Mercurial > dive4elements > gnv-client
view gnv-artifacts/src/main/java/de/intevation/gnv/raster/RasterToPPM.java @ 1103:faae3fc7b792
Now geometries of the generated layers will also be clipped if a polygon served by the mv-gnv-interface should be used.
gnv-artifacts/trunk@1229 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Tim Englich <tim.englich@intevation.de> |
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date | Mon, 28 Jun 2010 10:48:57 +0000 |
parents | d766fe2d917a |
children | f953c9a559d8 |
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package de.intevation.gnv.raster; import java.awt.Color; import java.io.IOException; import java.io.OutputStream; /** * Little helper class to write a Raster into an output stream * as a Netpbm PPM file. * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a> */ public class RasterToPPM { private RasterToPPM() { } /** * Writes a Raster to a given stream as PPM. * @param raster The raster to be written. * @param palette The palette used to figure out the rgb values. * @param out The stream to write into. * @throws IOException Thrown if some error occurred during writing * data to the output stream. */ public static void writeToPPM( Raster raster, Palette palette, OutputStream out ) throws IOException { int W = raster.getWidth(); int H = raster.getHeight(); out.write(("P6\n" + W + " " + H + "\n255\n").getBytes("US-ASCII")); double [] values = raster.getValues(); int pos = 0; byte [] data = new byte[W*3]; int black = Color.BLACK.getRGB(); for (int i = 0; i < H; ++i) { for (int j = 0; j < data.length; ++pos) { Palette.Entry entry = palette.getEntry(values[pos]); int rgb = entry == null ? black : entry.getColor().getRGB(); data[j++] = (byte)((rgb >> 16) & 0xff); data[j++] = (byte)((rgb >> 8) & 0xff); data[j++] = (byte)( rgb & 0xff); } out.write(data); } out.flush(); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :