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/*
* 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.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.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.xmlgraphics.ps.DSCConstants;
import org.apache.xmlgraphics.ps.PSGenerator;
import org.apache.xmlgraphics.ps.PSResource;
import org.apache.xmlgraphics.ps.dsc.ResourceTracker;
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;
/**
* Utility code for font handling in PostScript.
*/
public class PSFontUtils extends org.apache.xmlgraphics.ps.PSFontUtils {
/** logging instance */
protected static Log log = LogFactory.getLog(PSFontUtils.class);
/**
* 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 {
return writeFontDict(gen, fontInfo, fontInfo.getFonts());
}
/**
* Generates the PostScript code for the font dictionary.
* @param gen PostScript generator to use for output
* @param fontInfo available fonts
* @param fonts the set of fonts to work with
* @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, Map fonts)
throws IOException {
gen.commentln("%FOPBeginFontDict");
Map fontResources = new java.util.HashMap();
Iterator iter = fonts.keySet().iterator();
while (iter.hasNext()) {
String key = (String)iter.next();
Typeface tf = getTypeFace(fontInfo, fonts, key);
PSResource fontRes = new PSResource("font", tf.getFontName());
fontResources.put(key, fontRes);
embedFont(gen, tf, fontRes);
}
gen.commentln("%FOPEndFontDict");
reencodeFonts(gen, fonts);
return fontResources;
}
private static void reencodeFonts(PSGenerator gen, Map fonts) throws IOException {
gen.commentln("%FOPBeginFontReencode");
defineWinAnsiEncoding(gen);
//Rewrite font encodings
Iterator 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 used to run through here, kept for safety reasons)
} else if ("SymbolEncoding".equals(fm.getEncoding())) {
//ignore (no encoding redefinition)
} else if ("ZapfDingbatsEncoding".equals(fm.getEncoding())) {
//ignore (no encoding redefinition)
} else if ("WinAnsiEncoding".equals(fm.getEncoding())) {
redefineFontEncoding(gen, fm.getFontName(), fm.getEncoding());
} else {
/* Don't complain anymore, just use the font's default encoding.
gen.commentln("%WARNING: Only WinAnsiEncoding is supported. Font '"
+ fm.getFontName() + "' asks for: " + fm.getEncoding());
*/
}
}
gen.commentln("%FOPEndFontReencode");
}
private static Typeface getTypeFace(FontInfo fontInfo, Map fonts, String key) {
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);
}
return tf;
}
/**
* Embeds a font in the PostScript file.
* @param gen the PostScript generator
* @param tf the font
* @param fontRes the PSResource associated with the font
* @throws IOException In case of an I/O error
*/
public static void embedFont(PSGenerator gen, Typeface tf, PSResource fontRes)
throws IOException {
boolean embeddedFont = false;
if (FontType.TYPE1 == tf.getFontType()) {
if (tf instanceof CustomFont) {
CustomFont cf = (CustomFont)tf;
if (isEmbeddable(cf)) {
InputStream in = getInputStreamOnFont(gen, cf);
if (in != null) {
gen.writeDSCComment(DSCConstants.BEGIN_RESOURCE,
fontRes);
embedType1Font(gen, in);
gen.writeDSCComment(DSCConstants.END_RESOURCE);
gen.getResourceTracker().registerSuppliedResource(fontRes);
embeddedFont = true;
} else {
gen.commentln("%WARNING: Could not embed font: " + cf.getFontName());
log.warn("Font " + cf.getFontName() + " is marked as supplied in the"
+ " PostScript file but could not be embedded!");
}
}
}
}
if (!embeddedFont) {
gen.writeDSCComment(DSCConstants.INCLUDE_RESOURCE, fontRes);
}
}
private static boolean isEmbeddable(CustomFont font) {
return font.isEmbeddable()
&& (font.getEmbedFileName() != null || font.getEmbedResourceName() != null);
}
private static InputStream getInputStreamOnFont(PSGenerator gen, CustomFont font)
throws IOException {
if (isEmbeddable(font)) {
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;
}
}
/**
* Determines the set of fonts that will be supplied with the PS file and registers them
* with the resource tracker. All the fonts that are being processed are returned as a Map.
* @param resTracker the resource tracker
* @param fontInfo available fonts
* @param fonts the set of fonts to work with
* @return a Map of PSResource instances representing all defined fonts (key: font key)
*/
public static Map determineSuppliedFonts(ResourceTracker resTracker,
FontInfo fontInfo, Map fonts) {
Map fontResources = new java.util.HashMap();
Iterator iter = fonts.keySet().iterator();
while (iter.hasNext()) {
String key = (String)iter.next();
Typeface tf = getTypeFace(fontInfo, fonts, key);
PSResource fontRes = new PSResource("font", tf.getFontName());
fontResources.put(key, fontRes);
if (FontType.TYPE1 == tf.getFontType()) {
if (tf instanceof CustomFont) {
CustomFont cf = (CustomFont)tf;
if (isEmbeddable(cf)) {
resTracker.registerSuppliedResource(fontRes);
}
}
}
}
return fontResources;
}
}
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