QPainter behaviour different depending on the pen colour

limdor

When I draw text with the painter I get really different results when is painted white or black:
"Comparison":http://postimage.org/image/ec49ubn2v/
I'm not sure if this is a bug or I don't understand properly something. Any suggestion?

This is the code that I use:
@QImage image(mWinWidth, mWinHeight, QImage::Format_ARGB32_Premultiplied);
image.fill(Qt::transparent);

QPainter painter(&image);
painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing | QPainter::SmoothPixmapTransform | QPainter::HighQualityAntialiasing);

QPen newPen = painter.pen();
//newPen.setColor(Qt::black);
newPen.setColor(Qt::white);
painter.setPen(newPen);
painter.setFont(QFont("Helvetica [Calibri]", 14, 10));

painter.drawText(mViewport, Qt::AlignTop | Qt::AlignLeft, mTopLeftText);
painter.drawText(mViewport, Qt::AlignTop | Qt::AlignHCenter, mTopMidText);
painter.drawText(mViewport, Qt::AlignTop | Qt::AlignRight, mTopRightText);
painter.drawText(mViewport, Qt::AlignCenter, mMiddleText);
painter.drawText(mViewport, Qt::AlignBottom | Qt::AlignLeft, mBottomLeftText);
painter.drawText(mViewport, Qt::AlignBottom | Qt::AlignHCenter, mBottomMidText);
painter.drawText(mViewport, Qt::AlignBottom | Qt::AlignRight, mBottomRightText);
if(mGUITexture != NULL)
{
delete mGUITexture;
}
mGUITexture = new Texture( new QImage( QGLWidget::convertToGLFormat(image) ), true );@

utcenter

Image doesn't show for me

Btw, you can simply do:

@if(mGUITexture)
{
delete mGUITexture;
}@

limdor

I've changed the image and now it's a link. I hope that you can see.
About if(mGUITexture) thanks but I will not answer because we could start "a large discussion":http://stackoverflow.com/questions/3825668/c-c-checking-for-null-pointer about what is prefered.