| /* |
| * 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.pdf; |
| import java.io.DataInput; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import org.apache.commons.io.IOUtils; |
| |
| import org.apache.xmlgraphics.image.loader.impl.ImageRawJPEG; |
| import org.apache.xmlgraphics.image.loader.impl.JPEGConstants; |
| import org.apache.xmlgraphics.image.loader.impl.JPEGFile; |
| import org.apache.xmlgraphics.image.loader.util.ImageUtil; |
| |
| import org.apache.fop.pdf.DCTFilter; |
| import org.apache.fop.pdf.PDFDeviceColorSpace; |
| import org.apache.fop.pdf.PDFDocument; |
| import org.apache.fop.pdf.PDFFilter; |
| import org.apache.fop.pdf.PDFFilterList; |
| |
| /** |
| * PDFImage implementation for the PDF renderer which handles raw JPEG images. |
| * <p> |
| * The JPEG is copied to the XObject's stream as-is but some elements (marker segments) are |
| * filtered. For example, an embedded color profile is filtered since it is already added as |
| * a PDF object and associated with the XObject. This way, the PDF file size is kept as small |
| * as possible. |
| */ |
| public class ImageRawJPEGAdapter extends AbstractImageAdapter { |
| |
| private PDFFilter pdfFilter = null; |
| |
| /** |
| * Creates a new PDFImage from an Image instance. |
| * @param image the JPEG image |
| * @param key XObject key |
| */ |
| public ImageRawJPEGAdapter(ImageRawJPEG image, String key) { |
| super(image, key); |
| } |
| |
| /** |
| * Returns the {@link ImageRawJPEG} instance for this adapter. |
| * @return the image instance |
| */ |
| public ImageRawJPEG getImage() { |
| return ((ImageRawJPEG)this.image); |
| } |
| |
| /** {@inheritDoc} */ |
| public void setup(PDFDocument doc) { |
| pdfFilter = new DCTFilter(); |
| pdfFilter.setApplied(true); |
| |
| super.setup(doc); |
| } |
| |
| /** {@inheritDoc} */ |
| public PDFDeviceColorSpace getColorSpace() { |
| // DeviceGray, DeviceRGB, or DeviceCMYK |
| return toPDFColorSpace(getImageColorSpace()); |
| } |
| |
| /** {@inheritDoc} */ |
| public int getBitsPerComponent() { |
| return 8; |
| } |
| |
| /** @return true for CMYK images generated by Adobe Photoshop */ |
| public boolean isInverted() { |
| return getImage().isInverted(); |
| } |
| |
| /** {@inheritDoc} */ |
| public PDFFilter getPDFFilter() { |
| return pdfFilter; |
| } |
| |
| /** {@inheritDoc} */ |
| public void outputContents(OutputStream out) throws IOException { |
| InputStream in = getImage().createInputStream(); |
| in = ImageUtil.decorateMarkSupported(in); |
| try { |
| JPEGFile jpeg = new JPEGFile(in); |
| DataInput din = jpeg.getDataInput(); |
| |
| //Copy the whole JPEG file except: |
| // - the ICC profile |
| //TODO Thumbnails could safely be skipped, too. |
| //TODO Metadata (XMP, IPTC, EXIF) could safely be skipped, too. |
| while (true) { |
| int reclen; |
| int segID = jpeg.readMarkerSegment(); |
| switch (segID) { |
| case JPEGConstants.SOI: |
| out.write(0xFF); |
| out.write(segID); |
| break; |
| case JPEGConstants.EOI: |
| case JPEGConstants.SOS: |
| out.write(0xFF); |
| out.write(segID); |
| IOUtils.copy(in, out); //Just copy the rest! |
| return; |
| /* |
| case JPEGConstants.APP1: //Metadata |
| case JPEGConstants.APPD: |
| jpeg.skipCurrentMarkerSegment(); |
| break;*/ |
| case JPEGConstants.APP2: //ICC (see ICC1V42.pdf) |
| boolean skipICCProfile = false; |
| in.mark(16); |
| try { |
| reclen = jpeg.readSegmentLength(); |
| // Check for ICC profile |
| byte[] iccString = new byte[11]; |
| din.readFully(iccString); |
| din.skipBytes(1); //string terminator (null byte) |
| |
| if ("ICC_PROFILE".equals(new String(iccString, "US-ASCII"))) { |
| skipICCProfile = (this.image.getICCProfile() != null); |
| } |
| } finally { |
| in.reset(); |
| } |
| if (skipICCProfile) { |
| //ICC profile is skipped as it is already embedded as a PDF object |
| jpeg.skipCurrentMarkerSegment(); |
| break; |
| } |
| default: |
| out.write(0xFF); |
| out.write(segID); |
| |
| reclen = jpeg.readSegmentLength(); |
| //write short |
| out.write((reclen >>> 8) & 0xFF); |
| out.write((reclen >>> 0) & 0xFF); |
| int left = reclen - 2; |
| byte[] buf = new byte[2048]; |
| while (left > 0) { |
| int part = Math.min(buf.length, left); |
| din.readFully(buf, 0, part); |
| out.write(buf, 0, part); |
| left -= part; |
| } |
| } |
| } |
| } finally { |
| IOUtils.closeQuietly(in); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| public String getFilterHint() { |
| return PDFFilterList.JPEG_FILTER; |
| } |
| |
| } |
| |