encoder.java

WAP ide 代码

package wbmp;

import java.io.*;

/**
 * Encodes and saves a WBMP file.
 * Copyright (c) 2003
 * @author Mark Busman
 * @version 1.0
 *
 * For License and contact information see WBMPEditor.java
 */

public class Encoder {

  private int theMatrix[][];

  /** Constructor - constructs a new Encoder object.  Converts the 2D ColorMatrix
  into a 1D hexadecimal stream.
  @param int Width
  @param int Height
  @param int[][] ColorMatrix
  @param String fileName
  */
  public Encoder(int width, int height, int matrix[][], String fName) {

    int bytes = width / 8;  // bytes to a line
    int rem = width % 8;    // remainder from devision

    // Determine how many bytes to a line
    if (width < 8)
      bytes = 1;
    else {
      if (rem > 0)
        bytes++;
    }

    // Create the final matrix and initialize it to 0
    theMatrix = new int[bytes * 8][height];
    for (int h = 0; h < height; h++) {
      for (int w = 0; w < bytes * 8; w ++) {
        theMatrix[w][h] = 0; //populate matrix with appropriate value
      }
    }

    // copy the old values from the original matrix into the final matrix
    for (int h = 0; h < height; h++) {
      for (int w = 0; w < width; w ++) {
        theMatrix[w][h] = matrix[w][h];
      }
    }

    // Create the output stream, in integers
    int index = 0;
    int byteArray[] = new int[bytes * height];
    for (int h = 0; h < height; h++) {
      for (int b = 0; b < bytes; b++) {
        int value = 256;
        int sum = 0;
          for (int w = b * 8; w < 8 * b + 8; w++) {
            value = value / 2;
            if (theMatrix[w][h] == 1)
              sum = sum + value;
          }
      byteArray[index] = sum;
      index++;
      }
    }
    WriteFile(fName, byteArray, width, height, bytes * height);
  }

  /** Writes the WBMP file to disk.
  @param String fileName
  @param int[] Data
  @param int Width
  @param int Height
  @param int DataSize.
  */
  private void WriteFile(String fileName, int data[], int width, int height, int ArraySize) {
    FileOutputStream fos = null;

    try {
      FileOutputStream DataOut = new FileOutputStream(fileName);
      // write the initialization
      DataOut.write(0);
      DataOut.write(0);
      DataOut.write(width);
      DataOut.write(height);

      // write the data
      for (int c = 0; c < ArraySize; c++)
        DataOut.write(data[c]);
      DataOut.close();
    }
    catch (IOException e) {
    }
  }

}