001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.imaging.formats.tiff.write; 018 019import static org.apache.commons.imaging.formats.tiff.constants.TiffConstants.TIFF_HEADER_SIZE; 020 021import java.io.IOException; 022import java.io.OutputStream; 023import java.nio.ByteOrder; 024import java.util.List; 025 026import org.apache.commons.imaging.ImagingException; 027import org.apache.commons.imaging.common.BinaryOutputStream; 028 029public class TiffImageWriterLossy extends AbstractTiffImageWriter { 030 031 public TiffImageWriterLossy() { 032 // with default byte order 033 } 034 035 public TiffImageWriterLossy(final ByteOrder byteOrder) { 036 super(byteOrder); 037 } 038 039 private void updateOffsetsStep(final List<AbstractTiffOutputItem> outputItems) { 040 int offset = TIFF_HEADER_SIZE; 041 042 for (final AbstractTiffOutputItem outputItem : outputItems) { 043 outputItem.setOffset(offset); 044 final int itemLength = outputItem.getItemLength(); 045 offset += itemLength; 046 047 final int remainder = imageDataPaddingLength(itemLength); 048 offset += remainder; 049 } 050 } 051 052 @Override 053 public void write(final OutputStream os, final TiffOutputSet outputSet) throws IOException, ImagingException { 054 final TiffOutputSummary outputSummary = validateDirectories(outputSet); 055 056 final List<AbstractTiffOutputItem> outputItems = outputSet.getOutputItems(outputSummary); 057 058 updateOffsetsStep(outputItems); 059 060 outputSummary.updateOffsets(byteOrder); 061 062 final BinaryOutputStream bos = BinaryOutputStream.create(os, byteOrder); 063 064 // NB: resource is intentionally left open 065 writeStep(bos, outputItems); 066 } 067 068 private void writeStep(final BinaryOutputStream bos, final List<AbstractTiffOutputItem> outputItems) throws IOException, ImagingException { 069 writeImageFileHeader(bos); 070 071 for (final AbstractTiffOutputItem outputItem : outputItems) { 072 outputItem.writeItem(bos); 073 074 final int length = outputItem.getItemLength(); 075 076 final int remainder = imageDataPaddingLength(length); 077 for (int j = 0; j < remainder; j++) { 078 bos.write(0); 079 } 080 } 081 082 } 083}