/* See LICENSE file for copyright and license details. */ #include "cg-base.h" #include #include #include #include #include #include #include #include /** * The default filter priority for the program */ const int64_t default_priority = (int64_t)7 << 61; /** * The default class for the program */ char default_class[] = "radharc::radharc::standard"; /** * Class suffixes */ const char *const *class_suffixes = (const char *const[]){NULL}; /** * The effect fade-in time, in centiseconds */ static unsigned long int fade_in_cs = 0; /** * The effect fade-out time, in centiseconds */ static unsigned long int fade_out_cs = 0; /** * The highest elevation of the Sun where the lowest * colour temperature is applied */ static double low_elev = -6; /** * The lowest colour temperature that may be applied */ static double low_temp = 2500; /** * The lowest elevation of the Sun where the highest * colour temperature is applied */ static double high_elev = 3; /** * The highest colour temperature that may be applied */ static double high_temp = 5000; /** * The temperature choosen with the -f flag, negative if none */ static double choosen_temperature = -1; /** * The latitude coordiate of the GPS coordiates of * the user's location */ static double latitude; /** * The longitude coordiate of the GPS coordiates of * the user's location */ static double longitude; /** * Whether the user's location has been specified */ static int have_location = 0; /** * Whether the -d flag (keep process running and remove * effect when killed) has been specified */ static int dflag = 0; /** * Whether the -x flag (remove applied effect) * has been specified */ static int xflag = 0; /** * If 0, SIGINT has not been received, * if 1, SIGINT has been received once as the effect * should be faded out and then the effect should * be removed and the program terminated, * if 2, SIGINT has been received at least twice and * the effect should be removed immediately * and the program terminated */ static volatile sig_atomic_t sigint_received = 0; /** * If 0, SIGHUP has not been received, * if 1, SIGHUP has been received and the effect * shall be made `LIBCOOPGAMMA_UNTIL_REMOVAL` and * the program terminated */ static volatile sig_atomic_t sighup_received = 0; /** * Print usage information and exit */ void usage(void) { fprintf(stderr, "usage: %s [-M method] [-S site] [-c crtc] ... [-R rule] [-p priority]" " [-f fade-in] [-F fade-out] [-h [high-temp][@high-elev]] [-l [low-temp][@low-elev]]" " (-L latitude:longitude | -t temperature [-d] | -x)\n", argv0); exit(1); } /** * Parse a non-negative double encoded as a string * * @param out Output parameter for the value * @param str The string * @return Zero on success, -1 if the string is invalid */ static int parse_double(double *out, const char *str) { char *end; errno = 0; *out = strtod(str, &end); if (errno || *out < 0 || isinf(*out) || isnan(*out) || *end) return -1; if (!*str || !strchr("0123456789.", *str)) return -1; return 0; } /** * Handle a command line option * * @param opt The option, it is a NUL-terminate two-character * string starting with either '-' or '+', if the * argument is not recognised, call `usage`. This * string will not be "-M", "-S", "-c", "-p", or "-R". * @param arg The argument associated with `opt`, * `NULL` there is no next argument, if this * parameter is `NULL` but needed, call `usage` * @return 0 if `arg` was not used, * 1 if `arg` was used, * -1 on error */ int handle_opt(char *opt, char *arg) { double t; char *p; if (opt[0] == '-') { switch (opt[1]) { case 'd': dflag = 1; xflag = 0; break; case 'f': if (parse_double(&t, arg)) usage(); fade_in_cs = (unsigned long int)(t * 100 + 0.5); return 1; case 'F': if (parse_double(&t, arg)) usage(); fade_out_cs = (unsigned long int)(t * 100 + 0.5); return 1; case 'h': p = strchr(arg, '@'); if (p) *p++ = '\0'; if (*arg && parse_double(&high_temp, arg)) usage(); if (p && parse_double(&high_elev, p)) usage(); return 1; case 'l': p = strchr(arg, '@'); if (p) *p++ = '\0'; if (*arg && parse_double(&low_temp, arg)) usage(); if (p && parse_double(&low_elev, p)) usage(); return 1; case 'L': p = strchr(arg, ':'); if (!p) usage(); *p++ = '\0'; if (parse_double(&latitude, arg) || latitude < -90 || latitude > 90) usage(); if (parse_double(&longitude, p) || longitude < -180 || longitude > 180) usage(); choosen_temperature = -1; have_location = 1; dflag = 0; xflag = 0; return 1; case 't': if (parse_double(&choosen_temperature, arg)) usage(); xflag = 0; return 1; case 'x': xflag = 1; dflag = 0; break; default: usage(); } } else { usage(); } return 0; } /** * This function is called after the last * call to `handle_opt` * * @param argc The number of unparsed arguments * @param argv `NULL` terminated list of unparsed arguments * @param prio The argument associated with the "-p" option * @return Zero on success, -1 on error */ int handle_args(int argc, char *argv[], char *prio) { if (argc || (!xflag && !have_location && choosen_temperature < 0)) usage(); return 0; (void) argv; (void) prio; } /** * Fill a filter * * @param filter The filter to fill * @param red The red brightness * @param green The green brightness * @param blue The blue brightness */ static void fill_filter(libcoopgamma_filter_t *restrict filter, double red, double green, double blue) { switch (filter->depth) { #define X(CONST, MEMBER, MAX, TYPE)\ case CONST:\ libclut_start_over(&(filter->ramps.MEMBER), MAX, TYPE, 1, 1, 1);\ libclut_linearise(&(filter->ramps.MEMBER), MAX, TYPE, 1, 1, 1);\ libclut_rgb_brightness(&(filter->ramps.MEMBER), MAX, TYPE, red, green, blue);\ libclut_standardise(&(filter->ramps.MEMBER), MAX, TYPE, 1, 1, 1);\ break; LIST_DEPTHS #undef X default: abort(); } } /** * Set the gamma ramps * * @param red The red brightness * @param green The green brightness * @param blue The blue brightness * @return 0: Success * -1: Error, `errno` set * -2: Error, `cg.error` set * -3: Error, message already printed */ static int set_ramps(double red, double green, double blue) { int r; size_t i, j; libclut_model_standard_to_linear(&red, &green, &blue); for (i = 0, r = 1; i < filters_n; i++) { if (!crtc_updates[i].master || !crtc_info[crtc_updates[i].crtc].supported) continue; fill_filter(&crtc_updates[i].filter, red, green, blue); do { r = update_filter(i, 0); } while (r == -1 && errno == EINTR); if (r == -2 || (r == -1 && errno != EAGAIN)) return r; if (crtc_updates[i].slaves) { for (j = 0; crtc_updates[i].slaves[j] != 0; j++) { do { r = update_filter(crtc_updates[i].slaves[j], 0); } while (r == -1 && errno == EINTR); if (r == -2 || (r == -1 && errno != EAGAIN)) return r; } } } while (r != 1) if ((r = synchronise(-1)) < 0) if (r != -1 || errno != EINTR) return r; return 0; } /** * Get the colour temperature for the current time * * @param tp Output parameter for the colour temperature * @return 0 on success, -1 on failure */ static int get_temperature(double *tp) { if (choosen_temperature < 0) { if (libred_solar_elevation(latitude, longitude, tp)) return -1; if (*tp < low_elev) *tp = low_elev; if (*tp > high_elev) *tp = high_elev; *tp = (*tp - low_elev) / (high_elev - low_elev); *tp = low_temp + *tp * (high_temp - low_temp); } else { *tp = choosen_temperature; } return 0; } /** * Called when SIGINT is received * * @param sig Always `SIGINT` */ static void sigint_handler(int sig) { (void) sig; sigint_received = sigint_received ? 2 : 1; } /** * Called when SIGHUP is received * * @param sig Always `SIGHUP` */ static void sighup_handler(int sig) { (void) sig; sighup_received = 1; } /** * The main function for the program-specific code * * @return 0: Success * -1: Error, `errno` set * -2: Error, `cg.error` set * -3: Error, message already printed */ int start(void) { int r, tfd; size_t i; double target_temperature; long int original_temperature; long int current_temperature = 6500; double red = 1, green = 1, blue = 1; uint64_t overrun; struct sigaction sa; struct timespec sleep_timeout; const char *side; memset(&sa, 0, sizeof(sa)); sa.sa_handler = &sigint_handler; sigaction(SIGINT, &sa, NULL); sa.sa_handler = &sighup_handler; sigaction(SIGHUP, &sa, NULL); if (xflag) for (i = 0; i < filters_n; i++) crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE; else if (choosen_temperature >= 0 && !dflag) for (i = 0; i < filters_n; i++) crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_REMOVAL; else for (i = 0; i < filters_n; i++) crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH; if (!xflag) if (choosen_temperature < 0) dflag = 1; if (xflag) return set_ramps(1, 1, 1); if ((r = make_slaves()) < 0) return r; if (!fade_in_cs) goto no_fade_in; tfd = timerfd_create(CLOCK_MONOTONIC, 0); if (tfd < 0) return -1; if (timerfd_settime(tfd, 0, &(struct itimerspec){{0, 10000000L}, {0, 10000000L}}, NULL)) return -1; for (i = 0; i < (size_t)fade_in_cs;) { if (sigint_received) { double cs = (double)i / fade_in_cs * fade_out_cs + 0.5; fade_out_cs = (unsigned long int)cs; goto fade_out_have_timer; } if (i % 600 == 0) if ((r = get_temperature(&target_temperature)) < 0) return r; current_temperature = (long int)(6500 - (6500 - target_temperature) * i / fade_in_cs); if (libred_get_colour(current_temperature, &red, &green, &blue)) return -1; if ((r = set_ramps(red, green, blue)) < 0) return r; while (read(tfd, &overrun, sizeof(overrun)) != sizeof(overrun)) { if (errno == EINTR) continue; return -1; } if (overrun > fade_in_cs - i) overrun = fade_in_cs - i; i += overrun; } close(tfd); no_fade_in: for (;;) { if (sigint_received) goto fade_out; if (sighup_received) { for (i = 0; i < filters_n; i++) crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_REMOVAL; return set_ramps(red, green, blue); } if ((r = get_temperature(&target_temperature)) < 0) return r; current_temperature = (long int)target_temperature; if (libred_get_colour(current_temperature, &red, &green, &blue)) return -1; if ((r = set_ramps(red, green, blue)) < 0) return r; if (!dflag) return 0; sleep_timeout.tv_sec = 6; sleep_timeout.tv_nsec = 0; while ((errno = clock_nanosleep(CLOCK_BOOTTIME, 0, &sleep_timeout, &sleep_timeout))) { if (errno == EINTR) { if (sigint_received || sighup_received) break; continue; } return -1; } } fade_out: tfd = timerfd_create(CLOCK_MONOTONIC, 0); if (tfd < 0) goto fade_out_fail; if (timerfd_settime(tfd, 0, &(struct itimerspec){{0, 10000000L}, {0, 10000000L}}, NULL)) goto fade_out_fail; fade_out_have_timer: original_temperature = current_temperature; for (i = 0; i < (size_t)fade_out_cs;) { if (sigint_received > 1) break; current_temperature = original_temperature + (double)(6500 - original_temperature) * i / fade_out_cs; if (libred_get_colour(current_temperature, &red, &green, &blue)) goto fade_out_fail; if ((r = set_ramps(red, green, blue)) < 0) goto fade_out_fail_use_r; while (read(tfd, &overrun, sizeof(overrun)) != sizeof(overrun)) { if (errno == EINTR) continue; goto fade_out_fail; } if (overrun > fade_in_cs - i) overrun = fade_in_cs - i; i += overrun; } close(tfd); for (i = 0; i < filters_n; i++) crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE; return set_ramps(1, 1, 1); fade_out_fail_use_r: switch (r) { case -1: fade_out_fail: perror(argv0); break; case -2: side = cg.error.server_side ? "server" : "client"; if (cg.error.custom) { if (cg.error.number && cg.error.description) { fprintf(stderr, "%s: %s-side error number %" PRIu64 ": %s\n", argv0, side, cg.error.number, cg.error.description); } else if (cg.error.number) { fprintf(stderr, "%s: %s-side error number %" PRIu64 "\n", argv0, side, cg.error.number); } else if (cg.error.description) { fprintf(stderr, "%s: %s-side error: %s\n", argv0, side, cg.error.description); } } else if (cg.error.description) { fprintf(stderr, "%s: %s-side error: %s\n", argv0, side, cg.error.description); } else { fprintf(stderr, "%s: %s-side error: %s\n", argv0, side, strerror((int)cg.error.number)); } break; default: break; } for (i = 0; i < filters_n; i++) crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE; r = set_ramps(1, 1, 1); return r ? r : -3; }