ImageRenderer.java

package edu.stanford.hci.r3.render.regions;

import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.io.File;

import javax.media.jai.PlanarImage;

import edu.stanford.hci.r3.paper.regions.ImageRegion;
import edu.stanford.hci.r3.render.RegionRenderer;
import edu.stanford.hci.r3.units.Points;
import edu.stanford.hci.r3.units.Units;
import edu.stanford.hci.r3.util.graphics.ImageCache;

public class ImageRenderer extends RegionRenderer {

        private ImageRegion imgRegion;

        public ImageRenderer(ImageRegion region) {
                super(region);
                imgRegion = region;
        }

        public void renderToG2D(Graphics2D g2d) {
                if (RegionRenderer.DEBUG_REGIONS) {
                        super.renderToG2D(g2d);
                }
                // final AffineTransform oldTransform = new AffineTransform(g2d.getTransform());
                final File file = imgRegion.getFile();
                final Units units = imgRegion.getUnits();
                final double ppi = imgRegion.getPixelsPerInch(); // default is 72
                final double ppiConversion = 72 / ppi;
                final double conv = units.getConversionTo(new Points());
                final PlanarImage image = ImageCache.loadPlanarImage(file);
                final AffineTransform transform = new AffineTransform();

                // System.out.println(imgRegion);

                // translate to the origin first!
                transform.translate(imgRegion.getX() * conv, imgRegion.getY() * conv);
                // resize the image based on its scale
                transform.scale(imgRegion.getScaleX(), imgRegion.getScaleY());
                // resize the image based on its pixelsPerInch
                transform.scale(ppiConversion, ppiConversion);
                g2d.drawRenderedImage(image, transform);
                // g2d.setTransform(oldTransform);
        }
}

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