/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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: AbstractFOPImageElementBridge.java 721430 2008-11-28 11:13:12Z acumiskey $ */
package org.apache.fop.svg;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.Rectangle2D;
import org.apache.batik.bridge.BridgeContext;
import org.apache.batik.bridge.SVGImageElementBridge;
import org.apache.batik.gvt.AbstractGraphicsNode;
import org.apache.batik.gvt.GraphicsNode;
import org.apache.batik.util.ParsedURL;
import org.apache.xmlgraphics.image.loader.Image;
import org.apache.xmlgraphics.image.loader.ImageException;
import org.apache.xmlgraphics.image.loader.ImageFlavor;
import org.apache.xmlgraphics.image.loader.ImageInfo;
import org.apache.xmlgraphics.image.loader.ImageManager;
import org.apache.xmlgraphics.image.loader.ImageSessionContext;
import org.apache.xmlgraphics.image.loader.impl.ImageGraphics2D;
import org.apache.xmlgraphics.image.loader.impl.ImageRawCCITTFax;
import org.apache.xmlgraphics.image.loader.impl.ImageRawJPEG;
import org.apache.xmlgraphics.image.loader.impl.ImageXMLDOM;
import org.apache.xmlgraphics.java2d.Graphics2DImagePainter;
import org.w3c.dom.Element;
import org.w3c.dom.svg.SVGDocument;
/**
* Bridge class for the <image> element when jpeg images.
*
* @author <a href="mailto:keiron@aftexsw.com">Keiron Liddle</a>
*/
public abstract class AbstractFOPImageElementBridge extends SVGImageElementBridge {
/**
* Constructs a new bridge for the <image> element.
*/
public AbstractFOPImageElementBridge() { }
/**
* 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) {
AbstractFOPBridgeContext bridgeCtx = (AbstractFOPBridgeContext)ctx;
ImageManager manager = bridgeCtx.getImageManager();
ImageSessionContext sessionContext = bridgeCtx.getImageSessionContext();
try {
ImageInfo info = manager.getImageInfo(purl.toString(), sessionContext);
ImageFlavor[] supportedFlavors = getSupportedFlavours();
Image image = manager.getImage(info, supportedFlavors, sessionContext);
//TODO color profile overrides aren't handled, yet!
//ICCColorSpaceExt colorspaceOverride = extractColorSpace(e, ctx);
AbstractGraphicsNode specializedNode = null;
if (image instanceof ImageXMLDOM) {
ImageXMLDOM xmlImage = (ImageXMLDOM)image;
if (xmlImage.getDocument() instanceof SVGDocument) {
return createSVGImageNode(ctx, imageElement,
(SVGDocument)xmlImage.getDocument());
} else {
//Convert image to Graphics2D
image = manager.convertImage(xmlImage,
new ImageFlavor[] {ImageFlavor.GRAPHICS2D});
}
}
if (image instanceof ImageRawJPEG) {
specializedNode = createLoaderImageNode(image, ctx, imageElement, purl);
} else if (image instanceof ImageRawCCITTFax) {
specializedNode = createLoaderImageNode(image, ctx, imageElement, purl);
} else if (image instanceof ImageGraphics2D) {
ImageGraphics2D g2dImage = (ImageGraphics2D)image;
specializedNode = new Graphics2DNode(g2dImage);
} else {
ctx.getUserAgent().displayError(
new ImageException("Cannot convert an image to a usable format: " + purl));
}
Rectangle2D imgBounds = getImageBounds(ctx, imageElement);
Rectangle2D bounds = specializedNode.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, specializedNode, vb, imgBounds);
return specializedNode;
} catch (Exception e) {
ctx.getUserAgent().displayError(e);
}
return superCreateGraphicsNode(ctx, imageElement, purl);
}
/**
* Calls the superclass' createImageGraphicNode() method to create the normal GraphicsNode.
* @param ctx the bridge context
* @param imageElement the image element
* @param purl the parsed URL
* @return the newly created graphics node
* @see org.apache.batik.bridge.SVGImageElementBridge#createGraphicsNode(BridgeContext, Element)
*/
protected GraphicsNode superCreateGraphicsNode
(BridgeContext ctx, Element imageElement, ParsedURL purl) {
return super.createImageGraphicsNode(ctx, imageElement, purl);
}
/**
* Returns an array of supported image flavours
*
* @return an array of supported image flavours
*/
protected abstract ImageFlavor[] getSupportedFlavours();
/**
* Creates a loader image node implementation
* @param purl the parsed url
* @param imageElement the image element
* @param ctx the batik bridge context
* @param image the image
*
* @return a loader image node implementation
*/
protected LoaderImageNode createLoaderImageNode(
Image image, BridgeContext ctx, Element imageElement, ParsedURL purl) {
return new LoaderImageNode(image, ctx, imageElement, purl);
}
/**
* An image node for natively handled Image instance.
* This holds a natively handled image so that it can be drawn into
* the PDFGraphics2D.
*/
public class LoaderImageNode extends AbstractGraphicsNode {
protected final Image image;
protected final BridgeContext ctx;
protected final Element imageElement;
protected final ParsedURL purl;
protected GraphicsNode origGraphicsNode = null;
/**
* Create a new image node for drawing natively handled images
* into PDF graphics.
* @param image the JPEG image
* @param ctx the bridge context
* @param imageElement the SVG image element
* @param purl the URL to the image
*/
public LoaderImageNode(Image image, BridgeContext ctx,
Element imageElement, ParsedURL purl) {
this.image = image;
this.ctx = ctx;
this.imageElement = imageElement;
this.purl = purl;
}
/** {@inheritDoc} */
public Shape getOutline() {
return getPrimitiveBounds();
}
/** {@inheritDoc} */
public void primitivePaint(Graphics2D g2d) {
if (g2d instanceof NativeImageHandler) {
NativeImageHandler nativeImageHandler = (NativeImageHandler) g2d;
float x = 0;
float y = 0;
try {
float width = image.getSize().getWidthPx();
float height = image.getSize().getHeightPx();
nativeImageHandler.addNativeImage(image, x, y, width, height);
} catch (Exception e) {
ctx.getUserAgent().displayError(e);
}
} else {
// Not going directly into PDF so use
// original implementation so filters etc work.
if (origGraphicsNode == null) {
// Haven't constructed base class Graphics Node,
// so do so now.
origGraphicsNode
= superCreateGraphicsNode(ctx, imageElement, purl);
}
origGraphicsNode.primitivePaint(g2d);
}
}
/** {@inheritDoc} */
public Rectangle2D getGeometryBounds() {
return getPrimitiveBounds();
}
/** {@inheritDoc} */
public Rectangle2D getPrimitiveBounds() {
return new Rectangle2D.Double(0, 0,
image.getSize().getWidthPx(),
image.getSize().getHeightPx());
}
/** {@inheritDoc} */
public Rectangle2D getSensitiveBounds() {
//No interactive features, just return primitive bounds
return getPrimitiveBounds();
}
}
/**
* A node that holds a Graphics2D image.
*/
public class Graphics2DNode extends AbstractGraphicsNode {
private final ImageGraphics2D image;
/**
* Create a new Graphics2D node.
* @param g2d the Graphics2D image
*/
public Graphics2DNode(ImageGraphics2D g2d) {
this.image = g2d;
}
/** {@inheritDoc} */
public Shape getOutline() {
return getPrimitiveBounds();
}
/** {@inheritDoc} */
public void primitivePaint(Graphics2D g2d) {
int width = image.getSize().getWidthPx();
int height = image.getSize().getHeightPx();
Rectangle2D area = new Rectangle2D.Double(0, 0, width, height);
Graphics2DImagePainter painter = image.getGraphics2DImagePainter();
painter.paint(g2d, area);
}
/** {@inheritDoc} */
public Rectangle2D getGeometryBounds() {
return getPrimitiveBounds();
}
/** {@inheritDoc} */
public Rectangle2D getPrimitiveBounds() {
return new Rectangle2D.Double(0, 0,
image.getSize().getWidthPx(),
image.getSize().getHeightPx());
}
/** {@inheritDoc} */
public Rectangle2D getSensitiveBounds() {
//No interactive features, just return primitive bounds
return getPrimitiveBounds();
}
}
}