I rewrote this thing a long time ago for a project because it was incredibly SRAM consuming and slow.
The rewritten version does not support chinese charaters and I haven't tested if it can even render images but it's definitely running fine for drawing shapes and writing Text on an Arduino Due.
In case you're intereseted to try it: GitHub - cybrox/Seeedstudio_ePaper_refactored: A small, fast version of the seeed studio ePaper library tested on the Arduino MEGA and even working on the Arduino DUE!
Might also be interesting to compare both versions to find out what makes the original so horribly slow with the Arduino Due.