JMagick implements a class instance of basic image processing

This article illustrates JMagick's class for basic image processing. Share with you for your reference. Specific analysis is as follows:

JMagick is an open source API that USES JNI(Java Native Interface) technology to implement the Java access Interface to the ImageMagick API, and therefore will be faster than the pure Java implementation of the image manipulation function.

package com.eportal.img;
import java.awt.Dimension;
import java.io.File;
import org.apache.commons.io.FileUtils;
import com.gif4j.GifDecoder;
import com.gif4j.GifEncoder;
import com.gif4j.GifImage;
import com.gif4j.GifTransformer;
import dlog.common.util.StringUtils;
import magick.ImageInfo;
import magick.MagickException;
import magick.MagickImage;

class JMagickHandler {
  private final static int DEFAULT_QUALITY = 90;
  protected JMagickHandler(){}
  private final static ThreadLocal<MyMagickImage> tLocal = new ThreadLocal<MyMagickImage>();
  private String lastSrc = null;
  
  private synchronized MyMagickImage getMagickImage(String src) throws Exception {
    MyMagickImage mi = tLocal.get();
    if(mi != null && StringUtils.equals(src, lastSrc))
      return mi;
    else if(mi != null)
      tLocal.remove();
    this.lastSrc = src;
    ImageInfo info = new ImageInfo(src);
    mi = new MyMagickImage(info);
    tLocal.set(mi);
    return mi;
  }
  @Override
  public void cleanup() {
    MyMagickImage mi = tLocal.get();
    if(mi != null)
      mi.destroyImages();
    tLocal.remove();
  }
  @Override
  public ImageExtInfo getImageInfo(String src) throws Exception {
    try{
      MagickImage image = this.getMagickImage(src);
      ImageExtInfo ext = new ImageExtInfo();
      Dimension dim = image.getDimension();
      ext.setWidth((int)dim.getWidth());
      ext.setHeight((int)dim.getHeight());
      ext.setSize(image.sizeBlob());
      ext.setAnimated(image.isAnimatedImage());
      return ext;
    }catch(MagickException e){
      return new PureJavaHandler().getImageInfo(src);
    }
  }
  private final static boolean hasUnicode(String str){
    return str.getBytes().length != str.length();
  }
  @Override
  public void resize(String src, String dest, int width, int height, int quality) throws Exception {
    boolean u_src = hasUnicode(src);
    MyMagickImage image;
    File srctmp = null;
    if(u_src){
      srctmp = File.createTempFile("jmagick_s_" + src.hashCode(), null);
      FileUtils.copyFile(new File(src), srctmp);
      image = this.getMagickImage(srctmp.getAbsolutePath());
    }
    else
      image = this.getMagickImage(src);
    image.getImageInfo().setQuality((quality>0)?quality:DEFAULT_QUALITY);
    MagickImage scaledimage = null;
    try{
      if(image.isAnimatedImage()){
        GifImage gifImage = GifDecoder.decode(new File(src));
        GifImage newGif = GifTransformer.resize(gifImage, width, height, false);        
        GifEncoder.encode(newGif, new File(dest));
      }
      else{//others
        scaledimage = image.scaleImage(width, height);
        scaledimage.setImageFormat("JPEG");
        scaledimage.profileImage("*", null);
        boolean u_dest = hasUnicode(dest);
        if(u_dest){
          File tmp = File.createTempFile("jmagick_d_" + dest.hashCode(), null);
          scaledimage.setFileName(tmp.getAbsolutePath()); 
          scaledimage.writeImage(image.getImageInfo());
          FileUtils.copyFile(tmp, new File(dest));
          FileUtils.forceDelete(tmp);
        }
        else{
          scaledimage.setFileName(dest); 
          scaledimage.writeImage(image.getImageInfo());
        }
      }      
    }finally{
      if(srctmp != null) FileUtils.forceDelete(srctmp);
      if(scaledimage != null)
        scaledimage.destroyImages();      
    }
  }
  @Override
  public void rotate(String src, String dest, double degrees) throws Exception {
    boolean u_src = hasUnicode(src);
    MyMagickImage image;
    File srctmp = null;
    if(u_src){
      srctmp = File.createTempFile("jmagick_s_" + src.hashCode(), null);
      FileUtils.copyFile(new File(src), srctmp);
      image = this.getMagickImage(srctmp.getAbsolutePath());
    }
    else
      image = this.getMagickImage(src);
    try{
      MagickImage rotateImg = image.rotateImage(degrees);
      rotateImg.profileImage("*", null);
 
      boolean u_dest = hasUnicode(dest);
      if(u_dest){
        File tmp = File.createTempFile("jmagick_d_" + dest.hashCode(), null);
        rotateImg.setFileName(tmp.getAbsolutePath()); // convert to png
        rotateImg.writeImage(image.getImageInfo());
        rotateImg.destroyImages();
        FileUtils.copyFile(tmp, new File(dest));
        FileUtils.forceDelete(tmp);
      }
      else{
        rotateImg.setFileName(dest); // convert to png
        rotateImg.writeImage(image.getImageInfo());
        rotateImg.destroyImages();       
      }
    }finally{
      if(srctmp != null)
        FileUtils.forceDelete(srctmp);
    }
  }
  private static class MyMagickImage extends MagickImage {
    private ImageInfo imageInfo;
    public ImageInfo getImageInfo() {
      return imageInfo;
    }
    public MyMagickImage(ImageInfo info) throws MagickException{
      super(info);
      this.imageInfo = info;
    }
  }
  @Override
  public void cropImage(String src, int width, int height, int point,
      int point2, String dst) throws Exception {
    // TODO Auto-generated method stub
  }
}

I hope this article has been helpful to your Java programming.