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/*
* Copyright 1999-2005 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.svg;
import org.apache.batik.bridge.SVGImageElementBridge;
import java.awt.Shape;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.io.BufferedInputStream;
import java.io.InputStream;
import org.w3c.dom.Element;
import org.apache.batik.bridge.BridgeContext;
import org.apache.batik.gvt.AbstractGraphicsNode;
import org.apache.batik.gvt.GraphicsNode;
import org.apache.batik.util.ParsedURL;
import org.apache.fop.image.JpegImage;
import org.apache.fop.image.FopImage;
import org.apache.fop.image.analyser.ImageReaderFactory;
/**
* Bridge class for the <image> element when jpeg images.
*
* @author <a href="mailto:keiron@aftexsw.com">Keiron Liddle</a>
*/
public class PDFImageElementBridge extends SVGImageElementBridge {
/**
* Constructs a new bridge for the <image> element.
*/
public PDFImageElementBridge() { }
/**
* Create the raster image node.
* THis checks if it is a jpeg file and creates a jpeg node
* so the jpeg can be inserted directly into the pdf document.
* @param ctx the bridge context
* @param imageElement the svg element for the image
* @param purl the parsed url for the image resource
* @return a new graphics node
*/
protected GraphicsNode createImageGraphicsNode
(BridgeContext ctx, Element imageElement, ParsedURL purl) {
try {
InputStream is = purl.openStream();
if (!is.markSupported()) {
is = new BufferedInputStream(is, 1024);
}
is.mark(3);
byte [] data = new byte[3];
is.read(data);
is.reset();
if ((data[0] == (byte)0xFF)
&& (data[1] == (byte)0xD8)
&& (data[2] == (byte)0xFF)) {
FopImage.ImageInfo ii = ImageReaderFactory.make
(purl.toString(), is, null);
JpegImage jpeg = new JpegImage(ii);
jpeg.load(FopImage.ORIGINAL_DATA);
PDFJpegNode node = new PDFJpegNode(jpeg, ctx, imageElement, purl);
Rectangle2D imgBounds = getImageBounds(ctx, imageElement);
Rectangle2D bounds = node.getPrimitiveBounds();
float [] vb = new float[4];
vb[0] = 0; // x
vb[1] = 0; // y
vb[2] = (float) bounds.getWidth(); // width
vb[3] = (float) bounds.getHeight(); // height
// handles the 'preserveAspectRatio', 'overflow' and 'clip'
// and sets the appropriate AffineTransform to the image node
initializeViewport(ctx, imageElement, node, vb, imgBounds);
return node;
}
} catch (Exception ex) {
//TODO Handle this exception
}
return superCreateGraphicsNode(ctx, imageElement, purl);
}
/**
* @see org.apache.batik.bridge.SVGImageElementBridge
*/
protected GraphicsNode superCreateGraphicsNode
(BridgeContext ctx, Element imageElement, ParsedURL purl) {
return super.createImageGraphicsNode(ctx, imageElement, purl);
}
/**
* A PDF jpeg node.
* This holds a jpeg image so that it can be drawn into
* the PDFGraphics2D.
*/
public class PDFJpegNode extends AbstractGraphicsNode {
private JpegImage jpeg;
private BridgeContext ctx;
private Element imageElement;
private ParsedURL purl;
private GraphicsNode origGraphicsNode = null;
/**
* Create a new pdf jpeg node for drawing jpeg images
* into pdf graphics.
* @param j the jpeg image
* @param ctx the bridge context
* @param imageElement the SVG image element
* @param purl the URL to the image
*/
public PDFJpegNode(JpegImage j, BridgeContext ctx,
Element imageElement, ParsedURL purl) {
this.jpeg = j;
this.ctx = ctx;
this.imageElement = imageElement;
this.purl = purl;
}
/**
* Get the outline of this image.
* @return the outline shape which is the primitive bounds
*/
public Shape getOutline() {
return getPrimitiveBounds();
}
/**
* Paint this jpeg image.
* As this is used for inserting jpeg into pdf
* it adds the jpeg image to the PDFGraphics2D.
* @param g2d the graphics to draw the image on
*/
public void primitivePaint(Graphics2D g2d) {
if (g2d instanceof PDFGraphics2D) {
PDFGraphics2D pdfg = (PDFGraphics2D) g2d;
float x = 0;
float y = 0;
try {
float width = jpeg.getWidth();
float height = jpeg.getHeight();
pdfg.addJpegImage(jpeg, x, y, width, height);
} catch (Exception e) {
//TODO Handle this exception properly
e.printStackTrace();
}
} else {
// Not going directly into PDF so use
// original implementation so filters etc work.
if (origGraphicsNode == null) {
// Haven't constructed baseclass Graphics Node,
// so do so now.
origGraphicsNode
= PDFImageElementBridge.this.superCreateGraphicsNode
(ctx, imageElement, purl);
}
origGraphicsNode.primitivePaint(g2d);
}
}
/**
* Get the geometrix bounds of the image.
* @return the primitive bounds
*/
public Rectangle2D getGeometryBounds() {
return getPrimitiveBounds();
}
/**
* Get the primitive bounds of this bridge element.
* @return the bounds of the jpeg image
*/
public Rectangle2D getPrimitiveBounds() {
try {
return new Rectangle2D.Double(0, 0, jpeg.getWidth(),
jpeg.getHeight());
} catch (Exception e) {
//TODO Handle this exception properly
e.printStackTrace();
}
return null;
}
/**
* Returns the bounds of the sensitive area covered by this node,
* This includes the stroked area but does not include the effects
* of clipping, masking or filtering.
* @return the bounds of the sensitive area
*/
public Rectangle2D getSensitiveBounds() {
//No interactive features, just return primitive bounds
return getPrimitiveBounds();
}
}
}
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