MagickCore  6.9.7
image-private.h
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1 /*
2  Copyright 1999-2017 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 private methods.
17 */
18 #ifndef MAGICKCORE_IMAGE_PRIVATE_H
19 #define MAGICKCORE_IMAGE_PRIVATE_H
20 
21 #include <errno.h>
22 #include <limits.h>
23 #include <stdint.h>
24 
25 #if defined(__cplusplus) || defined(c_plusplus)
26 extern "C" {
27 #endif
28 
29 #define MagickAbsoluteValue(x) ((x) < 0 ? -(x) : (x))
30 #define MagickMax(x,y) (((x) > (y)) ? (x) : (y))
31 #define MagickMin(x,y) (((x) < (y)) ? (x) : (y))
32 #define MagickPI 3.14159265358979323846264338327950288419716939937510
33 #define Magick2PI 6.28318530717958647692528676655900576839433879875020
34 #define MagickPHI 1.61803398874989484820458683436563811772030917980576
35 #define MagickPI2 1.57079632679489661923132169163975144209858469968755
36 #define MagickSQ1_2 0.70710678118654752440084436210484903928483593768847
37 #define MagickSQ2 1.41421356237309504880168872420969807856967187537695
38 #define MagickSQ2PI 2.50662827463100024161235523934010416269302368164062
39 #define MAGICK_SIZE_MAX (SIZE_MAX)
40 #define MAGICK_SSIZE_MAX (SSIZE_MAX)
41 #define MAGICK_SSIZE_MIN (-(SSIZE_MAX)-1)
42 #define UndefinedTicksPerSecond 100L
43 #define UndefinedCompressionQuality 0UL
44 
45 extern MagickExport const char
47  BorderColor[],
52  MatteColor[],
53  LoadImageTag[],
54  LoadImagesTag[],
57  SaveImageTag[],
58  SaveImagesTag[];
59 
60 extern MagickExport const double
62 
63 
64 static inline size_t CastDoubleToLong(const double x)
65 {
66  double
67  value;
68 
69  if (IsNaN(x) != 0)
70  {
71  errno=ERANGE;
72  return(0);
73  }
74  if (x < 0.0)
75  {
76  value=ceil(x);
77  if (value < ((double) MAGICK_SSIZE_MIN))
78  {
79  errno=ERANGE;
80  return((ssize_t) MAGICK_SSIZE_MIN);
81  }
82  }
83  else
84  {
85  value=floor(x);
86  if (value > ((double) MAGICK_SSIZE_MAX))
87  {
88  errno=ERANGE;
89  return((ssize_t) MAGICK_SSIZE_MAX);
90  }
91  }
92  return((ssize_t) value);
93 }
94 
95 static inline QuantumAny CastDoubleToQuantumAny(const double x)
96 {
97  if (IsNaN(x) != 0)
98  return(0);
99  if (x > ((double) ((QuantumAny) ~0)))
100  return((QuantumAny) ~0);
101  if (x < 0.0)
102  return(0.0);
103  return((QuantumAny) (x+0.5));
104 }
105 
106 static inline size_t CastDoubleToUnsigned(const double x)
107 {
108  double
109  value;
110 
111  if (IsNaN(x) != 0)
112  {
113  errno=ERANGE;
114  return(0);
115  }
116  value=floor(x);
117  if (value >= ((double) MAGICK_SIZE_MAX))
118  {
119  errno=ERANGE;
120  return((size_t) MAGICK_SIZE_MAX);
121  }
122  if (value < 0.0)
123  {
124  errno=ERANGE;
125  return(0);
126  }
127  return((size_t) value);
128 }
129 
130 static inline double DegreesToRadians(const double degrees)
131 {
132  return((double) (MagickPI*degrees/180.0));
133 }
134 
135 static inline MagickRealType RadiansToDegrees(const MagickRealType radians)
136 {
137  return((MagickRealType) (180.0*radians/MagickPI));
138 }
139 
140 static inline unsigned char ScaleColor5to8(const unsigned int color)
141 {
142  return((unsigned char) (((color) << 3) | ((color) >> 2)));
143 }
144 
145 static inline unsigned char ScaleColor6to8(const unsigned int color)
146 {
147  return((unsigned char) (((color) << 2) | ((color) >> 4)));
148 }
149 
150 static inline unsigned int ScaleColor8to5(const unsigned char color)
151 {
152  return((unsigned int) (((color) & ~0x07) >> 3));
153 }
154 
155 static inline unsigned int ScaleColor8to6(const unsigned char color)
156 {
157  return((unsigned int) (((color) & ~0x03) >> 2));
158 }
159 
160 #if defined(__cplusplus) || defined(c_plusplus)
161 }
162 #endif
163 
164 #endif
MagickExport const char BackgroundColor[]
Definition: image.c:107
#define MAGICK_SSIZE_MIN
Definition: image-private.h:41
MagickExport const char PSDensityGeometry[]
Definition: image.c:116
static unsigned char ScaleColor6to8(const unsigned int color)
Definition: image-private.h:145
#define MAGICK_SIZE_MAX
Definition: image-private.h:39
MagickExport const char DefaultTileFrame[]
Definition: image.c:109
static unsigned char ScaleColor5to8(const unsigned int color)
Definition: image-private.h:140
#define MAGICK_SSIZE_MAX
Definition: image-private.h:40
MagickExport const char DefaultTileGeometry[]
Definition: image.c:110
static size_t CastDoubleToUnsigned(const double x)
Definition: image-private.h:106
#define MagickPI
Definition: image-private.h:32
MagickExport const char LoadImageTag[]
Definition: image.c:113
float MagickRealType
Definition: magick-type.h:80
MagickExport const char ForegroundColor[]
Definition: image.c:112
static QuantumAny CastDoubleToQuantumAny(const double x)
Definition: image-private.h:95
static unsigned int ScaleColor8to6(const unsigned char color)
Definition: image-private.h:155
static double DegreesToRadians(const double degrees)
Definition: image-private.h:130
static unsigned int ScaleColor8to5(const unsigned char color)
Definition: image-private.h:150
MagickExport const char DefaultTileLabel[]
Definition: image.c:111
static size_t CastDoubleToLong(const double x)
Definition: image-private.h:64
MagickExport const char BorderColor[]
Definition: image.c:108
MagickExport const char SaveImageTag[]
Definition: image.c:118
#define IsNaN(a)
Definition: magick-type.h:227
MagickExport const char LoadImagesTag[]
Definition: image.c:114
MagickExport const char MatteColor[]
Definition: image.c:115
static MagickRealType RadiansToDegrees(const MagickRealType radians)
Definition: image-private.h:135
#define MagickExport
Definition: method-attribute.h:98
MagickExport const double DefaultResolution
Definition: image.c:123
MagickSizeType QuantumAny
Definition: magick-type.h:174
MagickExport const char PSPageGeometry[]
Definition: image.c:117
MagickExport const char SaveImagesTag[]
Definition: image.c:119