Crate embedded_graphics_transform

Expand description

Add simple coordinate transforms for embedded graphics displays

This crate adds DrawTarget implementations which apply various simple transformations to coordinates as they’re being written. This allows graphics output to be rotated or mirrored to display correctly on a specific display device.

Specifically, it implements:

rotation by 90/180/270 degrees (and 0, for consistency)
mirroring
transposition

Note that these transformations can be composed if needed.

Because this is a completely generic implementation, it cannot take advantage of any hardware or driver specific specializations. In particular, DrawTarget::fill_contiguous must fall back to a generic implementation using draw_iter. (fill_solid and clear can use specialized implementations, however.)

All the transforms implement AsRef<D>/AsMut<D> to get access to the underlying display object so that its inherent functions can be called.