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package org.freehep.graphicsio.ppm;
// PpmEncoder - write out an image as a PPM
//
// Copyright (C)1996,1998 by Jef Poskanzer . All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE.
//
// Visit the ACME Labs Java page for up-to-date versions of this and other
// fine Java utilities: http://www.acme.com/java/
//package Acme.JPM.Encoders;
import java.awt.Image;
import java.awt.image.ImageProducer;
import java.io.DataOutput;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
//import org.freehep.graphicsio.ImageEncoder;
/// Write out an image as a PPM.
//
// Writes an image onto a specified OutputStream in the PPM file format.
//
// Fetch the software.
// Fetch the entire Acme package.
//
// @see ToPpm
public class PPMEncoder extends ImageEncoder {
private List comments = new ArrayList();
// / Constructor.
// @param img The image to encode.
// @param out The stream to write the PPM to.
public PPMEncoder(Image img, OutputStream out) throws IOException {
super(img, new DataOutputStream(out));
}
public PPMEncoder(Image img, DataOutput dos) throws IOException {
super(img, dos);
}
// / Constructor.
// @param prod The ImageProducer to encode.
// @param out The stream to write the PPM to.
public PPMEncoder(ImageProducer prod, OutputStream out) throws IOException {
super(prod, new DataOutputStream(out));
}
public PPMEncoder(ImageProducer prod, DataOutput dos) throws IOException {
super(prod, dos);
}
public void addComment(String comment) {
comments.add(comment);
}
protected void encodeStart(int width, int height) throws IOException {
writeString("P6\n");
for (Iterator i = comments.iterator(); i.hasNext();) {
String comment = i.next();
writeString("# " + comment + "\n");
}
writeString(width + " " + height + "\n");
writeString("255\n");
}
void writeString(String str) throws IOException {
byte[] buf = str.getBytes();
out.write(buf);
}
protected void encodePixels(int x, int y, int w, int h, int[] rgbPixels,
int off, int scansize) throws IOException {
byte[] ppmPixels = new byte[w * 3];
for (int row = 0; row < h; ++row) {
int rowOff = off + row * scansize;
for (int col = 0; col < w; ++col) {
int i = rowOff + col;
int j = col * 3;
ppmPixels[j] = (byte) ((rgbPixels[i] & 0xff0000) >> 16);
ppmPixels[j + 1] = (byte) ((rgbPixels[i] & 0x00ff00) >> 8);
ppmPixels[j + 2] = (byte) (rgbPixels[i] & 0x0000ff);
}
out.write(ppmPixels);
}
}
protected void encodeDone() throws IOException {
// Nothing
}
}