From a44aa92c753013e28b01fa826608d2b1e14f6e44 Mon Sep 17 00:00:00 2001
From: Frank <91616163+softhack007@users.noreply.github.com>
Date: Fri, 9 Aug 2024 12:53:41 +0200
Subject: [PATCH] playing with Fire2012

* speedup: add functions to only blur rows or columns (50% faster)

* fire2012: tinkering with bur options. Vertical blur only when slider < 64 (faster); extra blur for  slider values >192 (bush burn)
---
 wled00/FX.cpp |  6 ++++--
 wled00/FX.h   | 10 ++++++++++
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/wled00/FX.cpp b/wled00/FX.cpp
index bffcc455..3d00dbb8 100644
--- a/wled00/FX.cpp
+++ b/wled00/FX.cpp
@@ -2148,7 +2148,7 @@ uint16_t mode_fire_2012() {
 
       // Step 4.  Map from heat cells to LED colors
       for (int j = 0; j < SEGLEN; j++) {
-        SEGMENT.setPixelColor(indexToVStrip(j, stripNr), ColorFromPalette(SEGPALETTE, min(heat[j],byte(240)), 255, NOBLEND));
+        SEGMENT.setPixelColor(indexToVStrip(j, stripNr), ColorFromPalette(SEGPALETTE, min(heat[j], byte(240)), 255, NOBLEND));
       }
     }
   };
@@ -2158,7 +2158,9 @@ uint16_t mode_fire_2012() {
 
   if (SEGMENT.is2D()) {
     uint8_t blurAmount = SEGMENT.custom2 >> 2;
-    SEGMENT.blur(blurAmount);
+    if (blurAmount > 48) blurAmount += blurAmount-48;             // extra blur when slider > 192  (bush burn)
+    if (blurAmount < 16) SEGMENT.blurCols(SEGMENT.custom2 >> 1);  // no side-burn when slider < 64 (faster)
+    else SEGMENT.blur(blurAmount);
   }
 
   if (it != SEGENV.step)
diff --git a/wled00/FX.h b/wled00/FX.h
index 387b9e55..b61cdf72 100644
--- a/wled00/FX.h
+++ b/wled00/FX.h
@@ -656,6 +656,16 @@ typedef struct Segment {
 	  uint32_t __attribute__((pure)) color_from_palette(uint_fast16_t, bool mapping, bool wrap, uint8_t mcol, uint8_t pbri = 255);
     uint32_t __attribute__((pure)) color_wheel(uint8_t pos);
 
+    // 2D Blur: shortcuts for bluring columns or rows only (50% faster than full 2D blur)
+    inline void blurCols(fract8 blur_amount, bool smear = false) { // blur all columns
+      const unsigned cols = virtualWidth();
+      for (unsigned k = 0; k < cols; k++) blurCol(k, blur_amount, smear); 
+    }
+    inline void blurRows(fract8 blur_amount, bool smear = false) { // blur all rows
+      const unsigned rows = virtualHeight();
+      for ( unsigned i = 0; i < rows; i++) blurRow(i, blur_amount, smear); 
+    }
+
     // 2D matrix
 #ifndef WLEDMM_FASTPATH
     inline uint16_t virtualWidth() const {  // WLEDMM use fast types, and make function inline