#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#pragma pack(1)


typedef struct
{
    char signature[2];
    unsigned int fileSize;
    unsigned int reserved;
    unsigned int offset;
    unsigned int headerSize;
    unsigned int width;
    unsigned int height;
    unsigned short planeCount;
    unsigned short bitDepth;
    unsigned int compression;
    unsigned int compressedImageSize;
    unsigned int horizontalResolution;
    unsigned int verticalResolution;
    unsigned int numColors;
    unsigned int importantColors;

} BmpHeader;

typedef struct
{
    unsigned char blue;
    unsigned char green;
    unsigned char red;
    //unsigned char reserved; Removed for convenience in fread; info.bitDepth/8 doesn't seem to work for some reason
} Rgb;


int main( int argc, char **argv,unsigned char *rgb ) {

        FILE *inFile;
		long bytesPerLine,i,k,ipos;
        BmpHeader header;
        Rgb *palette;
		 unsigned char *line;
        
        

        inFile = fopen( "aa.bmp", "rb" );
        if( !inFile ) {
                printf( "Error opening file %s.\n", argv[1] );
            return -1;
        }

        if( fread(&header, 1, sizeof(BmpHeader), inFile) != sizeof(BmpHeader) ) {
                printf( "Error reading bmp header.\n" );
            return -1;
        }
		 bytesPerLine = (3 * (header.width + 1) / 4) * 4;

     
       
     
	FILE *outFile = fopen( "bb.bmp", "wb" );
        if( !outFile ) {
                printf( "Error opening outputfile.\n" );
                return -1;
        }

    fwrite(&header.signature, 2, 1, outFile);
    fwrite(&header.fileSize, 4, 1, outFile);
    fwrite(&header.reserved, 4, 1, outFile);
    fwrite(&header.offset, 4, 1, outFile);
    fwrite(&header.headerSize, 4, 1, outFile);
    fwrite(&header.width, 4, 1, outFile);
    fwrite(&header.height, 4, 1, outFile);
    fwrite(&header.planeCount, 2, 1, outFile);
    fwrite(&header.bitDepth, 2, 1, outFile);
    fwrite(&header.compression, 4, 1, outFile);
    fwrite(&header.compressedImageSize, 4, 1, outFile);
    fwrite(&header.horizontalResolution, 4, 1, outFile);
    fwrite(&header.verticalResolution, 4, 1, outFile);
    fwrite(&header.numColors, 4, 1, outFile);
    fwrite(&header.importantColors, 4, 1, outFile);
  
    line = new unsigned char[bytesPerLine];
for (i = header.height - 1; i >= 0; i--)
    {
        for (k = 0; k < header.width; k++)
        {
            ipos = 3 * (header.width * i + k);
            line[3*k] = rgb[ipos + 2];
            line[3*k+1] = rgb[ipos + 1];
            line[3*k+2] = rgb[ipos];
        }
        fwrite(line, bytesPerLine, 1, outFile);
    }
        printf( "Done.\n" );
        fclose(inFile);
        fclose(outFile);

        printf( "\nBMP-Info:\n" );
        printf( "Width x Height: %i x %i\n", header.width, header.height );
        printf( "Depth: %i\n", (int)header.bitDepth );

        return 0;

}