MagickCore  6.9.10
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.
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) ((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 == 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  return(MagickTrue);
110  return(MagickFalse);
111 }
112 
114  const ColorspaceType colorspace)
115 {
116  if ((colorspace == sRGBColorspace) || (colorspace == TransparentColorspace))
117  return(MagickTrue);
118  return(MagickFalse);
119 }
120 
122  const ColorspaceType colorspace)
123 {
124  if ((colorspace == sRGBColorspace) || (colorspace == RGBColorspace) ||
125  (colorspace == scRGBColorspace) || (colorspace == TransparentColorspace) ||
126  (colorspace == GRAYColorspace) || (colorspace == LinearGRAYColorspace))
127  return(MagickTrue);
128  return(MagickFalse);
129 }
130 
131 #if defined(__cplusplus) || defined(c_plusplus)
132 }
133 #endif
134 
135 #endif
QuantumScale
#define QuantumScale
Definition: magick-type.h:120
_MagickPixelPacket::red
MagickRealType red
Definition: pixel.h:122
IssRGBCompatibleColorspace
static MagickBooleanType IssRGBCompatibleColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:121
image-private.h
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:113
MagickTrue
@ MagickTrue
Definition: magick-type.h:194
_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:104
DecodePixelGamma
MagickExport MagickRealType DecodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:255
ColorspaceType
ColorspaceType
Definition: colorspace.h:25
MagickFalse
@ MagickFalse
Definition: magick-type.h:193
image.h
TransparentColorspace
@ TransparentColorspace
Definition: colorspace.h:30
IsCMYKColorspace
static MagickBooleanType IsCMYKColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:88
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:191
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
MagickEpsilon
#define MagickEpsilon
Definition: magick-type.h:115
pixel-accessor.h
Rec601LumaColorspace
@ Rec601LumaColorspace
Definition: colorspace.h:44
scRGBColorspace
@ scRGBColorspace
Definition: colorspace.h:56
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:106
IsGrayColorspace
static MagickBooleanType IsGrayColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:96