org.apache.fop.render.ps.FontResourceCache Maven / Gradle / Ivy
/*
* 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: FontResourceCache.java 1352986 2012-06-22 18:07:04Z vhennebert $ */
package org.apache.fop.render.ps;
import java.util.Map;
import org.apache.xmlgraphics.ps.PSResource;
import org.apache.fop.fonts.FontInfo;
import org.apache.fop.fonts.LazyFont;
import org.apache.fop.fonts.Typeface;
/**
* A cache for font resource objects.
*/
class FontResourceCache {
private final FontInfo fontInfo;
/** This is a map of PSResource instances of all fonts defined (key: font key) */
private Map fontResources = new java.util.HashMap();
public FontResourceCache(FontInfo fontInfo) {
this.fontInfo = fontInfo;
}
/**
* Returns the PSFontResource for the given font key.
* @param key the font key ("F*")
* @return the matching PSFontResource instance
*/
public PSFontResource getFontResourceForFontKey(String key) {
PSFontResource res = null;
if (this.fontResources != null) {
res = (PSFontResource)this.fontResources.get(key);
} else {
this.fontResources = new java.util.HashMap();
}
if (res == null) {
res = PSFontResource.createFontResource(
new PSResource(PSResource.TYPE_FONT, getPostScriptNameForFontKey(key)));
this.fontResources.put(key, res);
}
return res;
}
private String getPostScriptNameForFontKey(String key) {
int pos = key.indexOf('_');
String postFix = null;
if (pos > 0) {
postFix = key.substring(pos);
key = key.substring(0, pos);
}
Map fonts = fontInfo.getFonts();
Typeface tf = fonts.get(key);
if (tf instanceof LazyFont) {
tf = ((LazyFont)tf).getRealFont();
}
if (tf == null) {
throw new IllegalStateException("Font not available: " + key);
}
if (postFix == null) {
return tf.getEmbedFontName();
} else {
return tf.getEmbedFontName() + postFix;
}
}
/**
* Adds a number of fonts to the cache.
* @param fontMap the font map
*/
public void addAll(Map fontMap) {
this.fontResources.putAll(fontMap);
}
}