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Diffstat (limited to 'src/main/java/com/lowagie/text/Jpeg.java')
| -rw-r--r-- | src/main/java/com/lowagie/text/Jpeg.java | 350 |
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 new file mode 100644 index 0000000..1b95486 --- /dev/null +++ b/src/main/java/com/lowagie/text/Jpeg.java @@ -0,0 +1,350 @@ +/*
+ * $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();
+ }
+ }
+}
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