Matrix effect speedup

Typically, more than 50% of pixels are black. This optimization avoids to fade and rewrite already black pixels.
2023-09-18 15:56:50 +02:00 · 2023-09-18 15:56:50 +02:00 · 43613e3b10
commit 43613e3b10
parent 555dd2e726
1 changed files with 1 additions and 1 deletions
--- a/wled00/FX.cpp
+++ b/wled00/FX.cpp
@ -5218,7 +5218,7 @@ uint16_t mode_2Dmatrix(void) {                  // Matrix2D. By Jeremy Williams.
          if (row < rows-1) SEGMENT.setPixelColorXY(col, row+1, spawnColor);
        } else {
          // fade other pixels
-          SEGMENT.setPixelColorXY(col, row, pix.nscale8(fade));
+          if (pix != CRGB::Black) SEGMENT.setPixelColorXY(col, row, pix.nscale8(fade)); // optimization: don't fade black pixels
        }
      }
    }