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/* redshift.h -- Main program header
This file is part of Redshift.
Redshift is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Redshift is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Redshift. If not, see <http://www.gnu.org/licenses/>.
Copyright (c) 2013-2017 Jon Lund Steffensen <jonlst@gmail.com>
*/
#ifndef REDSHIFT_REDSHIFT_H
#define REDSHIFT_REDSHIFT_H
#include <stdio.h>
#include <stdlib.h>
/* The color temperature when no adjustment is applied. */
#define NEUTRAL_TEMP 6500
/* Location */
typedef struct {
float lat;
float lon;
} location_t;
/* Periods of day. */
typedef enum {
PERIOD_NONE = 0,
PERIOD_DAYTIME,
PERIOD_NIGHT,
PERIOD_TRANSITION
} period_t;
/* Color setting */
typedef struct {
int temperature;
float gamma[3];
float brightness;
} color_setting_t;
/* Program modes. */
typedef enum {
PROGRAM_MODE_CONTINUAL,
PROGRAM_MODE_ONE_SHOT,
PROGRAM_MODE_PRINT,
PROGRAM_MODE_RESET,
PROGRAM_MODE_MANUAL
} program_mode_t;
/* Time range.
Fields are offsets from midnight in seconds. */
typedef struct {
int start;
int end;
} time_range_t;
/* Transition scheme.
The solar elevations at which the transition begins/ends,
and the association color settings. */
typedef struct {
double high;
double low;
int use_time; /* When enabled, ignore elevation and use time ranges. */
time_range_t dawn;
time_range_t dusk;
color_setting_t day;
color_setting_t night;
} transition_scheme_t;
/* Gamma adjustment method */
typedef struct gamma_state gamma_state_t;
typedef int gamma_method_init_func(gamma_state_t **state);
typedef int gamma_method_start_func(gamma_state_t *state);
typedef void gamma_method_free_func(gamma_state_t *state);
typedef void gamma_method_print_help_func(FILE *f);
typedef int gamma_method_set_option_func(gamma_state_t *state, const char *key,
const char *value);
typedef void gamma_method_restore_func(gamma_state_t *state);
typedef int gamma_method_set_temperature_func(
gamma_state_t *state, const color_setting_t *setting, int preserve);
typedef struct {
char *name;
/* If true, this method will be tried if none is explicitly chosen. */
int autostart;
/* Initialize state. Options can be set between init and start. */
gamma_method_init_func *init;
/* Allocate storage and make connections that depend on options. */
gamma_method_start_func *start;
/* Free all allocated storage and close connections. */
gamma_method_free_func *free;
/* Print help on options for this adjustment method. */
gamma_method_print_help_func *print_help;
/* Set an option key, value-pair */
gamma_method_set_option_func *set_option;
/* Restore the adjustment to the state before start was called. */
gamma_method_restore_func *restore;
/* Set a specific color temperature. */
gamma_method_set_temperature_func *set_temperature;
} gamma_method_t;
/* Location provider */
typedef struct location_state location_state_t;
typedef int location_provider_init_func(location_state_t **state);
typedef int location_provider_start_func(location_state_t *state);
typedef void location_provider_free_func(location_state_t *state);
typedef void location_provider_print_help_func(FILE *f);
typedef int location_provider_set_option_func(
location_state_t *state, const char *key, const char *value);
typedef int location_provider_get_fd_func(location_state_t *state);
typedef int location_provider_handle_func(
location_state_t *state, location_t *location, int *available);
typedef struct {
char *name;
/* Initialize state. Options can be set between init and start. */
location_provider_init_func *init;
/* Allocate storage and make connections that depend on options. */
location_provider_start_func *start;
/* Free all allocated storage and close connections. */
location_provider_free_func *free;
/* Print help on options for this location provider. */
location_provider_print_help_func *print_help;
/* Set an option key, value-pair. */
location_provider_set_option_func *set_option;
/* Listen and handle location updates. */
location_provider_get_fd_func *get_fd;
location_provider_handle_func *handle;
} location_provider_t;
#endif /* ! REDSHIFT_REDSHIFT_H */
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