src/java/org/apache/fop/render/pcl/PCLGraphics2DAdapter.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.pcl;

import java.awt.Dimension;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.IOException;

import org.apache.commons.io.output.ByteArrayOutputStream;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.apache.xmlgraphics.java2d.GraphicContext;
import org.apache.xmlgraphics.java2d.Graphics2DImagePainter;

import org.apache.fop.render.AbstractGraphics2DAdapter;
import org.apache.fop.render.RendererContext;
import org.apache.xmlgraphics.util.UnitConv;

/**
 * Graphics2DAdapter implementation for PCL and HP GL/2.
 */
public class PCLGraphics2DAdapter extends AbstractGraphics2DAdapter {

    /** logging instance */
    private static Log log = LogFactory.getLog(PCLGraphics2DAdapter.class);

    /**
     * Main constructor
     */
    public PCLGraphics2DAdapter() {
    }

    /** {@inheritDoc} */
    public void paintImage(Graphics2DImagePainter painter,
            RendererContext context,
            int x, int y, int width, int height) throws IOException {
        PCLRendererContext pclContext = PCLRendererContext.wrapRendererContext(context);
        PCLRenderer pcl = (PCLRenderer)context.getRenderer();
        PCLGenerator gen = pcl.gen;

        // get the 'width' and 'height' attributes of the image/document
        Dimension dim = painter.getImageSize();
        float imw = (float)dim.getWidth();
        float imh = (float)dim.getHeight();

        boolean painted = false;
        boolean paintAsBitmap = pclContext.paintAsBitmap();
        if (!paintAsBitmap) {
            ByteArrayOutputStream baout = new ByteArrayOutputStream();
            PCLGenerator tempGen = new PCLGenerator(baout, gen.getMaximumBitmapResolution());
            try {
                GraphicContext ctx = (GraphicContext)pcl.getGraphicContext().clone();

                AffineTransform prepareHPGL2 = new AffineTransform();
                prepareHPGL2.scale(0.001, 0.001);
                ctx.setTransform(prepareHPGL2);

                PCLGraphics2D graphics = new PCLGraphics2D(tempGen);
                graphics.setGraphicContext(ctx);
                graphics.setClippingDisabled(pclContext.isClippingDisabled());
                Rectangle2D area = new Rectangle2D.Double(0.0, 0.0, imw, imh);
                painter.paint(graphics, area);

                //If we arrive here, the graphic is natively paintable, so write the graphic
                pcl.saveGraphicsState();
                pcl.setCursorPos(x, y);
                gen.writeCommand("*c" + gen.formatDouble4(width / 100f) + "x"
                        + gen.formatDouble4(height / 100f) + "Y");
                gen.writeCommand("*c0T");
                gen.enterHPGL2Mode(false);
                gen.writeText("\nIN;");
                gen.writeText("SP1;");
                //One Plotter unit is 0.025mm!
                double scale = imw / UnitConv.mm2pt(imw * 0.025);
                gen.writeText("SC0," + gen.formatDouble4(scale)
                        + ",0,-" + gen.formatDouble4(scale) + ",2;");
                gen.writeText("IR0,100,0,100;");
                gen.writeText("PU;PA0,0;\n");
                baout.writeTo(gen.getOutputStream()); //Buffer is written to output stream
                gen.writeText("\n");

                gen.enterPCLMode(false);
                pcl.restoreGraphicsState();
                painted = true;
            } catch (UnsupportedOperationException uoe) {
                log.debug(
                    "Cannot paint graphic natively. Falling back to bitmap painting. Reason: "
                        + uoe.getMessage());
            }
        }

        if (!painted) {
            //Fallback solution: Paint to a BufferedImage
            int resolution = Math.round(context.getUserAgent().getTargetResolution());
            BufferedImage bi = paintToBufferedImage(painter, pclContext,
                    resolution, !pclContext.isColorCanvas(), false);

            pcl.setCursorPos(x, y);
            gen.paintBitmap(bi, new Dimension(width, height), pclContext.isSourceTransparency());
        }
    }

}