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/*
* Copyright 2001-2006 The Apache Software Foundation.
*
* 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.
*/
/* $Id$ */
package org.apache.fop.render.ps;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.util.Iterator;
import java.util.Map;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
import org.apache.fop.fonts.CustomFont;
import org.apache.fop.fonts.Font;
import org.apache.fop.fonts.FontInfo;
import org.apache.fop.fonts.FontType;
import org.apache.fop.fonts.LazyFont;
import org.apache.fop.fonts.Typeface;
import org.apache.xmlgraphics.ps.DSCConstants;
import org.apache.xmlgraphics.ps.PSGenerator;
import org.apache.xmlgraphics.ps.PSResource;
/**
* Utility code for font handling in PostScript.
*/
public class PSFontUtils extends org.apache.xmlgraphics.ps.PSFontUtils {
/**
* Generates the PostScript code for the font dictionary.
* @param gen PostScript generator to use for output
* @param fontInfo available fonts
* @return a Map of PSResource instances representing all defined fonts (key: font key)
* @throws IOException in case of an I/O problem
*/
public static Map writeFontDict(PSGenerator gen, FontInfo fontInfo)
throws IOException {
gen.commentln("%FOPBeginFontDict");
gen.writeln("/FOPFonts 100 dict dup begin");
// write("/gfF1{/Helvetica findfont} bd");
// write("/gfF3{/Helvetica-Bold findfont} bd");
Map fonts = fontInfo.getFonts();
Map fontResources = new java.util.HashMap();
Iterator iter = fonts.keySet().iterator();
while (iter.hasNext()) {
String key = (String)iter.next();
Typeface tf = (Typeface)fonts.get(key);
if (tf instanceof LazyFont) {
tf = ((LazyFont)tf).getRealFont();
}
if (tf == null) {
//This is to avoid an NPE if a malconfigured font is in the configuration but not
//used in the document. If it were used, we wouldn't get this far.
String fallbackKey = fontInfo.getInternalFontKey(Font.DEFAULT_FONT);
tf = (Typeface)fonts.get(fallbackKey);
}
PSResource fontRes = new PSResource("font", tf.getFontName());
fontResources.put(key, fontRes);
boolean embeddedFont = false;
if (FontType.TYPE1 == tf.getFontType()) {
if (tf instanceof CustomFont) {
CustomFont cf = (CustomFont)tf;
InputStream in = getInputStreamOnFont(gen, cf);
if (in != null) {
gen.writeDSCComment(DSCConstants.BEGIN_RESOURCE,
fontRes);
embedType1Font(gen, in);
gen.writeDSCComment(DSCConstants.END_RESOURCE);
gen.notifyResourceUsage(fontRes, false);
embeddedFont = true;
}
}
}
if (!embeddedFont) {
gen.writeDSCComment(DSCConstants.INCLUDE_RESOURCE, fontRes);
//Resource usage shall be handled by renderer
//gen.notifyResourceUsage(fontRes, true);
}
gen.commentln("%FOPBeginFontKey: " + key);
gen.writeln("/" + key + " /" + tf.getFontName() + " def");
gen.commentln("%FOPEndFontKey");
}
gen.writeln("end def");
gen.commentln("%FOPEndFontDict");
gen.commentln("%FOPBeginFontReencode");
defineWinAnsiEncoding(gen);
//Rewrite font encodings
iter = fonts.keySet().iterator();
while (iter.hasNext()) {
String key = (String)iter.next();
Typeface fm = (Typeface)fonts.get(key);
if (fm instanceof LazyFont && ((LazyFont)fm).getRealFont() == null) {
continue;
} else if (null == fm.getEncoding()) {
//ignore (ZapfDingbats and Symbol run through here
//TODO: ZapfDingbats and Symbol should get getEncoding() fixed!
} else if ("WinAnsiEncoding".equals(fm.getEncoding())) {
gen.writeln("/" + fm.getFontName() + " findfont");
gen.writeln("dup length dict begin");
gen.writeln(" {1 index /FID ne {def} {pop pop} ifelse} forall");
gen.writeln(" /Encoding " + fm.getEncoding() + " def");
gen.writeln(" currentdict");
gen.writeln("end");
gen.writeln("/" + fm.getFontName() + " exch definefont pop");
} else {
gen.commentln("%WARNING: Only WinAnsiEncoding is supported. Font '"
+ fm.getFontName() + "' asks for: " + fm.getEncoding());
}
}
gen.commentln("%FOPEndFontReencode");
return fontResources;
}
private static InputStream getInputStreamOnFont(PSGenerator gen, CustomFont font)
throws IOException {
if (font.isEmbeddable()) {
Source source = font.getEmbedFileSource();
if (source == null && font.getEmbedResourceName() != null) {
source = new StreamSource(PSFontUtils.class
.getResourceAsStream(font.getEmbedResourceName()));
}
if (source == null) {
return null;
}
InputStream in = null;
if (source instanceof StreamSource) {
in = ((StreamSource) source).getInputStream();
}
if (in == null && source.getSystemId() != null) {
try {
in = new java.net.URL(source.getSystemId()).openStream();
} catch (MalformedURLException e) {
new FileNotFoundException(
"File not found. URL could not be resolved: "
+ e.getMessage());
}
}
if (in == null) {
return null;
}
//Make sure the InputStream is decorated with a BufferedInputStream
if (!(in instanceof java.io.BufferedInputStream)) {
in = new java.io.BufferedInputStream(in);
}
return in;
} else {
return null;
}
}
}
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