gamma.h File Reference

Gamma/temperature adjustment functions. More...

#include <stdint.h>

Data Structures
struct	gamma_s
	gamma structure More...
struct	gamma_ramp_s
	gamma ramp structure More...
struct	gamma_method_s
	Gamma method functions. More...
Defines
#define	MIN_GAMMA   0.1
	Minimum gamma value.
#define	MAX_GAMMA   10.0
	Maximum gamma value.
#define	MIN_TEMP   3400
	Minimum temperature.
#define	MAX_TEMP   7000
	Maximum temperature.
#define	DEFAULT_BRIGHTNESS   1.0f
	Default brightness.
#define	DEFAULT_DAY_TEMP   6500
	Default daytime temperature limit.
#define	DEFAULT_NIGHT_TEMP   3600
	Default nighttime temperature limit.
#define	DEFAULT_GAMMA   1.0
	Default gamma values.
Enumerations
enum	gamma_method_t {   GAMMA_METHOD_NONE, GAMMA_METHOD_AUTO, GAMMA_METHOD_RANDR, GAMMA_METHOD_VIDMODE,   GAMMA_METHOD_WINGDI, GAMMA_METHOD_MAX }
	Enum of gamma adjustment methods. More...
Functions
gamma_ramp_s	gamma_get_ramps (int size)
	Re-allocates ramps if size changed, otherwise return pointer to ramp.
gamma_ramp_s	gamma_ramp_fill (int size, int temp)
	Updates gamma ramp structure.
char *	gamma_get_method_name (gamma_method_t method)
	Retrieves method name by id.
int	gamma_find_temp (float ratio)
	Find the temperature based on red:blue ratio.
int	gamma_load_methods (void)
	Load methods available.
gamma_method_t	gamma_lookup_method (char *name)
	Looks up method by name.
gamma_method_t	gamma_init_method (int screen_num, int crtc_num, gamma_method_t method)
	Initialize gamma changing method.
int	gamma_state_restore (void)
	Restores gamma ramps to default values.
int	gamma_state_free (void)
	Free the state associated with the appropriate adjustment method.
int	gamma_calc_temp (double elevation, int temp_day, int temp_night)
	Calculate temperature based on elevation.
int	gamma_calc_curr_target_temp (float lat, float lon, int temp_day, int temp_night)
	Calculates the target temperature for now.
int	gamma_state_set_temperature (int temp, gamma_s gamma)
	Sets the temperature.
int	gamma_state_get_temperature (void)
	Retrieves current temperature.

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Detailed Description

Gamma/temperature adjustment functions.

Author:

Mao Yu,Jon Lund Steffensen

Date:

Modified: Saturday, July 10, 2010

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Enumeration Type Documentation

enum gamma_method_t

Enum of gamma adjustment methods.

Enumerator:

GAMMA_METHOD_NONE	No method defined
GAMMA_METHOD_AUTO	Try all methods
GAMMA_METHOD_RANDR	Linux RANDR
GAMMA_METHOD_VIDMODE	Linux VidMode
GAMMA_METHOD_WINGDI	Win32 GDI
GAMMA_METHOD_MAX	Tracks the highest value