org.apache.fop.svg.PDFGraphicsConfiguration Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of fop Show documentation

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.

There is a newer version: 2.9

Show newest version

/*
 * 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: PDFGraphicsConfiguration.java 985537 2010-08-14 17:17:00Z jeremias $ */

package org.apache.fop.svg;

import java.awt.GraphicsDevice;
import java.awt.Rectangle;
import java.awt.Transparency;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;


/**
 * Our implementation of the class that returns information about
 * roughly what we can handle and want to see (alpha for example).
 */
class PDFGraphicsConfiguration extends GraphicsConfiguration {
    // We use this to get a good colormodel..
    private static final BufferedImage BI_WITH_ALPHA
        = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
    // We use this to get a good colormodel..
    private static final BufferedImage BI_WITHOUT_ALPHA
        = new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB);

    /**
     * Construct a buffered image with an alpha channel, unless
     * transparencty is OPAQUE (no alpha at all).
     *
     * @param width the width of the image
     * @param height the height of the image
     * @param transparency the alpha value of the image
     * @return the new buffered image
     */
    public BufferedImage createCompatibleImage(int width, int height,
            int transparency) {
        if (transparency == Transparency.OPAQUE) {
            return new BufferedImage(width, height,
                                     BufferedImage.TYPE_INT_RGB);
        } else {
            return new BufferedImage(width, height,
                                     BufferedImage.TYPE_INT_ARGB);
        }
    }

    /**
     * Construct a buffered image with an alpha channel.
     *
     * @param width the width of the image
     * @param height the height of the image
     * @return the new buffered image
     */
    public BufferedImage createCompatibleImage(int width, int height) {
        return new BufferedImage(width, height,
                                 BufferedImage.TYPE_INT_ARGB);
    }

    /**
     * TODO: This should return the page bounds in Pts,
     * I couldn't figure out how to get this for the current
     * page from the PDFDocument (this still works for now,
     * but it should be fixed...).
     *
     * @return the bounds of the PDF document page
     */
    public Rectangle getBounds() {
        return null;
    }

    /**
     * Return a good default color model for this 'device'.
     * @return the colour model for the configuration
     */
    public ColorModel getColorModel() {
        return BI_WITH_ALPHA.getColorModel();
    }

    /**
     * Return a good color model given transparency
     *
     * @param transparency the alpha value for the colour model
     * @return the colour model for the configuration
     */
    public ColorModel getColorModel(int transparency) {
        if (transparency == Transparency.OPAQUE) {
            return BI_WITHOUT_ALPHA.getColorModel();
        } else {
            return BI_WITH_ALPHA.getColorModel();
        }
    }

    /**
     * The default transform (1:1).
     *
     * @return the default transform for the configuration
     */
    public AffineTransform getDefaultTransform() {
        return new AffineTransform();
    }

    /**
     * The normalizing transform (1:1) (since we currently
     * render images at 72dpi, which we might want to change
     * in the future).
     *
     * @return the normalizing transform for the configuration
     */
    public AffineTransform getNormalizingTransform() {
        return new AffineTransform(2, 0, 0, 2, 0, 0);
    }

    /**
     * Return our dummy instance of GraphicsDevice
     *
     * @return the PDF graphics device
     */
    public GraphicsDevice getDevice() {
        return new PDFGraphicsDevice(this);
    }

}