MagickCore  6.9.11
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 
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) || (colorspace == TransparentColorspace) ||
137  (colorspace == GRAYColorspace) || (colorspace == LinearGRAYColorspace))
138  return(MagickTrue);
139  return(MagickFalse);
140 }
141 
142 #if defined(__cplusplus) || defined(c_plusplus)
143 }
144 #endif
145 
146 #endif
QuantumScale
#define QuantumScale
Definition: magick-type.h:120
_MagickPixelPacket::red
MagickRealType red
Definition: pixel.h:122
IsHueCompatibleColorspace
static MagickBooleanType IsHueCompatibleColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:106
IssRGBCompatibleColorspace
static MagickBooleanType IssRGBCompatibleColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:132
image-private.h
HCLpColorspace
@ HCLpColorspace
Definition: colorspace.h:59
HSBColorspace
@ HSBColorspace
Definition: colorspace.h:41
ConvertRGBToCMYK
static void ConvertRGBToCMYK(MagickPixelPacket *pixel)
Definition: colorspace-private.h:40
sRGBColorspace
@ sRGBColorspace
Definition: colorspace.h:40
pixel.h
IssRGBColorspace
static MagickBooleanType IssRGBColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:124
HSVColorspace
@ HSVColorspace
Definition: colorspace.h:58
HSIColorspace
@ HSIColorspace
Definition: colorspace.h:57
MagickTrue
@ MagickTrue
Definition: magick-type.h:201
_MagickPixelPacket::index
MagickRealType index
Definition: pixel.h:126
_MagickPixelPacket::blue
MagickRealType blue
Definition: pixel.h:124
_MagickPixelPacket::colorspace
ColorspaceType colorspace
Definition: pixel.h:110
_MagickPixelPacket
Definition: pixel.h:105
DecodePixelGamma
MagickExport MagickRealType DecodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:246
ColorspaceType
ColorspaceType
Definition: colorspace.h:26
MagickFalse
@ MagickFalse
Definition: magick-type.h:200
image.h
TransparentColorspace
@ TransparentColorspace
Definition: colorspace.h:30
IsCMYKColorspace
static MagickBooleanType IsCMYKColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:88
PerceptibleReciprocal
static double PerceptibleReciprocal(const double x)
Definition: pixel-accessor.h:124
QuantumRange
#define QuantumRange
Definition: magick-type.h:86
CMYKColorspace
@ CMYKColorspace
Definition: colorspace.h:39
Rec709LumaColorspace
@ Rec709LumaColorspace
Definition: colorspace.h:46
MagickBooleanType
MagickBooleanType
Definition: magick-type.h:199
LinearGRAYColorspace
@ LinearGRAYColorspace
Definition: colorspace.h:62
ConvertCMYKToRGB
static void ConvertCMYKToRGB(MagickPixelPacket *pixel)
Definition: colorspace-private.h:30
MagickRealType
MagickDoubleType MagickRealType
Definition: magick-type.h:125
GRAYColorspace
@ GRAYColorspace
Definition: colorspace.h:29
HCLColorspace
@ HCLColorspace
Definition: colorspace.h:51
MagickEpsilon
#define MagickEpsilon
Definition: magick-type.h:115
pixel-accessor.h
Rec601LumaColorspace
@ Rec601LumaColorspace
Definition: colorspace.h:44
scRGBColorspace
@ scRGBColorspace
Definition: colorspace.h:56
HSLColorspace
@ HSLColorspace
Definition: colorspace.h:42
RGBColorspace
@ RGBColorspace
Definition: colorspace.h:28
_MagickPixelPacket::green
MagickRealType green
Definition: pixel.h:123
IsRGBColorspace
static MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:116
IsGrayColorspace
static MagickBooleanType IsGrayColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:96