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Author: Porlus (posted 2013-04-18 17:03:24, viewed 378 times)

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private void pixelate(BufferedImage im, int x, int y, int w, int h, int block) {
      int width = im.getWidth();
      int height = im.getHeight();
      int hw = w >> 1;
      int hh = h >> 1;
      int[] pixels = im.getRGB(0, 0, width, height, null, 0, width);
      int[] temp = pixels.clone();
      int block2 = block * block;
      
      for(int yy = -hh; yy < hh; yy += block) {
         for(int xx = -hw; xx < hw; xx += block) {
            int r = 0;
            int g = 0;
            int b = 0;
            for(int i = 0; i < block; i++) {
               int yd = yy + y + i;
               if(yd < 0 || yd >= height) continue;
               for(int j = 0; j < block; j++) {
                  int xd = xx + x + j;
                  if(xd < 0 || xd >= width) continue;
                  r += (pixels[yd * width + xd] >> 16) & 0xff;
                  g += (pixels[yd * width + xd] >> 8) & 0xff;
                  b += pixels[yd * width + xd] & 0xff;
               }
            }
            if(yy + y < 0 || yy + y >= height || xx + x < 0 || xx + x >= width) continue;
            int col = ((r / block2) << 16) | ((g / block2) << 8) | (b / block2);
            
            for(int i = 0; i < block; i++) {
               int yd = yy + y + i;
               if(yd < 0 || yd >= height) continue;
               for(int j = 0; j < block; j++) {
                  int xd = xx + x + j;
                  if(xd < 0 || xd >= width) continue;
                  temp[yd * width + xd] = col;
               }
            }
         }
      }
      
      im.setRGB(0, 0, width, height, temp, 0, width);
   }





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