1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.imaging.formats.tiff.photometricinterpreters.floatingpoint;
18
19 import java.awt.Color;
20
21 /**
22 * Provides a palette entry for a color assignment to a single value. This class will assign a color to a value only if it is an exact match for the input. This
23 * class will also support Float.NaN
24 */
25 public class PaletteEntryForValue implements PaletteEntry {
26
27 private final float value;
28 private final int iColor;
29 private final Color color;
30 private final boolean isNull;
31
32 /**
33 * Constructs a palette entry for a single value.
34 * <p>
35 * This class will support color-assignments for Float.NaN.
36 *
37 * @param value the color value associated with this palette entry; a Float.NaN is allowed.
38 * @param color the color assigned to value
39 */
40 public PaletteEntryForValue(final float value, final Color color) {
41 if (color == null) {
42 throw new IllegalArgumentException("Null colors not allowed");
43 }
44 this.value = value;
45 this.color = color;
46 this.iColor = color.getRGB();
47 isNull = Float.isNaN(value);
48
49 }
50
51 @Override
52 public boolean coversSingleEntry() {
53 return true;
54 }
55
56 @Override
57 public int getArgb(final float f) {
58 if (isNull && Float.isNaN(f)) {
59 return iColor;
60 }
61 if (f == value) {
62 return iColor;
63 }
64 return 0;
65 }
66
67 @Override
68 public Color getColor(final float f) {
69 if (isNull && Float.isNaN(f)) {
70 return color;
71 }
72 if (f == value) {
73 return color;
74 }
75 return null;
76 }
77
78 @Override
79 public float getLowerBound() {
80 return value;
81 }
82
83 @Override
84 public float getUpperBound() {
85 return value;
86 }
87
88 @Override
89 public boolean isCovered(final float f) {
90 if (isNull) {
91 return Float.isNaN(f);
92 }
93 return f == value;
94 }
95
96 @Override
97 public String toString() {
98 return "PaletteEntry for single value" + value;
99 }
100 }