MagickCore  6.8.5
pixel-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 pixel private methods.
17 */
18 #ifndef _MAGICKCORE_PIXEL_PRIVATE_H
19 #define _MAGICKCORE_PIXEL_PRIVATE_H
20 
21 #if defined(__cplusplus) || defined(c_plusplus)
22 extern "C" {
23 #endif
24 
25 #include "magick/image.h"
26 #include "magick/color.h"
27 #include "magick/image-private.h"
28 #include "magick/memory_.h"
29 #include "magick/pixel-accessor.h"
30 #include "magick/quantum-private.h"
31 
32 static inline MagickBooleanType IsGrayPixel(const PixelPacket *pixel)
33 {
34 #if !defined(MAGICKCORE_HDRI_SUPPORT)
35  if ((GetPixelRed(pixel) == GetPixelGreen(pixel)) &&
36  (GetPixelGreen(pixel) == GetPixelBlue(pixel)))
37  return(MagickTrue);
38 #else
39  {
40  double
41  alpha,
42  beta;
43 
44  alpha=GetPixelRed(pixel)-(double) GetPixelGreen(pixel);
45  beta=GetPixelGreen(pixel)-(double) GetPixelBlue(pixel);
46  if ((fabs(alpha) <= MagickEpsilon) && (fabs(beta) <= MagickEpsilon))
47  return(MagickTrue);
48  }
49 #endif
50  return(MagickFalse);
51 }
52 
53 static inline MagickBooleanType IsMonochromePixel(const PixelPacket *pixel)
54 {
55 #if !defined(MAGICKCORE_HDRI_SUPPORT)
56  if (((GetPixelRed(pixel) == 0) ||
57  (GetPixelRed(pixel) == QuantumRange)) &&
58  (GetPixelRed(pixel) == GetPixelGreen(pixel)) &&
59  (GetPixelGreen(pixel) == GetPixelBlue(pixel)))
60  return(MagickTrue);
61 #else
62  {
63  double
64  alpha,
65  beta;
66 
67  alpha=GetPixelRed(pixel)-(double) GetPixelGreen(pixel);
68  beta=GetPixelGreen(pixel)-(double) GetPixelBlue(pixel);
69  if (((fabs((double) GetPixelRed(pixel)) <= MagickEpsilon) ||
70  (fabs((double) GetPixelRed(pixel)-QuantumRange) <= MagickEpsilon)) &&
71  (fabs(alpha) <= MagickEpsilon) && (fabs(beta) <= MagickEpsilon))
72  return(MagickTrue);
73  }
74 #endif
75  return(MagickFalse);
76 }
77 
78 static inline double PerceptibleReciprocal(const double x)
79 {
80  double
81  sign;
82 
83  /*
84  Return 1/x where x is perceptible (not unlimited or infinitesimal).
85  */
86  sign=x < 0.0 ? -1.0 : 1.0;
87  if ((sign*x) >= MagickEpsilon)
88  return(1.0/x);
89  return(sign/MagickEpsilon);
90 }
91 
92 static inline void SetMagickPixelPacket(const Image *image,
93  const PixelPacket *color,const IndexPacket *index,MagickPixelPacket *pixel)
94 {
95  pixel->red=(MagickRealType) GetPixelRed(color);
96  pixel->green=(MagickRealType) GetPixelGreen(color);
97  pixel->blue=(MagickRealType) GetPixelBlue(color);
98  pixel->opacity=(MagickRealType) GetPixelOpacity(color);
99  if ((image->colorspace == CMYKColorspace) &&
100  (index != (const IndexPacket *) NULL))
101  pixel->index=(MagickRealType) GetPixelIndex(index);
102 }
103 
104 static inline void SetMagickPixelPacketBias(const Image *image,
105  MagickPixelPacket *pixel)
106 {
107  /*
108  Obsoleted by MorphologyApply().
109  */
110  pixel->red=image->bias;
111  pixel->green=image->bias;
112  pixel->blue=image->bias;
113  pixel->opacity=image->bias;
114  pixel->index=image->bias;
115 }
116 
117 static inline void SetPixelPacket(const Image *image,
118  const MagickPixelPacket *pixel,PixelPacket *color,IndexPacket *index)
119 {
120  SetPixelRed(color,ClampToQuantum(pixel->red));
121  SetPixelGreen(color,ClampToQuantum(pixel->green));
122  SetPixelBlue(color,ClampToQuantum(pixel->blue));
123  SetPixelOpacity(color,ClampToQuantum(pixel->opacity));
124  if ((image->colorspace == CMYKColorspace) ||
125  (image->storage_class == PseudoClass))
126  SetPixelIndex(index,ClampToQuantum(pixel->index));
127 }
128 
129 #if defined(__cplusplus) || defined(c_plusplus)
130 }
131 #endif
132 
133 #endif