[Solved] Better Repaint Debugging

[t0m]

@jakemumu

^ how does the context here result in the same r as passed into draw rect? When I check the context clip region it’s correct.

Are you sure that both r and the context clip region are ‘correct’?

I think you’ll find that you will have previously marked multiple smaller regions as dirty in setNeedsDisplayRectangles, and it is only these regions where CoreGraphics will actually update what is showing on the screen. Both r and the context clip region will be a larger rect that encloses the smaller ones that actually get rendered.

Trying to fix JUCE_COREGRAPHICS_RENDER_WITH_MULTIPLE_PAINT_CALLS

Jules originally added the JUCE_COREGRAPHICS_RENDER_WITH_MULTIPLE_PAINT_CALLS option to work-around CoreGraphics’ inability to tell what components are not in the clip region, and for a while it worked. After more changes from Apple’s side it stopped working, with some confusing interim states where using certain build settings did work, but as for now on my 10.14.6 system no build settings I know of works and to add injury to insult it doesn’t work in a nasty way! Nasty way of not working: If…