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/*
Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization
dedicated to making software imaging solutions freely available.
You may not use this file except in compliance with the License. You may
obtain a copy of the License at
https://imagemagick.org/script/license.php
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
MagickCore quantum inline methods.
*/
#ifndef MAGICKCORE_QUANTUM_H
#define MAGICKCORE_QUANTUM_H
#include "magick/image.h"
#include "magick/semaphore.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#define RoundToQuantum(quantum) ClampToQuantum(quantum)
typedef enum
{
UndefinedEndian,
LSBEndian,
MSBEndian
} EndianType;
typedef enum
{
UndefinedQuantumAlpha,
AssociatedQuantumAlpha,
DisassociatedQuantumAlpha
} QuantumAlphaType;
typedef enum
{
UndefinedQuantumFormat,
FloatingPointQuantumFormat,
SignedQuantumFormat,
UnsignedQuantumFormat
} QuantumFormatType;
typedef enum
{
UndefinedQuantum,
AlphaQuantum,
BlackQuantum,
BlueQuantum,
CMYKAQuantum,
CMYKQuantum,
CyanQuantum,
GrayAlphaQuantum,
GrayQuantum,
GreenQuantum,
IndexAlphaQuantum,
IndexQuantum,
MagentaQuantum,
OpacityQuantum,
RedQuantum,
RGBAQuantum,
BGRAQuantum,
RGBOQuantum,
RGBQuantum,
YellowQuantum,
GrayPadQuantum, /* deprecated */
RGBPadQuantum,
CbYCrYQuantum,
CbYCrQuantum,
CbYCrAQuantum,
CMYKOQuantum,
BGRQuantum,
BGROQuantum
} QuantumType;
typedef struct _QuantumInfo
QuantumInfo;
static inline Quantum ClampToQuantum(const MagickRealType value)
{
#if defined(MAGICKCORE_HDRI_SUPPORT)
return((Quantum) value);
#else
if (value <= 0.0f)
return((Quantum) 0);
if (value >= (MagickRealType) QuantumRange)
return(QuantumRange);
return((Quantum) (value+0.5f));
#endif
}
#if (MAGICKCORE_QUANTUM_DEPTH == 8)
static inline unsigned char ScaleQuantumToChar(const Quantum quantum)
{
#if !defined(MAGICKCORE_HDRI_SUPPORT)
return((unsigned char) quantum);
#else
if (quantum <= 0.0)
return(0);
if (quantum >= 255.0)
return(255);
return((unsigned char) (quantum+0.5));
#endif
}
#elif (MAGICKCORE_QUANTUM_DEPTH == 16)
static inline unsigned char ScaleQuantumToChar(const Quantum quantum)
{
#if !defined(MAGICKCORE_HDRI_SUPPORT)
return((unsigned char) (((quantum+128UL)-((quantum+128UL) >> 8)) >> 8));
#else
if (quantum <= 0.0)
return(0);
if ((quantum/257.0) >= 255.0)
return(255);
return((unsigned char) (quantum/257.0+0.5));
#endif
}
#elif (MAGICKCORE_QUANTUM_DEPTH == 32)
static inline unsigned char ScaleQuantumToChar(const Quantum quantum)
{
#if !defined(MAGICKCORE_HDRI_SUPPORT)
return((unsigned char) ((quantum+MagickULLConstant(8421504))/
MagickULLConstant(16843009)));
#else
if (quantum <= 0.0)
return(0);
if ((quantum/16843009.0) >= 255.0)
return(255);
return((unsigned char) (quantum/16843009.0+0.5));
#endif
}
#elif (MAGICKCORE_QUANTUM_DEPTH == 64)
static inline unsigned char ScaleQuantumToChar(const Quantum quantum)
{
#if !defined(MAGICKCORE_HDRI_SUPPORT)
return((unsigned char) (quantum/72340172838076673.0+0.5));
#else
if (quantum <= 0.0)
return(0);
if ((quantum/72340172838076673.0) >= 255.0)
return(255);
return((unsigned char) (quantum/72340172838076673.0+0.5));
#endif
}
#endif
extern MagickExport EndianType
GetQuantumEndian(const QuantumInfo *);
extern MagickExport MagickBooleanType
SetQuantumDepth(const Image *,QuantumInfo *,const size_t),
SetQuantumEndian(const Image *,QuantumInfo *,const EndianType),
SetQuantumFormat(const Image *,QuantumInfo *,const QuantumFormatType),
SetQuantumPad(const Image *,QuantumInfo *,const size_t);
extern MagickExport QuantumFormatType
GetQuantumFormat(const QuantumInfo *);
extern MagickExport QuantumInfo
*AcquireQuantumInfo(const ImageInfo *,Image *),
*DestroyQuantumInfo(QuantumInfo *);
extern MagickExport QuantumType
GetQuantumType(Image *,ExceptionInfo *);
extern MagickExport size_t
ExportQuantumPixels(const Image *,const CacheView *,const QuantumInfo *,
const QuantumType,unsigned char *magick_restrict,ExceptionInfo *),
GetQuantumExtent(const Image *,const QuantumInfo *,const QuantumType),
ImportQuantumPixels(Image *,CacheView *,const QuantumInfo *,const QuantumType,
const unsigned char *magick_restrict,ExceptionInfo *);
extern MagickExport unsigned char
*GetQuantumPixels(const QuantumInfo *);
extern MagickExport void
GetQuantumInfo(const ImageInfo *,QuantumInfo *),
SetQuantumAlphaType(QuantumInfo *,const QuantumAlphaType),
SetQuantumImageType(Image *,const QuantumType),
SetQuantumMinIsWhite(QuantumInfo *,const MagickBooleanType),
SetQuantumPack(QuantumInfo *,const MagickBooleanType),
SetQuantumQuantum(QuantumInfo *,const size_t),
SetQuantumScale(QuantumInfo *,const double);
#if defined(__cplusplus) || defined(c_plusplus)
}
#endif
#endif