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.ImageWriteException; 027import org.apache.commons.imaging.common.BinaryOutputStream; 028 029public class TiffImageWriterLossy extends TiffImageWriterBase { 030 031 public TiffImageWriterLossy() { 032 // with default byte order 033 } 034 035 public TiffImageWriterLossy(final ByteOrder byteOrder) { 036 super(byteOrder); 037 } 038 039 @Override 040 public void write(final OutputStream os, final TiffOutputSet outputSet) 041 throws IOException, ImageWriteException { 042 final TiffOutputSummary outputSummary = validateDirectories(outputSet); 043 044 final List<TiffOutputItem> outputItems = outputSet.getOutputItems(outputSummary); 045 046 updateOffsetsStep(outputItems); 047 048 outputSummary.updateOffsets(byteOrder); 049 050 final BinaryOutputStream bos = new BinaryOutputStream(os, byteOrder); 051 052 // NB: resource is intentionally left open 053 writeStep(bos, outputItems); 054 } 055 056 private void updateOffsetsStep(final List<TiffOutputItem> outputItems) { 057 int offset = TIFF_HEADER_SIZE; 058 059 for (final TiffOutputItem outputItem : outputItems) { 060 outputItem.setOffset(offset); 061 final int itemLength = outputItem.getItemLength(); 062 offset += itemLength; 063 064 final int remainder = imageDataPaddingLength(itemLength); 065 offset += remainder; 066 } 067 } 068 069 private void writeStep(final BinaryOutputStream bos, 070 final List<TiffOutputItem> outputItems) throws IOException, 071 ImageWriteException { 072 writeImageFileHeader(bos); 073 074 for (final TiffOutputItem outputItem : outputItems) { 075 outputItem.writeItem(bos); 076 077 final int length = outputItem.getItemLength(); 078 079 final int remainder = imageDataPaddingLength(length); 080 for (int j = 0; j < remainder; j++) { 081 bos.write(0); 082 } 083 } 084 085 } 086}