problem displaying a bitmap width not divisible by 4

Hello,

I am trying to display a bitmap truecolor image with a width not divisible by 4.

Code:

#include <iostream.h> #include <stdio.h> #include<stdlib.h> class ImageBMP { public: int Height; int Width; unsigned char *Rinputimage; unsigned char *Ginputimage; unsigned char *Binputimage; unsigned char *Yimage; unsigned char *Cbimage; unsigned char *Crimage; ~ImageBMP(); void getimageinfo(FILE*); void rgb2ycbcr(); void displayycbcrimage(FILE*); }; ImageBMP::~ImageBMP() { delete[]Rinputimage; delete[]Ginputimage; delete[]Binputimage; delete[]Yimage; delete[]Cbimage; delete[]Crimage; } *************************************************** Reading the image and getting the R,G,B values *************************************************** void ImageBMP::getimageinfo(FILE* fptr) { int fpos , size,fileindex=0,len,rem; fseek(fptr,18,SEEK_SET); fpos= ftell(fptr); fread(&Width,1,4,fptr); cout<<"The Width is"<<Width<<endl; fpos = ftell(fptr); fread(&Height,1,4,fptr); cout<<"The Height is "<<Height<<endl; fseek(fptr,28,SEEK_CUR); fpos=ftell(fptr); size = Height*Width; Rinputimage = new unsigned char[size]; Ginputimage = new unsigned char[size]; Binputimage = new unsigned char[size]; while(fileindex<size) { fread((Binputimage+fileindex),1,1,fptr); fpos=ftell(fptr); fread((Ginputimage+fileindex),1,1,fptr); fread((Rinputimage+fileindex),1,1,fptr); fileindex++; } fpos=ftell(fptr); } ********************************************** Conversion to RGB to ycbcr ********************************************** void ImageBMP::rgb2ycbcr() { int size,fileindex; size = Height*Width; Yimage = new unsigned char[size]; Cbimage = new unsigned char[size]; Crimage = new unsigned char[size]; for(fileindex=0;fileindex<size;fileindex++) { Yimage[fileindex]= (0.257 *Rinputimage[fileindex]+0.504*Ginputimage[fileindex]+0.098*Binputimage[fileindex]+16); Cbimage[fileindex]= (-0.148*Rinputimage[fileindex]-0.291*Ginputimage[fileindex]+0.439*Binputimage[fileindex]+128); Crimage[fileindex]= (0.439*Rinputimage[fileindex]-0.368*Ginputimage[fileindex]-0.071*Binputimage[fileindex]+128); } } ********************************************** display the image in ycbcr format ********************************************** void ImageBMP::displayycbcrimage(FILE* fptr) { int size,fpos,rem=0,row,col,ycbcrindex,addwidth,index,componentsize,filesize; char *buffer; unsigned char ycbcr; FILE *fout = fopen("out.bmp","wb"); ; fseek(fptr,0,SEEK_SET); buffer = new char[1]; ************************************* Reading and writing the header. ************************************* for (index=0;index<54;index++) { fread(buffer,1,1,fptr); fwrite(buffer,1,1,fout); } fpos=ftell(fout); **************************** Checking for divisibility by 4. **************************** if((Width)%4!=0) { rem=4-((Width)%4); } if(rem!=0) { size=Height*Width*3+Width*rem; } else { size=Height*Width*3; } //ycbcr = new unsigned char[1]; ycbcrindex=0; componentsize=Height*Width; for (index=0;index<componentsize;index++) { ycbcr=Crimage[index]; fwrite(&ycbcr,1,1,fout); ycbcr=Cbimage[index]; fwrite(&ycbcr,1,1,fout); ycbcr=Yimage[index]; fwrite(&ycbcr,1,1,fout); } if(rem!=0) { addwidth=1; while(addwidth<=rem*Height) { ycbcr=0; fwrite(&ycbcr,1,1,fout); addwidth++; } } fpos=ftell(fout); fclose(fout); // delete[]ycbcr; } void main() { FILE *fp = fopen("D:\\images\\images\\gun.bmp","rb"); ImageBMP testimage; testimage.getimageinfo(fp); testimage.rgb2ycbcr(); testimage.displayycbcrimage(fp); fclose(fp); }

The image is displayed with scanlines. I do not know where the mistake is,can someone help me?
-swetha