MagickCore  7.0.7
Convert, Edit, Or Compose Bitmap Images
colorspace-private.h
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1 /*
2  Copyright 1999-2018 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.
6  obtain a copy of the License at
7 
8  https://www.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) ((cyan-black)/(1.0-black));
79  magenta=(MagickRealType) ((magenta-black)/(1.0-black));
80  yellow=(MagickRealType) ((yellow-black)/(1.0-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 == 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  return(MagickTrue);
108  return(MagickFalse);
109 }
110 
112  const ColorspaceType colorspace)
113 {
114  if ((colorspace == sRGBColorspace) || (colorspace == TransparentColorspace))
115  return(MagickTrue);
116  return(MagickFalse);
117 }
118 
120  const ColorspaceType colorspace)
121 {
122  if ((colorspace == sRGBColorspace) || (colorspace == RGBColorspace) ||
123  (colorspace == scRGBColorspace) ||
124  (IsGrayColorspace(colorspace) != MagickFalse))
125  return(MagickTrue);
126  return(MagickFalse);
127 }
128 
129 #if defined(__cplusplus) || defined(c_plusplus)
130 }
131 #endif
132 
133 #endif
MagickDoubleType MagickRealType
Definition: magick-type.h:118
MagickRealType red
Definition: pixel.h:188
static MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
static MagickBooleanType IsGrayColorspace(const ColorspaceType colorspace)
#define MagickEpsilon
Definition: magick-type.h:110
MagickExport MagickRealType DecodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:319
static MagickBooleanType IsCMYKColorspace(const ColorspaceType colorspace)
MagickBooleanType
Definition: magick-type.h:156
static MagickBooleanType IssRGBCompatibleColorspace(const ColorspaceType colorspace)
MagickRealType blue
Definition: pixel.h:188
static MagickBooleanType IssRGBColorspace(const ColorspaceType colorspace)
static void ConvertRGBToCMYK(PixelInfo *pixel)
#define QuantumScale
Definition: magick-type.h:113
MagickRealType black
Definition: pixel.h:188
ColorspaceType
Definition: colorspace.h:25
MagickRealType green
Definition: pixel.h:188
ColorspaceType colorspace
Definition: pixel.h:173
static void ConvertCMYKToRGB(PixelInfo *pixel)
#define QuantumRange
Definition: magick-type.h:83