From 5883617ee697b509d305fdb485a28f1f691db138 Mon Sep 17 00:00:00 2001
From: Max Prokhorov <prokhorov.max@outlook.com>
Date: Mon, 15 Jul 2019 00:22:34 +0300
Subject: [PATCH] Light: move gamma to PROGMEM

---
 code/espurna/light.ino | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/code/espurna/light.ino b/code/espurna/light.ino
index d6644138..aefbfcf9 100644
--- a/code/espurna/light.ino
+++ b/code/espurna/light.ino
@@ -70,8 +70,7 @@ const char _light_channel_desc[5][5] PROGMEM = {
 };
 
 // Gamma Correction lookup table (8 bit)
-// TODO: move to PROGMEM
-const unsigned char _light_gamma_table[] = {
+const unsigned char _light_gamma_table[] PROGMEM = {
     0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
     1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   2,   2,   2,   2,   2,   2,
     3,   3,   3,   3,   3,   3,   4,   4,   4,   4,   5,   5,   5,   5,   6,   6,
@@ -454,7 +453,7 @@ void _toCSV(char * buffer, size_t len, bool applyBrightness) {
 
 unsigned int _toPWM(unsigned long value, bool gamma, bool reverse) {
     value = constrain(value, 0, LIGHT_MAX_VALUE);
-    if (gamma) value = _light_gamma_table[value];
+    if (gamma) value = pgm_read_byte(_light_gamma_table + value);
     if (LIGHT_MAX_VALUE != LIGHT_LIMIT_PWM) value = map(value, 0, LIGHT_MAX_VALUE, 0, LIGHT_LIMIT_PWM);
     if (reverse) value = LIGHT_LIMIT_PWM - value;
     return value;