Hi,
I found a bug.
_width and _height need to be initialized properly.
That is because they are used in drawString(). Lines 4118 and 4120 in TFT_eSPI.cpp.
Also added ability to push 1bpp bitmaps to a Sprite to support rendering
images on an EPaper screen.
Floyd-Steinberg dithering and basic graphics example added as first
ePaper demo.
This is stage one of support for ePaper displays from Waveshare.
Examples for 1 bit per pixel Sprites and 2 or 3 colour ePaper displays
to follow soon.
rdts