MagickCore  6.8.5
colorspace-private.h
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1 /*
2  Copyright 1999-2013 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 #if defined(__cplusplus) || defined(c_plusplus)
22 extern "C" {
23 #endif
24 
25 #include "magick/image.h"
26 #include "magick/image-private.h"
27 #include "magick/pixel.h"
28 #include "magick/pixel-accessor.h"
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) || (colorspace == GRAYColorspace) ||
114  (colorspace == TransparentColorspace))
115  return(MagickTrue);
116  return(MagickFalse);
117 }
118 
119 #if defined(__cplusplus) || defined(c_plusplus)
120 }
121 #endif
122 
123 #endif