g.addTransform performance issues

General JUCE discussion
1

Using g.addTransform to rotate some text.

firstTransform = juce::AffineTransform().rotated(juce::degreesToRadians(3.f), backgroundTextImagebounds.getCentreX(), backgroundTextImagebounds.getCentreY());

secondTransform = juce::AffineTransform().rotated(juce::degreesToRadians(-3.f), backgroundTextImagebounds.getCentreX(), backgroundTextImagebounds.getCentreY());

Then is the paint() method I do the following(twice)…
g.saveState();
g.addTransform(firstTransform);
g.drawText(“sample text”);
g.restoreState();

And this is causing so much lag and I can’t see why. At first I thought maybe my code is broken and running the paint() method too much, but it really isn’t. I’m really confused. Any help?

2

Is that component being repeatedly repainted?

If so I’d recommend calling setBufferedToImage(true) on it - it’s almost always faster to cache a component’s graphics to an image and draw that each time it’s repainted than it is to draw text from scratch every time.

I’d also recommend using a profiler to actually see what’s taking a long time - it’s often surprising what the actual cause of poor performance is.