v.0.0.4 uint8_t charWidth(const uint8_t *charMatrix);

lib/LedMatrix/src/LedMatrix.cpp

@@ -10,6 +10,18 @@ LedMatrix::~LedMatrix()
 {
 }
 
+template <size_t N>
+uint8_t LedMatrix::charWidth(const uint8_t *charMatrix)
+{
+    uint8_t max_val = 0;
+    for (size_t i = 0; i < N; i++)
+    {
+        if (charMatrix[i] > max_val)
+            max_val = charMatrix[i];
+    }
+    return (max_val == 0) ? 0 : (32 - __builtin_clz(max_val));
+}
+
 void LedMatrix::drawPixel(int x, int y, CRGB color)
 {
     if (x >= 0 && x < 64 && y >= 0 && y < 64)
@@ -21,9 +33,9 @@ void LedMatrix::drawPixel(int x, int y, CRGB color)
 
 uint8_t LedMatrix::drawChar(int x, int y, char c, CRGB color)
 {
-    u_int8_t char_width_pixel = getCharWidth(c);
-
     const uint8_t *fontData = getFontChar(c);
+    const u_int8_t char_width_pixel = charWidth<7>(fontData);
+
     for (int row = 0; row < 7; row++)
     {
         uint8_t line = fontData[row];

lib/LedMatrix/src/LedMatrix.h

@@ -19,6 +19,9 @@ private:
     uint16_t num_leds; // default 64x64 = 4096 LEDs
     vector<CRGB> leds; // Automatic memory management
 
+    template <size_t N>
+    uint8_t charWidth(const uint8_t *charMatrix);
+
 public:
     LedMatrix(uint8_t h = 64, uint8_t w = 64);