com.lowagie.text.Jpeg Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of itext Show documentation
Show all versions of itext Show documentation
This is a build of the last MPL version of iText.
The newest version!
/*
* $Id: Jpeg.java 4074 2009-10-05 17:17:26Z psoares33 $
*
* 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.awt.color.ICC_Profile;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import com.lowagie.text.error_messages.MessageLocalization;
/**
* An Jpeg 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 {
// 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_APP2 = 0xE2;
/** 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};
private byte[][] icc;
// Constructors
Jpeg(Image image) {
super(image);
}
/**
* Constructs a Jpeg-object, using an url.
*
* @param url the URL where the image can be found
* @throws BadElementException
* @throws IOException
*/
public Jpeg(URL url) throws BadElementException, IOException {
super(url);
processParameters();
}
/**
* Constructs a Jpeg-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 Jpeg-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 InputStream.
*
* @param is the InputStream
* @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: VALID_MARKER, UNSUPPORTED_MARKER or NOPARAM_MARKER
*/
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(MessageLocalization.getComposedMessage("1.is.not.a.valid.jpeg.file", errorID));
}
boolean firstPass = true;
int len;
while (true) {
int v = is.read();
if (v < 0)
throw new IOException(MessageLocalization.getComposedMessage("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) {
Utilities.skip(is, len - 2);
continue;
}
byte bcomp[] = new byte[JFIF_ID.length];
int r = is.read(bcomp);
if (r != bcomp.length)
throw new BadElementException(MessageLocalization.getComposedMessage("1.corrupted.jfif.marker", errorID));
boolean found = true;
for (int k = 0; k < bcomp.length; ++k) {
if (bcomp[k] != JFIF_ID[k]) {
found = false;
break;
}
}
if (!found) {
Utilities.skip(is, len - 2 - bcomp.length);
continue;
}
Utilities.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)(dx * 2.54f + 0.5f);
dpiY = (int)(dy * 2.54f + 0.5f);
}
Utilities.skip(is, len - 2 - bcomp.length - 7);
continue;
}
if (marker == M_APPE) {
len = getShort(is) - 2;
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;
}
}
continue;
}
if (marker == M_APP2) {
len = getShort(is) - 2;
byte[] byteapp2 = new byte[len];
for (int k = 0; k < len; ++k) {
byteapp2[k] = (byte)is.read();
}
if (byteapp2.length >= 14) {
String app2 = new String(byteapp2, 0, 11, "ISO-8859-1");
if (app2.equals("ICC_PROFILE")) {
int order = byteapp2[12] & 0xff;
int count = byteapp2[13] & 0xff;
// some jpeg producers don't know how to count to 1
if (order < 1)
order = 1;
if (count < 1)
count = 1;
if (icc == null)
icc = new byte[count][];
icc[order - 1] = byteapp2;
}
}
continue;
}
firstPass = false;
int markertype = marker(marker);
if (markertype == VALID_MARKER) {
Utilities.skip(is, 2);
if (is.read() != 0x08) {
throw new BadElementException(MessageLocalization.getComposedMessage("1.must.have.8.bits.per.component", errorID));
}
scaledHeight = getShort(is);
setTop(scaledHeight);
scaledWidth = getShort(is);
setRight(scaledWidth);
colorspace = is.read();
bpc = 8;
break;
}
else if (markertype == UNSUPPORTED_MARKER) {
throw new BadElementException(MessageLocalization.getComposedMessage("1.unsupported.jpeg.marker.2", errorID, String.valueOf(marker)));
}
else if (markertype != NOPARAM_MARKER) {
Utilities.skip(is, getShort(is) - 2);
}
}
}
}
finally {
if (is != null) {
is.close();
}
}
plainWidth = getWidth();
plainHeight = getHeight();
if (icc != null) {
int total = 0;
for (int k = 0; k < icc.length; ++k) {
if (icc[k] == null) {
icc = null;
return;
}
total += icc[k].length - 14;
}
byte[] ficc = new byte[total];
total = 0;
for (int k = 0; k < icc.length; ++k) {
System.arraycopy(icc[k], 14, ficc, total, icc[k].length - 14);
total += icc[k].length - 14;
}
try {
ICC_Profile icc_prof = ICC_Profile.getInstance(ficc);
tagICC(icc_prof);
}
catch(IllegalArgumentException e) {
// ignore ICC profile if it's invalid.
}
icc = null;
}
}
}