Now it renders text using pango/cairo, but only one line, so it's
limited to 9-12 characters. Example usage:

i4oled -s --text "Ctrl-Shift Y" --output C-S-Y.png ; i4oled -s --image 
C-S-Y.png -d /sys/bus/usb/drivers/wacom/1-1.2\:1.0/wacom_led/button0_rawimg

Rendering text directly to the tablet is not implemented yet.

Example icons on Intuos4 Wireless: 
http://blog.firszt.eu/public/pango_rendered_text_on_intuos4.jpg 

It's a hi-res poor quality photo ;-) , so click after loading to see the 
pixel-level details.

Please test, report successes & failures.

Road map: 
- make render directly to device,
- make 2 line render with automatic line breaking.

Regards,
Przemo Firszt


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