how can QPixmap transformation to QBitmap faster

[duduqq]

Hello :
In my programe I used the fun setMask(pixmap->createHeuristicMask()), it is very slow
to transformation,if is other fun to transformation faster.
If I used setMask(*pixmap),the programe will break down ，and I must restart my computer .
and the programe is very use the memory,how can I don't new the pixmap all the time.
If someone can help me.
the code is here:

void Ruler::paintEvent(QPaintEvent *)
{
    setWindowOpacity(transparency);    //设置透明度
	brush->setStyle(Qt::SolidPattern) ;
	brush->setColor(Qt::lightGray) ;
	pixmap = new QPixmap(m_fwidth,m_fheight);
	painter = new QPainter(pixmap) ;
 
	painter->setRenderHint(QPainter::Antialiasing);
 
	painter->translate(m_xcenter,m_ycenter);
 
	painter->rotate(m_rotation) ;
	painter->fillRect(-10,0,frulerw,frulerh,*brush) ;
 
 
	painter->setPen(Qt::black) ;
	//painter.setPen(Qt::SolidLine);
	painter->drawRect(-10,0,frulerw,frulerh) ;
 
	painter->setPen(Qt::black) ;
 
	setPalette(*palette);
	setMask(pixmap->createHeuristicMask(false));
 
	delete painter ;
 
}

void Ruler::paintEvent(QPaintEvent *)
{
    setWindowOpacity(transparency);    //设置透明度
	brush->setStyle(Qt::SolidPattern) ;
	brush->setColor(Qt::lightGray) ;
	pixmap = new QPixmap(m_fwidth,m_fheight);
	painter = new QPainter(pixmap) ;
	
	painter->setRenderHint(QPainter::Antialiasing);

	painter->translate(m_xcenter,m_ycenter);
	
	painter->rotate(m_rotation) ;
	painter->fillRect(-10,0,frulerw,frulerh,*brush) ;
	
	
	painter->setPen(Qt::black) ;
	//painter.setPen(Qt::SolidLine);
	painter->drawRect(-10,0,frulerw,frulerh) ;
    
	painter->setPen(Qt::black) ;

	setPalette(*palette);
	setMask(pixmap->createHeuristicMask(false));

	delete painter ;

}

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[duduqq]

Can you help me!!!!
Or if my bad english you cann't understand what I said ?
This program made me could not do other thing.

[duduqq]

help !!!!!

[duduqq]

help again!!!

[duduqq]

In my programe I used the fun setMask(pixmap->createHeuristicMask()), it is very slow
to transformation,if is other fun to transformation faster.
If I used setMask(*pixmap),the programe will break down ，and I must restart my computer .
and the programe is very use the memory,how can I don't new the pixmap all the time.
If someone can help me.
the code is here:

void Ruler::paintEvent(QPaintEvent *)
{
    setWindowOpacity(transparency);    //设置透明度
	brush->setStyle(Qt::SolidPattern) ;
	brush->setColor(Qt::lightGray) ;
	pixmap = new QPixmap(m_fwidth,m_fheight);
	painter = new QPainter(pixmap) ;
 
	painter->setRenderHint(QPainter::Antialiasing);
 
	painter->translate(m_xcenter,m_ycenter);
 
	painter->rotate(m_rotation) ;
	painter->fillRect(-10,0,frulerw,frulerh,*brush) ;
 
 
	painter->setPen(Qt::black) ;
	//painter.setPen(Qt::SolidLine);
	painter->drawRect(-10,0,frulerw,frulerh) ;
 
	painter->setPen(Qt::black) ;
 
	setPalette(*palette);
	setMask(pixmap->createHeuristicMask(false));
 
	delete painter ;
 
}

void Ruler::paintEvent(QPaintEvent *)
{
    setWindowOpacity(transparency);    //设置透明度
	brush->setStyle(Qt::SolidPattern) ;
	brush->setColor(Qt::lightGray) ;
	pixmap = new QPixmap(m_fwidth,m_fheight);
	painter = new QPainter(pixmap) ;
	
	painter->setRenderHint(QPainter::Antialiasing);

	painter->translate(m_xcenter,m_ycenter);
	
	painter->rotate(m_rotation) ;
	painter->fillRect(-10,0,frulerw,frulerh,*brush) ;
	
	
	painter->setPen(Qt::black) ;
	//painter.setPen(Qt::SolidLine);
	painter->drawRect(-10,0,frulerw,frulerh) ;
    
	painter->setPen(Qt::black) ;

	setPalette(*palette);
	setMask(pixmap->createHeuristicMask(false));

	delete painter ;

}

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