MagickCore  6.9.7
colorspace-private.h
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1 /*
2  Copyright 1999-2017 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  http://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 "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) ((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->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 == GRAYColorspace) || (colorspace == Rec601LumaColorspace) ||
100  (colorspace == Rec709LumaColorspace))
101  return(MagickTrue);
102  return(MagickFalse);
103 }
104 
105 static inline MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
106 {
107  if ((colorspace == RGBColorspace) || (colorspace == scRGBColorspace))
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) ||
125  (colorspace == TransparentColorspace) ||
126  (IsGrayColorspace(colorspace) != MagickFalse))
127  return(MagickTrue);
128  return(MagickFalse);
129 }
130 
131 #if defined(__cplusplus) || defined(c_plusplus)
132 }
133 #endif
134 
135 #endif
Definition: colorspace.h:44
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:105
static MagickBooleanType IsGrayColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:96
float MagickRealType
Definition: magick-type.h:80
#define MagickEpsilon
Definition: magick-type.h:143
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:215
static MagickBooleanType IssRGBCompatibleColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:120
Definition: pixel.h:104
Definition: colorspace.h:30
Definition: magick-type.h:218
static MagickBooleanType IssRGBColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:112
#define QuantumScale
Definition: magick-type.h:146
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:217
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
MagickRealType index
Definition: pixel.h:122
#define QuantumRange
Definition: magick-type.h:98