Initial import of release 2.2.REL-2.2@923

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@4 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c

1 files changed, 350 insertions, 0 deletions

diff --git a/src/main/java/com/lowagie/text/Jpeg.java b/src/main/java/com/lowagie/text/Jpeg.java
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+/*

+ * $Id: Jpeg.java,v 1.59 2004/12/14 12:33:47 blowagie Exp $

+ * $Name:  $

+ *

+ * Copyright 1999, 2000, 2001, 2002 by 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;

+

+import java.io.InputStream;

+import java.io.IOException;

+import java.net.MalformedURLException;

+import java.net.URL;

+

+/**

+ * An <CODE>Jpeg</CODE> is the representation of a graphic element (JPEG)

+ * that has to be inserted into the document

+ *

+ * @see		Element

+ * @see		Image

+ */

+

+public class Jpeg extends Image implements Element {

+    

+    // public static final membervariables

+    

+    /** This is a type of marker. */

+    public static final int NOT_A_MARKER = -1;

+    

+    /** This is a type of marker. */

+    public static final int VALID_MARKER = 0;

+    

+    /** Acceptable Jpeg markers. */

+    public static final int[] VALID_MARKERS = {0xC0, 0xC1, 0xC2};

+    

+    /** This is a type of marker. */

+    public static final int UNSUPPORTED_MARKER = 1;

+    

+    /** Unsupported Jpeg markers. */

+    public static final int[] UNSUPPORTED_MARKERS = {0xC3, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCD, 0xCE, 0xCF};

+    

+    /** This is a type of marker. */

+    public static final int NOPARAM_MARKER = 2;

+    

+    /** Jpeg markers without additional parameters. */

+    public static final int[] NOPARAM_MARKERS = {0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0x01};

+    

+    /** Marker value */

+    public static final int M_APP0 = 0xE0;

+    /** Marker value */

+    public static final int M_APPE = 0xEE;

+    

+    /** sequence that is used in all Jpeg files */

+    public static final byte JFIF_ID[] = {0x4A, 0x46, 0x49, 0x46, 0x00};

+    // Constructors

+    

+    Jpeg(Image image) {

+        super(image);

+    }

+

+    /**

+     * Constructs a <CODE>Jpeg</CODE>-object, using an <VAR>url</VAR>.

+     *

+     * @param		url			the <CODE>URL</CODE> where the image can be found

+     * @throws BadElementException

+     * @throws IOException

+     */

+    

+    public Jpeg(URL url) throws BadElementException, IOException {

+        super(url);

+        processParameters();

+    }

+    

+    /**

+     * Constructs a <CODE>Jpeg</CODE>-object, using an <VAR>url</VAR>.

+     *

+     * @param		url			the <CODE>URL</CODE> where the image can be found.

+     * @param width new width of the Jpeg

+     * @param height new height of the Jpeg

+     * @throws BadElementException

+     * @throws IOException

+     * @deprecated	use Image.getInstance(...) to create an Image

+     */

+    

+    public Jpeg(URL url, float width, float height) throws BadElementException, IOException {

+        this(url);

+        scaledWidth = width;

+        scaledHeight = height;

+    }

+    

+    /**

+     * Constructs a <CODE>Jpeg</CODE>-object, using a <VAR>filename</VAR>.

+     *

+     * @param		filename	a <CODE>String</CODE>-representation of the file that contains the Image.

+     * @throws BadElementException

+     * @throws MalformedURLException

+     * @throws IOException

+     * @deprecated	use Image.getInstance(...) to create an Image

+     */

+    

+    public Jpeg(String filename) throws BadElementException, MalformedURLException, IOException {

+        this(Image.toURL(filename));

+    }

+    

+    /**

+     * Constructs a <CODE>Jpeg</CODE>-object, using a <VAR>filename</VAR>.

+     *

+     * @param		filename	a <CODE>String</CODE>-representation of the file that contains the Image.

+     * @param width new width of the Jpeg

+     * @param height new height of the Jpeg

+     * @throws BadElementException

+     * @throws MalformedURLException

+     * @throws IOException

+     * @deprecated	use Image.getInstance(...) to create an Image

+     */

+    

+    public Jpeg(String filename, float width, float height) throws BadElementException, MalformedURLException, IOException {

+        this(Image.toURL(filename), width, height);

+    }

+    

+    /**

+     * Constructs a <CODE>Jpeg</CODE>-object from memory.

+     *

+     * @param		img		the memory image

+     * @throws BadElementException

+     * @throws IOException

+     */

+    

+    public Jpeg(byte[] img) throws BadElementException, IOException {

+        super((URL)null);

+        rawData = img;

+        originalData = img;

+        processParameters();

+    }

+    

+    /**

+     * Constructs a <CODE>Jpeg</CODE>-object from memory.

+     *

+     * @param		img			the memory image.

+     * @param		width		the width you want the image to have

+     * @param		height		the height you want the image to have

+     * @throws BadElementException

+     * @throws IOException

+     */

+    

+    public Jpeg(byte[] img, float width, float height) throws BadElementException, IOException {

+        this(img);

+        scaledWidth = width;

+        scaledHeight = height;

+    }

+    

+    // private static methods

+    

+    /**

+     * Reads a short from the <CODE>InputStream</CODE>.

+     *

+     * @param	is		the <CODE>InputStream</CODE>

+     * @return	an int

+     * @throws IOException

+     */

+    

+    private static final int getShort(InputStream is) throws IOException {

+        return (is.read() << 8) + is.read();

+    }

+    

+    /**

+     * Returns a type of marker.

+     *

+     * @param	marker      an int

+     * @return	a type: <VAR>VALID_MARKER</CODE>, <VAR>UNSUPPORTED_MARKER</VAR> or <VAR>NOPARAM_MARKER</VAR>

+     */

+    

+    private static final int marker(int marker) {

+        for (int i = 0; i < VALID_MARKERS.length; i++) {

+            if (marker == VALID_MARKERS[i]) {

+                return VALID_MARKER;

+            }

+        }

+        for (int i = 0; i < NOPARAM_MARKERS.length; i++) {

+            if (marker == NOPARAM_MARKERS[i]) {

+                return NOPARAM_MARKER;

+            }

+        }

+        for (int i = 0; i < UNSUPPORTED_MARKERS.length; i++) {

+            if (marker == UNSUPPORTED_MARKERS[i]) {

+                return UNSUPPORTED_MARKER;

+            }

+        }

+        return NOT_A_MARKER;

+    }

+    

+    // private methods

+    

+    /**

+     * This method checks if the image is a valid JPEG and processes some parameters.

+     * @throws BadElementException

+     * @throws IOException

+     */

+    

+    private void processParameters() throws BadElementException, IOException {

+        type = JPEG;

+        originalType = ORIGINAL_JPEG;

+        InputStream is = null;

+        try {

+            String errorID;

+            if (rawData == null){

+                is = url.openStream();

+                errorID = url.toString();

+            }

+            else{

+                is = new java.io.ByteArrayInputStream(rawData);

+                errorID = "Byte array";

+            }

+            if (is.read() != 0xFF || is.read() != 0xD8)	{

+                throw new BadElementException(errorID + " is not a valid JPEG-file.");

+            }

+            boolean firstPass = true;

+            int len;

+            while (true) {

+                int v = is.read();

+                if (v < 0)

+                    throw new IOException("Premature EOF while reading JPG.");

+                if (v == 0xFF) {

+                    int marker = is.read();

+                    if (firstPass && marker == M_APP0) {

+                        firstPass = false;

+                        len = getShort(is);

+                        if (len < 16) {

+                            skip(is, len - 2);

+                            continue;

+                        }

+                        byte bcomp[] = new byte[JFIF_ID.length];

+                        int r = is.read(bcomp);

+                        if (r != bcomp.length)

+                            throw new BadElementException(errorID + " corrupted JFIF marker.");

+                        boolean found = true;

+                        for (int k = 0; k < bcomp.length; ++k) {

+                            if (bcomp[k] != JFIF_ID[k]) {

+                                found = false;

+                                break;

+                            }

+                        }

+                        if (!found) {

+                            skip(is, len - 2 - bcomp.length);

+                            continue;

+                        }

+                        skip(is, 2);

+                        int units = is.read();

+                        int dx = getShort(is);

+                        int dy = getShort(is);

+                        if (units == 1) {

+                            dpiX = dx;

+                            dpiY = dy;

+                        }

+                        else if (units == 2) {

+                            dpiX = (int)((float)dx * 2.54f + 0.5f);

+                            dpiY = (int)((float)dy * 2.54f + 0.5f);

+                        }

+                        skip(is, len - 2 - bcomp.length - 7);

+                        continue;

+                    }

+                    if (marker == M_APPE) {

+                        len = getShort(is);

+                        byte[] byteappe = new byte[len];

+                        for (int k = 0; k < len; ++k) {

+                            byteappe[k] = (byte)is.read();

+                        }

+                        if (byteappe.length > 12) {

+                            String appe = new String(byteappe, 0, 5, "ISO-8859-1");

+                            if (appe.equals("Adobe")) {

+                                invert = true;

+                            }

+                        }

+                    }

+                    firstPass = false;

+                    int markertype = marker(marker);

+                    if (markertype == VALID_MARKER) {

+                        skip(is, 2);

+                        if (is.read() != 0x08) {

+                            throw new BadElementException(errorID + " must have 8 bits per component.");

+                        }

+                        scaledHeight = getShort(is);

+                        setTop(scaledHeight);

+                        scaledWidth = getShort(is);

+                        setRight(scaledWidth);

+                        colorspace = is.read();

+                        bpc = 8;

+                        break;

+                    }

+                    else if (markertype == UNSUPPORTED_MARKER) {

+                        throw new BadElementException(errorID + ": unsupported JPEG marker: " + marker);

+                    }

+                    else if (markertype != NOPARAM_MARKER) {

+                        skip(is, getShort(is) - 2);

+                    }

+                }

+            }

+        }

+        finally {

+            if (is != null) {

+                is.close();

+            }

+            plainWidth = width();

+            plainHeight = height();

+        }

+    }

+}