org.apache.xmlgraphics.image.loader.impl.ImageLoaderFactoryRawCCITTFax 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: ImageLoaderFactoryRawCCITTFax.java 1681137 2015-05-22 14:54:05Z ssteiner $ */
package org.apache.xmlgraphics.image.loader.impl;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.xmlgraphics.image.codec.tiff.TIFFImage;
import org.apache.xmlgraphics.image.loader.ImageFlavor;
import org.apache.xmlgraphics.image.loader.ImageInfo;
import org.apache.xmlgraphics.image.loader.spi.ImageLoader;
import org.apache.xmlgraphics.util.MimeConstants;
/**
* Factory class for the ImageLoader for raw/undecoded CCITT encoded images.
*/
public class ImageLoaderFactoryRawCCITTFax extends AbstractImageLoaderFactory {
/** logger */
private transient Log log = LogFactory.getLog(ImageLoaderFactoryRawCCITTFax.class);
private static final String[] MIMES = new String[] {
MimeConstants.MIME_TIFF};
private static final ImageFlavor[][] FLAVORS = new ImageFlavor[][] {
{ImageFlavor.RAW_CCITTFAX}};
/**
* Returns the MIME type for a given ImageFlavor if it is from a format that is consumed
* without being undecoded. If the ImageFlavor is no raw flavor, an IllegalArgumentException
* is thrown.
* @param flavor the image flavor
* @return the associated MIME type
*/
public static String getMimeForRawFlavor(ImageFlavor flavor) {
for (int i = 0, ci = FLAVORS.length; i < ci; i++) {
for (int j = 0, cj = FLAVORS[i].length; j < cj; j++) {
if (FLAVORS[i][j].equals(flavor)) {
return MIMES[i];
}
}
}
throw new IllegalArgumentException("ImageFlavor is not a \"raw\" flavor: " + flavor);
}
/** {@inheritDoc} */
public String[] getSupportedMIMETypes() {
return MIMES;
}
/** {@inheritDoc} */
public ImageFlavor[] getSupportedFlavors(String mime) {
for (int i = 0, c = MIMES.length; i < c; i++) {
if (MIMES[i].equals(mime)) {
return FLAVORS[i];
}
}
throw new IllegalArgumentException("Unsupported MIME type: " + mime);
}
/** {@inheritDoc} */
public ImageLoader newImageLoader(ImageFlavor targetFlavor) {
if (targetFlavor.equals(ImageFlavor.RAW_CCITTFAX)) {
return new ImageLoaderRawCCITTFax();
} else {
throw new IllegalArgumentException("Unsupported image flavor: " + targetFlavor);
}
}
/** {@inheritDoc} */
public boolean isAvailable() {
return true;
}
/** {@inheritDoc} */
public boolean isSupported(ImageInfo imageInfo) {
Boolean tiled = (Boolean)imageInfo.getCustomObjects().get("TIFF_TILED");
if (Boolean.TRUE.equals(tiled)) {
//We don't support tiled images
log.trace("Raw CCITT loading not supported for tiled TIFF image");
return false;
}
Integer compression = (Integer)imageInfo.getCustomObjects().get("TIFF_COMPRESSION");
if (compression == null) {
return false;
}
switch (compression) {
case TIFFImage.COMP_FAX_G3_1D:
case TIFFImage.COMP_FAX_G3_2D:
case TIFFImage.COMP_FAX_G4_2D:
Integer stripCount = (Integer)imageInfo.getCustomObjects().get("TIFF_STRIP_COUNT");
boolean supported = (stripCount != null && stripCount == 1);
if (!supported) {
log.trace("Raw CCITT loading not supported for multi-strip TIFF image");
}
return supported;
default:
return false;
}
}
}