Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/jfree/ColorMapper.java @ 9576:c5c53e52f190

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area pattern transparency sinfo tkh
author gernotbelger
date Wed, 07 Nov 2018 14:23:47 +0100
parents 5dacb6ea75a1
children
rev   line source
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d9c89651bd67 Area chart layers may now have an 'arebgpattern'. Real pattern yet to be defined.
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1 /** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by
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3 * Björnsen Beratende Ingenieure GmbH
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4 * Dr. Schumacher Ingenieurbüro für Wasser und Umwelt
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5 *
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6 * This file is Free Software under the GNU AGPL (>=v3)
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7 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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8 * documentation coming with Dive4Elements River for details.
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9 */
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10 package org.dive4elements.river.jfree;
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11
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12 import java.awt.Color;
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13 import java.awt.image.LookupTable;
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14
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15 final class ColorMapper extends LookupTable {
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16
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17 private final int[] from;
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18 private final int[] to;
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19
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20 public ColorMapper(final Color from, final Color to) {
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21 super(0, 4);
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22
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23 this.from = new int[] { from.getRed(), from.getGreen(), from.getBlue(), from.getAlpha(), };
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24 this.to = new int[] { to.getRed(), to.getGreen(), to.getBlue(), to.getAlpha(), };
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25 }
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26
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27 @Override
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28 public int[] lookupPixel(final int[] src, final int[] dest) {
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29 final int[] out = dest == null ? new int[src.length] : dest;
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30
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c5c53e52f190 area pattern transparency sinfo tkh
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31 // REMARK: only check opacity, because the transparency of the pattern-images is not 100% good
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32 if (src[3] > 128) {
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33 out[0] = this.to[0];
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34 out[1] = this.to[1];
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35 out[2] = this.to[2];
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36 out[3] = this.to[3];
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37 } else {
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38 out[0] = 0;
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39 out[1] = 0;
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40 out[2] = 0;
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41 out[3] = 0;
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42 }
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43
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44 return out;
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45 }
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46 }
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