DPaint-like draw modes

```
The DPaint modes for painting are awesome and I think they should be 
replicated, specially COLOR, where you take a brush and paint with it all in 
one user-selected tint. The current tint mode doesn't work well as it's 
attached to transparency.
```

Original issue reported on code.google.com by `k.dron...@gmail.com` on 11 Feb 2014 at 6:16
