MagickCore  6.9.12-43
Convert, Edit, Or Compose Bitmap Images
colorspace-private.h
Go to the documentation of this file.
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)));
35  pixel->index)+pixel->index)));
37  pixel->index)+pixel->index)));
38 }
39 
40 static inline void ConvertRGBToCMYK(MagickPixelPacket *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->index=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  (colorspace == Rec601LumaColorspace) ||
101  (colorspace == Rec709LumaColorspace))
102  return(MagickTrue);
103  return(MagickFalse);
104 }
105 
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 
125  const ColorspaceType colorspace)
126 {
127  if ((colorspace == sRGBColorspace) || (colorspace == TransparentColorspace))
128  return(MagickTrue);
129  return(MagickFalse);
130 }
131 
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 
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
Definition: colorspace.h:44
MagickDoubleType MagickRealType
Definition: magick-type.h:125
ColorspaceType colorspace
Definition: pixel.h:110
static void ConvertCMYKToRGB(MagickPixelPacket *pixel)
Definition: colorspace-private.h:30
Definition: colorspace.h:40
Definition: colorspace.h:45
Definition: colorspace.h:59
Definition: colorspace.h:41
Definition: colorspace.h:58
static MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:116
static MagickBooleanType IsGrayColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:96
Definition: colorspace.h:47
#define MagickEpsilon
Definition: magick-type.h:115
MagickExport MagickRealType DecodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:246
static MagickBooleanType IsCMYKColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:88
static MagickBooleanType IsHueCompatibleColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:106
Definition: colorspace.h:34
Definition: colorspace.h:57
MagickBooleanType
Definition: magick-type.h:198
static double PerceptibleReciprocal(const double x)
Definition: pixel-accessor.h:124
static MagickBooleanType IssRGBCompatibleColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:132
Definition: pixel.h:104
Definition: colorspace.h:30
Definition: magick-type.h:201
static MagickBooleanType IssRGBColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:124
#define QuantumScale
Definition: magick-type.h:120
static void ConvertRGBToCMYK(MagickPixelPacket *pixel)
Definition: colorspace-private.h:40
Definition: colorspace.h:39
MagickRealType red
Definition: pixel.h:122
Definition: colorspace.h:46
Definition: magick-type.h:200
Definition: colorspace.h:28
MagickRealType green
Definition: pixel.h:122
Definition: colorspace.h:56
ColorspaceType
Definition: colorspace.h:25
Definition: colorspace.h:29
Definition: colorspace.h:42
Definition: colorspace.h:51
MagickRealType blue
Definition: pixel.h:122
Definition: colorspace.h:62
static MagickBooleanType IsYCbCrCompatibleColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:143
MagickRealType index
Definition: pixel.h:122
#define QuantumRange
Definition: magick-type.h:86