Memory Leak in Draw method with QPainter and QOpenGLPaintDevice

[kane]

Hello,
the memory usage of my draw method is growing in a exponential way :). I dont know where the Problem is. My class is inheriting from QWindow and QOpenGLFunctions. I am drawing out of the paint event. The draw method is called by a signal from a other thread, which implements a loop for updating and drawing(signal).
@
void Initialize() {
loadAssets( "asset_list.xml" );

// initialize graphics
setScreen( m_screen );
setSurfaceType( QSurface::OpenGLSurface );
setWindowState( Qt::WindowFullScreen );

resize( 1280, 720 );
show();

m_context = new QOpenGLContext( this );

m_context->setFormat( requestedFormat() );
m_context->create();
m_context->makeCurrent( this );

initializeOpenGLFunctions();

m_paintDevice = new QOpenGLPaintDevice;
m_paintDevice->setSize( size() );

m_context->doneCurrent();
}

void Draw() {
if( !isExposed() )
return;

m_context->makeCurrent( this );

QPainter painter( m_paintDevice );
painter.beginNativePainting();

glClearColor( 1.0f, 1.0f, 1.0f, 0 );
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT );

for( auto unitWItr = m_units.begin(); unitWItr != m_units.end(); ) {
UnitPtr unit = unitWItr->lock();

if( unit.get() != NULL ) {
// unit is only on list, if asset is accessible with formally set assetId
Asset *asset = m_assets.at( unit->body->assetId );
painter.drawPixmap( unit->kinematic->pos.getX(), unit->kinematic->pos.getY(), unit->body->width, unit->body->height , *asset->pixmap );
}
else {
// if unit is not valid anymore, delete from draw list
unitWItr = m_units.erase( unitWItr );
continue;
}

if( unitWItr != m_units.end() )
++unitWItr;
}

painter.endNativePainting();
m_context->swapBuffers( this );
m_context->doneCurrent();
}
@

It would be great, if you can help me. Thanks!

[mcosta]

Hi,

in order to discover memory leaks I suggest you to use "valgrind":http://valgrind.org/.