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/* common.h -- Common header file for Redshift source files
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) 2009-2017 Jon Lund Steffensen <jonlst@gmail.com>
Copyright (c) 2014, 2015, 2016, 2025 Mattias Andrée <m@maandree.se>
*/
#ifndef REDSHIFT_COMMON_H
#define REDSHIFT_COMMON_H
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#if !defined(__WIN32__)
# include <signal.h>
#endif
/* 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, program_mode_t mode);
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;
#define LIST_RAMPS_STOP_VALUE_TYPES\
X(u8, uint8_t, UINT8_MAX + 1ULL, UINT8_MAX, 8)\
X(u16, uint16_t, UINT16_MAX + 1ULL, UINT16_MAX, 16)\
X(u32, uint32_t, UINT32_MAX + 1ULL, UINT32_MAX, 32)\
X(u64, uint64_t, UINT64_MAX, UINT64_MAX, 64)\
X(float, float, 1, 1, -1)\
X(double, double, 1, 1, -2)
#define X(SUFFIX, TYPE, MAX, TRUE_MAX, DEPTH)\
void colorramp_fill_##SUFFIX(TYPE *gamma_r, TYPE *gamma_g, TYPE *gamma_b,\
size_t size_r, size_t size_g, size_t size_b,\
const color_setting_t *setting);
LIST_RAMPS_STOP_VALUE_TYPES
#undef X
void hooks_signal_period_change(period_t prev_period,
period_t period);
int pipeutils_create_nonblocking(int pipefds[2]);
void pipeutils_signal(int write_fd);
void pipeutils_handle_signal(int read_fd);
#if !defined(__WIN32__)
extern volatile sig_atomic_t exiting;
extern volatile sig_atomic_t disable;
#else
extern int exiting;
extern int disable;
#endif
int signals_install_handlers(void);
int systemtime_get_time(double *now);
void systemtime_msleep(unsigned int msecs);
extern const gamma_method_t dummy_gamma_method;
#ifdef ENABLE_COOPGAMMA
extern const gamma_method_t coopgamma_gamma_method;
#endif
#ifdef ENABLE_RANDR
extern const gamma_method_t randr_gamma_method;
#endif
#ifdef ENABLE_VIDMODE
extern const gamma_method_t vidmode_gamma_method;
#endif
#ifdef ENABLE_DRM
extern const gamma_method_t drm_gamma_method;
#endif
#ifdef ENABLE_QUARTZ
extern const gamma_method_t quartz_gamma_method;
#endif
#ifdef ENABLE_W32GDI
extern const gamma_method_t w32gdi_gamma_method;
#endif
extern const location_provider_t manual_location_provider;
#ifdef ENABLE_GEOCLUE2
extern const location_provider_t geoclue2_location_provider;
#endif
#ifdef ENABLE_CORELOCATION
extern const location_provider_t corelocation_location_provider;
#endif
#endif
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