| /** |
| * 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.pdfbox.jbig2.segments; |
| |
| import java.io.IOException; |
| |
| import org.apache.pdfbox.jbig2.SegmentData; |
| import org.apache.pdfbox.jbig2.SegmentHeader; |
| import org.apache.pdfbox.jbig2.err.IntegerMaxValueException; |
| import org.apache.pdfbox.jbig2.err.InvalidHeaderValueException; |
| import org.apache.pdfbox.jbig2.io.SubInputStream; |
| |
| /** |
| * This class represents a "Table" segment. It handles custom tables, see Annex B. |
| */ |
| public class Table implements SegmentData |
| { |
| |
| private SubInputStream subInputStream; |
| |
| /** Code table flags, B.2.1, page 87 */ |
| private int htOutOfBand; |
| private int htPS; |
| private int htRS; |
| |
| /** Code table lowest value, B.2.2, page 87 */ |
| private int htLow; |
| |
| /** Code table highest value, B.2.3, page 87 */ |
| private int htHigh; |
| |
| private void parseHeader() |
| throws IOException, InvalidHeaderValueException, IntegerMaxValueException |
| { |
| int bit; |
| |
| /* Bit 7 */ |
| if ((bit = subInputStream.readBit()) == 1) |
| { |
| throw new InvalidHeaderValueException( |
| "B.2.1 Code table flags: Bit 7 must be zero, but was " + bit); |
| } |
| |
| /* Bit 4-6 */ |
| htRS = (int) ((subInputStream.readBits(3) + 1) & 0xf); |
| |
| /* Bit 1-3 */ |
| htPS = (int) ((subInputStream.readBits(3) + 1) & 0xf); |
| |
| /* Bit 0 */ |
| htOutOfBand = (int) subInputStream.readBit(); |
| |
| htLow = (int) subInputStream.readBits(32); // & 0xffffffff); |
| htHigh = (int) subInputStream.readBits(32); // & 0xffffffff); |
| } |
| |
| public void init(SegmentHeader header, SubInputStream sis) |
| throws InvalidHeaderValueException, IOException, IntegerMaxValueException |
| { |
| subInputStream = sis; |
| |
| parseHeader(); |
| } |
| |
| public int getHtOOB() |
| { |
| return htOutOfBand; |
| } |
| |
| public int getHtPS() |
| { |
| return htPS; |
| } |
| |
| public int getHtRS() |
| { |
| return htRS; |
| } |
| |
| public int getHtLow() |
| { |
| return htLow; |
| } |
| |
| public int getHtHigh() |
| { |
| return htHigh; |
| } |
| |
| public SubInputStream getSubInputStream() |
| { |
| return subInputStream; |
| } |
| } |