http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
/*
 * 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: AbstractPDFImageHandler.java 1135995 2011-06-15 11:04:33Z spepping $ */

package org.apache.fop.render.pdf;

import java.awt.Rectangle;
import java.io.IOException;

import org.apache.xmlgraphics.image.loader.Image;

import org.apache.fop.pdf.PDFImage;
import org.apache.fop.pdf.PDFXObject;
import org.apache.fop.render.ImageHandler;
import org.apache.fop.render.RenderingContext;
import org.apache.fop.render.pdf.PDFLogicalStructureHandler.MarkedContentInfo;


A partial implementation of a PDF-specific image handler, containing the code that is
common between image flavors.

/**
 * A partial implementation of a PDF-specific image handler, containing the code that is
 * common between image flavors.
 */
abstract class AbstractPDFImageHandler implements ImageHandler {

    
{@inheritDoc} 
/** {@inheritDoc} */
    public void handleImage(RenderingContext context, Image image, Rectangle pos)
            throws IOException {
        assert context instanceof PDFRenderingContext;
        PDFRenderingContext pdfContext = (PDFRenderingContext)context;
        PDFContentGenerator generator = pdfContext.getGenerator();
        PDFImage pdfimage = createPDFImage(image, image.getInfo().getOriginalURI());
        PDFXObject xobj = generator.getDocument().addImage(
                generator.getResourceContext(), pdfimage);

        float x = (float)pos.getX() / 1000f;
        float y = (float)pos.getY() / 1000f;
        float w = (float)pos.getWidth() / 1000f;
        float h = (float)pos.getHeight() / 1000f;
        if (context.getUserAgent().isAccessibilityEnabled()) {
            MarkedContentInfo mci = pdfContext.getMarkedContentInfo();
            generator.placeImage(x, y, w, h, xobj, mci.tag, mci.mcid);
        } else {
            generator.placeImage(x, y, w, h, xobj);
        }
    }

    
Creates a PDF image object out of the given image.

Params:
  • image – an image
  • xobjectKey – a key for retrieval of the image from the document's XObject collection
Returns:a suitable PDFImage implementation that can handle the flavour of the given image
/**
     * Creates a PDF image object out of the given image.
     *
     * @param image an image
     * @param xobjectKey a key for retrieval of the image from the document's XObject collection
     * @return a suitable {@link PDFImage} implementation that can handle the flavour of
     * the given image
     */
    abstract PDFImage createPDFImage(Image image, String xobjectKey);
}