// Copyright 2002, FreeHEP.
package org.freehep.graphicsio.emf;

import java.awt.Color;
import java.awt.Rectangle;
import java.awt.image.RenderedImage;
import java.io.IOException;
import java.util.Properties;

import org.freehep.util.UserProperties;
import org.freehep.util.io.NoCloseOutputStream;
import org.freehep.util.io.Tag;

import org.freehep.graphicsio.ImageGraphics2D;
import org.freehep.graphicsio.raw.RawImageWriteParam;

/**
 * StretchDIBits TAG. Encoded as plain RGB rather than the not-yet-working PNG format.
 * The BI_code for BI_PNG and BI_JPG seems to be missing from the WINGDI.H file
 * of visual C++.
 *
 * @author Mark Donszelmann
 * @version $Id: StretchDIBits.java,v 1.12 2003/09/29 22:47:14 duns Exp $
 */
public class StretchDIBits
    extends EMFTag implements EMFConstants {

    public final static int size = 80;
    private Rectangle bounds;
    private int x, y, width, height;
    private int xSrc, ySrc, widthSrc, heightSrc;
    private int usage, dwROP;
    private Color bkg;
    private BitmapInfo bmi;

    private RenderedImage image;

    StretchDIBits() {
        super(81, 1);
    }

    public StretchDIBits(Rectangle bounds, int x, int y, int width, int height,
                         RenderedImage image, Color bkg) {
        this();
        this.bounds = bounds;
        this.x = x;
        this.y = y;
        this.width = width;
        this.height = height;
        this.xSrc = 0;
        this.ySrc = 0;
        this.widthSrc = image.getWidth();
        this.heightSrc = image.getHeight();
        this.usage = DIB_RGB_COLORS;
        this.dwROP = SRCCOPY;

        this.bkg = bkg;
        this.image = image;
        this.bmi = null;
    }

    public EMFTag read(int tagID, EMFInputStream emf, int len)
        throws IOException {

        StretchDIBits tag = new StretchDIBits();
        tag.bounds = emf.readRECTL();       // 16
        tag.x = emf.readLONG();             // 20
        tag.y = emf.readLONG();             // 24
        tag.xSrc = emf.readLONG();          // 28
        tag.ySrc = emf.readLONG();          // 32
        tag.width = emf.readLONG();         // 36
        tag.height = emf.readLONG();        // 40
        // ignored
        emf.readDWORD();                    // 44
        emf.readDWORD();                    // 48
        emf.readDWORD();                    // 52
        emf.readDWORD();                    // 56

        tag.usage = emf.readDWORD();        // 60
        tag.dwROP = emf.readDWORD();        // 64
        tag.widthSrc = emf.readLONG();      // 68
        tag.heightSrc = emf.readLONG();     // 72

        // FIXME: this size can differ and can be placed somewhere else
        tag.bmi = new BitmapInfo(emf);

        // FIXME: need to decode image into java Image.
        int[] bytes = emf.readUnsignedByte(len-72-BitmapInfoHeader.size);
        return tag;
    }

    public void write(int tagID, EMFOutputStream emf) throws IOException {
        emf.writeRECTL(bounds);
        emf.writeLONG(x);
        emf.writeLONG(y);
        emf.writeLONG(xSrc);
        emf.writeLONG(ySrc);
        emf.writeLONG(widthSrc);
        emf.writeLONG(heightSrc);
        emf.writeDWORD(size);                       // bmi follows this record immediately
        emf.writeDWORD(BitmapInfoHeader.size);
        emf.writeDWORD(size+BitmapInfoHeader.size); // bitmap follows bmi

        // write image and calculate size
        emf.pushBuffer();
        int encode;
// plain
        encode = BI_RGB;

        UserProperties properties = new UserProperties();
        properties.setProperty(RawImageWriteParam.BACKGROUND, bkg);
        properties.setProperty(RawImageWriteParam.CODE, "BGR");
        properties.setProperty(RawImageWriteParam.PAD, 1);
        ImageGraphics2D.writeImage(image, "raw", properties, new NoCloseOutputStream(emf));
//        emf.writeImage(image, bkg, "BGR", 1);
// png
//        encode = BI_PNG;
//        ImageGraphics2D.writeImage(image, "png", new Properties(), new NoCloseOutputStream(emf));
// jpg
//        encode = BI_JPEG;
//        ImageGraphics2D.writeImage(image, "jpg", new Properties(), new NoCloseOutputStream(emf));
        int length = emf.popBuffer();

        emf.writeDWORD(length);
        emf.writeDWORD(usage);
        emf.writeDWORD(dwROP);
        emf.writeLONG(width);
        emf.writeLONG(height);

        BitmapInfoHeader header = new BitmapInfoHeader(widthSrc, heightSrc, 24,
                                                       encode, length,
                                                       0, 0,
                                                       0, 0);
        bmi = new BitmapInfo(header);
        bmi.write(emf);

        emf.append();
    }

    public String toString() {
        return super.toString()+"\n"+
            "  bounds: "+bounds+"\n"+
            "  x, y, w, h: "+x+" "+y+" "+width+" "+height+"\n"+
            "  xSrc, ySrc, widthSrc, heightSrc: "+xSrc+" "+ySrc+" "+widthSrc+" "+heightSrc+"\n"+
            "  usage: "+usage+"\n"+
            "  dwROP: "+dwROP+"\n"+
            "  bkg: "+bkg+"\n"+
            bmi.toString();
    }
}
