/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache License, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License.  You may obtain a copy of the License at
    *
    *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.commons.imaging.formats.tiff.write;
  
  import static org.apache.commons.imaging.formats.tiff.constants.TiffConstants.TIFF_HEADER_SIZE;
  
  import java.io.IOException;
  import java.io.OutputStream;
  import java.nio.ByteOrder;
  import java.util.List;
  
  import org.apache.commons.imaging.ImagingException;
  import org.apache.commons.imaging.common.BinaryOutputStream;
  
  public class TiffImageWriterLossy extends AbstractTiffImageWriter {
  
      public TiffImageWriterLossy() {
          // with default byte order
      }
  
      public TiffImageWriterLossy(final ByteOrder byteOrder) {
          super(byteOrder);
      }
  
      private void updateOffsetsStep(final List<AbstractTiffOutputItem> outputItems) {
          int offset = TIFF_HEADER_SIZE;
  
          for (final AbstractTiffOutputItem outputItem : outputItems) {
              outputItem.setOffset(offset);
              final int itemLength = outputItem.getItemLength();
              offset += itemLength;
  
              final int remainder = imageDataPaddingLength(itemLength);
              offset += remainder;
          }
      }
  
      @Override
      public void write(final OutputStream os, final TiffOutputSet outputSet) throws IOException, ImagingException {
          final TiffOutputSummary outputSummary = validateDirectories(outputSet);
  
          final List<AbstractTiffOutputItem> outputItems = outputSet.getOutputItems(outputSummary);
  
          updateOffsetsStep(outputItems);
  
          outputSummary.updateOffsets(byteOrder);
  
          final BinaryOutputStream bos = BinaryOutputStream.create(os, byteOrder);
  
          // NB: resource is intentionally left open
          writeStep(bos, outputItems);
      }
  
      private void writeStep(final BinaryOutputStream bos, final List<AbstractTiffOutputItem> outputItems) throws IOException, ImagingException {
          writeImageFileHeader(bos);
  
          for (final AbstractTiffOutputItem outputItem : outputItems) {
              outputItem.writeItem(bos);
  
              final int length = outputItem.getItemLength();
  
              final int remainder = imageDataPaddingLength(length);
              for (int j = 0; j < remainder; j++) {
                  bos.write(0);
              }
          }
  
      }
  }