When a uniform-colored addressable strip transitions from one color to
another, interpolate math-only against a cached start color instead of
reading each LED's current value back through the 8-bit stored byte.
The old algorithm used led.get_red()/etc. every step as the source for
the delta, which round-tripped through gamma uncorrect/correct and the
8-bit stored byte. At gamma 2.8, any pre-gamma value below ~27 rounds
to stored byte 0, so small early-transition steps produced stored 0 and
the next step read back 0, stalling progress until ~90% of the transition
before a single step produced a large-enough pre-gamma value to clear
the gamma threshold. Result: dark for the first 9s of a 10s fade, then
jump on in the final 1s.
Detect uniform start state in start() and take a cheap math-only lerp
path when true, so the stored byte advances through each gamma threshold
as smoothed_progress crosses it. Falls back to the existing per-LED
read-back algorithm when the buffer is non-uniform (e.g. when
transitioning out of an addressable effect).
* Update light state when transformer has finished
* Revert writing direct to output
* Correct handling of zero-length light transformers
* Allow transformers to handle zero-length transitions, and check more boundary conditions when transitioning back to start state
* Removed log.h
* Fixed race condition between LightFlashTransformer.apply() and is_finished()
* clang-format
* Step progress from 0.0f to 1.0f at t=start_time for zero-length transforms to avoid divide-by-zero
* Migrate ESPColor to Color
* color.h constructor fix
* Updated componets to use Color
Added a using for ESPColor
* Lint fixes
* Fixed value error
* Update display components to use colorutil
* Updated to latest PR comments
* Fixed COLOR_WHITE
* Moved esp_scale to color_utils
* Rename color_utils to display_color_utils
J. Nick Koston