rgblight.c: add remap feature (#5243)

* rgblight.c: add RGBLIGHT_LED_MAP support

* add code to keyboards/helix/rev2/keymaps/five_rows/config.h to test rgblight.c:RGBLIGHT_LED_MAP

* Test end. Revert "add code to keyboards/helix/rev2/keymaps/five_rows/config.h to test rgblight.c:RGBLIGHT_LED_MAP"

This reverts commit e7488d6f7338460b533d7d19a09deccb011000bf.

* update docs/feature_rgblight.md

* led_map[] move to PROGMEM

1 files changed, 16 insertions, 2 deletions

diff --git a/quantum/rgblight.c b/quantum/rgblight.c
index 119ca1b9e..3042ff11e 100644
--- a/quantum/rgblight.c
+++ b/quantum/rgblight.c
@@ -51,6 +51,10 @@ static inline int is_static_effect(uint8_t mode) {
 #define MIN(a,b) (((a)<(b))?(a):(b))
 #define MAX(a,b) (((a)>(b))?(a):(b))
 
+#ifdef RGBLIGHT_LED_MAP
+const uint8_t led_map[] PROGMEM = RGBLIGHT_LED_MAP;
+#endif
+
 #ifdef RGBLIGHT_EFFECT_STATIC_GRADIENT
 __attribute__ ((weak))
 const uint16_t RGBLED_GRADIENT_RANGES[] PROGMEM = {360, 240, 180, 120, 90};
@@ -665,10 +669,20 @@ void rgblight_sethsv_slave(uint16_t hue, uint8_t sat, uint8_t val) {
 #ifndef RGBLIGHT_CUSTOM_DRIVER
 void rgblight_set(void) {
   if (rgblight_config.enable) {
+      LED_TYPE *ledp;
+    #ifdef RGBLIGHT_LED_MAP
+      LED_TYPE led0[RGBLED_NUM];
+      for(uint8_t i = 0; i < RGBLED_NUM; i++) {
+          led0[i] = led[pgm_read_byte(&led_map[i])];
+      }
+      ledp = led0;
+    #else
+      ledp = led;
+    #endif
     #ifdef RGBW
-      ws2812_setleds_rgbw(led, RGBLED_NUM);
+      ws2812_setleds_rgbw(ledp, RGBLED_NUM);
     #else
-      ws2812_setleds(led, RGBLED_NUM);
+      ws2812_setleds(ledp, RGBLED_NUM);
     #endif
   } else {
     for (uint8_t i = 0; i < RGBLED_NUM; i++) {