Java tutorial
/* * $Id: PdfImage.java 3715 2009-02-23 15:02:23Z blowagie $ * * Copyright 1999, 2000, 2001, 2002 Bruno Lowagie * * The contents of this file are subject to the Mozilla Public License Version 1.1 * (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.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the License. * * The Original Code is 'iText, a free JAVA-PDF library'. * * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie. * All Rights Reserved. * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved. * * Contributor(s): all the names of the contributors are added in the source code * where applicable. * * Alternatively, the contents of this file may be used under the terms of the * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the * provisions of LGPL are applicable instead of those above. If you wish to * allow use of your version of this file only under the terms of the LGPL * License and not to allow others to use your version of this file under * the MPL, indicate your decision by deleting the provisions above and * replace them with the notice and other provisions required by the LGPL. * If you do not delete the provisions above, a recipient may use your version * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE. * * This library is free software; you can redistribute it and/or modify it * under the terms of the MPL as stated above or under the terms of the GNU * Library General Public License as published by the Free Software Foundation; * either version 2 of the License, or any later version. * * This library is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more * details. * * If you didn't download this code from the following link, you should check if * you aren't using an obsolete version: * http://www.lowagie.com/iText/ */ package com.lowagie.text.pdf; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import com.lowagie.text.Image; /** * <CODE>PdfImage</CODE> is a <CODE>PdfStream</CODE> containing an image-<CODE>Dictionary</CODE> and -stream. */ public class PdfImage extends PdfStream { static final int TRANSFERSIZE = 4096; // membervariables /** This is the <CODE>PdfName</CODE> of the image. */ protected PdfName name = null; // constructor /** * Constructs a <CODE>PdfImage</CODE>-object. * * @param image the <CODE>Image</CODE>-object * @param name the <CODE>PdfName</CODE> for this image * @throws BadPdfFormatException on error */ public PdfImage(Image image, String name, PdfIndirectReference maskRef) throws BadPdfFormatException { super(); this.name = new PdfName(name); put(PdfName.TYPE, PdfName.XOBJECT); put(PdfName.SUBTYPE, PdfName.IMAGE); put(PdfName.WIDTH, new PdfNumber(image.getWidth())); put(PdfName.HEIGHT, new PdfNumber(image.getHeight())); if (image.getLayer() != null) put(PdfName.OC, image.getLayer().getRef()); if (image.isMask() && (image.getBpc() == 1 || image.getBpc() > 0xff)) put(PdfName.IMAGEMASK, PdfBoolean.PDFTRUE); if (maskRef != null) { if (image.isSmask()) put(PdfName.SMASK, maskRef); else put(PdfName.MASK, maskRef); } if (image.isMask() && image.isInverted()) put(PdfName.DECODE, new PdfLiteral("[1 0]")); if (image.isInterpolation()) put(PdfName.INTERPOLATE, PdfBoolean.PDFTRUE); InputStream is = null; try { // Raw Image data if (image.isImgRaw()) { // will also have the CCITT parameters int colorspace = image.getColorspace(); int transparency[] = image.getTransparency(); if (transparency != null && !image.isMask() && maskRef == null) { String s = "["; for (int k = 0; k < transparency.length; ++k) s += transparency[k] + " "; s += "]"; put(PdfName.MASK, new PdfLiteral(s)); } bytes = image.getRawData(); put(PdfName.LENGTH, new PdfNumber(bytes.length)); int bpc = image.getBpc(); if (bpc > 0xff) { if (!image.isMask()) put(PdfName.COLORSPACE, PdfName.DEVICEGRAY); put(PdfName.BITSPERCOMPONENT, new PdfNumber(1)); put(PdfName.FILTER, PdfName.CCITTFAXDECODE); int k = bpc - Image.CCITTG3_1D; PdfDictionary decodeparms = new PdfDictionary(); if (k != 0) decodeparms.put(PdfName.K, new PdfNumber(k)); if ((colorspace & Image.CCITT_BLACKIS1) != 0) decodeparms.put(PdfName.BLACKIS1, PdfBoolean.PDFTRUE); if ((colorspace & Image.CCITT_ENCODEDBYTEALIGN) != 0) decodeparms.put(PdfName.ENCODEDBYTEALIGN, PdfBoolean.PDFTRUE); if ((colorspace & Image.CCITT_ENDOFLINE) != 0) decodeparms.put(PdfName.ENDOFLINE, PdfBoolean.PDFTRUE); if ((colorspace & Image.CCITT_ENDOFBLOCK) != 0) decodeparms.put(PdfName.ENDOFBLOCK, PdfBoolean.PDFFALSE); decodeparms.put(PdfName.COLUMNS, new PdfNumber(image.getWidth())); decodeparms.put(PdfName.ROWS, new PdfNumber(image.getHeight())); put(PdfName.DECODEPARMS, decodeparms); } else { switch (colorspace) { case 1: put(PdfName.COLORSPACE, PdfName.DEVICEGRAY); if (image.isInverted()) put(PdfName.DECODE, new PdfLiteral("[1 0]")); break; case 3: put(PdfName.COLORSPACE, PdfName.DEVICERGB); if (image.isInverted()) put(PdfName.DECODE, new PdfLiteral("[1 0 1 0 1 0]")); break; case 4: default: put(PdfName.COLORSPACE, PdfName.DEVICECMYK); if (image.isInverted()) put(PdfName.DECODE, new PdfLiteral("[1 0 1 0 1 0 1 0]")); } PdfDictionary additional = image.getAdditional(); if (additional != null) putAll(additional); if (image.isMask() && (image.getBpc() == 1 || image.getBpc() > 8)) remove(PdfName.COLORSPACE); put(PdfName.BITSPERCOMPONENT, new PdfNumber(image.getBpc())); if (image.isDeflated()) put(PdfName.FILTER, PdfName.FLATEDECODE); else { flateCompress(image.getCompressionLevel()); } } return; } // GIF, JPEG or PNG String errorID; if (image.getRawData() == null) { is = image.getUrl().openStream(); errorID = image.getUrl().toString(); } else { is = new java.io.ByteArrayInputStream(image.getRawData()); errorID = "Byte array"; } switch (image.type()) { case Image.JPEG: put(PdfName.FILTER, PdfName.DCTDECODE); switch (image.getColorspace()) { case 1: put(PdfName.COLORSPACE, PdfName.DEVICEGRAY); break; case 3: put(PdfName.COLORSPACE, PdfName.DEVICERGB); break; default: put(PdfName.COLORSPACE, PdfName.DEVICECMYK); if (image.isInverted()) { put(PdfName.DECODE, new PdfLiteral("[1 0 1 0 1 0 1 0]")); } } put(PdfName.BITSPERCOMPONENT, new PdfNumber(8)); if (image.getRawData() != null) { bytes = image.getRawData(); put(PdfName.LENGTH, new PdfNumber(bytes.length)); return; } streamBytes = new ByteArrayOutputStream(); transferBytes(is, streamBytes, -1); break; case Image.JPEG2000: put(PdfName.FILTER, PdfName.JPXDECODE); if (image.getColorspace() > 0) { switch (image.getColorspace()) { case 1: put(PdfName.COLORSPACE, PdfName.DEVICEGRAY); break; case 3: put(PdfName.COLORSPACE, PdfName.DEVICERGB); break; default: put(PdfName.COLORSPACE, PdfName.DEVICECMYK); } put(PdfName.BITSPERCOMPONENT, new PdfNumber(image.getBpc())); } if (image.getRawData() != null) { bytes = image.getRawData(); put(PdfName.LENGTH, new PdfNumber(bytes.length)); return; } streamBytes = new ByteArrayOutputStream(); transferBytes(is, streamBytes, -1); break; case Image.JBIG2: put(PdfName.FILTER, PdfName.JBIG2DECODE); put(PdfName.COLORSPACE, PdfName.DEVICEGRAY); put(PdfName.BITSPERCOMPONENT, new PdfNumber(1)); if (image.getRawData() != null) { bytes = image.getRawData(); put(PdfName.LENGTH, new PdfNumber(bytes.length)); return; } streamBytes = new ByteArrayOutputStream(); transferBytes(is, streamBytes, -1); break; default: throw new BadPdfFormatException(errorID + " is an unknown Image format."); } put(PdfName.LENGTH, new PdfNumber(streamBytes.size())); } catch (IOException ioe) { throw new BadPdfFormatException(ioe.getMessage()); } finally { if (is != null) { try { is.close(); } catch (Exception ee) { // empty on purpose } } } } /** * Returns the <CODE>PdfName</CODE> of the image. * * @return the name */ public PdfName name() { return name; } static void transferBytes(InputStream in, OutputStream out, int len) throws IOException { byte buffer[] = new byte[TRANSFERSIZE]; if (len < 0) len = 0x7ffffff; int size; while (len != 0) { size = in.read(buffer, 0, Math.min(len, TRANSFERSIZE)); if (size < 0) return; out.write(buffer, 0, size); len -= size; } } protected void importAll(PdfImage dup) { name = dup.name; compressed = dup.compressed; compressionLevel = dup.compressionLevel; streamBytes = dup.streamBytes; bytes = dup.bytes; hashMap = dup.hashMap; } }