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iText, a free Java-PDF library
/*
* $Id: ImgWMF.java 4065 2009-09-16 23:09:11Z psoares33 $
* $Name$
*
* Copyright 1999, 2000, 2001, 2002 by Paulo Soares.
*
* 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.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import com.lowagie.text.error_messages.MessageLocalization;
import com.lowagie.text.pdf.PdfTemplate;
import com.lowagie.text.pdf.codec.wmf.InputMeta;
import com.lowagie.text.pdf.codec.wmf.MetaDo;
/**
* An ImgWMF is the representation of a windows metafile
* that has to be inserted into the document
*
* @see Element
* @see Image
*/
public class ImgWMF extends Image {
// Constructors
ImgWMF(Image image) {
super(image);
}
/**
* Constructs an ImgWMF-object, using an url.
*
* @param url the URL where the image can be found
* @throws BadElementException on error
* @throws IOException on error
*/
public ImgWMF(URL url) throws BadElementException, IOException {
super(url);
processParameters();
}
/**
* Constructs an ImgWMF-object, using a filename.
*
* @param filename a String-representation of the file that contains the image.
* @throws BadElementException on error
* @throws MalformedURLException on error
* @throws IOException on error
*/
public ImgWMF(String filename) throws BadElementException, MalformedURLException, IOException {
this(Utilities.toURL(filename));
}
/**
* Constructs an ImgWMF-object from memory.
*
* @param img the memory image
* @throws BadElementException on error
* @throws IOException on error
*/
public ImgWMF(byte[] img) throws BadElementException, IOException {
super((URL)null);
rawData = img;
originalData = img;
processParameters();
}
/**
* This method checks if the image is a valid WMF and processes some parameters.
* @throws BadElementException
* @throws IOException
*/
private void processParameters() throws BadElementException, IOException {
type = IMGTEMPLATE;
originalType = ORIGINAL_WMF;
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";
}
InputMeta in = new InputMeta(is);
if (in.readInt() != 0x9AC6CDD7) {
throw new BadElementException(MessageLocalization.getComposedMessage("1.is.not.a.valid.placeable.windows.metafile", errorID));
}
in.readWord();
int left = in.readShort();
int top = in.readShort();
int right = in.readShort();
int bottom = in.readShort();
int inch = in.readWord();
dpiX = 72;
dpiY = 72;
scaledHeight = (float)(bottom - top) / inch * 72f;
setTop(scaledHeight);
scaledWidth = (float)(right - left) / inch * 72f;
setRight(scaledWidth);
}
finally {
if (is != null) {
is.close();
}
plainWidth = getWidth();
plainHeight = getHeight();
}
}
/** Reads the WMF into a template.
* @param template the template to read to
* @throws IOException on error
* @throws DocumentException on error
*/
public void readWMF(PdfTemplate template) throws IOException, DocumentException {
setTemplateData(template);
template.setWidth(getWidth());
template.setHeight(getHeight());
InputStream is = null;
try {
if (rawData == null){
is = url.openStream();
}
else{
is = new java.io.ByteArrayInputStream(rawData);
}
MetaDo meta = new MetaDo(is, template);
meta.readAll();
}
finally {
if (is != null) {
is.close();
}
}
}
}