add color correction

docs/dev.md

@@ -12,5 +12,6 @@ The JSON object has the following properties:
 | Key | Type | Description | Default |
 | --- | ---- | ----------- | ------- |
 | `bootsound` | string | Uses a custom melodie while booting |  |
-| `uppercase` | boolean | Print every character in uppercase | true |
-| `temp_dec_places` | int | Number of decimal places for temperature measurements | 0 |
+| `uppercase` | boolean | Print every character in uppercase | `true` |
+| `temp_dec_places` | int | Number of decimal places for temperature measurements | `0` |
+| `color_correction` | array of int | Sets the colorcorrection of the matrix | `[255,255,255]` |

src/DisplayManager.cpp

@@ -56,7 +56,11 @@ void DisplayManager_::setBrightness(uint8_t bri)
     else
     {
         matrix->setBrightness(bri);
-        // napplyGamma_video(&leds[256], 256, 2.2);
+        if (GAMMA > 0)
+        {
+            Serial.println(GAMMA);
+            napplyGamma_video(&leds[256], 256, GAMMA);
+        }
     }
 }
 
@@ -537,8 +541,12 @@ void DisplayManager_::setup()
     TJpgDec.setCallback(jpg_output);
     TJpgDec.setJpgScale(1);
 
-    FastLED.addLeds<NEOPIXEL, MATRIX_PIN>(leds, MATRIX_WIDTH * MATRIX_HEIGHT).setCorrection(OvercastSky);
+    FastLED.addLeds<NEOPIXEL, MATRIX_PIN>(leds, MATRIX_WIDTH * MATRIX_HEIGHT);
     setMatrixLayout(MATRIX_LAYOUT);
+    if (COLOR_CORRECTION)
+    {
+        FastLED.setCorrection(COLOR_CORRECTION);
+    }
     gif.setMatrix(matrix);
     ui->setAppAnimation(SLIDE_DOWN);
     ui->setTimePerApp(TIME_PER_APP);

src/Globals.cpp

@@ -2,6 +2,7 @@
 #include "Preferences.h"
 #include <WiFi.h>
 #include <ArduinoJson.h>
+
 #include <LittleFS.h>
 
 Preferences Settings;
@@ -66,6 +67,22 @@ void loadDevSettings()
             TEMP_DECIMAL_PLACES = doc["temp_dec_places"].as<int>();
         }
 
+        if (doc.containsKey("gamma"))
+        {
+            GAMMA = doc["gamma"].as<float>();
+        }
+
+        if (doc.containsKey("color_correction"))
+        {
+            auto correction = doc["color_correction"];
+            if (correction.is<JsonArray>() && correction.size() == 3)
+            {
+                uint8_t r = correction[0];
+                uint8_t g = correction[1];
+                uint8_t b = correction[2];
+                COLOR_CORRECTION.setRGB(r, g, b);
+            }
+        }
         file.close();
     }
 }
@@ -210,4 +227,6 @@ uint8_t VOLUME;
 #endif
 int MATRIX_LAYOUT;
 bool UPDATE_AVAILABLE = false;
-long RECEIVED_MESSAGES;
+long RECEIVED_MESSAGES;
+CRGB COLOR_CORRECTION;
+float GAMMA = 0;

src/Globals.h

@@ -1,6 +1,7 @@
 #ifndef GLOBALS_H
 #define GLOBALS_H
 #include <Arduino.h>
+#include <FastLED.h>
 
 extern const char *uniqueID;
 extern const char *VERSION;
@@ -76,6 +77,8 @@ extern uint8_t VOLUME;
 extern int MATRIX_LAYOUT;
 extern bool UPDATE_AVAILABLE;
 extern long RECEIVED_MESSAGES;
+extern CRGB COLOR_CORRECTION;
+extern float GAMMA;
 void loadSettings();
 void saveSettings();
 #endif // Globals_H

src/main.cpp

@@ -94,7 +94,6 @@ void setup()
 
   delay(200);
   DisplayManager.setBrightness(BRIGHTNESS);
-  DisplayManager.clearMatrix();
 }
 
 void loop()