Memory Leak in Draw method with QPainter and QOpenGLPaintDevice
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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!
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Hi,
in order to discover memory leaks I suggest you to use "valgrind":http://valgrind.org/.
