MagickCore  6.8.9
pixel-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 pixel private methods.
17 */
18 #ifndef _MAGICKCORE_PIXEL_PRIVATE_H
19 #define _MAGICKCORE_PIXEL_PRIVATE_H
20 
21 #include "magick/image.h"
22 #include "magick/color.h"
23 #include "magick/image-private.h"
24 #include "magick/memory_.h"
25 #include "magick/pixel-accessor.h"
26 #include "magick/quantum-private.h"
27 
28 #if defined(__cplusplus) || defined(c_plusplus)
29 extern "C" {
30 #endif
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
MagickRealType opacity
Definition: pixel.h:122
#define GetPixelBlue(pixel)
Definition: pixel-accessor.h:38
#define GetPixelOpacity(pixel)
Definition: pixel-accessor.h:49
#define GetPixelGreen(pixel)
Definition: pixel-accessor.h:43
float MagickRealType
Definition: magick-type.h:79
Definition: pixel.h:131
double bias
Definition: image.h:218
#define MagickEpsilon
Definition: magick-type.h:142
ClassType storage_class
Definition: image.h:155
#define GetPixelRed(pixel)
Definition: pixel-accessor.h:50
Definition: image.h:152
#define SetPixelGreen(pixel, value)
Definition: pixel-accessor.h:77
MagickBooleanType
Definition: magick-type.h:214
static MagickBooleanType IsMonochromePixel(const PixelPacket *pixel)
Definition: pixel-private.h:53
Definition: pixel.h:104
Definition: magick-type.h:217
static MagickBooleanType IsGrayPixel(const PixelPacket *pixel)
Definition: pixel-private.h:32
#define SetPixelRed(pixel, value)
Definition: pixel-accessor.h:87
Definition: colorspace.h:39
#define GetPixelIndex(indexes)
Definition: pixel-accessor.h:44
#define SetPixelOpacity(pixel, value)
Definition: pixel-accessor.h:85
static void SetMagickPixelPacket(const Image *image, const PixelPacket *color, const IndexPacket *index, MagickPixelPacket *pixel)
Definition: pixel-private.h:92
MagickRealType red
Definition: pixel.h:122
static Quantum ClampToQuantum(const MagickRealType value)
Definition: quantum.h:88
Definition: magick-type.h:216
MagickRealType green
Definition: pixel.h:122
#define SetPixelIndex(indexes, value)
Definition: pixel-accessor.h:78
static void SetPixelPacket(const Image *image, const MagickPixelPacket *pixel, PixelPacket *color, IndexPacket *index)
Definition: pixel-private.h:117
MagickRealType blue
Definition: pixel.h:122
static void SetMagickPixelPacketBias(const Image *image, MagickPixelPacket *pixel)
Definition: pixel-private.h:104
Definition: magick-type.h:211
Quantum IndexPacket
Definition: pixel.h:129
static double PerceptibleReciprocal(const double x)
Definition: pixel-private.h:78
#define SetPixelBlue(pixel, value)
Definition: pixel-accessor.h:71
MagickRealType index
Definition: pixel.h:122
ColorspaceType colorspace
Definition: image.h:158
#define QuantumRange
Definition: magick-type.h:97