fop/src/java/org/apache/fop/render/java2d/Java2DGraphics2DAdapter.java

/*
 * Copyright 2005 The Apache Software Foundation.
 * 
 * Licensed 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.java2d;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.io.IOException;

import org.apache.fop.render.Graphics2DAdapter;
import org.apache.fop.render.Graphics2DImagePainter;
import org.apache.fop.render.RendererContext;

/**
 * Graphics2DAdapter implementation for Java2D.
 */
public class Java2DGraphics2DAdapter implements Graphics2DAdapter {

    private Java2DGraphicsState state;

    /**
     * Main constructor
     * @param renderer the Renderer instance to which this instance belongs
     */
    public Java2DGraphics2DAdapter(Java2DGraphicsState state) {
        this.state = state;
    }
    
    /** @see org.apache.fop.render.Graphics2DAdapter */
    public void paintImage(Graphics2DImagePainter painter,
            RendererContext context,
            int x, int y, int width, int height) throws IOException {
        
        float fwidth = width / 1000f;
        float fheight = height / 1000f;
        float fx = x / 1000f;
        float fy = y / 1000f;
        
        // get the 'width' and 'height' attributes of the SVG document
        Dimension dim = painter.getImageSize();
        float imw = (float)dim.getWidth() / 1000f;
        float imh = (float)dim.getHeight() / 1000f;

        float sx = fwidth / (float)imw;
        float sy = fheight / (float)imh;

        state.push();
        state.getGraph().setColor(Color.black);
        state.getGraph().setBackground(Color.black);
        
        //TODO Clip to the image area.

        // transform so that the coordinates (0,0) is from the top left
        // and positive is down and to the right. (0,0) is where the
        // viewBox puts it.
        state.getGraph().translate(fx, fy);
        AffineTransform at = AffineTransform.getScaleInstance(sx, sy);
        if (!at.isIdentity()) {
            state.getGraph().transform(at);
        }

        Rectangle2D area = new Rectangle2D.Double(0.0, 0.0, imw, imh);
        painter.paint(state.getGraph(), area);

        state.pop();
    
    }

}