J2ME 圖片翻轉

import Javax.microedition.lcdui.Graphics;
import Javax.microedition.lcdui.Image;

//功能：實現圖片的高效翻轉

public class ImageUtil ...{
  

     //無變化
  
    public final static int TRANS_NONE = 0;

   
    // 順時針翻轉90度
   
    public final static int TRANS_ROT90 = 5;


     //順時針翻轉180度
    
    public final static int TRANS_ROT180 = 3;


    //順時針翻轉270度

    public final static int TRANS_ROT270 = 6;
   

     // 水平鏡像翻轉
  
    public final static int TRANS_MIRROR = 2;

   //水平鏡像翻轉並順時針翻轉90度

    public final static int TRANS_MIRROR_ROT90 = 7;

  
    //水平鏡像翻轉並順時針翻轉180度
        public final static int TRANS_MIRROR_ROT180 = 1;


     //水平鏡像翻轉並順時針翻轉270度

    public final static int TRANS_MIRROR_ROT270 = 4;

   
     //@功能 實現圖片的翻轉
    //@參數 Image srcImage    原圖
int transform 翻轉方向

     //@返回值 轉換後的圖片
      public static Image transformImage(Image srcImage, int transform) ...{
        int srcW = srcImage.getWidth();
        int srcH = srcImage.getHeight();

        Image imgRet = null;
        switch (transform) ...{
        case TRANS_NONE:
            imgRet = srcImage;
            break;
        case TRANS_ROT90:
            ...{
              
                /* 原:            目標:
                 *         1234        951
                 *         5678        062
                 *         90ab        a73
                 *                     b84
                 * */
                int[] srcRGB = new int[srcW];
  
                imgRet = Image.createImage(srcH, srcW);
                Graphics g = imgRet.getGraphics();
                for (int i = 0; i < srcH; i++) ...{
                    srcImage.getRGB(srcRGB, 0, srcW, 0, i, srcW, 1);
                    g.drawRGB(srcRGB, 0, 1, srcH - i - 1, 0, 1, srcW, true);
                }
            }
            break;
        case TRANS_ROT180:
            ...{
      
                 /* 原:            目標:
                 *         1234        ba09
                 *         5678        8765
                 *         90ab        4321
                 *                   
                 * */
                int[] srcRGB = new int[srcW];
              
                imgRet = Image.createImage(srcW, srcH);
                Graphics g = imgRet.getGraphics();
                for (int i = 0; i < srcH; i++) ...{
                    srcImage.getRGB(srcRGB, 0, srcW, 0, i, srcW, 1);
                    arrayExchange(srcRGB);
                    g.drawRGB(srcRGB, 0, srcW, 0, srcH-1-i, srcW, 1, true);
                }
            }
            break;
        case TRANS_ROT270:
            ...{
                 /* 原:            目標:
                 *         1234        48b
                 *         5678        37a
                 *         90ab        260
                 *                     159
                 * */
                int[] srcRGB = new int[srcW];
              
                imgRet = Image.createImage(srcH, srcW);
                Graphics g = imgRet.getGraphics();
                for (int i = 0; i < srcH; i++) ...{
                    srcImage.getRGB(srcRGB, 0, srcW, 0, i, srcW, 1);
                    arrayExchange(srcRGB);
                    g.drawRGB(srcRGB, 0, 1, i, 0, 1, srcW, true);
                }
            }
            break;
        case TRANS_MIRROR:
            ...{
               
                 /* 原:            目標:
                 *         1234        4321
                 *         5678        8765
                 *         90ab        ba09
                 *                   
                 * */
                int[] srcRGB = new int[srcW];
              
                imgRet = Image.createImage(srcW, srcH);
                Graphics g = imgRet.getGraphics();
                for (int i = 0; i < srcH; i++) ...{
                    srcImage.getRGB(srcRGB, 0, srcW, 0, i, srcW, 1);
                    arrayExchange(srcRGB);
                    g.drawRGB(srcRGB, 0, srcW, 0, i, srcW, 1, true);
                }
            }
            break;
        case TRANS_MIRROR_ROT90:
            ...{
              
                 /* 原:            目標:
                 *         1234        b84
                 *         5678        a73
                 *         90ab        062
                 *                     951
                 * */
                int[] srcRGB = new int[srcW];
              
                imgRet = Image.createImage(srcH, srcW);
                Graphics g = imgRet.getGraphics();
                for (int i = 0; i < srcH; i++) ...{
                    srcImage.getRGB(srcRGB, 0, srcW, 0, i, srcW, 1);
                    arrayExchange(srcRGB);
                    g.drawRGB(srcRGB, 0, 1, srcH - i - 1, 0, 1, srcW, true);
                }
            }
            break;
        case TRANS_MIRROR_ROT180:
            ...{
             
                 /* 原:            目標:
                 *         1234        90ab
                 *         5678        5678
                 *         90ab        1234
                 *                   
                 * */
                int[] srcRGB = new int[srcW];
              
                imgRet = Image.createImage(srcW, srcH);
                Graphics g = imgRet.getGraphics();
                for (int i = 0; i < srcH; i++) ...{
                    srcImage.getRGB(srcRGB, 0, srcW, 0, i, srcW, 1);
                    g.drawRGB(srcRGB, 0, srcW, 0, srcH-1-i, srcW, 1, true);
                }
            }
            break;
        case TRANS_MIRROR_ROT270:
            ...{
               
                 /* 原:            目標:
                 *         1234        159
                 *         5678        260
                 *         90ab        37a
                 *                     48b
                 * */
                int[] srcRGB = new int[srcW];
              
                imgRet = Image.createImage(srcH, srcW);
                Graphics g = imgRet.getGraphics();
                for (int i = 0; i < srcH; i++) ...{
                    srcImage.getRGB(srcRGB, 0, srcW, 0, i, srcW, 1);
                    g.drawRGB(srcRGB, 0, 1, i, 0, 1, srcW, true);
                }
            }
            break;
        default:
            imgRet = srcImage;
            break;
        }
        return imgRet;
    }


     //@功能 翻轉一個INT數組
     //@參數 要轉換的INT數組
     // @返回值    無
     //
    public static final void arrayExchange(int[] b)...{
        int nCount = b.length;
        int nLen = nCount/2;
        nCount--;
      
        for (int i = 0; i < nLen; i++) ...{
            int nTemp = b;
            b = b[nCount-i];
            b[nCount-i] = nTemp;
        }
    }
}