18#ifndef MAGICKCORE_QUANTUM_H
19#define MAGICKCORE_QUANTUM_H
22#include "MagickCore/image.h"
23#include "MagickCore/semaphore.h"
25#if defined(__cplusplus) || defined(c_plusplus)
38 UndefinedQuantumAlpha,
39 AssociatedQuantumAlpha,
40 DisassociatedQuantumAlpha
45 UndefinedQuantumFormat,
46 FloatingPointQuantumFormat,
86static inline Quantum ClampToQuantum(
const MagickRealType quantum)
88#if defined(MAGICKCORE_HDRI_SUPPORT)
89 return((Quantum) quantum);
91 if ((IsNaN(quantum) != 0) || (quantum <= 0.0))
93 if (quantum >= (MagickRealType) QuantumRange)
95 return((Quantum) (quantum+0.5));
99#if (MAGICKCORE_QUANTUM_DEPTH == 8)
100static inline unsigned char ScaleQuantumToChar(
const Quantum quantum)
102#if !defined(MAGICKCORE_HDRI_SUPPORT)
103 return((
unsigned char) quantum);
105 if ((IsNaN(quantum) != 0) || (quantum <= 0.0))
106 return((
unsigned char) 0);
107 if (quantum >= 255.0)
108 return((
unsigned char) 255);
109 return((
unsigned char) (quantum+0.5));
112#elif (MAGICKCORE_QUANTUM_DEPTH == 16)
113static inline unsigned char ScaleQuantumToChar(
const Quantum quantum)
115#if !defined(MAGICKCORE_HDRI_SUPPORT)
116 return((
unsigned char) (((quantum+128UL)-((quantum+128UL) >> 8)) >> 8));
118 if ((IsNaN(quantum) != 0) || (quantum <= 0.0f))
119 return((
unsigned char) 0);
120 const Quantum scaled = quantum/257.0f;
121 if (scaled >= 255.0f)
122 return((
unsigned char) 255);
123 return((
unsigned char) (scaled+0.5f));
126#elif (MAGICKCORE_QUANTUM_DEPTH == 32)
127static inline unsigned char ScaleQuantumToChar(
const Quantum quantum)
129#if !defined(MAGICKCORE_HDRI_SUPPORT)
130 return((
unsigned char) ((quantum+MagickULLConstant(8421504))/
131 MagickULLConstant(16843009)));
133 if ((IsNaN(quantum) != 0) || (quantum <= 0.0))
135 const Quantum scaled = quantum/16843009.0;
137 return((
unsigned char) 255);
138 return((
unsigned char) (scaled+0.5));
141#elif (MAGICKCORE_QUANTUM_DEPTH == 64)
142static 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 const Quantum scaled = quantum/72340172838076673.0;
151 return((
unsigned char) 255);
152 return((
unsigned char) (scaled+0.5));
157extern MagickExport EndianType
160extern MagickExport MagickBooleanType
166extern MagickExport QuantumFormatType
173extern MagickExport QuantumType
176extern MagickExport
size_t
183extern MagickExport
unsigned char
186extern MagickExport
void
188 SetQuantumAlphaType(
QuantumInfo *,
const QuantumAlphaType),
189 SetQuantumImageType(
Image *,
const QuantumType),
190 SetQuantumMinIsWhite(
QuantumInfo *,
const MagickBooleanType),
191 SetQuantumPack(
QuantumInfo *,
const MagickBooleanType),
195#if defined(__cplusplus) || defined(c_plusplus)