ขอคำปรึกษาเกี่บว เขียน ไฟล์bitmapในโค้ดนี้ค่ะ

จากโค้ดข้างนะค่ะ หนูทำการกำหนดลงสีทีละพิกเซลแบบสุ่ม
มันมีปัญหาตอนเวลาเซฟนะค่่ะ ถ้าWIDTHกับHEIGHT เท่ากันภาพที่ออกมาจะไม่มีปัญหา แต่ถ้าWIDTHกับHEIGHTไม่เท่ากัน ภาพที่เซฟออกมาพิกเซลจะแตกค่ะ ควรจะแก้ไขยังไงดี ค่ะ หรือคิดว่าตรงจุดไหนดีค่ะ ขอบคุณค่ะ
import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;


public class BMP {

private final static int BMP_CODE = 19778;//19778;
private static final String filename = "MyImage12.bmp";
private static final int WIDTH = 250;
private static final int HEIGHT = 200;
static int[][] rgbValues=new int [WIDTH][HEIGHT];




byte [] bytes;
public static void main(String[] args) {



int x = (int) (Math.random() * WIDTH);
int y =(int) (Math.random() * HEIGHT);
int r = ( int ) ( Math.random() * 256 );
int b = ( int ) ( Math.random() * 256 );
int g =( int ) ( Math.random() * 256 );
int alpha=( int ) ( Math.random() * 256 );
rgbValues[x][y]=r|g<<8|b<<16;
System.out.println("[x][y]="+x+","+y);
//System.out.println("rgb="+r+","+b+","+g);

int x_m=x;
int y_m=y;
//System.out.println("[xm1][ym1]="+x_m+","+y_m);
for(int q=1;q<100;q++){

//System.out.println("[xm1][ym1]="+l+","+x+","+y);
int nx=x-q;
int ny=y-q;
rgbValues[nx][ny]=r|g<<8|b<<16;


System.out.println(nx+","+ny);

}








new BMP().saveBMP(filename,rgbValues);

//int red, green, blue;



}



public void saveBMP(String filename, int [][] rgbValues){

try {

FileOutputStream fos = new FileOutputStream(new File(filename));



bytes = new byte[54 + 3*rgbValues.length*rgbValues[0].length + getPadding(rgbValues[0].length)*rgbValues.length];


saveFileHeader();

saveInfoHeader(rgbValues.length, rgbValues[0].length);

saveRgbQuad();

saveBitmapData(rgbValues);


fos.write(bytes);



fos.close();



} catch (FileNotFoundException e) {



} catch (IOException e) {



}



}


private void saveFileHeader() {

byte[]a=intToByteCouple(BMP_CODE);

bytes[0]=a[1];

bytes[1]=a[0];



a=intToFourBytes(bytes.length);

bytes[5]=a[0];

bytes[4]=a[1];

bytes[3]=a[2];

bytes[2]=a[3];



//data offset

bytes[10]=54;

}



private void saveInfoHeader(int height, int width) {

bytes[14]=40;



byte[]a=intToFourBytes(width);

bytes[22]=a[3];

bytes[23]=a[2];

bytes[24]=a[1];

bytes[25]=a[0];



a=intToFourBytes(height);

bytes[18]=a[3];

bytes[19]=a[2];

bytes[20]=a[1];

bytes[21]=a[0];



bytes[26]=1;



bytes[28]=24;

}



private void saveRgbQuad() {



}


private void saveBitmapData(int[][]rgbValues) {

int i;



for(i=0;i<rgbValues.length;i++){

writeLine(i, rgbValues);

}



}



private void writeLine(int row, int [][] rgbValues) {

final int offset=54;

final int rowLength=rgbValues[row].length;

final int padding = getPadding(rgbValues[0].length);

int i;



for(i=0;i<rowLength;i++){

int rgb=rgbValues[row][i];

int temp=offset + 3*(i+rowLength*row) + row*padding;



bytes[temp] = (byte) (rgb>>16);

bytes[temp +1] = (byte) (rgb>>8);

bytes[temp +2] = (byte) rgb;

}

i--;

int temp=offset + 3*(i+rowLength*row) + row*padding+3;



for(int j=0;j<padding;j++)

bytes[temp +j]=0;



}


private byte[] intToByteCouple(int x){

byte [] array = new byte[2];



array[1]=(byte) x;

array[0]=(byte) (x>>8);



return array;

}



private byte[] intToFourBytes(int x){

byte [] array = new byte[4];



array[3]=(byte) x;

array[2]=(byte) (x>>8);

array[1]=(byte) (x>>16);

array[0]=(byte) (x>>24);



return array;

}



private int getPadding(int rowLength){



int padding = (3*rowLength)%4;

if(padding!=0)

padding=4-padding;





return padding;

}



}