- /*
- * 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 base a base URI to resolve relative URIs
- * @param iccProfileSrc ICC Profile source to return a ColorSpace for
- * @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)
- }
-
- 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;
- }
- }
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