c code for extraction of attributes of BMP file

/*BMP Attributes.C*/

#include<stdio.h>

#include<conio.h>

#include<string.h>

#include<graphics.h>

typedef struct bmp_header {

                                                unsigned char ft[2];

                                                unsigned long fsz;

                                                unsigned int res1, res2;

                                                unsigned long ofb, sz, wd, ht;

                                                unsigned int npi, bpp;

                                                unsigned long cps, isz, xres, yres;

                                                unsigned long clru, clrimp;

                                      }TH;

TH *ihdr;

typedef struct RGBtag {

                                    unsigned char blue, red, green, resv;

                              }RGB;

RGB clrs[256], pal[256];

char buff[18];

void main()

{

            int d= DETECT, m= VGAHI, xsize, ysize, pix, n, m1;

            long int i, j;

            FILE *imgf;

            imgf= fopen("2.bmp", "rb");

            if(imgf == NULL)

            {

                        printf("\n\a ERROR");

                        exit(0);

            }

            clrscr();

            fread(ihdr, sizeof(TH), 1, imgf);

            printf("\n\t BMP FILE HEADER\n");

            printf("\n1File Type: %c%c",ihdr->ft[0],ihdr->ft[1]);

            printf("\n2 FILE SIZE = %ld bytes", ihdr -> fsz);

            printf("\n3 RESERVED1 = %d ",ihdr -> res1);

            printf("\n4 RESERVED2= %d ", ihdr-> res2);

            printf("\n5 OFFSET TO START OF IMAGE= %ld bytes", ihdr->ofb);

            printf("\n6 SIZE OF BITMAP INFO HEADER = %ld", ihdr->sz);

            printf("\n7 IMAGE WIDTH = %ld pixels", ihdr->wd);

            printf("\n8 IMAGE HEIGHT = %ld pixels ", ihdr->ht);

            printf("\n9 no. of PLANES IN IMAGE = %d ", ihdr->npi);

            printf("\n10 no of bits/ pixels= %d ", ihdr->bpp);

            printf("\n11 TYPE OF COMPRESSION =%d", ihdr->cps);

            printf("\n12 IMAGE SIZE= %ld bytes",ihdr->isz );

            printf("\n13 HORIZONTAL RESOLUTION =%ld pixels/mtr", ihdr->xres);

            printf("\n14 VERTICAL RESOLUTION = %ld pixel/mtr", ihdr->yres);

            printf("\n15 NO of colours in image= %d", ihdr->clru);

            printf("\n16 NO fo important colors %d ", ihdr->clrimp);

            printf("\n RGB Values of a perticular pixel : \n\n");

            printf("Row ?= ");

            scanf("%d",&n);

            printf("Column ?= ");

            scanf("%d", &m1);

            printf("\n ROW %d \n ",n);

            printf("\n col. %d ", m1);

            fseek(imgf, (n*sizeof(clrs))+(m1*sizeof(clrs)), SEEK_SET);

            printf("\n R G B Resv. \n");

            fread(&clrs, sizeof(clrs), 1, imgf);

            printf("\n %d %d %d", clrs->blue, clrs-> green , clrs->resv);

            getch();

}                         

OUTPUT:

BMP FILE HEADER

1File Type: BM

2 FILE SIZE = 25870 bytes

3 RESERVED1 = 0

4 RESERVED2= 0

5 OFFSET TO START OF IMAGE= 118 bytes

6 SIZE OF BITMAP INFO HEADER = 40

7 IMAGE WIDTH = 228 pixels

8 IMAGE HEIGHT = 222 pixels

9 no. of PLANES IN IMAGE = 1

10 no of bits/ pixels= 4

11 TYPE OF COMPRESSION =0

12 IMAGE SIZE= 25752 bytes

13 HORIZONTAL RESOLUTION =0 pixels/mtr

14 VERTICAL RESOLUTION = 0 pixel/mtr

15 NO of colours in image= 0

16 NO fo important colors 0

 RGB Values of a perticular pixel :

Row ?= 2

Column ?=3

 ROW 2

 col. 3

 R G B Resv.

 136 135 119

     Original Image (C:\TC\2.BMP)