MagickCore  6.9.10
Convert, Edit, Or Compose Bitmap Images
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 "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 
106 static inline MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
107 {
108  if ((colorspace == RGBColorspace) || (colorspace == scRGBColorspace) ||
109  (colorspace == LinearGRAYColorspace))
110  return(MagickTrue);
111  return(MagickFalse);
112 }
113 
115  const ColorspaceType colorspace)
116 {
117  if ((colorspace == sRGBColorspace) || (colorspace == TransparentColorspace))
118  return(MagickTrue);
119  return(MagickFalse);
120 }
121 
123  const ColorspaceType colorspace)
124 {
125  if ((colorspace == sRGBColorspace) || (colorspace == RGBColorspace) ||
126  (colorspace == scRGBColorspace) || (colorspace == TransparentColorspace) ||
127  (colorspace == GRAYColorspace) || (colorspace == LinearGRAYColorspace))
128  return(MagickTrue);
129  return(MagickFalse);
130 }
131 
132 #if defined(__cplusplus) || defined(c_plusplus)
133 }
134 #endif
135 
136 #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
static MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:106
static MagickBooleanType IsGrayColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:96
#define MagickEpsilon
Definition: magick-type.h:115
MagickExport MagickRealType DecodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:255
static MagickBooleanType IsCMYKColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:88
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:122
Definition: pixel.h:104
Definition: colorspace.h:30
Definition: magick-type.h:201
static MagickBooleanType IssRGBColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:114
#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
MagickRealType blue
Definition: pixel.h:122
Definition: colorspace.h:62
MagickRealType index
Definition: pixel.h:122
#define QuantumRange
Definition: magick-type.h:86