Draw text on images

[arunkumaraymuo1]

I am developing a simple painting tool using Qt. For that I modified Qt's scribble code to draw text on an image. I can draw text on a normal jpgg image using the below code. But when I load big image(high resolution image), the text overlaps each other. I tried several technique but not get a perfect result

Code

QPainter painter(&image);
 
    painter.setPen(m_myPenColor);//(QPen(m_myPenColor, myPenWidth,
    painter.setBrush(QBrush(m_myPenColor));
 
    painter.setFont(m_myFont );
 
    QFontMetricsF fm(m_myFont);
    qreal pixelsHigh = fm.height();
    qreal pixelwidthMil = fm.width("First Text");
    qreal pixelwidthMm = fm.width("Second Text");
    qreal pixelWidthMax= (pixelwidthMil>=pixelwidthMm)?pixelwidthMil:pixelwidthMm;
    int iX=0,iY=0;
    iX = endPoint.x();
 
    iY = endPoint.y()+(int)pixelsHigh;
 
    painter.drawText(iX+2, iY, "First Text");
    iY = iY + (int)pixelsHigh+1;
    painter.drawText(iX+2, iY, "Second Text");
 
    pixelsHigh = (pixelsHigh*2)+6;
 
    pixelWidthMax = pixelWidthMax+6;
    update(endPoint.x()-2, endPoint.y()-2, (int)pixelWidthMax,(int)pixelsHigh);

QPainter painter(&image);
    
    painter.setPen(m_myPenColor);//(QPen(m_myPenColor, myPenWidth,
    painter.setBrush(QBrush(m_myPenColor));
    
    painter.setFont(m_myFont );
    
    QFontMetricsF fm(m_myFont);
    qreal pixelsHigh = fm.height();
    qreal pixelwidthMil = fm.width("First Text");
    qreal pixelwidthMm = fm.width("Second Text");
    qreal pixelWidthMax= (pixelwidthMil>=pixelwidthMm)?pixelwidthMil:pixelwidthMm;
    int iX=0,iY=0;
    iX = endPoint.x();
    
    iY = endPoint.y()+(int)pixelsHigh;
    
    painter.drawText(iX+2, iY, "First Text");
    iY = iY + (int)pixelsHigh+1;
    painter.drawText(iX+2, iY, "Second Text");
    
    pixelsHigh = (pixelsHigh*2)+6;
    
    pixelWidthMax = pixelWidthMax+6;
    update(endPoint.x()-2, endPoint.y()-2, (int)pixelWidthMax,(int)pixelsHigh);

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