fop/src/java/org/apache/fop/render/pdf/PDFImageHandlerRawJPEG.java

/*
 * 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.
 */

/* $Id$ */

package org.apache.fop.render.pdf;

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

import org.apache.xmlgraphics.image.loader.Image;
import org.apache.xmlgraphics.image.loader.ImageFlavor;
import org.apache.xmlgraphics.image.loader.impl.ImageRawJPEG;

import org.apache.fop.pdf.PDFDocument;
import org.apache.fop.pdf.PDFImage;
import org.apache.fop.pdf.PDFResourceContext;
import org.apache.fop.pdf.PDFXObject;
import org.apache.fop.render.ImageHandler;
import org.apache.fop.render.RendererContext;
import org.apache.fop.render.RenderingContext;

/**
 * Image handler implementation which handles raw JPEG images for PDF output.
 */
public class PDFImageHandlerRawJPEG implements PDFImageHandler, ImageHandler {

    private static final ImageFlavor[] FLAVORS = new ImageFlavor[] {
        ImageFlavor.RAW_JPEG,
    };

    /** {@inheritDoc} */
    public PDFXObject generateImage(RendererContext context, Image image,
            Point origin, Rectangle pos)
            throws IOException {
        PDFRenderer renderer = (PDFRenderer)context.getRenderer();
        ImageRawJPEG jpeg = (ImageRawJPEG)image;
        PDFDocument pdfDoc = (PDFDocument)context.getProperty(
                PDFRendererContextConstants.PDF_DOCUMENT);
        PDFResourceContext resContext = (PDFResourceContext)context.getProperty(
                PDFRendererContextConstants.PDF_CONTEXT);

        PDFImage pdfimage = new ImageRawJPEGAdapter(jpeg, image.getInfo().getOriginalURI());
        PDFXObject xobj = pdfDoc.addImage(resContext, 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;
        renderer.placeImage(x, y, w, h, xobj);

        return xobj;
    }

    /** {@inheritDoc} */
    public void handleImage(RenderingContext context, Image image, Rectangle pos)
                throws IOException {
        PDFRenderingContext pdfContext = (PDFRenderingContext)context;
        PDFContentGenerator generator = pdfContext.getGenerator();
        ImageRawJPEG imageJPEG = (ImageRawJPEG)image;

        PDFImage pdfimage = new ImageRawJPEGAdapter(imageJPEG, 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()) {
            String structElemType = pdfContext.getStructElemType();
            if (structElemType.length() > 0) {
                int sequenceNum = pdfContext.getSequenceNum();
                generator.placeImage(x, y, w, h, xobj, structElemType, sequenceNum);
            } else {
                generator.placeImage(x, y, w, h, xobj);
            }
        } else {
            generator.placeImage(x, y, w, h, xobj);
        }
    }

    /** {@inheritDoc} */
    public int getPriority() {
        return 100;
    }

    /** {@inheritDoc} */
    public Class getSupportedImageClass() {
        return ImageRawJPEG.class;
    }

    /** {@inheritDoc} */
    public ImageFlavor[] getSupportedImageFlavors() {
        return FLAVORS;
    }

    /** {@inheritDoc} */
    public boolean isCompatible(RenderingContext targetContext, Image image) {
        return (image == null || image instanceof ImageRawJPEG)
                && targetContext instanceof PDFRenderingContext;
    }

}