#include <SPI.h>
#include <SD.h>

#include "FastLED.h"
#define NUM_LEDS 256
#define DATA_PIN 22
CRGB leds[NUM_LEDS];

//#include "SdFat.h"
//SdFat SD;

const int chipSelect = 53;

void setup() {

  FastLED.addLeds<WS2812B, DATA_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(15);

  Serial.begin(115200);

  Serial.print("Initializing SD card...");

  if (!SD.begin(chipSelect)) {
    Serial.println("Card failed, or not present");
    return;
  }
  Serial.println("card initialized.");

delay(1000);

}

void loop() {

load_bmp("test.bmp");
delay(1000);
load_bmp("1.bmp");
delay(1000);

}



void load_bmp(String img){

  int height = 0;
  int width = 0;
  int data = 0;
  int line = 0;
  int offset = 40;
  int i = 0;


  File dataFile = SD.open(img);

  if (dataFile) {


    while (dataFile.available()) {
      line++;
      data = dataFile.read();
      if (line == 11){
        offset = data;
      }
      if ((line >= 19) && (line <= 22)){
        width = (data + width);
      }

      if(line > offset){
        leds[i].b = data;
        line++;

        data = dataFile.read();
        leds[i].g = data;
        line++;

        data = dataFile.read();
        leds[i].r = data;
        line++;

        data = dataFile.read();     // Alpha data. Bruges ikke, så her gør vi ikke noget
        i++;

        FastLED.show();
      }
    }

    i = 0;
    height = ((line - offset) / 4 ) / width;

    dataFile.close();
  }


  else {
    Serial.print("error opening ");
    Serial.println(img);
  }


}