1 package edu.jiangxin.apktoolbox.convert.color.colorspace;
2
3 import java.awt.color.ColorSpace;
4
5 public class CmykColorSpace extends ColorSpace {
6
7 protected CmykColorSpace(int type, int numComponents) {
8 super(type, numComponents);
9 }
10
11 public static CmykColorSpace getInstance() {
12 return Holder.INSTANCE;
13 }
14
15 @Override
16 public float[] toRGB(float[] colorvalue) {
17 float c = colorvalue[0];
18 float m = colorvalue[1];
19 float y = colorvalue[2];
20 float k = colorvalue[3];
21
22 float r = 1 - Math.min(1, c * (1 - k) + k);
23 float g = 1 - Math.min(1, m * (1 - k) + k);
24 float b = 1 - Math.min(1, y * (1 - k) + k);
25
26 return new float[]{r, g, b};
27 }
28
29 @Override
30 public float[] fromRGB(float[] rgbvalue) {
31 float r = rgbvalue[0];
32 float g = rgbvalue[1];
33 float b = rgbvalue[2];
34
35 float k = 1 - Math.max(r, Math.max(g, b));
36 float c = (1 - r - k) / (1 - k);
37 float m = (1 - g - k) / (1 - k);
38 float y = (1 - b - k) / (1 - k);
39
40 return new float[]{c, m, y, k};
41 }
42
43 @Override
44 public float[] toCIEXYZ(float[] colorvalue) {
45 float[] rgb = toRGB(colorvalue);
46 return ColorSpace.getInstance(CS_sRGB).toCIEXYZ(rgb);
47 }
48
49 @Override
50 public float[] fromCIEXYZ(float[] colorvalue) {
51 float[] rgb = ColorSpace.getInstance(CS_sRGB).fromCIEXYZ(colorvalue);
52 return fromRGB(rgb);
53 }
54
55 private static class Holder {
56 private static final CmykColorSpace INSTANCE = new CmykColorSpace(TYPE_CMYK, 4);
57 }
58 }