MagickCore  7.0.10
colorspace-private.h
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1 /*
2  Copyright 1999-2020 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"
23 #include "MagickCore/pixel.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)));
35  pixel->black)+pixel->black)));
37  pixel->black)+pixel->black)));
38 }
39 
40 static inline void ConvertRGBToCMYK(PixelInfo *pixel)
41 {
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  {
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));
82  pixel->red=QuantumRange*cyan;
83  pixel->green=QuantumRange*magenta;
84  pixel->blue=QuantumRange*yellow;
85  pixel->black=QuantumRange*black;
86 }
87 
89  const ColorspaceType colorspace)
90 {
91  if (colorspace == CMYKColorspace)
92  return(MagickTrue);
93  return(MagickFalse);
94 }
95 
97  const ColorspaceType colorspace)
98 {
99  if ((colorspace == LinearGRAYColorspace) || (colorspace == GRAYColorspace))
100  return(MagickTrue);
101  return(MagickFalse);
102 }
103 
105  const ColorspaceType colorspace)
106 {
107  if ((colorspace == HCLColorspace) || (colorspace == HCLpColorspace) ||
108  (colorspace == HSBColorspace) || (colorspace == HSIColorspace) ||
109  (colorspace == HSLColorspace) || (colorspace == HSVColorspace))
110  return(MagickTrue);
111  return(MagickFalse);
112 }
113 
114 static inline MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
115 {
116  if ((colorspace == RGBColorspace) || (colorspace == scRGBColorspace) ||
117  (colorspace == LinearGRAYColorspace))
118  return(MagickTrue);
119  return(MagickFalse);
120 }
121 
123  const ColorspaceType colorspace)
124 {
125  if ((colorspace == sRGBColorspace) || (colorspace == TransparentColorspace))
126  return(MagickTrue);
127  return(MagickFalse);
128 }
129 
131  const ColorspaceType colorspace)
132 {
133  if ((colorspace == sRGBColorspace) || (colorspace == RGBColorspace) ||
134  (colorspace == scRGBColorspace) || (colorspace == TransparentColorspace) ||
135  (colorspace == GRAYColorspace) || (colorspace == LinearGRAYColorspace))
136  return(MagickTrue);
137  return(MagickFalse);
138 }
139 
140 #if defined(__cplusplus) || defined(c_plusplus)
141 }
142 #endif
143 
144 #endif
MagickDoubleType MagickRealType
Definition: magick-type.h:124
MagickRealType red
Definition: pixel.h:190
static MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
static MagickBooleanType IsGrayColorspace(const ColorspaceType colorspace)
#define MagickEpsilon
Definition: magick-type.h:114
MagickExport MagickRealType DecodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:319
static MagickBooleanType IsCMYKColorspace(const ColorspaceType colorspace)
static MagickBooleanType IsHueCompatibleColorspace(const ColorspaceType colorspace)
MagickBooleanType
Definition: magick-type.h:169
static double PerceptibleReciprocal(const double x)
static MagickBooleanType IssRGBCompatibleColorspace(const ColorspaceType colorspace)
MagickRealType blue
Definition: pixel.h:190
static MagickBooleanType IssRGBColorspace(const ColorspaceType colorspace)
static void ConvertRGBToCMYK(PixelInfo *pixel)
#define QuantumScale
Definition: magick-type.h:119
MagickRealType black
Definition: pixel.h:190
ColorspaceType
Definition: colorspace.h:25
MagickRealType green
Definition: pixel.h:190
ColorspaceType colorspace
Definition: pixel.h:175
static void ConvertCMYKToRGB(PixelInfo *pixel)
#define QuantumRange
Definition: magick-type.h:87