/* * 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.util; import java.awt.color.ColorSpace; import java.awt.color.ICC_Profile; import java.io.InputStream; import java.util.Collections; import java.util.HashMap; import java.util.Map; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.xmlgraphics.java2d.color.ICCColorSpaceWithIntent; import org.apache.xmlgraphics.java2d.color.RenderingIntent; import org.apache.fop.apps.io.InternalResourceResolver; /** * Map with cached ICC based ColorSpace objects. */ public class ColorSpaceCache { /** logger instance */ private static Log log = LogFactory.getLog(ColorSpaceCache.class); private InternalResourceResolver resourceResolver; private Map<String, ColorSpace> colorSpaceMap = Collections.synchronizedMap(new HashMap<String, ColorSpace>()); /** * Default constructor * @param resourceResolver uri resolver */ public ColorSpaceCache(InternalResourceResolver resourceResolver) { this.resourceResolver = resourceResolver; } /** * Create (if needed) and return an ICC ColorSpace instance. * * The ICC profile source is taken from the src attribute of the color-profile FO element. * If the ICC ColorSpace is not yet in the cache a new one is created and stored in the cache. * * The FOP URI resolver is used to try and locate the ICC file. * If that fails null is returned. * * @param profileName the profile name * @param iccProfileSrc ICC Profile source to return a ColorSpace * @param renderingIntent overriding rendering intent * @return ICC ColorSpace object or null if ColorSpace could not be created */ public ColorSpace get(String profileName, String iccProfileSrc, RenderingIntent renderingIntent) { String key = profileName + ":" + iccProfileSrc; // TODO: This stuff needs some TLC, fix it!! ColorSpace colorSpace = null; if (!colorSpaceMap.containsKey(key)) { try { ICC_Profile iccProfile = null; // First attempt to use the FOP URI resolver to locate the ICC // profile InputStream stream = resourceResolver.getResource(iccProfileSrc); if (stream != null) { // FOP URI resolver found ICC profile - create ICC profile // from the Source iccProfile = ICC_Profile.getInstance(stream); } else { // TODO - Would it make sense to fall back on VM ICC // resolution // Problem is the cache might be more difficult to maintain // // FOP URI resolver did not find ICC profile - perhaps the // Java VM can find it? // iccProfile = ICC_Profile.getInstance(iccProfileSrc); } if (iccProfile != null) { colorSpace = new ICCColorSpaceWithIntent(iccProfile, renderingIntent, profileName, iccProfileSrc); } } catch (Exception e) { // Ignore exception - will be logged a bit further down // (colorSpace == null case) log.warn("Exception thrown resolving the color space: " + e.getMessage()); } if (colorSpace != null) { // Put in cache (not when VM resolved it as we can't control colorSpaceMap.put(key, colorSpace); } else { // TODO To avoid an excessive amount of warnings perhaps // register a null ColorMap in the colorSpaceMap log.warn("Color profile '" + iccProfileSrc + "' not found."); } } else { colorSpace = colorSpaceMap.get(key); } return colorSpace; } }