MagickCore  6.9.11
Convert, Edit, Or Compose Bitmap Images
color-private.h
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1 /*
2  Copyright 1999-2020 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. You may
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 color methods.
17 */
18 #ifndef MAGICKCORE_COLOR_PRIVATE_H
19 #define MAGICKCORE_COLOR_PRIVATE_H
20 
21 #include "magick/image.h"
22 #include "magick/image-private.h"
23 #include "magick/color.h"
26 #include "magick/pixel-accessor.h"
27 
28 #if defined(__cplusplus) || defined(c_plusplus)
29 extern "C" {
30 #endif
31 
33  IsIntensitySimilar(const Image *,const PixelPacket *,const PixelPacket *);
34 
35 static inline double GetFuzzyColorDistance(const Image *p,const Image *q)
36 {
37  double
38  fuzz;
39 
40  fuzz=(double) MagickMax(MagickMax(p->fuzz,q->fuzz),(MagickRealType)
41  MagickSQ1_2);
42  return(fuzz*fuzz);
43 }
44 
46  const PixelPacket *q)
47 {
49  blue,
50  green,
51  red;
52 
53  red=(MagickRealType) p->red;
54  green=(MagickRealType) p->green;
55  blue=(MagickRealType) p->blue;
56  if ((AbsolutePixelValue(red-q->red) < MagickEpsilon) &&
57  (AbsolutePixelValue(green-q->green) < MagickEpsilon) &&
59  return(MagickTrue);
60  return(MagickFalse);
61 }
62 
64  const MagickPixelPacket *q)
65 {
67  alpha,
68  beta;
69 
70  alpha=p->matte == MagickFalse ? OpaqueOpacity : p->opacity;
71  beta=q->matte == MagickFalse ? OpaqueOpacity : q->opacity;
72  if (AbsolutePixelValue(alpha-beta) >= MagickEpsilon)
73  return(MagickFalse);
76  return(MagickTrue); /* no color component if pixel is transparent */
78  return(MagickFalse);
80  return(MagickFalse);
82  return(MagickFalse);
83  if (p->colorspace == CMYKColorspace)
84  {
86  return(MagickFalse);
87  }
88  return(MagickTrue);
89 }
90 
92 {
94  return(MagickFalse);
95  if ((AbsolutePixelValue(pixel->red-pixel->green) < MagickEpsilon) &&
96  (AbsolutePixelValue(pixel->green-pixel->blue) < MagickEpsilon))
97  return(MagickTrue);
98  return(MagickFalse);
99 }
100 
102  const MagickPixelPacket *pixel)
103 {
104  if (IsGrayColorspace(pixel->colorspace) != MagickFalse)
105  return(pixel->red);
106  return(0.212656*pixel->red+0.715158*pixel->green+0.072186*pixel->blue);
107 }
108 
110  const MagickPixelPacket *pixel)
111 {
112  if (IsGrayColorspace(pixel->colorspace) != MagickFalse)
113  return(ClampToQuantum(pixel->red));
114  return(ClampToQuantum(0.212656*pixel->red+0.715158*pixel->green+
115  0.072186*pixel->blue));
116 }
117 
119 {
121  blue,
122  green,
123  red;
124 
125  if (IsGrayColorspace(pixel->colorspace) != MagickFalse)
126  return(pixel->red);
127  if (pixel->colorspace == sRGBColorspace)
128  return(0.212656*pixel->red+0.715158*pixel->green+0.072186*pixel->blue);
129  red=EncodePixelGamma(pixel->red);
130  green=EncodePixelGamma(pixel->green);
131  blue=EncodePixelGamma(pixel->blue);
132  return(0.212656*red+0.715158*green+0.072186*blue);
133 }
134 
136  const MagickPixelPacket *pixel)
137 {
139  blue,
140  green,
141  red;
142 
143  if (IsGrayColorspace(pixel->colorspace) != MagickFalse)
144  return(pixel->red);
145  if (pixel->colorspace != sRGBColorspace)
146  return(0.212656*pixel->red+0.715158*pixel->green+0.072186*pixel->blue);
147  red=DecodePixelGamma(pixel->red);
148  green=DecodePixelGamma(pixel->green);
149  blue=DecodePixelGamma(pixel->blue);
150  return(0.212656*red+0.715158*green+0.072186*blue);
151 }
152 
153 #if defined(__cplusplus) || defined(c_plusplus)
154 }
155 #endif
156 
157 #endif
MagickPixelIntensityToQuantum
static Quantum MagickPixelIntensityToQuantum(const MagickPixelPacket *pixel)
Definition: color-private.h:109
TransparentOpacity
#define TransparentOpacity
Definition: image.h:28
OpaqueOpacity
#define OpaqueOpacity
Definition: image.h:27
IsIntensitySimilar
MagickPrivate MagickBooleanType IsIntensitySimilar(const Image *, const PixelPacket *, const PixelPacket *)
Definition: color.c:1883
_MagickPixelPacket::red
MagickRealType red
Definition: pixel.h:122
MagickPixelIntensity
static MagickRealType MagickPixelIntensity(const MagickPixelPacket *pixel)
Definition: color-private.h:101
MagickSQ1_2
#define MagickSQ1_2
Definition: image-private.h:41
IssRGBCompatibleColorspace
static MagickBooleanType IssRGBCompatibleColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:132
image-private.h
sRGBColorspace
@ sRGBColorspace
Definition: colorspace.h:40
GetFuzzyColorDistance
static double GetFuzzyColorDistance(const Image *p, const Image *q)
Definition: color-private.h:35
_PixelPacket::blue
Quantum blue
Definition: pixel.h:143
EncodePixelGamma
MagickExport MagickRealType EncodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:342
MagickTrue
@ MagickTrue
Definition: magick-type.h:201
_MagickPixelPacket::index
MagickRealType index
Definition: pixel.h:126
_MagickPixelPacket::blue
MagickRealType blue
Definition: pixel.h:124
ClampToQuantum
static Quantum ClampToQuantum(const MagickRealType quantum)
Definition: quantum.h:88
_Image
Definition: image.h:153
_MagickPixelPacket::colorspace
ColorspaceType colorspace
Definition: pixel.h:110
_MagickPixelPacket
Definition: pixel.h:105
IsMagickGray
static MagickBooleanType IsMagickGray(const MagickPixelPacket *pixel)
Definition: color-private.h:91
MagickMax
#define MagickMax(x, y)
Definition: image-private.h:36
DecodePixelGamma
MagickExport MagickRealType DecodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:246
MagickPrivate
#define MagickPrivate
Definition: method-attribute.h:81
MagickFalse
@ MagickFalse
Definition: magick-type.h:200
image.h
_Image::fuzz
double fuzz
Definition: image.h:220
_PixelPacket::red
Quantum red
Definition: pixel.h:145
CMYKColorspace
@ CMYKColorspace
Definition: colorspace.h:39
_PixelPacket::green
Quantum green
Definition: pixel.h:144
MagickBooleanType
MagickBooleanType
Definition: magick-type.h:199
IsMagickColorEqual
static MagickBooleanType IsMagickColorEqual(const MagickPixelPacket *p, const MagickPixelPacket *q)
Definition: color-private.h:63
MagickRealType
MagickDoubleType MagickRealType
Definition: magick-type.h:125
MagickPixelLuma
static MagickRealType MagickPixelLuma(const MagickPixelPacket *pixel)
Definition: color-private.h:118
_MagickPixelPacket::matte
MagickBooleanType matte
Definition: pixel.h:113
color.h
MagickEpsilon
#define MagickEpsilon
Definition: magick-type.h:115
pixel-accessor.h
exception-private.h
MagickPixelLuminance
static MagickRealType MagickPixelLuminance(const MagickPixelPacket *pixel)
Definition: color-private.h:135
colorspace-private.h
AbsolutePixelValue
static MagickRealType AbsolutePixelValue(const MagickRealType x)
Definition: pixel-accessor.h:106
_MagickPixelPacket::opacity
MagickRealType opacity
Definition: pixel.h:125
_MagickPixelPacket::green
MagickRealType green
Definition: pixel.h:123
IsColorEqual
static MagickBooleanType IsColorEqual(const PixelPacket *p, const PixelPacket *q)
Definition: color-private.h:45
_PixelPacket
Definition: pixel.h:132
IsGrayColorspace
static MagickBooleanType IsGrayColorspace(const ColorspaceType colorspace)
Definition: colorspace-private.h:96
Quantum
unsigned short Quantum
Definition: magick-type.h:85