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/*
* $Id$
* Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
* For details on use and redistribution please refer to the
* LICENSE file included with these sources.
*/
package org.apache.fop.pdf;
public class PDFT1Stream extends PDFStream {
private int origLength;
private int len1, len3;
private byte[] originalData = null;
public PDFT1Stream(int num, int len) {
super(num);
origLength = len;
}
private final static boolean byteCmp(byte[] src, int offset, byte[] cmp) {
boolean ret = true;
for (int i = 0; ret == true && i < cmp.length; i++) {
// System.out.println("Compare: ");
// System.out.println(" "+src[offset+i]+" "+cmp[i]);
if (src[offset + i] != cmp[i])
ret = false;
}
return ret;
}
/**
* calculates the Length1 and Length3 PDFStream attributes for type1
* font embedding
*/
private void calcLengths(byte[] originalData) {
// Calculate length 1 and 3
// System.out.println ("Checking font, size = "+originalData.length);
// Length1 is the size of the initial ascii portion
// search for "currentfile eexec"
// Get the first binary number and search backwards for "eexec"
len1 = 30;
byte[] eexec = (new String("currentfile eexec")).getBytes();
// System.out.println("Length1="+len1);
while (!byteCmp(originalData, len1 - eexec.length, eexec))
len1++;
// Skip newline
len1++;
// Length3 is length of the last portion of the file
len3 = 0;
byte[] cltom = (new String("cleartomark")).getBytes();
len3 -= cltom.length;
while (!byteCmp(originalData, origLength + len3, cltom)) {
len3--;
// System.out.println("Len3="+len3);
}
len3 = -len3;
len3++;
// Eat 512 zeroes
int numZeroes = 0;
byte[] ws1 = "\n".getBytes();
byte[] ws2 = "\r".getBytes();
byte[] ws3 = "0".getBytes();
while ((originalData[origLength - len3] == ws1[0] || originalData[origLength - len3] == ws2[0] || originalData[origLength - len3] == ws3[0])
&& numZeroes < 512) {
len3++;
if (originalData[origLength - len3] == ws3[0])
numZeroes++;
}
// System.out.println("Length3="+len3);
}
// overload the base object method so we don't have to copy
// byte arrays around so much
protected int output(java.io.OutputStream stream)
throws java.io.IOException {
int length = 0;
String filterEntry = applyFilters();
String preData = new String(this.number + " " + this.generation
+ " obj\n<< /Length "
+ (_data.getSize() + 1) + " " + filterEntry
+ " " + "/Length1 " + len1 + " /Length2 "
+ (origLength - len3 - len1)
+ " /Length3 " + len3 + " >>\n");
byte[] p = preData.getBytes();
stream.write(p);
length += p.length;
length += outputStreamData(stream);
p = "endobj\n".getBytes();
stream.write(p);
length += p.length;
System.out.println("Embedded Type1 font");
return length;
}
public void setData(byte[] data, int size) throws java.io.IOException {
calcLengths(data);
_data.reset();
// System.out.println("Writing " + size + " bytes of font data");
_data.getOutputStream().write(data, 0, size);
}
}
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