MagickCore  6.8.9
color-private.h
Go to the documentation of this file.
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 {
107  blue,
108  green,
109  red;
110 
111  if (pixel->colorspace == GRAYColorspace)
112  return(pixel->red);
113  if (pixel->colorspace == sRGBColorspace)
114  return(0.212656*pixel->red+0.715158*pixel->green+0.072186*pixel->blue);
115  red=EncodePixelGamma(pixel->red);
116  green=EncodePixelGamma(pixel->green);
117  blue=EncodePixelGamma(pixel->blue);
118  return(0.212656*red+0.715158*green+0.072186*blue);
119 }
120 
122  const MagickPixelPacket *pixel)
123 {
125  blue,
126  green,
127  red;
128 
129  if (pixel->colorspace == GRAYColorspace)
130  return(pixel->red);
131  if (pixel->colorspace != sRGBColorspace)
132  return(0.212656*pixel->red+0.715158*pixel->green+0.072186*pixel->blue);
133  red=DecodePixelGamma(pixel->red);
134  green=DecodePixelGamma(pixel->green);
135  blue=DecodePixelGamma(pixel->blue);
136  return(0.212656*red+0.715158*green+0.072186*blue);
137 }
138 
139 #if defined(__cplusplus) || defined(c_plusplus)
140 }
141 #endif
142 
143 #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:121
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:79
Definition: pixel.h:131
Quantum green
Definition: pixel.h:143
#define MagickEpsilon
Definition: magick-type.h:142
static Quantum ClampToQuantum(const MagickRealType quantum)
Definition: quantum.h:88
MagickExport MagickRealType DecodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:187
MagickBooleanType
Definition: magick-type.h:214
Quantum red
Definition: pixel.h:143
Definition: pixel.h:104
Definition: magick-type.h:217
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
MagickBooleanType matte
Definition: pixel.h:113
Definition: magick-type.h:216
unsigned short Quantum
Definition: magick-type.h:96
#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