Bitmaps can be rotated:
https://scottplot.net/cookbook/4.1/category/plottable-image/#image-rotation

It would be convenient, if beside the horizontal and vertical flips, we could also rotate the Heatmap before rendering it.
There are some questions:

1. what would be the default rotation direction? Clockwise or anti-clockwise?
2. If flip(s) and rotation are also specified, activated, what should be the natural order? Always first flip then rotate, or the other way?