Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/raster/RasterToPPM.java @ 1119:7c4f81f74c47
merged gnv-artifacts
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:00 +0200 |
| parents | f953c9a559d8 |
| children |
comparison
equal
deleted
inserted
replaced
| 1027:fca4b5eb8d2f | 1119:7c4f81f74c47 |
|---|---|
| 1 /* | |
| 2 * Copyright (c) 2010 by Intevation GmbH | |
| 3 * | |
| 4 * This program is free software under the LGPL (>=v2.1) | |
| 5 * Read the file LGPL.txt coming with the software for details | |
| 6 * or visit http://www.gnu.org/licenses/ if it does not exist. | |
| 7 */ | |
| 8 | |
| 9 package de.intevation.gnv.raster; | |
| 10 | |
| 11 import java.awt.Color; | |
| 12 | |
| 13 import java.io.IOException; | |
| 14 import java.io.OutputStream; | |
| 15 | |
| 16 /** | |
| 17 * Little helper class to write a Raster into an output stream | |
| 18 * as a Netpbm PPM file. | |
| 19 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a> | |
| 20 */ | |
| 21 public class RasterToPPM | |
| 22 { | |
| 23 private RasterToPPM() { | |
| 24 } | |
| 25 | |
| 26 /** | |
| 27 * Writes a Raster to a given stream as PPM. | |
| 28 * @param raster The raster to be written. | |
| 29 * @param palette The palette used to figure out the rgb values. | |
| 30 * @param out The stream to write into. | |
| 31 * @throws IOException Thrown if some error occurred during writing | |
| 32 * data to the output stream. | |
| 33 */ | |
| 34 public static void writeToPPM( | |
| 35 Raster raster, | |
| 36 Palette palette, | |
| 37 OutputStream out | |
| 38 ) | |
| 39 throws IOException | |
| 40 { | |
| 41 int W = raster.getWidth(); | |
| 42 int H = raster.getHeight(); | |
| 43 out.write(("P6\n" + W + " " + H + "\n255\n").getBytes("US-ASCII")); | |
| 44 double [] values = raster.getValues(); | |
| 45 int pos = 0; | |
| 46 byte [] data = new byte[W*3]; | |
| 47 int black = Color.BLACK.getRGB(); | |
| 48 for (int i = 0; i < H; ++i) { | |
| 49 for (int j = 0; j < data.length; ++pos) { | |
| 50 Palette.Entry entry = palette.getEntry(values[pos]); | |
| 51 int rgb = entry == null | |
| 52 ? black | |
| 53 : entry.getColor().getRGB(); | |
| 54 data[j++] = (byte)((rgb >> 16) & 0xff); | |
| 55 data[j++] = (byte)((rgb >> 8) & 0xff); | |
| 56 data[j++] = (byte)( rgb & 0xff); | |
| 57 } | |
| 58 out.write(data); | |
| 59 } | |
| 60 out.flush(); | |
| 61 } | |
| 62 } | |
| 63 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |