/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Batik" and "Apache Software Foundation" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation. For more information on the
Apache Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.batik.svggen;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.batik.ext.awt.image.codec.ImageEncoder;
import org.apache.batik.ext.awt.image.codec.PNGImageEncoder;
import org.apache.batik.util.Base64EncoderStream;
import org.w3c.dom.Element;
/**
* This subclass of {@link ImageHandlerBase64Encoder} implements
* functionality specific to the cached version of the image
* encoder.
*
* @author <a href="mailto:paul_evenblij@compuware.com">Paul Evenblij</a>
* @version $Id: CachedImageHandlerBase64Encoder.java,v 1.6 2003/08/08 11:39:20 vhardy Exp $
*/
public class CachedImageHandlerBase64Encoder extends DefaultCachedImageHandler {
/**
* Build a <code>CachedImageHandlerBase64Encoder</code> instance.
*/
public CachedImageHandlerBase64Encoder() {
super();
setImageCacher(new ImageCacher.Embedded());
}
/**
* Creates an Element which can refer to an image.
* Note that no assumptions should be made by the caller about the
* corresponding SVG tag.
*/
public Element createElement(SVGGeneratorContext generatorContext) {
// Create a DOM Element in SVG namespace to refer to an image
// For this cached version we return <use>
Element imageElement =
generatorContext.getDOMFactory().createElementNS(
SVG_NAMESPACE_URI, SVG_USE_TAG);
return imageElement;
}
public String getRefPrefix(){
return "";
}
/**
* Determines the transformation needed to get the cached image to
* scale & position properly. Sets x and y attributes on the element
* accordingly.
*/
protected AffineTransform handleTransform(Element imageElement,
double x, double y,
double srcWidth,
double srcHeight,
double dstWidth,
double dstHeight,
SVGGeneratorContext generatorContext) {
// If scaling is necessary, create a transform, since "width" and "height"
// have no effect on a <use> element referring to an <image> element.
AffineTransform af = new AffineTransform();
double hRatio = dstWidth / srcWidth;
double vRatio = dstHeight / srcHeight;
af.translate(x,y);
if(hRatio != 1 || vRatio != 1) {
af.scale(hRatio, vRatio);
}
if (!af.isIdentity()){
return af;
} else {
return null;
}
}
/**
* Uses PNG encoding.
*/
public void encodeImage(BufferedImage buf, OutputStream os)
throws IOException {
Base64EncoderStream b64Encoder = new Base64EncoderStream(os);
ImageEncoder encoder = new PNGImageEncoder(b64Encoder, null);
encoder.encode(buf);
b64Encoder.close();
}
public int getBufferedImageType(){
return BufferedImage.TYPE_INT_ARGB;
}
}