I made a new fork for works with Arduino Due, made changes to include "defined(SAM3X8E)" and changed some delays from 250ms to 5ms, I tested and it got some speed up to library.
You need edit .h and .cpp files where:
find
#if defined(AVR_ATmega1280) || defined(AVR_ATmega2560)
change to
#if defined(AVR_ATmega1280) || defined(AVR_ATmega2560)|| defined(SAM3X8E)
find
#if defined(MSP430_CPU)
change to
#if defined(MSP430_CPU) || defined(SAM3X8E)
All Delay_ms(XXX) where XXX Is greater then 5 changes to Delay_ms(5), look on EPD.cpp
All Delay(XXX) where XXX Is greater then 5 changes to Delay_ms(5)