using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.IO;
using System.Drawing;

namespace ImageArrayMaker
{
    class Program
    {
        static void Main(string[] args)
        {
            WriteImage("Background", "whitebkgnd.png", "background.c");
            WriteImage("Foreground", "redblueforegnd.png", "foreground.c");
            WriteBitmask("Bitmask", "bitmask.png", "bitmask.c");
            WriteImage("Results", "result.png", "result.c");
        }

        static void WriteImage(string imgName, string imgFileName, string arrayFileName)
        {
            try
            {
                byte[] ir = File.ReadAllBytes(imgFileName);
                Image i = Image.FromStream(new MemoryStream(ir));
                Bitmap bmp = new Bitmap(new Bitmap(i));
                FileStream outFs = File.Create(arrayFileName);
                StreamWriter wr = new StreamWriter(outFs);

                wr.WriteLine("// {0} image width {1} and height {2} pixels", imgName, bmp.Width, bmp.Height);
                wr.WriteLine("// Each pixel consists of an Alpha, Red, Green and Blue byte, in that order.");
                wr.WriteLine("unsigned char {0}Image[] = {{", imgName.ToLower());

                for (int row = 0; row < bmp.Height; row++)
                {
                    if (row > 0) wr.WriteLine();
                    wr.Write("  ");
                    for (int col = 0; col < bmp.Width; col++)
                    {
                        Color pixel = bmp.GetPixel(col, row);
                        if (col > 0) wr.Write(",");
                        wr.Write("0x{0},0x{1},0x{2},0x{3}", pixel.A.ToString("X2"), pixel.R.ToString("X2"), pixel.G.ToString("X2"), pixel.B.ToString("X2"));
                    }
                }
                wr.WriteLine();
                wr.WriteLine("};");

                wr.Close();
                outFs.Flush();
                outFs.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }

        static void WriteBitmask(string imgName, string imgFileName, string arrayFileName)
        {
            try
            {
                byte[] ir = File.ReadAllBytes(imgFileName);
                Image i = Image.FromStream(new MemoryStream(ir));
                Bitmap bmp = new Bitmap(new Bitmap(i));
                FileStream outFs = File.Create(arrayFileName);
                StreamWriter wr = new StreamWriter(outFs);
                byte bits = 0;

                wr.WriteLine("// {0} mask width {1} and height {2} in bits", imgName, bmp.Width, bmp.Height);
                wr.WriteLine("// Each bit is set to 1 for masked or 0 for transparant.");
                wr.WriteLine("unsigned char {0}Bits[] = {{", imgName.ToLower());

                for (int row = 0; row < bmp.Height; row++)
                {
                    int bit = 0;
                    bool firstByte = true;
                    if (row > 0) wr.WriteLine();
                    wr.Write("  ");

                    bits = 0;
                    for (int col = 0; col < bmp.Width; col++)
                    {
                        Color pixel = bmp.GetPixel(col, row);
                        if (pixel.A == 255)
                        {
                            bits = SetBit(bits, bit);   
                        }

                        if((bit = NextBit(bit)) == 0)
                        {
                            if (!firstByte) wr.Write(",");
                            wr.Write("0x{0}", bits.ToString("X2"));
                            bits = 0;  // Next byte
                            firstByte = false;
                        }
                    }

                    if (bit > 0)
                    {
                        if (!firstByte) wr.Write(",");
                        wr.Write("0x{0}", bits.ToString("X2"));
                    }
                }
                wr.WriteLine();
                wr.WriteLine("};");

                wr.Close();
                outFs.Flush();
                outFs.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }

        static byte SetBit(byte b, int bit)
        {
            return (byte)(b | (0x80 >> bit));
        }

        static int NextBit(int bit)
        {
            if (bit < 7) return bit + 1;
            else return 0;
        }
    }
}