MagickCore  6.9.12-67
Convert, Edit, Or Compose Bitmap Images
 All Data Structures
colorspace-private.h
1 /*
2  Copyright 1999-2021 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 "magick/image.h"
22 #include "magick/image-private.h"
23 #include "magick/pixel.h"
24 #include "magick/pixel-accessor.h"
25 
26 #if defined(__cplusplus) || defined(c_plusplus)
27 extern "C" {
28 #endif
29 
30 static inline void ConvertCMYKToRGB(MagickPixelPacket *pixel)
31 {
32  pixel->red=((QuantumRange-(QuantumScale*pixel->red*(QuantumRange-
33  pixel->index)+pixel->index)));
34  pixel->green=((QuantumRange-(QuantumScale*pixel->green*(QuantumRange-
35  pixel->index)+pixel->index)));
36  pixel->blue=((QuantumRange-(QuantumScale*pixel->blue*(QuantumRange-
37  pixel->index)+pixel->index)));
38 }
39 
40 static inline void ConvertRGBToCMYK(MagickPixelPacket *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->index=(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) (PerceptibleReciprocal(1.0-black)*(cyan-black));
79  magenta=(MagickRealType) (PerceptibleReciprocal(1.0-black)*(magenta-black));
80  yellow=(MagickRealType) (PerceptibleReciprocal(1.0-black)*(yellow-black));
81  pixel->colorspace=CMYKColorspace;
82  pixel->red=QuantumRange*cyan;
83  pixel->green=QuantumRange*magenta;
84  pixel->blue=QuantumRange*yellow;
85  pixel->index=QuantumRange*black;
86 }
87 
88 static inline MagickBooleanType IsCMYKColorspace(
89  const ColorspaceType colorspace)
90 {
91  if (colorspace == CMYKColorspace)
92  return(MagickTrue);
93  return(MagickFalse);
94 }
95 
96 static inline MagickBooleanType IsGrayColorspace(
97  const ColorspaceType colorspace)
98 {
99  if ((colorspace == LinearGRAYColorspace) || (colorspace == GRAYColorspace) ||
100  (colorspace == Rec601LumaColorspace) ||
101  (colorspace == Rec709LumaColorspace))
102  return(MagickTrue);
103  return(MagickFalse);
104 }
105 
106 static inline MagickBooleanType IsHueCompatibleColorspace(
107  const ColorspaceType colorspace)
108 {
109  if ((colorspace == HCLColorspace) || (colorspace == HCLpColorspace) ||
110  (colorspace == HSBColorspace) || (colorspace == HSIColorspace) ||
111  (colorspace == HSLColorspace) || (colorspace == HSVColorspace))
112  return(MagickTrue);
113  return(MagickFalse);
114 }
115 
116 static inline MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
117 {
118  if ((colorspace == RGBColorspace) || (colorspace == scRGBColorspace) ||
119  (colorspace == LinearGRAYColorspace))
120  return(MagickTrue);
121  return(MagickFalse);
122 }
123 
124 static inline MagickBooleanType IssRGBColorspace(
125  const ColorspaceType colorspace)
126 {
127  if ((colorspace == sRGBColorspace) || (colorspace == TransparentColorspace))
128  return(MagickTrue);
129  return(MagickFalse);
130 }
131 
132 static inline MagickBooleanType IssRGBCompatibleColorspace(
133  const ColorspaceType colorspace)
134 {
135  if ((colorspace == sRGBColorspace) || (colorspace == RGBColorspace) ||
136  (colorspace == scRGBColorspace) ||
137  (colorspace == TransparentColorspace) || (colorspace == GRAYColorspace) ||
138  (colorspace == LinearGRAYColorspace))
139  return(MagickTrue);
140  return(MagickFalse);
141 }
142 
143 static inline MagickBooleanType IsYCbCrCompatibleColorspace(
144  const ColorspaceType colorspace)
145 {
146  if ((colorspace == YCbCrColorspace) ||
147  (colorspace == Rec709YCbCrColorspace) ||
148  (colorspace == Rec601YCbCrColorspace))
149  return(MagickTrue);
150  return(MagickFalse);
151 }
152 
153 #if defined(__cplusplus) || defined(c_plusplus)
154 }
155 #endif
156 
157 #endif