18 #ifndef MAGICKCORE_QUANTUM_H
19 #define MAGICKCORE_QUANTUM_H
22 #include "magick/image.h"
23 #include "magick/semaphore.h"
25 #if defined(__cplusplus) || defined(c_plusplus)
29 #define RoundToQuantum(quantum) ClampToQuantum(quantum)
40 UndefinedQuantumAlpha,
41 AssociatedQuantumAlpha,
42 DisassociatedQuantumAlpha
47 UndefinedQuantumFormat,
48 FloatingPointQuantumFormat,
88 static inline Quantum ClampToQuantum(
const MagickRealType quantum)
90 #if defined(MAGICKCORE_HDRI_SUPPORT)
91 return((Quantum) quantum);
93 if ((IsNaN(quantum) != 0) || (quantum <= 0.0))
95 if (quantum >= (MagickRealType) QuantumRange)
97 return((Quantum) (quantum+0.5));
101 #if (MAGICKCORE_QUANTUM_DEPTH == 8)
102 static inline unsigned char ScaleQuantumToChar(
const Quantum quantum)
104 #if !defined(MAGICKCORE_HDRI_SUPPORT)
105 return((
unsigned char) quantum);
107 if ((IsNaN(quantum) != 0) || (quantum <= 0.0))
109 if (quantum >= 255.0)
111 return((
unsigned char) (quantum+0.5));
114 #elif (MAGICKCORE_QUANTUM_DEPTH == 16)
115 static inline unsigned char ScaleQuantumToChar(
const Quantum quantum)
117 #if !defined(MAGICKCORE_HDRI_SUPPORT)
118 return((
unsigned char) (((quantum+128UL)-((quantum+128UL) >> 8)) >> 8));
120 if ((IsNaN(quantum) != 0) || (quantum <= 0.0))
122 if ((quantum/257.0) >= 255.0)
124 return((
unsigned char) (quantum/257.0+0.5));
127 #elif (MAGICKCORE_QUANTUM_DEPTH == 32)
128 static inline unsigned char ScaleQuantumToChar(
const Quantum quantum)
130 #if !defined(MAGICKCORE_HDRI_SUPPORT)
131 return((
unsigned char) ((quantum+MagickULLConstant(8421504))/
132 MagickULLConstant(16843009)));
134 if ((IsNaN(quantum) != 0) || (quantum <= 0.0))
136 if ((quantum/16843009.0) >= 255.0)
138 return((
unsigned char) (quantum/16843009.0+0.5));
141 #elif (MAGICKCORE_QUANTUM_DEPTH == 64)
142 static inline unsigned char ScaleQuantumToChar(
const Quantum quantum)
144 #if !defined(MAGICKCORE_HDRI_SUPPORT)
145 return((
unsigned char) (quantum/72340172838076673.0+0.5));
147 if ((IsNaN(quantum) != 0) || (quantum <= 0.0))
149 if ((quantum/72340172838076673.0) >= 255.0)
151 return((
unsigned char) (quantum/72340172838076673.0+0.5));
156 extern MagickExport EndianType
159 extern MagickExport MagickBooleanType
165 extern MagickExport QuantumFormatType
172 extern MagickExport QuantumType
175 extern MagickExport
size_t
177 const QuantumType,
unsigned char *magick_restrict,
ExceptionInfo *),
182 extern MagickExport
unsigned char
185 extern MagickExport
void
187 SetQuantumAlphaType(
QuantumInfo *,
const QuantumAlphaType),
188 SetQuantumImageType(
Image *,
const QuantumType),
189 SetQuantumMinIsWhite(
QuantumInfo *,
const MagickBooleanType),
190 SetQuantumPack(
QuantumInfo *,
const MagickBooleanType),
194 #if defined(__cplusplus) || defined(c_plusplus)