/*
* Copyright 2010 ZXing authors
*
* Licensed 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 com.google.zxing.oned;
import java.util.Hashtable;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
/**
* This object renders a ITF code as a {@link BitMatrix}.
*
* @author erik.barbara@gmail.com (Erik Barbara)
*/
public final class ITFWriter extends UPCEANWriter {
public BitMatrix encode(String contents,
BarcodeFormat format,
int width,
int height,
Hashtable hints) throws WriterException {
if (format != BarcodeFormat.ITF) {
throw new IllegalArgumentException("Can only encode ITF, but got " + format);
}
return super.encode(contents, format, width, height, hints);
}
public byte[] encode(String contents) {
int length = contents.length();
if (length > 80) {
throw new IllegalArgumentException(
"Requested contents should be less than 80 digits long, but got " + length);
}
byte[] result = new byte[9 + 9 * length];
int[] start = {1, 1, 1, 1};
int pos = appendPattern(result, 0, start, 1);
for (int i = 0; i < length; i += 2) {
int one = Character.digit(contents.charAt(i), 10);
int two = Character.digit(contents.charAt(i+1), 10);
int[] encoding = new int[18];
for (int j = 0; j < 5; j++) {
encoding[(j << 1)] = ITFReader.PATTERNS[one][j];
encoding[(j << 1) + 1] = ITFReader.PATTERNS[two][j];
}
pos += appendPattern(result, pos, encoding, 1);
}
int[] end = {3, 1, 1};
pos += appendPattern(result, pos, end, 1);
return result;
}
}