1 /*
2 Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization
3 dedicated to making software imaging solutions freely available.
4
5 You may not use this file except in compliance with the License. You may
6 obtain a copy of the License at
7
8 https://imagemagick.org/script/license.php
9
10 Unless required by applicable law or agreed to in writing, software
11 distributed under the License is distributed on an "AS IS" BASIS,
12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 See the License for the specific language governing permissions and
14 limitations under the License.
15
16 MagickCore image colorspace private methods.
17 */
18 #ifndef MAGICKCORE_COLORSPACE_PRIVATE_H
19 #define MAGICKCORE_COLORSPACE_PRIVATE_H
20
21 #include "MagickCore/image.h"
22 #include "MagickCore/image-private.h"
23 #include "MagickCore/pixel.h"
24 #include "MagickCore/pixel-accessor.h"
25
26 #if defined(__cplusplus) || defined(c_plusplus)
27 extern "C" {
28 #endif
29
ConvertCMYKToRGB(PixelInfo * pixel)30 static inline void ConvertCMYKToRGB(PixelInfo *pixel)
31 {
32 pixel->red=((QuantumRange-(QuantumScale*pixel->red*(QuantumRange-
33 pixel->black)+pixel->black)));
34 pixel->green=((QuantumRange-(QuantumScale*pixel->green*(QuantumRange-
35 pixel->black)+pixel->black)));
36 pixel->blue=((QuantumRange-(QuantumScale*pixel->blue*(QuantumRange-
37 pixel->black)+pixel->black)));
38 }
39
ConvertRGBToCMYK(PixelInfo * pixel)40 static inline void ConvertRGBToCMYK(PixelInfo *pixel)
41 {
42 MagickRealType
43 black,
44 blue,
45 cyan,
46 green,
47 magenta,
48 red,
49 yellow;
50
51 if (pixel->colorspace != sRGBColorspace)
52 {
53 red=QuantumScale*pixel->red;
54 green=QuantumScale*pixel->green;
55 blue=QuantumScale*pixel->blue;
56 }
57 else
58 {
59 red=QuantumScale*DecodePixelGamma(pixel->red);
60 green=QuantumScale*DecodePixelGamma(pixel->green);
61 blue=QuantumScale*DecodePixelGamma(pixel->blue);
62 }
63 if ((fabs((double) red) < MagickEpsilon) &&
64 (fabs((double) green) < MagickEpsilon) &&
65 (fabs((double) blue) < MagickEpsilon))
66 {
67 pixel->black=(MagickRealType) QuantumRange;
68 return;
69 }
70 cyan=(MagickRealType) (1.0-red);
71 magenta=(MagickRealType) (1.0-green);
72 yellow=(MagickRealType) (1.0-blue);
73 black=cyan;
74 if (magenta < black)
75 black=magenta;
76 if (yellow < black)
77 black=yellow;
78 cyan=(MagickRealType) ((cyan-black)/(1.0-black));
79 magenta=(MagickRealType) ((magenta-black)/(1.0-black));
80 yellow=(MagickRealType) ((yellow-black)/(1.0-black));
81 pixel->colorspace=CMYKColorspace;
82 pixel->red=QuantumRange*cyan;
83 pixel->green=QuantumRange*magenta;
84 pixel->blue=QuantumRange*yellow;
85 pixel->black=QuantumRange*black;
86 }
87
IsCMYKColorspace(const ColorspaceType colorspace)88 static inline MagickBooleanType IsCMYKColorspace(
89 const ColorspaceType colorspace)
90 {
91 if (colorspace == CMYKColorspace)
92 return(MagickTrue);
93 return(MagickFalse);
94 }
95
IsGrayColorspace(const ColorspaceType colorspace)96 static inline MagickBooleanType IsGrayColorspace(
97 const ColorspaceType colorspace)
98 {
99 if ((colorspace == LinearGRAYColorspace) || (colorspace == GRAYColorspace))
100 return(MagickTrue);
101 return(MagickFalse);
102 }
103
IsRGBColorspace(const ColorspaceType colorspace)104 static inline MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
105 {
106 if ((colorspace == RGBColorspace) || (colorspace == scRGBColorspace))
107 return(MagickTrue);
108 return(MagickFalse);
109 }
110
IssRGBColorspace(const ColorspaceType colorspace)111 static inline MagickBooleanType IssRGBColorspace(
112 const ColorspaceType colorspace)
113 {
114 if ((colorspace == sRGBColorspace) || (colorspace == TransparentColorspace))
115 return(MagickTrue);
116 return(MagickFalse);
117 }
118
IssRGBCompatibleColorspace(const ColorspaceType colorspace)119 static inline MagickBooleanType IssRGBCompatibleColorspace(
120 const ColorspaceType colorspace)
121 {
122 if ((colorspace == sRGBColorspace) || (colorspace == RGBColorspace) ||
123 (colorspace == scRGBColorspace) || (colorspace == GRAYColorspace) ||
124 (colorspace == LinearGRAYColorspace))
125 return(MagickTrue);
126 return(MagickFalse);
127 }
128
129 #if defined(__cplusplus) || defined(c_plusplus)
130 }
131 #endif
132
133 #endif
134