MagickCore  6.9.11-60
Convert, Edit, Or Compose Bitmap Images
colorspace-private.h
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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
static MagickBooleanType IssRGBColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:124
static MagickBooleanType IsGrayColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:96
static MagickBooleanType IsHueCompatibleColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:106
static MagickBooleanType IsYCbCrCompatibleColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:143
static MagickBooleanType IsCMYKColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:88
static void ConvertRGBToCMYK(MagickPixelPacket *pixel)
Definition: colorspace-private.h:40
static void ConvertCMYKToRGB(MagickPixelPacket *pixel)
Definition: colorspace-private.h:30
static MagickBooleanType IssRGBCompatibleColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:132
static MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:116
ColorspaceType
Definition: colorspace.h:26
@ Rec601LumaColorspace
Definition: colorspace.h:44
@ Rec601YCbCrColorspace
Definition: colorspace.h:45
@ HSLColorspace
Definition: colorspace.h:42
@ YCbCrColorspace
Definition: colorspace.h:34
@ scRGBColorspace
Definition: colorspace.h:56
@ HSIColorspace
Definition: colorspace.h:57
@ HSBColorspace
Definition: colorspace.h:41
@ HCLColorspace
Definition: colorspace.h:51
@ HCLpColorspace
Definition: colorspace.h:59
@ RGBColorspace
Definition: colorspace.h:28
@ CMYKColorspace
Definition: colorspace.h:39
@ Rec709LumaColorspace
Definition: colorspace.h:46
@ Rec709YCbCrColorspace
Definition: colorspace.h:47
@ GRAYColorspace
Definition: colorspace.h:29
@ HSVColorspace
Definition: colorspace.h:58
@ TransparentColorspace
Definition: colorspace.h:30
@ sRGBColorspace
Definition: colorspace.h:40
@ LinearGRAYColorspace
Definition: colorspace.h:62
MagickDoubleType MagickRealType
Definition: magick-type.h:129
#define QuantumRange
Definition: magick-type.h:90
#define MagickEpsilon
Definition: magick-type.h:119
MagickBooleanType
Definition: magick-type.h:203
@ MagickFalse
Definition: magick-type.h:204
@ MagickTrue
Definition: magick-type.h:205
#define QuantumScale
Definition: magick-type.h:124
static double PerceptibleReciprocal(const double x)
Definition: pixel-accessor.h:124
MagickExport MagickRealType DecodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:246
Definition: pixel.h:105
ColorspaceType colorspace
Definition: pixel.h:110
MagickRealType blue
Definition: pixel.h:124
MagickRealType index
Definition: pixel.h:126
MagickRealType green
Definition: pixel.h:123
MagickRealType red
Definition: pixel.h:122