Keys normally only change when switching layers, so instead of going through
every key in every cycle to look for modifiers, do that once, when layers
change (using the new `onLayerChange` event), and store the coordinates of keys
we consider modifiers in an array (currently limited to 16 items).
Then, when we want to highlight them, go over this array only, significantly
reducing the work we need to do. In a typical case, on a full-size keyboard, one
would have eight modifiers and a few layer keys, so instead of going through a
hundred keys, we go through sixteen at most, but usually considerably less.
This fixes#403, at the cost of noticeably higher PROGMEM and RAM use.
Signed-off-by: Gergely Nagy <algernon@keyboard.io>
LED related functions should be as close to no-op on LED-less hardware as
possible. For this reason, guard all relevant points with an early exit in the
LED-less case.
Signed-off-by: Gergely Nagy <algernon@keyboard.io>
Move the documentation to `doc/plugin/LED-ActiveModColor.md`, sources under
`src/kaleidoscope/plugin/` (appropriately namespaced). This is in preparation of
merging plugins into a single monorepo.
Signed-off-by: Gergely Nagy <algernon@keyboard.io>
Gergely Nagy