changethecolorcanvas.java

在j2me手机上显示调整图片色板

package barontools.changethecolor;

import javax.microedition.lcdui.*;
import java.util.*;
import java.io.*;
/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2007</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class ChangeTheColorCanvas extends Canvas {
  ChangeTheColorMIDlet mainMIDlet;
  Image buffer=null;
  Graphics bg=null;
  public static int SK_CONFIRM=-6;
  public static int SK_CANCEL=-7;
  public static int SCREEN_WIDTH=176;
  public static int SCREEN_HEIGHT=208;
  public static int PM_BUFFERED=0;
  public static int PM_PAINT_GRAPHICS=1;
  public static int PAINT_MODE=PM_BUFFERED;
  private Vector componentList=new Vector();
  private int PLTEPos=0;
  private int PLTELength=0;
  private int tRNSIndex=0;

  public byte[] imgData=null;
   PlatePanel platePanel;
  ImageBoxPanel ibPanel;
  ChooseFileDialog cfDialog;
  //int []colorDisp=new int[6];
  public ChangeTheColorCanvas(ChangeTheColorMIDlet ctcm) {
    mainMIDlet=ctcm;
    init();
    updateCanvas();
  }
  public int getWidth(){
    return SCREEN_WIDTH;
  }
  public int getHeight(){
    return SCREEN_HEIGHT;
  }
  private void init(){
    setFullScreenMode(true);
    if (PAINT_MODE == PM_BUFFERED) {
      buffer = Image.createImage(SCREEN_WIDTH, SCREEN_HEIGHT);
      bg = buffer.getGraphics();
      bg.setColor(PlatePanel.COLOR_WHITE);
    }
    platePanel = new PlatePanel(this);
    platePanel.setTitle("调色板");
    platePanel.setSize(getWidth(), 56);
    platePanel.yPosition=getHeight()-platePanel.getHeight()-16;
    platePanel.setShow(true);
    ibPanel = new ImageBoxPanel();
    ibPanel.setSize(getWidth(), getHeight());
    ibPanel.setShow(true);
    addComponent(ibPanel);
    addComponent(platePanel);
    String[] imgs=new String[]{"dgrass_grass.png","earth_water.png","furniture.png"};
    try{
      ByteArrayOutputStream baos=new ByteArrayOutputStream();
      DataOutputStream dos=new DataOutputStream(baos);
      InputStream is=getClass().getResourceAsStream("/res/name.txt");
     byte [] mydata;
     byte [] buffer=new byte[1024];
     int ic;
     if(is!=null){
       while((ic=is.read(buffer))>0){
         dos.write(buffer,0,ic);
       }
       mydata=baos.toByteArray();
       StringBuffer sb=new StringBuffer(new String(mydata));
       Vector v=new Vector();
       int l=sb.length(),i=0;
       while(i<sb.length()){
         if(sb.charAt(i)==0xd){
            char [] sc=new char[i];
            sb.getChars(0,i,sc,0);
            String ts=new String(sc);
            if(ts.endsWith(".png")){
              v.addElement(ts);
            }
            sb.delete(0,i+2);
            i=0;
         }
         i++;
       }
       imgs=new String[v.size()];
       v.copyInto(imgs);
     }
    }catch(Exception e){
      e.printStackTrace();
    }
    //CustomItem[] items=new CustomItem[]{new CustomItem("label","text")};//初始化
    cfDialog=new ChooseFileDialog("选择图片",imgs,this);
  }
  private void componentPaint(Graphics g){
    g.setColor(PlatePanel.COLOR_WHITE);
    g.fillRect(0,0,SCREEN_WIDTH,SCREEN_HEIGHT);
    int size=componentList.size();
    for(int i=0;i<size;i++){
      BaronComponent bc=(BaronComponent)componentList.elementAt(i);
      if(bc.isShow()){
        bc.paint(g);
      }
    }
  }
  public void addComponent(BaronComponent bComponent){
    componentList.addElement(bComponent);
  }
  protected void paint(Graphics g) {
    /**@todo Implement this javax.microedition.lcdui.Canvas abstract method*/
    if(PAINT_MODE==PM_BUFFERED&&buffer!=null){
      g.drawImage(buffer, 0, 0, 20);
    }else if(PAINT_MODE==PM_PAINT_GRAPHICS){
      componentPaint(g);
    }
  }

  public void keyPressed(int k) {
    int myk = 0;
    if (k == SK_CONFIRM || k == KEY_NUM0) {
      Display.getDisplay(mainMIDlet).setCurrent(cfDialog.fileList);
    }
    else if (k == KEY_NUM9) {
      mainMIDlet.quitApp();
    }else {
      try {
        myk = getGameAction(k);
      }
      catch (Exception e) {
        e.printStackTrace();
      }
    }
    if (myk == UP || myk == DOWN || myk == LEFT || myk == RIGHT || myk == FIRE) {
      compomentKeyAction(myk);
    }
//       switch (myk) {
//         case UP:
//           break;
//         case DOWN:
//           break;
//         case LEFT:
//           break;
//         case RIGHT:
//           break;
//         case FIRE:
//           break;
//       }
    switch (k) {
      case KEY_POUND:

        break;
      case KEY_STAR:
        platePanel.setShow(!platePanel.isShow());
        break;
      case KEY_NUM0:
        Display.getDisplay(mainMIDlet).setCurrent(cfDialog.fileList);
        break;
    }
    updateCanvas();
  }
  public void updateCanvas(){
    if(PAINT_MODE==PM_BUFFERED&&bg!=null){
      componentPaint(bg);
      repaint();
    }else if(PAINT_MODE==PM_PAINT_GRAPHICS){
      repaint();
    }
  }
  private void compomentKeyAction(int key){
    int size=componentList.size();
    for(int i=size-1;i>=0;i--){
      BaronComponent bc=(BaronComponent)componentList.elementAt(i);
      if(bc.isShow()){
        bc.keyAction(key);
        break;
      }
    }
  }
  byte[] pngFlag = new byte[]{(byte)0x89,(byte)0x50,(byte)0x4e,(byte)0x47,
  (byte)0x0d,(byte)0x0a,(byte)0x1a,(byte)0x0a};
    byte[] IHDR = null;
    byte[] PLTE = null;
    byte[] tRNS = null;
    byte[] IDAT = null;
    byte[] IEND = null;

  public void flashImageData(String imgName){
    DataInputStream din;
    try{
      din=new DataInputStream(getClass().getResourceAsStream(imgName));
      imgData = new byte[din.available()];
      din.readFully(imgData);
      din=new DataInputStream(new ByteArrayInputStream(imgData));
      din.skip(pngFlag.length);
        int index = 8;
        tRNSIndex=-1;
        while(index<imgData.length){
          int byteLen = din.readInt();//数据块数据的长度
          index+=4;
          byte[] dataName = new byte[4];
          din.readFully(dataName);//数据块名
          index+=4;
          if (dataName[0] == 0x49 && dataName[1] == 0x48 &&
              dataName[2] == 0x44 && dataName[3] == 0x52) { //IHDR块
            IHDR = new byte[byteLen + 12];
            System.arraycopy(imgData,index-8,IHDR,0,IHDR.length);
          }
          else if (dataName[0] == 0x50 && dataName[1] == 0x4C &&
                   dataName[2] == 0x54 && dataName[3] == 0x45) { //PLTE块
            PLTE = new byte[byteLen + 12];
            System.arraycopy(imgData,index-8,PLTE,0,PLTE.length);

            PLTEPos=index-8;
            PLTELength=byteLen+12;
            ColorBox[] cb=new ColorBox[byteLen/3];
           for(int i=0;i<byteLen/3;i++){
             int tcolor=((PLTE[8+i*3]&0xff)<<16)|((PLTE[8+i*3+1]&0xff)<<8)|((PLTE[8+i*3+2]&0xff));
             cb[i]=new ColorBox(tcolor);
           }
           platePanel.setColors(cb);

          }
          else if (dataName[0] == 0x74 && dataName[1] == 0x52 &&
                   dataName[2] == 0x4E && dataName[3] == 0x53) { //tRNS块
            tRNS = new byte[byteLen + 12];
            System.arraycopy(imgData,index-8,tRNS,0,tRNS.length);
            for(int i=8;i<byteLen+8;i++){
              if(tRNS[i]==0){
                tRNSIndex=i-8;
                break;
              }
            }
          }
          else if (dataName[0] == 0x49 && dataName[1] == 0x44 &&
                   dataName[2] == 0x41 && dataName[3] == 0x54) { //IDAT块
            IDAT = new byte[byteLen + 12];
            System.arraycopy(imgData,index-8,IDAT,0,IDAT.length);
          }
          else if (dataName[0] == 0x49 && dataName[1] == 0x45 &&
                   dataName[2] == 0x4E && dataName[3] == 0x44) { //IEND块
            IEND = new byte[byteLen + 12];
            System.arraycopy(imgData,index-8,IEND,0,IEND.length);
          }
          din.skip(byteLen+4);
          index+=(byteLen+4);
        }
        din.close();
        if(tRNSIndex>=0){
          platePanel.setColorAt(tRNSIndex, PlatePanel.COLOR_TRANS);
        }
        ibPanel.setImage(Image.createImage(imgData,0,imgData.length));
    }catch(Exception e){
      e.printStackTrace();
    }

  }
  public static byte[] intToBytes(int intValue)
   {
     long i = (intValue & 0xFFFFFFFFL);
     byte[] b = new byte[4];
     b[0] = (byte)((i & 0xFF000000L) >> 24);
     b[1] = (byte)((i & 0x00FF0000L) >> 16);
     b[2] = (byte)((i & 0x0000FF00L) >> 8);
     b[3] = (byte)(i & 0x000000FFL);
     return b;
   }
   public static int bytesToInt(byte [] d){
     return ((d[0] & 0xFF) << 24) | ((d[1] & 0xFF) << 16 ) |
       ((d[2] & 0xFF) << 8) | (d[3] & 0xFF);
   }
   public static int bytesToInt(byte [] d,int index){
     return ((d[index] & 0xFF) << 24) | ((d[index+1] & 0xFF) << 16 ) |
       ((d[index+2] & 0xFF) << 8) | (d[index+3] & 0xFF);
   }

  /**
   * ImageChangedAction
   *
   * @param ibp ImageBoxPanel
   */
  public void ImageChangedAction(ImageBoxPanel ibp) {
    //byte[] plte=flashImageData()
  }

  public void changeTheColor(int colorNeedChangePos,int colorValue){
    int colorNum=(PLTELength-12)/3;
    if(colorNum<colorNeedChangePos){
      System.out.println("you got a fucking damned color position("+colorNeedChangePos+") to change ,but we just have "+colorNum+" colors.Use your brain not ass to think.");
      return ;
    }
    byte [] rgbColor=intToBytes(colorValue);
    System.arraycopy(rgbColor,1,imgData,PLTEPos+8+colorNeedChangePos*3,3);
    int crcValue = CRCUtil.checksum(imgData,PLTEPos+4,colorNum*3+4);
    imgData[PLTEPos+8 + colorNum * 3 + 0] = (byte) ( (crcValue >> 24) & 0xff);
    imgData[PLTEPos+8 + colorNum * 3 + 1] = (byte) ( (crcValue >> 16) & 0xff);
    imgData[PLTEPos+8 + colorNum * 3 + 2] = (byte) ( (crcValue >> 8) & 0xff);
    imgData[PLTEPos+8 + colorNum * 3 + 3] = (byte) ( (crcValue) & 0xff);
    try{
      Image img=Image.createImage(imgData,0,imgData.length);
      ibPanel.setImage(img);
    }catch(Exception e){
      e.printStackTrace();
    }
  }

  /**
    * 改变调色板
    * @param PLTE byte[] 基础调色板的数据
    * @param COLOR byte[][][] 色表
    * @param cIndex int 换成第集中颜色
    * @return byte[]
    */
   private static byte[] changeRGB(byte[] PLTE,byte[][][] COLOR,int cIndex){
     byte[] newPLTE = new byte[PLTE.length];
     System.arraycopy(PLTE,0,newPLTE,0,newPLTE.length);
     int colorNum = (newPLTE.length-12)/3;//当前调色板的颜色
     for(int i=0;i<colorNum;i++){
       for(int j=0;j<COLOR[0].length;j++){
         if(newPLTE[8+i*3+0] == COLOR[0][j][0] &&
            newPLTE[8+i*3+1] == COLOR[0][j][1] &&
            newPLTE[8+i*3+2] == COLOR[0][j][2]){
           newPLTE[8+i*3+0] = COLOR[cIndex][j][0];
           newPLTE[8+i*3+1] = COLOR[cIndex][j][1];
           newPLTE[8+i*3+2] = COLOR[cIndex][j][2];
         }
       }
     }
     //CRC校验一下
     int crcValue = CRCUtil.checksum(newPLTE,4,colorNum*3+4);
     newPLTE[8+colorNum*3+0] = (byte) ((crcValue >> 24) & 0xff);
     newPLTE[8+colorNum*3+1] = (byte) ((crcValue >> 16) & 0xff);
     newPLTE[8+colorNum*3+2] = (byte) ((crcValue >> 8) & 0xff);
     newPLTE[8+colorNum*3+3] = (byte) ((crcValue) & 0xff);
     return newPLTE;
   }
}