Cheddar basic bitmap heading

var data   = [];
var pixels = [];
var byteCount = 0;
const SIGNATURE = 0x4d42;
const HEADER_SIZE = 54;
const SIZE_OF_BITMAP_INFO_HEADER = 40;
const RESERVED01 = 0;
const RESERVED02 = 0;
const IMAGE_BYTE_OFFSET  = 40;
const BITMAP_INFO_HEADER = 40;

var width  = 16;
var height = 16;
var bitsPerPixel = 24;

var compressionType = 0;
var sizeOfImg=width * height * (bitsPerPixel/8);
var sizeOfBMP=HEADER_SIZE + sizeOfImg;
var horizontalResolutionPM = 100;
var verticalResolutionPM = 100;
var numberOfColors = 0;
var numberOfImportantColors = 0;


func reverse(a){
	var b = [];
	for(var i = 0; i < a.len; i+=1){

		b[i] = a[a.len-1-i];

	}
	return b;
};

func appendData(a){print a; data += reverse(a)};

func finalizeData(){
	var s = "";
	for(var i = 0; i < byteCount; i+=1){

		s+= @"data[i];

	}
	return s;
};

func toBytes(a,size){

	var b = [];

	byteCount += size;

	for(var i = 0; i < size; i+= 1){

		var offset = (size - i-1) * 8;

		if(i == 0){

			b[0] = a >> offset;

		}else if(i == size-1){

			b[i] = a;

			for(var j = 0; j < i; j+=1){

				var offset2 = (size - j-1) * 8;

				b[i] -= b[j] << offset2;

			}

		}else{

			b[i] = a;

			for(var j = 0; j < i; j+=1){

				var offset2 = (size - j-1) * 8;

				b[i] -= b[j] << offset2;

			}

			b[i] >>= offset;

		}

	}

	return b;

};

appendData(toBytes(SIGNATURE,2));
appendData(toBytes(sizeOfBMP,4));
appendData(toBytes(RESERVED02,2));
appendData(toBytes(RESERVED02,2));
appendData(toBytes(IMAGE_BYTE_OFFSET,4));
appendData(toBytes(40,4));
appendData(toBytes(width,4));
appendData(toBytes(height,4));
appendData(toBytes(1,2));
appendData(toBytes(bitsPerPixel,2));
appendData(toBytes(compressionType,4));
appendData(toBytes(sizeOfImg,4));
appendData(toBytes(horizontalResolutionPM,4));
appendData(toBytes(verticalResolutionPM,4));
appendData(toBytes(numberOfColors,4));
appendData(toBytes(numberOfImportantColors,4));

for(var i = 0; i < width*height; i+=1){
	appendData(toBytes(0x32CD32,bitsPerPixel/8));
}

var out = finalizeData();

var file = IO.open("Hello.bmp", "w");
file.write(out);