using namespace std;

typedef struct bitmapFileHeader{
   unsigned short int bfType;                
   unsigned int bfSize;                      
   unsigned short int bfReserved1, bfReserved2;
   unsigned int bfOffBits;                    
} BITMAPFILEHEADER;

typedef struct bitmapInfoHeader{
   unsigned int biSize;              
   int biWidth, biHeight;                
   unsigned short int biPlanes;      
   unsigned short int biBitCount;        
   unsigned int biCompression;        
   unsigned int biSizeImage;        
   int biXPelsPerMeter, biYPelsPerMeter;    
   unsigned int biClrUsed;          
   unsigned int biClrImportant;  
} BITMAPINFOHEADER;

typedef struct colourIndex{
   unsigned char r,g,b,junk;
} COLOURINDEX;


unsigned char *LoadBitmapFile(char *argv[], BITMAPINFOHEADER *bitmapInfoHeader)
{
FILE *file1;
BITMAPFILEHEADER bitmapFileHeader;
unsigned char *bitmapImage;
int imageIdx=0;
unsigned char tempRGB;


file1 = fopen(argv[1], "rb");
if (file1 == NULL)
return NULL;


fread(&bitmapFileHeader, sizeof(BITMAPFILEHEADER), 1, file1);


if (bitmapFileHeader.bfType !=0x4D42)
{
fclose(file1);
return NULL;
}

fread(bitmapInfoHeader, sizeof(BITMAPINFOHEADER),1,file1);


fseek(file1, bitmapFileHeader.bfOffBits, SEEK_SET);


bitmapImage = (unsigned char*)malloc(bitmapInfoHeader->biSizeImage);


if (!bitmapImage)
{
free(bitmapImage);
fclose(file1);
return NULL;
}


fread(bitmapImage,bitmapInfoHeader->biSizeImage,1,file1);


if (bitmapImage == NULL)
{
fclose(file1);
return NULL;
}


fclose(file1);
return bitmapImage;


}

typedef struct bitmapFileHeader
{
   unsigned short int bfType;  // I think 0x4d42 goes here (otherwise known as the string 'BM')              
   unsigned int bfSize;  // put sizeof(BITMAPFILEHEADER) here                    
   unsigned short int bfReserved1, bfReserved2; // These are 0
   unsigned int bfOffBits; // Return the size of the headers. This tells whatever reader where the image data starts            
} BITMAPFILEHEADER;

typedef struct bitmapInfoHeader
{
   unsigned int biSize; // sizeof(BITMAPINFOHEADER)
   int biWidth, biHeight; // Actual dimensions of the image            
   unsigned short int biPlanes; // 1
   unsigned short int biBitCount; // 24  
   unsigned int biCompression; // = BI_RGB
   unsigned int biSizeImage; // put the actual byte size of the image here      
   int biXPelsPerMeter, biYPelsPerMeter; // Put anything here    
   unsigned int biClrUsed; // For 24-bit, ignore these    
   unsigned int biClrImportant; // Same
} BITMAPINFOHEADER;

// Fill the bitmap file header structure
    bitmapFileHeader.bfType = 0x4d42
    bitmapFileHeader.bfSize = sizeof(BITMAPFILEHEADER);
    bitmapFileHeader.bfReserved1 = 0;
    bitmapFileHeader.bfReserved2 = 0;
    bitmapFileHeader.bfOffBits = //?? not sure what goes here


    // Fill the bitmap info structure
    bitmapInfoHeader.biSize = sizeof(BITMAPINFOHEADER);
    bitmapInfoHeader.biWidth = 480;
    bitmapInfoHeader.biHeight = 480;
    bitmapInfoHeader.biPlanes = 1;
    bitmapInfoHeader.biBitCount = 16;            // 16 - bit bitmap
    bitmapInfoHeader.biCompression = BI_RGB;     //
    bitmapInfoHeader.biSizeImage = 115318;     // does this need padding?
    bitmapInfoHeader.biXPelsPerMeter = 0;
    bitmapInfoHeader.biYPelsPerMeter = 0;
    bitmapInfoHeader.biClrUsed = 0;
    bitmapInfoHeader.biClrImportant = 0;