From 23b57b34b5b0fdea4ed2f84292b1b479f4cd1f5d Mon Sep 17 00:00:00 2001
From: tiijay <git@th-jahn.de>
Date: Tue, 4 Nov 2025 14:18:33 +0100
Subject: [PATCH] v.0.0.5 short description for __builtin_clz

---
 lib/LedMatrix/src/LedMatrix.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/LedMatrix/src/LedMatrix.cpp b/lib/LedMatrix/src/LedMatrix.cpp
index ec3ef09..7d21ed8 100644
--- a/lib/LedMatrix/src/LedMatrix.cpp
+++ b/lib/LedMatrix/src/LedMatrix.cpp
@@ -19,6 +19,16 @@ uint8_t LedMatrix::charWidth(const uint8_t *charMatrix)
         if (charMatrix[i] > max_val)
             max_val = charMatrix[i];
     }
+    // __builtin_clz liefert Anzahl der führenden Nullen (int Bereich (32 Bit))
+    // Beispiele: für max_val
+    // 0 --> 32
+    // 1 --> 31
+    // 2 --> 30
+    // 4 --> 29
+    // 8 --> 28 ... etc.
+    // Deshalb 32 - Wert
+    // bei 8 -> 32-28 = 4.Bit
+    // bei 2 -> 32-20 = 2.Bit
     return (max_val == 0) ? 0 : (32 - __builtin_clz(max_val));
 }