Exemplo n.º 1
0
  private static Kdu_coords getReferenceExpansion(
      int reference_component, Kdu_channel_mapping channels, Kdu_codestream codestream)
      throws KduException {

    int c;
    Kdu_coords ref_subs = new Kdu_coords();
    Kdu_coords subs = new Kdu_coords();
    codestream.Get_subsampling(reference_component, ref_subs);
    Kdu_coords min_subs = new Kdu_coords();
    min_subs.Assign(ref_subs);

    for (c = 0; c < channels.Get_num_channels(); c++) {
      codestream.Get_subsampling(channels.Get_source_component(c), subs);
      if (subs.Get_x() < min_subs.Get_x()) min_subs.Set_x(subs.Get_x());
      if (subs.Get_y() < min_subs.Get_y()) min_subs.Set_y(subs.Get_y());
    }

    Kdu_coords expansion = new Kdu_coords();
    expansion.Set_x(ref_subs.Get_x() / min_subs.Get_x());
    expansion.Set_y(ref_subs.Get_y() / min_subs.Get_y());

    for (c = 0; c < channels.Get_num_channels(); c++) {
      codestream.Get_subsampling(channels.Get_source_component(c), subs);
      if ((((subs.Get_x() * expansion.Get_x()) % ref_subs.Get_x()) != 0)
          || (((subs.Get_y() * expansion.Get_y()) % ref_subs.Get_y()) != 0)) {
        Kdu_global.Kdu_print_error(
            "The supplied JP2 file contains color channels "
                + "whose sub-sampling factors are not integer "
                + "multiples of one another.");
        codestream.Apply_input_restrictions(
            0, 1, 0, 0, null, Kdu_global.KDU_WANT_OUTPUT_COMPONENTS);
        channels.Configure(codestream);
        expansion = new Kdu_coords(1, 1);
      }
    }
    return expansion;
  }
Exemplo n.º 2
0
  public BufferedImage extract() throws DjatokaException {
    boolean useRegion = false;
    int left = 0;
    int top = 0;
    int width = 50;
    int height = 50;
    boolean useleftDouble = false;
    Double leftDouble = 0.0;
    boolean usetopDouble = false;
    Double topDouble = 0.0;
    boolean usewidthDouble = false;
    Double widthDouble = 0.0;
    boolean useheightDouble = false;
    Double heightDouble = 0.0;

    if (params.getRegion() != null) {
      StringTokenizer st = new StringTokenizer(params.getRegion(), "{},");
      String token;
      // top
      if ((token = st.nextToken()).contains(".")) {
        topDouble = Double.parseDouble(token);
        usetopDouble = true;
      } else top = Integer.parseInt(token);
      // left
      if ((token = st.nextToken()).contains(".")) {
        leftDouble = Double.parseDouble(token);
        useleftDouble = true;
      } else left = Integer.parseInt(token);
      // height
      if ((token = st.nextToken()).contains(".")) {
        heightDouble = Double.parseDouble(token);
        useheightDouble = true;
      } else height = Integer.parseInt(token);
      // width
      if ((token = st.nextToken()).contains(".")) {
        widthDouble = Double.parseDouble(token);
        usewidthDouble = true;
      } else width = Integer.parseInt(token);

      useRegion = true;
    }

    try {
      if (is != null) {
        File f = File.createTempFile("tmp", ".jp2");
        f.deleteOnExit();
        FileOutputStream fos = new FileOutputStream(f);
        sourceFile = f.getAbsolutePath();
        IOUtils.copyStream(is, fos);
        is.close();
        fos.close();
      }
    } catch (IOException e) {
      throw new DjatokaException(e);
    }

    try {
      Jp2_source inputSource = new Jp2_source();
      Kdu_compressed_source input = null;
      Jp2_family_src jp2_family_in = new Jp2_family_src();
      Jp2_locator loc = new Jp2_locator();
      jp2_family_in.Open(sourceFile, true);
      inputSource.Open(jp2_family_in, loc);
      inputSource.Read_header();
      input = inputSource;

      Kdu_codestream codestream = new Kdu_codestream();
      codestream.Create(input);
      Kdu_channel_mapping channels = new Kdu_channel_mapping();

      if (inputSource.Exists()) channels.Configure(inputSource, false);
      else channels.Configure(codestream);
      int ref_component = channels.Get_source_component(0);
      Kdu_coords ref_expansion = getReferenceExpansion(ref_component, channels, codestream);
      Kdu_dims image_dims = new Kdu_dims();
      codestream.Get_dims(ref_component, image_dims);
      Kdu_coords imageSize = image_dims.Access_size();
      Kdu_coords imagePosition = image_dims.Access_pos();

      if (useleftDouble)
        left = imagePosition.Get_x() + (int) Math.round(leftDouble * imageSize.Get_x());
      if (usetopDouble)
        top = imagePosition.Get_y() + (int) Math.round(topDouble * imageSize.Get_y());
      if (useheightDouble) height = (int) Math.round(heightDouble * imageSize.Get_y());
      if (usewidthDouble) width = (int) Math.round(widthDouble * imageSize.Get_x());

      if (useRegion) {
        imageSize.Set_x(width);
        imageSize.Set_y(height);
        imagePosition.Set_x(left);
        imagePosition.Set_y(top);
      }

      int reduce = 1 << params.getLevelReductionFactor();
      imageSize.Set_x(imageSize.Get_x() * ref_expansion.Get_x());
      imageSize.Set_y(imageSize.Get_y() * ref_expansion.Get_y());
      imagePosition.Set_x(
          imagePosition.Get_x() * ref_expansion.Get_x() / reduce
              - ((ref_expansion.Get_x() / reduce - 1) / 2));
      imagePosition.Set_y(
          imagePosition.Get_y() * ref_expansion.Get_y() / reduce
              - ((ref_expansion.Get_y() / reduce - 1) / 2));

      Kdu_dims view_dims = new Kdu_dims();
      view_dims.Assign(image_dims);
      view_dims.Access_size().Set_x(imageSize.Get_x());
      view_dims.Access_size().Set_y(imageSize.Get_y());

      int region_buf_size = imageSize.Get_x() * imageSize.Get_y();
      int[] region_buf = new int[region_buf_size];
      Kdu_region_decompressor decompressor = new Kdu_region_decompressor();
      decompressor.Start(
          codestream,
          channels,
          -1,
          params.getLevelReductionFactor(),
          16384,
          image_dims,
          ref_expansion,
          new Kdu_coords(1, 1),
          false,
          Kdu_global.KDU_WANT_OUTPUT_COMPONENTS);

      Kdu_dims new_region = new Kdu_dims();
      Kdu_dims incomplete_region = new Kdu_dims();
      Kdu_coords viewSize = view_dims.Access_size();
      incomplete_region.Assign(image_dims);

      int[] imgBuffer = new int[viewSize.Get_x() * viewSize.Get_y()];
      int[] kduBuffer = null;
      while (decompressor.Process(
          region_buf,
          image_dims.Access_pos(),
          0,
          0,
          region_buf_size,
          incomplete_region,
          new_region)) {
        Kdu_coords newOffset = new_region.Access_pos();
        Kdu_coords newSize = new_region.Access_size();
        newOffset.Subtract(view_dims.Access_pos());

        kduBuffer = region_buf;
        int imgBuffereIdx = newOffset.Get_x() + newOffset.Get_y() * viewSize.Get_x();
        int kduBufferIdx = 0;
        int xDiff = viewSize.Get_x() - newSize.Get_x();
        for (int j = 0; j < newSize.Get_y(); j++, imgBuffereIdx += xDiff) {
          for (int i = 0; i < newSize.Get_x(); i++) {
            imgBuffer[imgBuffereIdx++] = kduBuffer[kduBufferIdx++];
          }
        }
      }

      BufferedImage image =
          new BufferedImage(imageSize.Get_x(), imageSize.Get_y(), BufferedImage.TYPE_INT_RGB);
      image.setRGB(0, 0, viewSize.Get_x(), viewSize.Get_y(), imgBuffer, 0, viewSize.Get_x());

      if (params.getRotationDegree() > 0) {
        image = ImageProcessingUtils.rotate(image, params.getRotationDegree());
      }

      decompressor.Native_destroy();
      channels.Native_destroy();
      if (codestream.Exists()) codestream.Destroy();
      inputSource.Native_destroy();
      input.Native_destroy();
      jp2_family_in.Native_destroy();

      return image;
    } catch (KduException e) {
      e.printStackTrace();
      throw new DjatokaException(e);
    } catch (Exception e) {
      e.printStackTrace();
      throw new DjatokaException(e);
    }
  }