MagickCore  7.1.0
Convert, Edit, Or Compose Bitmap Images
colorspace-private.h
1 /*
2  Copyright @ 1999 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 
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 
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) (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->black=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  return(MagickTrue);
101  return(MagickFalse);
102 }
103 
104 static inline MagickBooleanType IsGrayImageType(const ImageType type)
105 {
106  if ((type == GrayscaleType) || (type == GrayscaleAlphaType) ||
107  (type == BilevelType))
108  return(MagickTrue);
109  return(MagickFalse);
110 }
111 
112 static inline MagickBooleanType IsHueCompatibleColorspace(
113  const ColorspaceType colorspace)
114 {
115  if ((colorspace == HCLColorspace) || (colorspace == HCLpColorspace) ||
116  (colorspace == HSBColorspace) || (colorspace == HSIColorspace) ||
117  (colorspace == HSLColorspace) || (colorspace == HSVColorspace))
118  return(MagickTrue);
119  return(MagickFalse);
120 }
121 
122 static inline MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
123 {
124  if ((colorspace == RGBColorspace) || (colorspace == scRGBColorspace) ||
125  (colorspace == LinearGRAYColorspace))
126  return(MagickTrue);
127  return(MagickFalse);
128 }
129 
130 static inline MagickBooleanType IssRGBColorspace(
131  const ColorspaceType colorspace)
132 {
133  if ((colorspace == sRGBColorspace) || (colorspace == TransparentColorspace))
134  return(MagickTrue);
135  return(MagickFalse);
136 }
137 
138 static inline MagickBooleanType IssRGBCompatibleColorspace(
139  const ColorspaceType colorspace)
140 {
141  if ((colorspace == sRGBColorspace) || (colorspace == RGBColorspace) ||
142  (colorspace == Adobe98Colorspace) || (colorspace == ProPhotoColorspace) ||
143  (colorspace == DisplayP3Colorspace) || (colorspace == scRGBColorspace) ||
144  (colorspace == TransparentColorspace) || (colorspace == GRAYColorspace) ||
145  (colorspace == LinearGRAYColorspace))
146  return(MagickTrue);
147  return(MagickFalse);
148 }
149 
150 static inline MagickBooleanType IsYCbCrCompatibleColorspace(
151  const ColorspaceType colorspace)
152 {
153  if ((colorspace == YCbCrColorspace) ||
154  (colorspace == Rec709YCbCrColorspace) ||
155  (colorspace == Rec601YCbCrColorspace))
156  return(MagickTrue);
157  return(MagickFalse);
158 }
159 
160 #if defined(__cplusplus) || defined(c_plusplus)
161 }
162 #endif
163 
164 #endif