpenGL 4.1] : Unrecognized OpenGL

[didier]

Hi,

I'm encountering a problem with integrating a QGLWidget.

The message "Unrecognized OpenGL" appears on console.
And glGetString always returns NULL.

My graphic driver is up-to-date.

I success in compiling and running a trivial openGL program and glGetStrings works well.

Someone can tell me what to do ?
Thanks a lot.:)

[Dong Back Kim]

Hi,

I'm encountering a problem with integrating a QGLWidget.

The message "Unrecognized OpenGL" appears on console.
And glGetString always returns NULL.

My graphic driver is up-to-date.

I success in compiling and running a trivial openGL program and glGetStrings works well.

Someone can tell me what to do ?
Thanks a lot.:)

Are you using overpainting with the QGLWidget?

[didier]

Are you using overpainting with the QGLWidget?

A this time, no. I have just written this piece of code.



class GLWidget :public QGLWidget
{
Q_OBJECT
public:
GLWidget(QWidget* argParent = 0,
const QGLWidget* argShareWidget = 0,
Qt::WindowFlags argFlags = 0 );

signals:
void sizeChanges(QSize const&);
void doubleClick(QPoint const&);
void click(QPoint const&);

protected:
void initializeGL();
void resizeGL(int argWidth, int argHeight);
void mouseDoubleClickEvent(QMouseEvent* event);
void mouseReleaseEvent(QMouseEvent* event);
void paintGL();

};



#include "../include/GLWidget.h"

GLWidget::GLWidget(QWidget* argParent,
const QGLWidget* argShareWidget,
Qt::WindowFlags argFlags)

:QGLWidget(argParent,
argShareWidget,
argFlags)
{
}

void GLWidget::initializeGL()
{
}

void GLWidget::resizeGL(int argWidth, int argHeight)
{
emit sizeChanges(QSize(argWidth, argHeight));
}


void GLWidget::paintGL()
{
}

void GLWidget::mouseDoubleClickEvent(QMouseEvent* event)
{
emit doubleClick(event->pos());
}

void GLWidget::mouseReleaseEvent(QMouseEvent* event)
{
emit click(event->pos());
}

I've believed, an instant, it's because my OpenGL implementation is 4.1 and Qt 4.6.3 wouldn't recognize OpenGL 4.1 because of enum QGLFormat::OpenGLVersionFlag's definition.

About glGetString(). The problem is over. I've discovered glContext is inititialized in after QGLWidget() constructor. In paintGL(), it works well.

[Dong Back Kim]

A this time, no. I have just written this piece of code.



class GLWidget :public QGLWidget
{
Q_OBJECT
public:
GLWidget(QWidget* argParent = 0,
const QGLWidget* argShareWidget = 0,
Qt::WindowFlags argFlags = 0 );

signals:
void sizeChanges(QSize const&);
void doubleClick(QPoint const&);
void click(QPoint const&);

protected:
void initializeGL();
void resizeGL(int argWidth, int argHeight);
void mouseDoubleClickEvent(QMouseEvent* event);
void mouseReleaseEvent(QMouseEvent* event);
void paintGL();

};



#include "../include/GLWidget.h"

GLWidget::GLWidget(QWidget* argParent,
const QGLWidget* argShareWidget,
Qt::WindowFlags argFlags)

:QGLWidget(argParent,
argShareWidget,
argFlags)
{
}

void GLWidget::initializeGL()
{
}

void GLWidget::resizeGL(int argWidth, int argHeight)
{
emit sizeChanges(QSize(argWidth, argHeight));
}


void GLWidget::paintGL()
{
}

void GLWidget::mouseDoubleClickEvent(QMouseEvent* event)
{
emit doubleClick(event->pos());
}

void GLWidget::mouseReleaseEvent(QMouseEvent* event)
{
emit click(event->pos());
}

I've believed, an instant, it's because my OpenGL implementation is 4.1 and Qt 4.6.3 wouldn't recognize OpenGL 4.1 because of enum QGLFormat::OpenGLVersionFlag's definition.

About glGetString(). The problem is over. I've discovered glContext is inititialized in after QGLWidget() constructor. In paintGL(), it works well.

Good to know about QGLFormat::OpenGLVersionFlag.