MagickCore  7.0.8
Convert, Edit, Or Compose Bitmap Images
colorspace-private.h
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1 /*
2  Copyright 1999-2019 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 
104 static inline MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
105 {
106  if ((colorspace == RGBColorspace) || (colorspace == scRGBColorspace) ||
107  (colorspace == LinearGRAYColorspace))
108  return(MagickTrue);
109  return(MagickFalse);
110 }
111 
113  const ColorspaceType colorspace)
114 {
115  if ((colorspace == sRGBColorspace) || (colorspace == TransparentColorspace))
116  return(MagickTrue);
117  return(MagickFalse);
118 }
119 
121  const ColorspaceType colorspace)
122 {
123  if ((colorspace == sRGBColorspace) || (colorspace == RGBColorspace) ||
124  (colorspace == scRGBColorspace) || (colorspace == TransparentColorspace) ||
125  (colorspace == GRAYColorspace) || (colorspace == LinearGRAYColorspace))
126  return(MagickTrue);
127  return(MagickFalse);
128 }
129 
130 #if defined(__cplusplus) || defined(c_plusplus)
131 }
132 #endif
133 
134 #endif
MagickDoubleType MagickRealType
Definition: magick-type.h:120
Definition: colorspace.h:50
MagickRealType red
Definition: pixel.h:190
static MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:104
static MagickBooleanType IsGrayColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:96
#define MagickEpsilon
Definition: magick-type.h:110
MagickExport MagickRealType DecodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:319
static MagickBooleanType IsCMYKColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:88
MagickBooleanType
Definition: magick-type.h:158
static double PerceptibleReciprocal(const double x)
Definition: pixel-accessor.h:224
static MagickBooleanType IssRGBCompatibleColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:120
Definition: colorspace.h:51
Definition: magick-type.h:161
MagickRealType blue
Definition: pixel.h:190
static MagickBooleanType IssRGBColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:112
static void ConvertRGBToCMYK(PixelInfo *pixel)
Definition: colorspace-private.h:40
#define QuantumScale
Definition: magick-type.h:115
Definition: colorspace.h:29
Definition: magick-type.h:160
Definition: colorspace.h:48
MagickRealType black
Definition: pixel.h:190
Definition: colorspace.h:49
ColorspaceType
Definition: colorspace.h:25
Definition: colorspace.h:30
MagickRealType green
Definition: pixel.h:190
Definition: colorspace.h:60
ColorspaceType colorspace
Definition: pixel.h:175
Definition: pixel.h:169
static void ConvertCMYKToRGB(PixelInfo *pixel)
Definition: colorspace-private.h:30
#define QuantumRange
Definition: magick-type.h:83