MagickCore  6.9.6
pixel-accessor.h
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1 /*
2  Copyright 1999-2016 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 pixel accessor methods.
17 */
18 #ifndef MAGICKCORE_PIXEL_ACCESSOR_H
19 #define MAGICKCORE_PIXEL_ACCESSOR_H
20 
21 #include <math.h>
22 #include "magick/gem.h"
23 #include "magick/pixel.h"
24 
25 #if defined(__cplusplus) || defined(c_plusplus)
26 extern "C" {
27 #endif
28 
29 #define ClampPixelRed(pixel) ClampToQuantum((pixel)->red)
30 #define ClampPixelGreen(pixel) ClampToQuantum((pixel)->green)
31 #define ClampPixelBlue(pixel) ClampToQuantum((pixel)->blue)
32 #define ClampPixelIndex(indexes) ClampToQuantum(*(indexes))
33 #define ClampPixelOpacity(pixel) ClampToQuantum((pixel)->opacity)
34 #define GetPixela(pixel) ((pixel)->green)
35 #define GetPixelb(pixel) ((pixel)->blue)
36 #define GetPixelAlpha(pixel) (QuantumRange-(pixel)->opacity)
37 #define GetPixelBlack(indexes) (*(indexes))
38 #define GetPixelBlue(pixel) ((pixel)->blue)
39 #define GetPixelCb(pixel) ((pixel)->green)
40 #define GetPixelCr(pixel) ((pixel)->blue)
41 #define GetPixelCyan(pixel) ((pixel)->red)
42 #define GetPixelGray(pixel) ((pixel)->red)
43 #define GetPixelGreen(pixel) ((pixel)->green)
44 #define GetPixelIndex(indexes) (*(indexes))
45 #define GetPixelL(pixel) ((pixel)->red)
46 #define GetPixelLabel(pixel) ((ssize_t) (pixel)->red)
47 #define GetPixelMagenta(pixel) ((pixel)->green)
48 #define GetPixelNext(pixel) ((pixel)+1)
49 #define GetPixelOpacity(pixel) ((pixel)->opacity)
50 #define GetPixelRed(pixel) ((pixel)->red)
51 #define GetPixelRGB(pixel,packet) \
52 { \
53  (packet)->red=GetPixelRed((pixel)); \
54  (packet)->green=GetPixelGreen((pixel)); \
55  (packet)->blue=GetPixelBlue((pixel)); \
56 }
57 #define GetPixelRGBO(pixel,packet) \
58 { \
59  (packet)->red=GetPixelRed((pixel)); \
60  (packet)->green=GetPixelGreen((pixel)); \
61  (packet)->blue=GetPixelBlue((pixel)); \
62  (packet)->opacity=GetPixelOpacity((pixel)); \
63 }
64 #define GetPixelY(pixel) ((pixel)->red)
65 #define GetPixelYellow(pixel) ((pixel)->blue)
66 #define SetPixela(pixel,value) ((pixel)->green=(Quantum) (value))
67 #define SetPixelAlpha(pixel,value) \
68  ((pixel)->opacity=(Quantum) (QuantumRange-(value)))
69 #define SetPixelb(pixel,value) ((pixel)->blue=(Quantum) (value))
70 #define SetPixelBlack(indexes,value) (*(indexes)=(Quantum) (value))
71 #define SetPixelBlue(pixel,value) ((pixel)->blue=(Quantum) (value))
72 #define SetPixelCb(pixel,value) ((pixel)->green=(Quantum) (value))
73 #define SetPixelCr(pixel,value) ((pixel)->blue=(Quantum) (value))
74 #define SetPixelCyan(pixel,value) ((pixel)->red=(Quantum) (value))
75 #define SetPixelGray(pixel,value) \
76  ((pixel)->red=(pixel)->green=(pixel)->blue=(Quantum) (value))
77 #define SetPixelGreen(pixel,value) ((pixel)->green=(Quantum) (value))
78 #define SetPixelIndex(indexes,value) (*(indexes)=(IndexPacket) (value))
79 #define SetPixelL(pixel,value) ((pixel)->red=(Quantum) (value))
80 #define SetPixelMagenta(pixel,value) ((pixel)->green=(Quantum) (value))
81 #define SetPixelOpacity(pixel,value) ((pixel)->opacity=(Quantum) (value))
82 #define SetPixelRed(pixel,value) ((pixel)->red=(Quantum) (value))
83 #define SetPixelRgb(pixel,packet) \
84 { \
85  SetPixelRed(pixel,(packet)->red); \
86  SetPixelGreen(pixel,(packet)->green); \
87  SetPixelBlue(pixel,(packet)->blue); \
88 }
89 #define SetPixelRGBA(pixel,packet) \
90 { \
91  SetPixelRed(pixel,(packet)->red); \
92  SetPixelGreen(pixel,(packet)->green); \
93  SetPixelBlue(pixel,(packet)->blue); \
94  SetPixelAlpha(pixel,(QuantumRange-(packet)->opacity)); \
95 }
96 #define SetPixelRGBO(pixel,packet) \
97 { \
98  SetPixelRed(pixel,(packet)->red); \
99  SetPixelGreen(pixel,(packet)->green); \
100  SetPixelBlue(pixel,(packet)->blue); \
101  SetPixelOpacity(pixel,(packet)->opacity); \
102 }
103 #define SetPixelYellow(pixel,value) ((pixel)->blue=(Quantum) (value))
104 #define SetPixelY(pixel,value) ((pixel)->red=(Quantum) (value))
105 
107 {
108  return(x < 0.0f ? -x : x);
109 }
110 
111 static inline Quantum ClampPixel(const MagickRealType value)
112 {
113  if (value < 0.0f)
114  return(0);
115  if (value >= (MagickRealType) QuantumRange)
116  return((Quantum) QuantumRange);
117 #if !defined(MAGICKCORE_HDRI_SUPPORT)
118  return((Quantum) (value+0.5f));
119 #else
120  return((Quantum) value);
121 #endif
122 }
123 
124 static inline double PerceptibleReciprocal(const double x)
125 {
126  double
127  sign;
128 
129  /*
130  Return 1/x where x is perceptible (not unlimited or infinitesimal).
131  */
132  sign=x < 0.0 ? -1.0 : 1.0;
133  if ((sign*x) >= MagickEpsilon)
134  return(1.0/x);
135  return(sign/MagickEpsilon);
136 }
137 
139  const PixelPacket *magick_restrict pixel)
140 {
142  intensity;
143 
144  intensity=(MagickRealType) (0.212656f*pixel->red+0.715158f*pixel->green+
145  0.072186f*pixel->blue);
146  return(intensity);
147 }
148 
150  const Image *magick_restrict image,const PixelPacket *magick_restrict pixel)
151 {
153  intensity;
154 
155  if (image->colorspace != sRGBColorspace)
156  {
157  intensity=(MagickRealType) (0.212656f*pixel->red+0.715158f*pixel->green+
158  0.072186f*pixel->blue);
159  return(intensity);
160  }
161  intensity=(MagickRealType) (0.212656f*DecodePixelGamma((MagickRealType)
162  pixel->red)+0.715158f*DecodePixelGamma((MagickRealType) pixel->green)+
163  0.072186f*DecodePixelGamma((MagickRealType) pixel->blue));
164  return(intensity);
165 }
166 
167 static inline MagickBooleanType IsPixelAtDepth(const Quantum pixel,
168  const QuantumAny range)
169 {
170  Quantum
171  quantum;
172 
173 #if !defined(MAGICKCORE_HDRI_SUPPORT)
175  (((MagickRealType) range*pixel)/QuantumRange+0.5)))/range+0.5);
176 #else
178  (((MagickRealType) range*pixel)/QuantumRange+0.5)))/range);
179 #endif
180  return(pixel == quantum ? MagickTrue : MagickFalse);
181 }
182 
183 static inline MagickBooleanType IsPixelGray(const PixelPacket *pixel)
184 {
186  green_blue,
187  red_green;
188 
189  red_green=(MagickRealType) pixel->red-pixel->green;
190  green_blue=(MagickRealType) pixel->green-pixel->blue;
191  if (((QuantumScale*AbsolutePixelValue(red_green)) < MagickEpsilon) &&
193  return(MagickTrue);
194  return(MagickFalse);
195 }
196 
198 {
200  green_blue,
201  red,
202  red_green;
203 
204  red=(MagickRealType) pixel->red;
205  if ((AbsolutePixelValue(red) >= MagickEpsilon) &&
207  return(MagickFalse);
208  red_green=(MagickRealType) pixel->red-pixel->green;
209  green_blue=(MagickRealType) pixel->green-pixel->blue;
210  if (((QuantumScale*AbsolutePixelValue(red_green)) < MagickEpsilon) &&
212  return(MagickTrue);
213  return(MagickFalse);
214 }
215 
216 static inline Quantum PixelPacketIntensity(const PixelPacket *pixel)
217 {
219  intensity;
220 
221  if ((pixel->red == pixel->green) && (pixel->green == pixel->blue))
222  return(pixel->red);
223  intensity=(MagickRealType) (0.212656*pixel->red+0.715158*pixel->green+
224  0.072186*pixel->blue);
225  return(ClampToQuantum(intensity));
226 }
227 
228 static inline void SetPixelViaMagickPixel(const Image *magick_restrict image,
229  const MagickPixelPacket *magick_restrict magick_pixel,
231 {
232  pixel->red=ClampToQuantum(magick_pixel->red);
233  pixel->green=ClampToQuantum(magick_pixel->green);
234  pixel->blue=ClampToQuantum(magick_pixel->blue);
235  if (image->matte != MagickFalse)
236  pixel->opacity=ClampToQuantum(magick_pixel->opacity);
237 }
238 
239 #if defined(__cplusplus) || defined(c_plusplus)
240 }
241 #endif
242 
243 #endif
#define magick_restrict
Definition: MagickCore.h:41
static MagickRealType GetPixelLuma(const Image *magick_restrict image, const PixelPacket *magick_restrict pixel)
Definition: pixel-accessor.h:138
Definition: colorspace.h:40
Quantum blue
Definition: pixel.h:143
static MagickRealType GetPixelLuminance(const Image *magick_restrict image, const PixelPacket *magick_restrict pixel)
Definition: pixel-accessor.h:149
static MagickRealType AbsolutePixelValue(const MagickRealType x)
Definition: pixel-accessor.h:106
float MagickRealType
Definition: magick-type.h:76
Definition: pixel.h:131
Quantum green
Definition: pixel.h:143
#define MagickEpsilon
Definition: magick-type.h:139
Definition: image.h:152
MagickExport MagickRealType DecodePixelGamma(const MagickRealType pixel)
Definition: pixel.c:255
static void SetPixelViaMagickPixel(const Image *magick_restrict image, const MagickPixelPacket *magick_restrict magick_pixel, PixelPacket *magick_restrict pixel)
Definition: pixel-accessor.h:228
MagickBooleanType
Definition: magick-type.h:211
static double PerceptibleReciprocal(const double x)
Definition: pixel-accessor.h:124
Quantum red
Definition: pixel.h:143
Definition: pixel.h:104
static MagickBooleanType IsPixelAtDepth(const Quantum pixel, const QuantumAny range)
Definition: pixel-accessor.h:167
static Quantum ClampPixel(const MagickRealType value)
Definition: pixel-accessor.h:111
Definition: magick-type.h:214
#define QuantumScale
Definition: magick-type.h:142
static Quantum PixelPacketIntensity(const PixelPacket *pixel)
Definition: pixel-accessor.h:216
static MagickBooleanType IsPixelGray(const PixelPacket *pixel)
Definition: pixel-accessor.h:183
static Quantum ClampToQuantum(const MagickRealType value)
Definition: quantum.h:87
Definition: magick-type.h:213
unsigned short Quantum
Definition: magick-type.h:93
static MagickBooleanType IsPixelMonochrome(const PixelPacket *pixel)
Definition: pixel-accessor.h:197
MagickSizeType QuantumAny
Definition: magick-type.h:170
#define QuantumRange
Definition: magick-type.h:94