MagickCore  6.8.9
colorspace-private.h
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1 /*
2  Copyright 1999-2014 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 ConvertRGBToCMYK(MagickPixelPacket *pixel)
31 {
33  black,
34  blue,
35  cyan,
36  green,
37  magenta,
38  red,
39  yellow;
40 
41  if (pixel->colorspace != sRGBColorspace)
42  {
43  red=QuantumScale*pixel->red;
44  green=QuantumScale*pixel->green;
45  blue=QuantumScale*pixel->blue;
46  }
47  else
48  {
49  red=DecodePixelGamma(pixel->red);
50  green=DecodePixelGamma(pixel->green);
51  blue=DecodePixelGamma(pixel->blue);
52  }
53  if ((fabs(red) < MagickEpsilon) && (fabs(green) < MagickEpsilon) &&
54  (fabs(blue) < MagickEpsilon))
55  {
57  return;
58  }
59  cyan=(MagickRealType) (1.0-red);
60  magenta=(MagickRealType) (1.0-green);
61  yellow=(MagickRealType) (1.0-blue);
62  black=cyan;
63  if (magenta < black)
64  black=magenta;
65  if (yellow < black)
66  black=yellow;
67  cyan=(MagickRealType) ((cyan-black)/(1.0-black));
68  magenta=(MagickRealType) ((magenta-black)/(1.0-black));
69  yellow=(MagickRealType) ((yellow-black)/(1.0-black));
71  pixel->red=QuantumRange*cyan;
72  pixel->green=QuantumRange*magenta;
73  pixel->blue=QuantumRange*yellow;
74  pixel->index=QuantumRange*black;
75 }
76 
78  const ColorspaceType colorspace)
79 {
80  if (colorspace == CMYKColorspace)
81  return(MagickTrue);
82  return(MagickFalse);
83 }
84 
86  const ColorspaceType colorspace)
87 {
88  if ((colorspace == GRAYColorspace) || (colorspace == Rec601LumaColorspace) ||
89  (colorspace == Rec709LumaColorspace))
90  return(MagickTrue);
91  return(MagickFalse);
92 }
93 
94 static inline MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
95 {
96  if ((colorspace == RGBColorspace) || (colorspace == scRGBColorspace))
97  return(MagickTrue);
98  return(MagickFalse);
99 }
100 
102  const ColorspaceType colorspace)
103 {
104  if ((colorspace == sRGBColorspace) || (colorspace == TransparentColorspace))
105  return(MagickTrue);
106  return(MagickFalse);
107 }
108 
110  const ColorspaceType colorspace)
111 {
112  if ((colorspace == sRGBColorspace) || (colorspace == RGBColorspace) ||
113  (colorspace == scRGBColorspace) ||
114  (colorspace == TransparentColorspace) ||
115  (IsGrayColorspace(colorspace) != MagickFalse))
116  return(MagickTrue);
117  return(MagickFalse);
118 }
119 
120 #if defined(__cplusplus) || defined(c_plusplus)
121 }
122 #endif
123 
124 #endif
Definition: colorspace.h:44
ColorspaceType colorspace
Definition: pixel.h:110
Definition: colorspace.h:40
static MagickBooleanType IsRGBColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:94
static MagickBooleanType IsGrayColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:85
float MagickRealType
Definition: magick-type.h:76
#define MagickEpsilon
Definition: magick-type.h:139
MagickExport MagickRealType DecodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:187
static MagickBooleanType IsCMYKColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:77
MagickBooleanType
Definition: magick-type.h:211
static MagickBooleanType IssRGBCompatibleColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:109
Definition: pixel.h:104
Definition: colorspace.h:30
Definition: magick-type.h:214
static MagickBooleanType IssRGBColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:101
#define QuantumScale
Definition: magick-type.h:142
static void ConvertRGBToCMYK(MagickPixelPacket *pixel)
Definition: colorspace-private.h:30
Definition: colorspace.h:39
MagickRealType red
Definition: pixel.h:122
Definition: colorspace.h:46
Definition: magick-type.h:213
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:94