Drawing antialiased text on Windows very slow

[wysota]

Try this (You may have to adjust the font name). Is it very unacceptable?

[Rawk]

Your example works fine, but it draws only one word. Just change the source a little bit to draw a little bit more and you'll see the difference.
I've made the font a little bit smaller and replaced

path.addText(0, 96, fnt, txt);

path.addText(0, 96, fnt, txt);

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with

QStringList lines = txt.split("\n");
QFontMetrics fontMetrics(fnt);
int lineHeight = fontMetrics.height();
int y = 0;
foreach(QString line, lines)
{
    path.addText(0, y, fnt, line);
    y += lineHeight;
}

QStringList lines = txt.split("\n");
QFontMetrics fontMetrics(fnt);
int lineHeight = fontMetrics.height();
int y = 0;
foreach(QString line, lines)
{
    path.addText(0, y, fnt, line);
    y += lineHeight;
}

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Use a static color for the brush (otherwise the difference is not so big...). Then let the program draw 6 or more lines of text on Linux and on Windows. On Windows it needs a few seconds. Because my application often has to draw outlined text, I need some faster solution although it is drawn once on a QPixmap. Thanks for trying to help even though I still have no solution.

[wysota]

I still think you shouldn't use a painter path at all. It's just unreliable for objects where you can't estimate their complexity upfront. And if you do insist on using it - do it once and try to keep the number of nodes in it as small as possible.

[Rawk]

I don't care whether I use a painter path or not. I just need to draw outlined text in an acceptable time.