From 7e3478121242aa89e749494c190aadafe003fdc8 Mon Sep 17 00:00:00 2001
From: Frank <91616163+softhack007@users.noreply.github.com>
Date: Mon, 3 Jul 2023 19:23:57 +0200
Subject: [PATCH] ABL optimization

this optimization avoids to apply brightness two times .

NeoPixelBusLg has already applied global brightness at sPC. Due to internal working of the Lg bus, its sufficient to only post-apply scaling, and set the new (scaled) brightness for the next frame.
---
 wled00/FX_fcn.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/wled00/FX_fcn.cpp b/wled00/FX_fcn.cpp
index ba514305f8..015b364783 100644
--- a/wled00/FX_fcn.cpp
+++ b/wled00/FX_fcn.cpp
@@ -1704,12 +1704,12 @@ void WS2812FX::estimateCurrentAndLimitBri() {
     uint8_t scaleB = (scaleI > 255) ? 255 : scaleI;
     uint8_t newBri = scale8(_brightness, scaleB);
     // to keep brightness uniform, sets virtual busses too - softhack007: apply reductions immediately
-    //busses.setBrightness(newBri, (scaleB < 255)); // best for performance, but leaves some flickering
-    busses.setBrightness(newBri, true); // sub-optimal, but prevents flickering
+    if (scaleB < 255) busses.setBrightness(scaleB, true); // NPB-LG has already applied brightness, so its suffifient to post-apply scaling
+    busses.setBrightness(newBri, false);                  // set new brightness for next frame
     currentMilliamps = (powerSum0 * newBri) / puPerMilliamp;
   } else {
     currentMilliamps = powerSum / puPerMilliamp;
-    busses.setBrightness(_brightness, true); // immediate = true is needed to prevent flickering
+    busses.setBrightness(_brightness, false);            // set new brightness for next frame
   }
   currentMilliamps += MA_FOR_ESP; //add power of ESP back to estimate
   currentMilliamps += pLen; //add standby power back to estimate