Adds a generic copy function, adds that functionality to the epaper display (and any other monochrome displays).
Fixes a bug in the color-depth mapping for bitmaps on monochrome screens, and in-lines the color conversion math.
Copy function does not work on the ssd1306 (monochrome OLED) display yet - the problem appears to be related to pixel drawing in different screen orientations.
Adds a generic copy function, adds that functionality to the epaper display (and any other monochrome displays). Fixes a bug in the color-depth mapping for bitmaps on monochrome screens, and in-lines the color conversion math.
Copy function does not work on the ssd1306 (monochrome OLED) display yet - the problem appears to be related to pixel drawing in different screen orientations.