View source for Krita/How To Write Brush Engines

= What is brush engine = 
TODO

= How to write brush engine =

TODO

= Presets =
Backward compatibility, version is another property, look at kis_pressure_rate_option.cpp : settings->setProperty("MyAttributeVersion","3.14")

= FAQ =
* What happens if I implement both PaintAt and PaintLine in a paintop?
If you implement paintLine, paintAt will not be called.
If you look at KisPaintOp, you can see that paintAt() is called in paintLine() method.

* What should I use to debug my code? printf? clog? qDebug()?
Be wise and look at kis_debug.h, there you find some defined named outputs. You can use it like (similary to qDebug(), cout()):
''' dbgPlugins() << "Hello" << QRect() << KisPaintInformation; '''

You can turn on and off the areas of debugging (plugins ,ui, core, ...) with '''kdebugdialog''' utility in KDE