/*
* 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.fop.render.ps;
import java.io.ByteArrayOutputStream;
import java.util.List;
import org.apache.fontbox.cff.CharStringCommand;
This class represents a formatter for CharString commands of a Type1 font.
author Villu Ruusmann
Version: $Revision: 1.0 $
/**
* This class represents a formatter for CharString commands of a Type1 font.
* author Villu Ruusmann
* @version $Revision: 1.0 $
*/
public class Type1CharStringFormatter {
private ByteArrayOutputStream output;
Formats the given command sequence to a byte array.
Params: - sequence – the given command sequence
Returns: the formatted seuqence as byte array
/**
* Formats the given command sequence to a byte array.
* @param sequence the given command sequence
* @return the formatted seuqence as byte array
*/
public byte[] format(List<Object> sequence) {
output = new ByteArrayOutputStream();
for (Object object : sequence) {
if (object instanceof CharStringCommand) {
writeCommand((CharStringCommand) object);
} else if (object instanceof Number) {
writeNumber(((Number) object).intValue());
} else {
throw new IllegalArgumentException();
}
}
return output.toByteArray();
}
private void writeCommand(CharStringCommand command) {
int[] value = command.getKey().getValue();
for (int aValue : value) {
output.write(aValue);
}
}
private void writeNumber(Integer number) {
int value = number;
if (value >= -107 && value <= 107) {
output.write(value + 139);
} else if (value >= 108 && value <= 1131) {
int b1 = (value - 108) % 256;
int b0 = (value - 108 - b1) / 256 + 247;
output.write(b0);
output.write(b1);
} else if (value >= -1131 && value <= -108) {
int b1 = -((value + 108) % 256);
int b0 = -((value + 108 + b1) / 256 - 251);
output.write(b0);
output.write(b1);
} else {
int b1 = value >>> 24 & 0xff;
int b2 = value >>> 16 & 0xff;
int b3 = value >>> 8 & 0xff;
int b4 = value >>> 0 & 0xff;
output.write(255);
output.write(b1);
output.write(b2);
output.write(b3);
output.write(b4);
}
}
}