MagickCore  6.8.9
color-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 color methods.
17 */
18 #ifndef _MAGICKCORE_COLOR_PRIVATE_H
19 #define _MAGICKCORE_COLOR_PRIVATE_H
20 
21 #include "magick/image.h"
22 #include "magick/color.h"
24 #include "magick/pixel-accessor.h"
25 
26 #if defined(__cplusplus) || defined(c_plusplus)
27 extern "C" {
28 #endif
29 
31  const PixelPacket *q)
32 {
34  blue,
35  green,
36  red;
37 
38  red=(MagickRealType) p->red;
39  green=(MagickRealType) p->green;
40  blue=(MagickRealType) p->blue;
41  if ((fabs(red-q->red) < MagickEpsilon) &&
42  (fabs(green-q->green) < MagickEpsilon) &&
43  (fabs(blue-q->blue) < MagickEpsilon))
44  return(MagickTrue);
45  return(MagickFalse);
46 }
47 
49  const MagickPixelPacket *q)
50 {
51  if ((p->matte != MagickFalse) && (q->matte == MagickFalse) &&
52  (fabs(p->opacity-OpaqueOpacity) >= MagickEpsilon))
53  return(MagickFalse);
54  if ((q->matte != MagickFalse) && (p->matte == MagickFalse) &&
55  (fabs(q->opacity-OpaqueOpacity)) >= MagickEpsilon)
56  return(MagickFalse);
57  if ((p->matte != MagickFalse) && (q->matte != MagickFalse))
58  {
59  if (fabs(p->opacity-q->opacity) >= MagickEpsilon)
60  return(MagickFalse);
62  return(MagickTrue);
63  }
64  if (fabs(p->red-q->red) >= MagickEpsilon)
65  return(MagickFalse);
66  if (fabs(p->green-q->green) >= MagickEpsilon)
67  return(MagickFalse);
68  if (fabs(p->blue-q->blue) >= MagickEpsilon)
69  return(MagickFalse);
70  if ((p->colorspace == CMYKColorspace) &&
71  (fabs(p->index-q->index) >= MagickEpsilon))
72  return(MagickFalse);
73  return(MagickTrue);
74 }
75 
77 {
78  if ((pixel->colorspace != GRAYColorspace) &&
79  (pixel->colorspace != RGBColorspace))
80  return(MagickFalse);
81  if ((fabs(pixel->red-pixel->green) < MagickEpsilon) &&
82  (fabs(pixel->green-pixel->blue) < MagickEpsilon))
83  return(MagickTrue);
84  return(MagickFalse);
85 }
86 
88  const MagickPixelPacket *pixel)
89 {
90  if (pixel->colorspace == GRAYColorspace)
91  return(pixel->red);
92  return(0.212656*pixel->red+0.715158*pixel->green+0.072186*pixel->blue);
93 }
94 
96  const MagickPixelPacket *pixel)
97 {
98  if (pixel->colorspace == GRAYColorspace)
99  return(ClampToQuantum(pixel->red));
100  return(ClampToQuantum(0.212656*pixel->red+0.715158*pixel->green+
101  0.072186*pixel->blue));
102 }
103 
105  const MagickPixelPacket *pixel)
106 {
108  blue,
109  green,
110  red;
111 
112  if (pixel->colorspace == GRAYColorspace)
113  return(pixel->red);
114  if (pixel->colorspace == sRGBColorspace)
115  return(0.212656*pixel->red+0.715158*pixel->green+0.072186*pixel->blue);
116  red=EncodePixelGamma(pixel->red);
117  green=EncodePixelGamma(pixel->green);
118  blue=EncodePixelGamma(pixel->blue);
119  return(0.212656*red+0.715158*green+0.072186*blue);
120 }
121 
123  const MagickPixelPacket *pixel)
124 {
126  blue,
127  green,
128  red;
129 
130  if (pixel->colorspace == GRAYColorspace)
131  return(pixel->red);
132  if (pixel->colorspace != sRGBColorspace)
133  return(0.212656*pixel->red+0.715158*pixel->green+0.072186*pixel->blue);
134  red=DecodePixelGamma(pixel->red);
135  green=DecodePixelGamma(pixel->green);
136  blue=DecodePixelGamma(pixel->blue);
137  return(0.212656*red+0.715158*green+0.072186*blue);
138 }
139 
140 #if defined(__cplusplus) || defined(c_plusplus)
141 }
142 #endif
143 
144 #endif
MagickExport MagickRealType EncodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:283
MagickRealType opacity
Definition: pixel.h:122
static MagickRealType MagickPixelIntensity(const MagickPixelPacket *pixel)
Definition: color-private.h:87
ColorspaceType colorspace
Definition: pixel.h:110
static MagickRealType MagickPixelLuminance(const MagickPixelPacket *pixel)
Definition: color-private.h:122
Definition: colorspace.h:40
Quantum blue
Definition: pixel.h:143
static Quantum MagickPixelIntensityToQuantum(const MagickPixelPacket *pixel)
Definition: color-private.h:95
float MagickRealType
Definition: magick-type.h:76
Definition: pixel.h:131
Quantum green
Definition: pixel.h:143
#define MagickEpsilon
Definition: magick-type.h:139
MagickExport MagickRealType DecodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:187
MagickBooleanType
Definition: magick-type.h:211
Quantum red
Definition: pixel.h:143
Definition: pixel.h:104
Definition: magick-type.h:214
static MagickBooleanType IsMagickGray(const MagickPixelPacket *pixel)
Definition: color-private.h:76
#define TransparentOpacity
Definition: image.h:28
Definition: colorspace.h:39
MagickRealType red
Definition: pixel.h:122
static Quantum ClampToQuantum(const MagickRealType value)
Definition: quantum.h:87
MagickBooleanType matte
Definition: pixel.h:113
Definition: magick-type.h:213
unsigned short Quantum
Definition: magick-type.h:93
#define OpaqueOpacity
Definition: image.h:27
Definition: colorspace.h:28
MagickRealType green
Definition: pixel.h:122
Definition: colorspace.h:29
static MagickRealType MagickPixelLuma(const MagickPixelPacket *pixel)
Definition: color-private.h:104
MagickRealType blue
Definition: pixel.h:122
static MagickBooleanType IsMagickColorEqual(const MagickPixelPacket *p, const MagickPixelPacket *q)
Definition: color-private.h:48
static MagickBooleanType IsColorEqual(const PixelPacket *p, const PixelPacket *q)
Definition: color-private.h:30
MagickRealType index
Definition: pixel.h:122