gamma.h File Reference

#include "maxheap.h"
#include <WTypes.h>
#include "maxtypes.h"
#include "coreexp.h"
#include "geom/color.h"

Classes
class	GammaMgr
class	GamConvert16
class	GamConvert8

Macros
#define	WRDMAX   65535
#define	FWRDMAX   65535.0f
#define	RCBITS   13
#define	RCOLN   (1<<RCBITS)
#define	RCMAX   (RCOLN-1)
#define	FRCMAX   ((float)RCMAX)
#define	RCHALF   (RCOLN>>1)
#define	RCSH   (RCBITS-8) /* shift amount from 8 bit to RCBITS */
#define	RCSH16   (16-RCBITS) /* shift amount from 16 bit to RCBITS */
#define	RCFRACMASK   ((ulong)((1<<RCSH)-1))
#define	RC_SCL   (1<<RCSH)
#define	RC_SCLHALF   (1<<(RCSH-1))
#define	FRC_SCL   ((float)RC_SCL)
#define	RCSHMASK   (0xffffffffL<<RCSH)
#define	RCSHMAX   (0xffL<<RCSH)
#define	GAMMA_NTSC   2.2f
#define	GAMMA_PAL   2.8f
#define	GAMMA16to8(b)   gammaMgr.disp_gamtabw[b>>RCSH16]

Functions
COLORREF	gammaCorrect (DWORD c)
UBYTE	gammaCorrect (UBYTE b)
CoreExport void	BuildGammaTab8 (UBYTE gamtab[256], float gamma, int onoff=TRUE)
CoreExport void	BuildGammaTab8 (UWORD gamtab[256], float gamma, int onoff=TRUE)
CoreExport void	BuildGammaTab (UBYTE gamtab[RCOLN], float gamma, int onoff=TRUE)
CoreExport void	BuildGammaTab (UWORD gamtab[RCOLN], float gamma, int onoff=TRUE)
CoreExport float	gammaCorrect (float v, float gamma)
CoreExport float	deGammaCorrect (float v, float gamma)
CoreExport UBYTE	gammaCorrect (UBYTE v, float gamma)
CoreExport UBYTE	deGammaCorrect (UBYTE v, float gamma)
CoreExport UWORD	gammaCorrect (UWORD c, float gamma)
CoreExport UWORD	deGammaCorrect (UWORD c, float gamma)

Variables
CoreExport GammaMgr	gammaMgr

Macro Definition Documentation

WRDMAX

#define WRDMAX   65535

FWRDMAX

#define FWRDMAX   65535.0f

RCBITS

#define RCBITS   13

RCOLN

#define RCOLN   (1<<RCBITS)

RCMAX

#define RCMAX   (RCOLN-1)

FRCMAX

#define FRCMAX   ((float)RCMAX)

RCHALF

#define RCHALF   (RCOLN>>1)

RCSH

#define RCSH   (RCBITS-8) /* shift amount from 8 bit to RCBITS */

RCSH16

#define RCSH16   (16-RCBITS) /* shift amount from 16 bit to RCBITS */

RCFRACMASK

#define RCFRACMASK   ((ulong)((1<<RCSH)-1))

RC_SCL

#define RC_SCL   (1<<RCSH)

RC_SCLHALF

#define RC_SCLHALF   (1<<(RCSH-1))

FRC_SCL

#define FRC_SCL   ((float)RC_SCL)

RCSHMASK

#define RCSHMASK   (0xffffffffL<<RCSH)

RCSHMAX

#define RCSHMAX   (0xffL<<RCSH)

GAMMA_NTSC

#define GAMMA_NTSC   2.2f

GAMMA_PAL

#define GAMMA_PAL   2.8f

GAMMA16to8

#define GAMMA16to8

(

b

)

gammaMgr.disp_gamtabw[b>>RCSH16]

Function Documentation

gammaCorrect() [1/5]

COLORREF gammaCorrect ( DWORD  c )

inline

Remarks

Returns a gamma corrected version of the specified color using the display gamma setting.

Parameters:

DWORD c

The color to gamma correct.

{ return gammaMgr.DisplayGammaCorrect(c); }

gammaCorrect() [2/5]

UBYTE gammaCorrect ( UBYTE  b )

inline

Remarks

Returns a gamma corrected version of the specified color using the display gamma setting.

Parameters:

UBYTE b

The color to gamma correct.

{ return gammaMgr.disp_gamtab[b]; }

BuildGammaTab8() [1/2]

CoreExport void BuildGammaTab8	(	UBYTE	gamtab[256],
		float	gamma,
		int	onoff = TRUE
	)

Remarks

Builds the gamma table that maps 8->8.

Parameters:

UBYTE gamtab[256]

The table to build.

float gamma

The gamma setting.

int onoff=TRUE

TRUE to enable; FALSE to disable.

BuildGammaTab8() [2/2]

CoreExport void BuildGammaTab8	(	UWORD	gamtab[256],
		float	gamma,
		int	onoff = TRUE
	)

Remarks

Builds a gamma table that maps 8->16.

Parameters:

UBYTE gamtab[256]

The table to build.

float gamma

The gamma setting.

int onoff=TRUE

TRUE to enable; FALSE to disable.

BuildGammaTab() [1/2]

CoreExport void BuildGammaTab	(	UBYTE	gamtab[RCOLN],
		float	gamma,
		int	onoff = TRUE
	)

Remarks

Build a gamma table that maps RCBITS->8.

Parameters:

UBYTE gamtab[RCOLN]

The table to build.

float gamma

The gamma setting.

int onoff=TRUE

TRUE to enable; FALSE to disable.

BuildGammaTab() [2/2]

CoreExport void BuildGammaTab	(	UWORD	gamtab[RCOLN],
		float	gamma,
		int	onoff = TRUE
	)

Remarks

Build a gamma table that maps RCBITS->16.

Parameters:

UWORD gamtab[RCOLN]

The table to build.

float gamma

The gamma setting.

int onoff=TRUE

TRUE to enable; FALSE to disable.

gammaCorrect() [3/5]

CoreExport float gammaCorrect	(	float	v,
		float	gamma
	)

Remarks

Gamma corrects the value passed using the specified gamma setting.

Parameters:

float v

The value to gamma correct.

float gamma

The gamma setting.

Returns

The gamma corrected value.

deGammaCorrect() [1/3]

CoreExport float deGammaCorrect	(	float	v,
		float	gamma
	)

Remarks

De-gamma corrects the value passed using the specified gamma setting.

Parameters:

float v

The value to de-gamma correct.

float gamma

The gamma setting.

gammaCorrect() [4/5]

CoreExport UBYTE gammaCorrect	(	UBYTE	v,
		float	gamma
	)

Remarks

Gamma corrects the value passed using the specified gamma setting.

Parameters:

UBYTE v

The value to gamma correct.

float gamma

The gamma setting.

Returns

The gamma corrected value.

deGammaCorrect() [2/3]

CoreExport UBYTE deGammaCorrect	(	UBYTE	v,
		float	gamma
	)

Remarks

De-gamma corrects the value passed using the specified gamma setting.

Parameters:

UBYTE v

The value to de-gamma correct.

float gamma

The gamma setting.

gammaCorrect() [5/5]

CoreExport UWORD gammaCorrect	(	UWORD	c,
		float	gamma
	)

Remarks

Gamma corrects the value passed using the specified gamma setting.

Parameters:

UWORD c

The value to gamma correct.

float gamma

The gamma setting.

Returns

The gamma corrected value.

deGammaCorrect() [3/3]

CoreExport UWORD deGammaCorrect	(	UWORD	c,
		float	gamma
	)

Remarks

De-gamma corrects the value passed using the specified gamma setting.

Parameters:

UWORD c

The value to de-gamma correct.

float gamma

The gamma setting.

Variable Documentation

gammaMgr

CoreExport GammaMgr gammaMgr

extern