#include "bitmap.h"
#include <fstream>
#include <iostream>
using namespace std;

int LoadBitmap(const char * filename, char * &buffer, 
	       int &width, int &height)
{       
  ifstream fin;   // Open the file

  fin.open(filename, ios::binary);
  if (!fin.good()) {
    cout << "Could not open the file" << endl;
    return 0;
  }

  BITMAPFILEHEADERDV  bfh;            // Read the bitmap headers
  BITMAPINFOHEADERDV  bih;
  fin.read((char*)&bfh, sizeof(BITMAPFILEHEADERDV)-2);
  fin.read((char*)&bih, sizeof(BITMAPINFOHEADERDV));

  width = bih.Width;
  height = bih.Height;

  // Make sure we can use this bitmap
  if ((bfh.Type != 0x4D42) || // hexidecimal for 'BM' or BitMap
      (bih.Planes != 1) ||
      (bih.BitCount != 24) ||
      (bih.Compression != 0)) {
    cout << "Could not read bitmap" << endl;
    fin.close();
    return false;
  }

  // Read the image data into a buffer
  buffer = new char[bih.Width*bih.Height*3];

  fin.read(buffer, bih.Width*bih.Height*3);
  fin.close();

  // Swap red and blue values in the buffer
  unsigned char temp;
  for(int i = 0; i < bih.Width*bih.Height*3; i += 3) {
    temp = buffer[i];
    buffer[i] = buffer[i+2];
    buffer[i+2] = temp;
  }

  return 1;
}