Incorrect framebuffer width for SSD1680

[cdmuhlb]

The Adafruit_SSD1680 class increases its width parameter to the nearest multiple of 8 before constructing its framebuffers. This results in the framebuffer width not matching the display width whenever the latter is not a multiple of 8 (as is the case for the 122x250 resolution of the 2.13" E-ink Bonnet for Raspberry Pi). One consequence of this mismatch is that graphics are shifted (by 4 pixels in the case of the bonnet) when the rotation of the display is set to 1 or 2.

This was addressed for the SSD1675 and SSD1675B in 8022b34 by distinguishing between the width and stride of the framebuffer. The same fix should be ported to the SSD1680 driver.

[ladyada]

indeed!