Examples of org.im4java.core.IMOperation

org.im4java.core.IMOperation
This class models the command-line of ImageMagick. It extends the class IMOps and adds some utility-methods (like appendVertically()) not found in ImageMagick, mainly for ease of use. Subclasses of IMOperation implement more specific operations (e.g. ChannelMixer).
If you want to switch between GraphicsMagick and ImageMagick at runtime (using the system-property im4java.useGM=true), you have to limit yourself to the subset of options common to both implementations.
@version $Revision: 1.12 $ @author $Author: bablokb $ @since 0.95

    String tiffPath = tiff.getFile().getAbsolutePath();
    String jp2Path = currentPath + File.separator + "sample.jp2";


    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();


    IMOperation op = new IMOperation();
    op.addImage(tiffPath);
    op.addImage("jp2:-");


    Pipe pipe = new Pipe(null, byteArrayOutputStream);


    ConvertCmd convert = new ConvertCmd();
    convert.setOutputConsumer(pipe);

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      tmpJp2.deleteOnExit();
    } catch (IOException e2) {
      e2.printStackTrace();
    }


    IMOperation op = new IMOperation();
    op.addImage(tmpTiff.getAbsolutePath());
    op.resize(maxHeight, maxWidth);
    op.addImage(tmpJp2.getAbsolutePath());


    ConvertCmd convert = new ConvertCmd();
    try {
      convert.run(op);
    } catch (IOException e) {

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      tmpTn.deleteOnExit();
    } catch (IOException e2) {
      e2.printStackTrace();
    }


    IMOperation op = new IMOperation();
    op.thumbnail(150);
    op.addImage(tmpJp2.getAbsolutePath());
    op.addImage(tmpTn.getAbsolutePath());


    ConvertCmd convert = new ConvertCmd();
    try {
      convert.run(op);
    } catch (IOException e) {

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        try {
            // create command
            ConvertCmd cmd = new ConvertCmd();


            // create the operation, add images and operators/options
            IMOperation op = new IMOperation();
            op.addImage(getFile(iw).getPath());


            if(square) {
                op.resize(size,size,"^");
                op.gravity("center");
                op.crop(size,size,0,0);
            } else {
                op.resize(size,size);
            }


            op.addImage(outputFile.getPath());


            cmd.run(op);
        } catch (Exception e) {
            e.printStackTrace();
            return false;

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        try {
            // create command
            ConvertCmd cmd = new ConvertCmd();


            // create the operation, add images and operators/options
            IMOperation op = new IMOperation();
            op.addImage(getFile(i).getPath());
            op.crop(width, height, left, top);
            op.addImage(outputFile.getPath());


            cmd.run(op);
        } catch (Exception e) {
            e.printStackTrace();
            return false;

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        try {
            // create command
            ConvertCmd cmd = new ConvertCmd();


            // create the operation, add images and operators/options
            IMOperation op = new IMOperation();
            op.addImage(getFile(i).getPath());
            op.resize(width, height);
            op.addImage(outputFile.getPath());


            cmd.run(op);
        } catch (Exception e) {
            e.printStackTrace();
            return false;

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        try {
            // create command
            ConvertCmd cmd = new ConvertCmd();


            // create the operation, add images and operators/options
            IMOperation op = new IMOperation();
            op.addImage(getFile(i).getPath());
            op.rotate(clockwise ? 90. : -90.);
            op.addImage(outputFile.getPath());


            cmd.run(op);
        } catch (Exception e) {
            e.printStackTrace();
            return false;

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    public static File getThumbnailFile(File f) throws IOException, InterruptedException, IM4JavaException {
      File f2 = new File(f.getParentFile(), f.getName() + ".jpg");
      f2.deleteOnExit();
      ConvertCmd cmd = new ConvertCmd();
    IMOperation op = new IMOperation();
    op.addImage(f.getAbsolutePath());
    op.thumbnail(width, height);
    op.addImage(f2.getAbsolutePath());
        if (MediaFilterManager.isVerbose) {
        System.out.println("IM Thumbnail Param: "+op);
        }
    cmd.run(op);
    return f2;

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    public static File getImageFile(File f, int page) throws IOException, InterruptedException, IM4JavaException {
      File f2 = new File(f.getParentFile(), f.getName() + ".jpg");
      f2.deleteOnExit();
      ConvertCmd cmd = new ConvertCmd();
    IMOperation op = new IMOperation();
    String s = "[" + page + "]";
    op.addImage(f.getAbsolutePath()+s);
    op.addImage(f2.getAbsolutePath());
        if (MediaFilterManager.isVerbose) {
        System.out.println("IM Image Param: "+op);
        }
    cmd.run(op);
    return f2;

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   * @return <code>true</code> if the library is available
   */
  private boolean imageMagickAvailable() {
    try {
      ConvertCmd cmd = new ConvertCmd();
      IMOperation versionOp = new IMOperation();
      versionOp.version();
      cmd.run(versionOp);
      logger.debug("ImageMagick detected and found to be working");
      return true;
    } catch (Throwable e) {
      logger.info("ImageMagick not available: {}", e.getMessage());

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