org.apache.fop.fonts.truetype.OTFSubSetWriter Maven / Gradle / Ivy
/*
* 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.
*/
/* $Id$ */
package org.apache.fop.fonts.truetype;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
public class OTFSubSetWriter extends OTFFile {
protected int currentPos;
protected ByteArrayOutputStream output = new ByteArrayOutputStream();
public OTFSubSetWriter() throws IOException {
super();
}
public static byte[] concatArray(byte[] a, byte[] b) {
int aLen = a.length;
int bLen = b.length;
byte[] c = new byte[aLen + bLen];
System.arraycopy(a, 0, c, 0, aLen);
System.arraycopy(b, 0, c, aLen, bLen);
return c;
}
/**
* Appends a byte to the output array,
* updates currentPost but not realSize
*/
protected void writeByte(int b) {
output.write(b);
currentPos++;
}
/**
* Appends a USHORT to the output array,
* updates currentPost but not realSize
*/
protected void writeCard16(int s) {
byte b1 = (byte)((s >> 8) & 0xff);
byte b2 = (byte)(s & 0xff);
writeByte(b1);
writeByte(b2);
}
protected void writeThreeByteNumber(int s) {
byte b1 = (byte)((s >> 16) & 0xFF);
byte b2 = (byte)((s >> 8) & 0xFF);
byte b3 = (byte)(s & 0xFF);
writeByte(b1);
writeByte(b2);
writeByte(b3);
}
/**
* Appends a ULONG to the output array,
* at the given position
*/
protected void writeULong(int s) {
byte b1 = (byte)((s >> 24) & 0xff);
byte b2 = (byte)((s >> 16) & 0xff);
byte b3 = (byte)((s >> 8) & 0xff);
byte b4 = (byte)(s & 0xff);
writeByte(b1);
writeByte(b2);
writeByte(b3);
writeByte(b4);
}
protected void writeBytes(byte[] out) {
for (byte anOut : out) {
writeByte(anOut);
}
}
/**
* Returns a subset of the fonts (readFont() MUST be called first in order to create the
* subset).
* @return byte array
*/
public byte[] getFontSubset() {
return output.toByteArray();
}
}