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j2me工具类ImageUtil.java

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 import javax.microedition.lcdui.*;  
 import javax.microedition.lcdui.game.Sprite;  
   
   
 public class ImageUtil  
 {  
     public static final int TURN_LEFT = 1;  
     public static final int TURN_RIGHT = 2;  
   
   
     /* 
     *获取图片RGB数据,并返回大小为width*height大小的一维数组 
     */  
     public int[] getPixels(Image src)  
     {  
         int w = src.getWidth();  
         int h = src.getHeight();  
         int[] pixels = new int[w * h];  
         src.getRGB(pixels, 0, w, 0, 0, w, h);  
         return pixels;  
     }  
   
    
     /* 
     *将pixels[]里的数据,生成一张图片,图片宽为w,高为h 
     */   
     public Image drawPixels(int[] pixels, int w, int h)  
     {  
         Image image = Image.createRGBImage(pixels, w, h, true);  
         pixels = null;  
         return image;  
     }  
   
   
     /* 
     *调整图片大小 
     *destW 调整后的宽,destH调整后的高 
     */    
     public  Image effect_resizeImage(Image src, int destW, int destH)  
     {  
         int srcW = src.getWidth();  
         int srcH = src.getHeight();  
   
     
         int[] destPixels = new int[destW * destH];   
           
         int[] srcPixels = getPixels(src);   
   
             for (int destY = 0; destY < destH; ++destY)  
             {  
                 for (int destX = 0; destX < destW; ++destX)  
                 {  
                     int srcX = (destX * srcW) / destW;  
                     int srcY = (destY * srcH) / destH;  
                     destPixels[destX + destY * destW] = srcPixels[srcX + srcY  
                             * srcW];  
                 }  
             }  
   
     
         return drawPixels(destPixels, destW, destH);  
     }  
   
      
    /* 
    * 调整图片亮度与对比度。  contrast 对比度,light 亮度 
    */  
    public Image effect_light_contrast(Image src,double contrast,int light)  
    {  
             int srcW = src.getWidth();  
             int srcH = src.getHeight();    
             int[] srcPixels = getPixels(src);  
             int r = 0;  
             int g = 0;  
             int b = 0;  
             int a = 0;  
             int argb;  
      //公式y =ax+b   a为对比度,b为亮度   
      //int para_b  = light - 127 * (light - 1);  
      for (int i = 0; i < srcH; i++)  
            {  
               for(int ii=0;ii<srcW;ii++)  
         {  
                       argb = srcPixels[i*srcW+ii];    
         a = ((argb & 0xff000000) >> 24); // alpha channel  
                       r =((argb & 0x00ff0000) >> 16); // red channel  
                       g =((argb & 0x0000ff00) >> 8); // green channel  
                       b =(argb & 0x000000ff); // blue channel  
                       r =(int)( r*contrast+light);                       
         g =(int)( g*contrast+light);  
         b =(int)( b*contrast+light);  
                        
          /*r =(int)((r -127 ) * contrast + 127+para_b); 
          g =(int)((g -127 ) * contrast + 127+para_b); 
          b =(int)((b -127 ) * contrast + 127+para_b);*/  
          if(r>255)  
                                r = 255;  
                        else if(r<0) r=0;  
                        if(g>255)  
                                g = 255;  
                        else if(g<0) g=0;  
                        if(b>255)  
                                b = 255;  
                        else if(b<0) b=0;  
                srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b);  
   
         }  
      }  
          return drawPixels(srcPixels, srcW, srcH);  
    }  
    
    
     /* 
    * 图片镜像特效 
    */  
     public Image effect_mirror(Image src)  
     {  
           int srcW = src.getWidth();  
           int srcH = src.getHeight();    
           int[] srcPixels = getPixels(src);  
           int len;  
           int temp;  
           for (int i = 0; i < srcH; i++)  
           {  
               len = (i+1)*srcW;  
               for(int ii=0;ii<srcW/2;ii++)   
               {     
                  temp=srcPixels[i*srcW+ii];   
                  srcPixels[i*srcW+ii]=srcPixels[len-1-ii];   
                  srcPixels[len-1-ii]=temp;   
               }   
            }  
            return drawPixels(srcPixels, srcW, srcH);  
     }  
   
       /* 
    * 图片剪切,cut_xpos,cut_ypos 切割框的起始位置坐标,cut_width,cut_height 切割框的宽与高 
    */  
     public Image effect_cut(Image src,int cut_xpos,int cut_ypos,int cut_width,int cut_height)  
     {  
           int srcW = src.getWidth();  
           int srcH = src.getHeight();    
           int[] srcPixels = getPixels(src);  
           int[] desPixels = new int[cut_width*cut_height];  
           int argb;  
    int num = 0;  
           for (int i = 0; i < srcH; i++)  
           {  
             if(i >= cut_ypos&&i<cut_height+cut_ypos)  
             {  
                  for(int ii=0;ii<srcW;ii++)  
           {  
                     if(ii>=cut_xpos && ii<cut_width+cut_xpos)  
       {  
                          desPixels[num] = srcPixels[i*srcW+ii];      
                          num++;  
                            
         }  
    }  
              }  
          }  
            return drawPixels(desPixels, cut_width, cut_height);  
     }  
   
   
     /* 
    * 图片叠加,将src和image合成一张图片,x_pos,y_pos一般为0,0,也可以为自定义值 
    */  
     public Image effect_image_add_image(Image src,Image image,int x_pos,int y_pos)  
     {     
              Image temp  = Image.createImage(src.getWidth(),src.getHeight());  
       Graphics g = temp.getGraphics();  
              //g.drawImage(src,x_pos,y_pos,Graphics.LEFT|Graphics.TOP);  
       //g.drawImage(image,x_pos,y_pos,Graphics.LEFT|Graphics.TOP);*/   
              int alpha = 168;  
              int []srcRgbdata   =   new   int[src.getWidth()*src.getHeight()];     
              int []desRgbdata   =   new   int[image.getWidth()*image.getHeight()];    
              src.getRGB(srcRgbdata,0,src.getWidth(),0,0,src.getWidth(),src.getHeight());     
              image.getRGB(desRgbdata,0,image.getWidth(),0,0,image.getWidth(),image.getHeight());      
              g.drawRGB(getTransImg(alpha,srcRgbdata,desRgbdata),0,src.getWidth(),0,0,src.getWidth(),src.getHeight(),false);     
              src=null;     
              image=null;    
              return temp;  
     }  
       
      /* 
    * 图片上添加字符 
    */  
     public Image effect_image_add_str(Image src,String str,int x_pos,int y_pos)  
     {   
              Image temp = Image.createImage(src.getWidth(),src.getHeight());  
       Graphics g = temp.getGraphics();  
              g.drawImage(src,0,0,Graphics.LEFT|Graphics.TOP);  
              g.setColor(0x000000);  
    g.drawString(str,x_pos,y_pos,Graphics.LEFT|Graphics.TOP);  
              return temp;  
     }  
    
      /* 
    * 图片特效负片 
    */  
     public Image effect_negative(Image src)  
     {  
          int srcW = src.getWidth();  
          int srcH = src.getHeight();    
          int[] srcPixels = getPixels(src);  
          int r = 0;  
          int g = 0;  
          int b = 0;  
          int a = 0;  
          int argb;     
          for (int i = 0; i < srcH; i++)  
          {  
               for(int ii=0;ii<srcW;ii++)  
         {  
    argb = srcPixels[i*srcW+ii];  
                         a = ((argb & 0xff000000) >> 24); // alpha channel  
                         r =255-((argb & 0x00ff0000) >> 16); // red channel  
                         g =255-((argb & 0x0000ff00) >> 8); // green channel  
                         b =255-(argb & 0x000000ff); // blue channel  
                         srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b);  
         }  
          }  
         return drawPixels(srcPixels, srcW, srcH);  
   
            
     }  
   
       /* 
    * 图片特效黑白 
    */  
      public Image effect_black_white(Image src)  
     {  
          int srcW = src.getWidth();  
          int srcH = src.getHeight();    
          int[] srcPixels = getPixels(src);  
          int r = 0;  
          int g = 0;  
          int b = 0;  
          int a = 0;  
          int argb;  
          int temp;  
             
          for (int i = 0; i < srcH; i++)  
          {  
               for(int ii=0;ii<srcW;ii++)  
         {  
    argb = srcPixels[i*srcW+ii];  
                         a = ((argb & 0xff000000) >> 24); // alpha channel  
                         r = ((argb & 0x00ff0000) >> 16); // red channel  
                         g = ((argb & 0x0000ff00) >> 8); // green channel  
                         b = (argb & 0x000000ff); // blue channel  
                         temp = (int)(.299*(double)r+.587*(double)g+.114*(double)b);  
                         r = temp;  
                         g = temp;  
                         b = temp;  
                         srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b);  
         }  
          }  
         return drawPixels(srcPixels, srcW, srcH);  
   
            
     }  
        
       /* 
    * 图片特效粉笔画 
    */  
      public Image effect_crayon(Image src)  
      {   
          int srcW = src.getWidth();  
          int srcH = src.getHeight();    
          int[] srcPixels = getPixels(src);  
          int r = 0;  
          int g = 0;  
          int b = 0;  
          int a = 0;  
          int argb;     
          int r1 = 0;  
          int g1 = 0;  
          int b1 = 0;  
          int a1 = 0;  
          int r2 = 0;  
          int g2 = 0;  
          int b2 = 0;  
          int a2 = 0;  
            
          for (int i = 0; i < srcH; i++)  
          {  
               for(int ii=0;ii<srcW;ii++)  
        {  
                   argb = srcPixels[i*srcW+ii];  
                   a = ((argb & 0xff000000) >> 24); // alpha channel  
                   r = ((argb & 0x00ff0000) >> 16); // red channel  
                   g = ((argb & 0x0000ff00) >> 8); // green channel  
                   b = (argb & 0x000000ff); // blue channel   
                   if(i+1 == srcH)  
                   {  
                        r1= 0;  
                        g1= 0;  
                        b1=0;  
                   }  
                   else  
                   {  
                      argb = srcPixels[(i+1)*srcW+ii];   
                      //a1 = ((argb & 0xff000000) >> 24); // alpha channel  
                      r1 = ((argb & 0x00ff0000) >> 16); // red channel  
                      g1 = ((argb & 0x0000ff00) >> 8); // green channel  
                      b1 = (argb & 0x000000ff); // blue channel   
                   }  
                   if(ii+1 == srcW){  
                        r2= 0;  
                        g2= 0;  
                        b2=0;  
                   }  
                   else  
                   {  
                       argb = srcPixels[i*srcW+ii+1];   
                       r2 = ((argb & 0x00ff0000) >> 16); // red channel  
                       g2 = ((argb & 0x0000ff00) >> 8); // green channel  
                       b2 = (argb & 0x000000ff); // blue channel  
                   }  
                  // rr1=(r1-r2)^2  rr2=(r1-r3)^2  
                   r = (int)Math.sqrt((double)(2*(r-r1)*(r-r1)+(r-r2)*(r-r2)));  
                   g = (int)Math.sqrt((double)(2*(g-g1)*(g-g1)+(g-g2)*(g-g2)));  
                   b = (int)Math.sqrt((double)(2*(b-b1)*(b-b1)+(b-b2)*(b-b2)));  
                   r =255-r; // red channel  
                   g =255-g; // green channel  
                   b =255-b; // blue channel  
                   srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b);  
               }  
          }  
          return drawPixels(srcPixels, srcW, srcH);  
      }  
        
          /* 
    * 图片特效蒙版 
    */  
       public Image effect_hoodwink(Image src)  
     {  
          int srcW = src.getWidth();  
          int srcH = src.getHeight();    
          int[] srcPixels = getPixels(src);  
          int r = 0;  
          int g = 0;  
          int b = 0;  
          int a = 0;  
          int argb;  
   
             
          for (int i = 0; i < srcH; i++)  
          {  
               for(int ii=0;ii<srcW;ii++)  
         {  
    argb = srcPixels[i*srcW+ii];  
                         a = ((argb & 0xff000000) >> 24); // alpha channel  
                         r = ((argb & 0x00ff0000) >> 16); // red channel  
                         g = ((argb & 0x0000ff00) >> 8); // green channel  
                         b = (argb & 0x000000ff); // blue channel  
                         r = (int)(.299*(double)r);  
                         g = (int)(.587*(double)g);  
                         b = (int)(.114*(double)b);  
                         srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b);  
         }  
          }  
         return drawPixels(srcPixels, srcW, srcH);  
   
            
     }  
        
     private   int[]   getTransImg(int alpha,int[] srcRgbdata,int[] desRgbdata)     
     {      
            int []   tempRgbData = new int[desRgbdata.length];     
           
            int   sr  ;  
            int   sg ;  
            int   sb ;  
            int   dr  ;    
            int   dg ;  
            int   db ;   
            int   tr  ;  
            int   tg  ;  
            int   tb  ;  
            for(int   i=0;i<desRgbdata.length;i++)     
            {     
               sr   =   (srcRgbdata[i]&0xff0000)>>16;     
               sg   =   (srcRgbdata[i]&0xff00)>>8;     
               sb   =   srcRgbdata[i]&0xff;     
               dr   =   (desRgbdata[i]&0xff0000)>>16;     
               dg   =   (desRgbdata[i]&0xff00)>>8;     
               db   =   desRgbdata[i]&0xff;     
               tr   =   (sr*alpha   +   dr*(255-alpha))/255;     
               tg   =   (sg*alpha   +   dg*(255-alpha))/255;     
               tb   =   (sb*alpha   +   db*(255-alpha))/255;       
               tempRgbData[i]   =   (tr<<16)|(tg<<8)|tb;     
            }     
          return   tempRgbData;     
        }   
       
          /* 
    * 图片特旋转 
    */  
     public Image effect_rotate(Image src,int direction)   
     {   
         Sprite sprite = new Sprite(src);  
         switch(direction)  
         {  
                   case 1:  
                             sprite.setTransform(sprite.TRANS_ROT270);  
                             break;  
                   case 2:  
                             sprite.setTransform(sprite.TRANS_ROT90);     
                             break;  
         }  
          
         Image temp = Image.createImage(src.getHeight(),src.getWidth());  
   Graphics g = temp.getGraphics();  
         sprite.setPosition(0,0);  
         sprite.paint(g);  
         return temp;     
      }   
   
       
      
   
        /* 
    * 图片特霓虹灯 
    */  
     public Image effect_neonLight(Image src)  
     {  
          int srcW = src.getWidth();  
          int srcH = src.getHeight();    
          int[] srcPixels = getPixels(src);  
          int r = 0;  
          int g = 0;  
          int b = 0;  
          int a = 0;  
          int argb;     
          int r1 = 0;  
          int g1 = 0;  
          int b1 = 0;  
          int a1 = 0;  
          int r2 = 0;  
          int g2 = 0;  
          int b2 = 0;  
          int a2 = 0;  
            
          for (int i = 0; i < srcH; i++)  
          {  
               for(int ii=0;ii<srcW;ii++)  
        {  
                   argb = srcPixels[i*srcW+ii];  
                   a = ((argb & 0xff000000) >> 24); // alpha channel  
                   r = ((argb & 0x00ff0000) >> 16); // red channel  
                   g = ((argb & 0x0000ff00) >> 8); // green channel  
                   b = (argb & 0x000000ff); // blue channel   
                   if(i+1 == srcH)  
                   {  
                        r1= 0;  
                        g1= 0;  
                        b1=0;  
                   }  
                   else  
                   {  
                      argb = srcPixels[(i+1)*srcW+ii];   
                      //a1 = ((argb & 0xff000000) >> 24); // alpha channel  
                      r1 = ((argb & 0x00ff0000) >> 16); // red channel  
                      g1 = ((argb & 0x0000ff00) >> 8); // green channel  
                      b1 = (argb & 0x000000ff); // blue channel   
                   }  
                   if(ii+1 == srcW){  
                        r2= 0;  
                        g2= 0;  
                        b2=0;  
                   }  
                   else  
                   {  
                       argb = srcPixels[i*srcW+ii+1];   
                       r2 = ((argb & 0x00ff0000) >> 16); // red channel  
                       g2 = ((argb & 0x0000ff00) >> 8); // green channel  
                       b2 = (argb & 0x000000ff); // blue channel  
                   }  
                  // rr1=(r1-r2)^2  rr2=(r1-r3)^2  
                   r = (int)Math.sqrt((double)(2*(r-r1)*(r-r1)+(r-r2)*(r-r2)));  
                   g = (int)Math.sqrt((double)(2*(g-g1)*(g-g1)+(g-g2)*(g-g2)));  
                   b = (int)Math.sqrt((double)(2*(b-b1)*(b-b1)+(b-b2)*(b-b2)));  
                   srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b);  
               }  
          }  
          return drawPixels(srcPixels, srcW, srcH);  
     }  
   
 }  


图片的透明处理 其实和第一个渐变效果差不多 只不多这个函数中多了一个透明度参数 使用起来更加方便


     /** 
         *  
         * @param img 
         *            原始图片 
        * @param transparent 
        *            透明度 0-255之间 
         * @return 处理透明度后的图片 
         */  
        public static Image effect_transparent(Image img, int transparent) {  
            if (transparent < 0 || transparent > 255)  
              return img;  
   
          int srcW = img.getWidth();  
          int srcH = img.getHeight();  
          int[] srcPixels = getPixels(img); //函数功能 讲图片数据存入指定数组  
     
         for (int i = 0; i < srcPixels.length; i++) {  
              int a = srcPixels[i] >> 24;  
              srcPixels[i] = (transparent << 24) | (srcPixels[i] & 0x00ffffff);  
   
         }  
          return drawPixels(srcPixels, srcW, srcH); //将数组转化为图片  
      }  




任意角度翻转函数

   /** 
       *@param imgSource  源图像 
      *@param cx   旋转点相对于源图像坐上角横坐标 
      *@param cy   旋转点相对于源图像坐上角纵坐标 
      *@param theta 图像逆时针旋转的角度 
      *@return 旋转后的图像 
         */  
       public Image rotate(Image imgSource, int cx, int cy, double theta)   
     {  
          if (Math.abs(theta % 360) < 1)  
               return imgSource; //角度很小时直接返回  
    
          int w1 = imgSource.getWidth(); //原始图像的高度和宽度  
    
          int h1 = imgSource.getHeight();  
     
          int[] srcMap = new int[w1 * h1];  
    
          imgSource.getRGB(srcMap, 0, w1, 0, 0, w1, h1); //获取原始图像的像素信息  
    
          int dx = cx > w1 / 2 ? cx : w1 - cx; //计算旋转半径  
   
          int dy = cy > h1 / 2 ? cy : h1 - cy;  
     
          double dr = Math.sqrt(dx * dx + dy * dy);  
    
         int wh2 = (int) (2 * dr + 1); //旋转后新图像为正方形,其边长+1是为了防止数组越界  
    
          int[] destMap = new int[wh2 * wh2]; //存放新图像象素的数组  
    
          double destX, destY;  
    
         double radian = theta * Math.PI / 180; //计算角度计算对应的弧度值  
   
          for (int i = 0; i < w1; i++) {  
              for (int j = 0; j < h1; j++) {  
                 if (srcMap[j * w1 + i] >> 24 != 0) { //对非透明点才进行处理  
                      // 得到当前点经旋转后相对于新图像左上角的坐标  
                     destX = dr + (i - cx) * Math.cos(radian) + (j - cy)  
                             * Math.sin(radian);  
                      destY = dr + (j - cy) * Math.cos(radian) - (i - cx)  
                              * Math.sin(radian);  
                     //从源图像中往新图像中填充像素  
                    destMap[(int) destY * wh2 + (int) destX] = srcMap[j * w1  
                               + i];  
                  }  
             }  
          }  
         return Image.createRGBImage(destMap, wh2, wh2, true); //返回旋转后的图像  
      }  

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