#include "tiffiop.h"
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "uvcode.h"

Macros
#define	DecoderState(tif) ((LogLuvState*) (tif)->tif_data)

#define	EncoderState(tif) ((LogLuvState*) (tif)->tif_data)

#define	SGILOGDATAFMT_UNKNOWN -1

#define	MINRUN 4 /* minimum run length */

#define	M_LN2 0.69314718055994530942

#define	M_PI 3.14159265358979323846

#define	log2(x) ((1./M_LN2)*log(x))

#define	exp2(x) exp(M_LN2*(x))

#define	itrunc(x, m)

#define	NANGLES 100

#define	uv2ang(u, v)

#define	PACK(s, b, f) (((b)<<6)\|((s)<<3)\|(f))

#define	PACK(a, b) (((a)<<3)\|(b))

Typedefs
typedef struct logLuvState	LogLuvState

Functions
double	LogL16toY (int p16)

int	LogL16fromY (double Y, int em)

void	XYZtoRGB24 (float xyz[3], uint8 rgb[3])

double	LogL10toY (int p10)

int	LogL10fromY (double Y, int em)

int	uv_encode (double u, double v, int em)

int	uv_decode (double up, double vp, int c)

void	LogLuv24toXYZ (uint32 p, float XYZ[3])

uint32	LogLuv24fromXYZ (float XYZ[3], int em)

void	LogLuv32toXYZ (uint32 p, float XYZ[3])

uint32	LogLuv32fromXYZ (float XYZ[3], int em)

int	TIFFInitSGILog (TIFF *tif, int scheme)

Macro Definition Documentation

◆ DecoderState

#define DecoderState ( tif ) ((LogLuvState*) (tif)->tif_data)

Definition at line 173 of file tif_luv.c.

◆ EncoderState

#define EncoderState ( tif ) ((LogLuvState*) (tif)->tif_data)

Definition at line 174 of file tif_luv.c.

◆ exp2

#define exp2 ( x ) exp(M_LN2*(x))

Definition at line 640 of file tif_luv.c.

◆ itrunc

#define itrunc	(	x,
		m
	)

Value:

((m)==SGILOGENCODE_NODITHER ? \
                (int)(x) : \
                (int)((x) + rand()*(1./RAND_MAX) - .5))

Definition at line 642 of file tif_luv.c.

Referenced by LogL10fromY(), LogL16fromY(), and LogLuv32fromXYZ().

◆ log2

#define log2 ( x ) ((1./M_LN2)*log(x))

Definition at line 639 of file tif_luv.c.

Referenced by LogL10fromY(), and LogL16fromY().

◆ M_LN2

#define M_LN2 0.69314718055994530942

Definition at line 634 of file tif_luv.c.

Referenced by LogL10toY(), and LogL16toY().

◆ M_PI

#define M_PI 3.14159265358979323846

Definition at line 637 of file tif_luv.c.

◆ MINRUN

#define MINRUN 4 /* minimum run length */

Definition at line 178 of file tif_luv.c.

◆ NANGLES

#define NANGLES 100

Definition at line 753 of file tif_luv.c.

◆ PACK [1/2]

#define PACK	(	s,
		b,
		f
	)	(((b)<<6)\|((s)<<3)\|(f))

◆ PACK [2/2]

#define PACK	(	a,
		b
	)	(((a)<<3)\|(b))

◆ SGILOGDATAFMT_UNKNOWN

#define SGILOGDATAFMT_UNKNOWN -1

Definition at line 176 of file tif_luv.c.

Referenced by TIFFInitSGILog().

◆ uv2ang

#define uv2ang	(	u,
		v
	)

Value:

( (NANGLES*.499999999/M_PI) \

* atan2((v)-V_NEU,(u)-U_NEU) + .5*NANGLES )

M_PI

#define M_PI

Definition: tif_luv.c:637

V_NEU

#define V_NEU

Definition: tiffio.h:476

v

const GLdouble * v

Definition: khronos_glext.h:5739

U_NEU

#define U_NEU

Definition: tiffio.h:475

NANGLES

#define NANGLES

Definition: tif_luv.c:753

Definition at line 754 of file tif_luv.c.

Typedef Documentation

◆ LogLuvState

typedef struct logLuvState LogLuvState

Definition at line 158 of file tif_luv.c.

Function Documentation

◆ LogL10fromY()

int LogL10fromY	(	double	Y,
		int	em
	)

Definition at line 743 of file tif_luv.c.

References itrunc, and log2.

Referenced by LogLuv24fromXYZ().

◆ LogL10toY()

double LogL10toY ( int p10 )

Definition at line 732 of file tif_luv.c.

References vl::exp(), and M_LN2.

Referenced by LogLuv24toXYZ().

◆ LogL16fromY()

int LogL16fromY	(	double	Y,
		int	em
	)

Definition at line 665 of file tif_luv.c.

References itrunc, and log2.

Referenced by LogLuv32fromXYZ().

◆ LogL16toY()

double LogL16toY ( int p16 )

Definition at line 650 of file tif_luv.c.

References vl::exp(), and M_LN2.

Referenced by LogLuv32toXYZ().

◆ LogLuv24fromXYZ()

uint32 LogLuv24fromXYZ	(	float	XYZ[3],
		int	em
	)

Definition at line 896 of file tif_luv.c.

References LogL10fromY(), SGILOGENCODE_NODITHER, U_NEU, uv_encode(), and V_NEU.

◆ LogLuv24toXYZ()

void LogLuv24toXYZ	(	uint32	p,
		float	XYZ[3]
	)

Definition at line 868 of file tif_luv.c.

References LogL10toY(), U_NEU, uv_decode(), and V_NEU.

◆ LogLuv32fromXYZ()

uint32 LogLuv32fromXYZ	(	float	XYZ[3],
		int	em
	)

Definition at line 1034 of file tif_luv.c.

References int, itrunc, LogL16fromY(), U_NEU, UVSCALE, and V_NEU.

◆ LogLuv32toXYZ()

void LogLuv32toXYZ	(	uint32	p,
		float	XYZ[3]
	)

Definition at line 1009 of file tif_luv.c.

References LogL16toY(), and UVSCALE.

◆ TIFFInitSGILog()

int TIFFInitSGILog	(	TIFF *	tif,
		int	scheme
	)

Definition at line 1556 of file tif_luv.c.

References _TIFFmalloc(), _TIFFmemset(), COMPRESSION_SGILOG, COMPRESSION_SGILOG24, NULL, SGILOGDATAFMT_UNKNOWN, SGILOGENCODE_NODITHER, SGILOGENCODE_RANDITHER, and tiff::tif_data.

◆ uv_decode()

int uv_decode	(	double *	up,
		double *	vp,
		int	c
	)

Definition at line 836 of file tif_luv.c.

References UV_NDIVS, and UV_NVS.