I have added support for hardware scaling using the IPU. If anyone wants to try it, here is a link:https://app.box.com/s/i3qncvgfh5x5yuvnf6gr24qursjvnqt5
There is a new "Hardware Scaling" option, you can set it to 3 different values:
Off: Use the current software scalers.
Aspect: Use HW scaling and keep the original aspect ratio.
Fullscr: Use HW scaling and scale the image to fit the entire screen.
You can combine this with the rotation of vertical games.
NOTE: On some situations using HW scaling may not be the best-looking option.
you got a pull request on your github repo
EDIT: Small bug fixed, link updated. EDIT2: First fix created a new bug. fixed now, link updated.