/*
* 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: PSFontUtils.java 512838 2007-02-28 16:42:28Z jeremias $ */
package org.apache.xmlgraphics.ps;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.io.EndianUtils;
import org.apache.commons.io.IOUtils;
import org.apache.xmlgraphics.fonts.Glyphs;
import org.apache.xmlgraphics.util.io.ASCIIHexOutputStream;
import org.apache.xmlgraphics.util.io.SubInputStream;
/**
* Utility code for font handling in PostScript.
*/
public class PSFontUtils {
/**
* This method reads a Type 1 font from a stream and embeds it into a PostScript stream.
* Note: Only the IBM PC Format as described in section 3.3 of the Adobe Technical Note #5040
* is supported.
* @param gen The PostScript generator
* @param in the InputStream from which to read the Type 1 font
* @throws IOException in case an I/O problem occurs
*/
public static void embedType1Font(PSGenerator gen, InputStream in) throws IOException {
boolean finished = false;
while (!finished) {
int segIndicator = in.read();
if (segIndicator < 0) {
throw new IOException("Unexpected end-of-file while reading segment indicator");
} else if (segIndicator != 128) {
throw new IOException("Expected ASCII 128, found: " + segIndicator);
}
int segType = in.read();
if (segType < 0) {
throw new IOException("Unexpected end-of-file while reading segment type");
}
int dataSegLen = 0;
switch (segType) {
case 1: //ASCII
dataSegLen = EndianUtils.readSwappedInteger(in);
BufferedReader reader = new BufferedReader(
new java.io.InputStreamReader(
new SubInputStream(in, dataSegLen), "US-ASCII"));
String line;
while ((line = reader.readLine()) != null) {
gen.writeln(line);
}
break;
case 2: //binary
dataSegLen = EndianUtils.readSwappedInteger(in);
SubInputStream sin = new SubInputStream(in, dataSegLen);
ASCIIHexOutputStream hexOut = new ASCIIHexOutputStream(gen.getOutputStream());
IOUtils.copy(sin, hexOut);
gen.newLine();
break;
case 3: //EOF
finished = true;
break;
default: throw new IOException("Unsupported segment type: " + segType);
}
}
}
/**
* Defines the WinAnsi encoding for use in PostScript files.
* @param gen the PostScript generator
* @throws IOException In case of an I/O problem
*/
public static void defineWinAnsiEncoding(PSGenerator gen) throws IOException {
gen.writeln("/WinAnsiEncoding [");
for (int i = 0; i < Glyphs.WINANSI_ENCODING.length; i++) {
if (i > 0) {
if ((i % 5) == 0) {
gen.newLine();
} else {
gen.write(" ");
}
}
final char ch = Glyphs.WINANSI_ENCODING[i];
final String glyphname = Glyphs.charToGlyphName(ch);
if ("".equals(glyphname)) {
gen.write("/" + Glyphs.NOTDEF);
} else {
gen.write("/");
gen.write(glyphname);
}
}
gen.newLine();
gen.writeln("] def");
}
/**
* Redefines the encoding of a font.
* @param gen the PostScript generator
* @param fontName the font name
* @param encoding the new encoding (must be predefined in the PS file)
* @throws IOException In case of an I/O problem
*/
public static void redefineFontEncoding(PSGenerator gen, String fontName, String encoding)
throws IOException {
gen.writeln("/" + fontName + " findfont");
gen.writeln("dup length dict begin");
gen.writeln(" {1 index /FID ne {def} {pop pop} ifelse} forall");
gen.writeln(" /Encoding " + encoding + " def");
gen.writeln(" currentdict");
gen.writeln("end");
gen.writeln("/" + fontName + " exch definefont pop");
}
}