diff options
Diffstat (limited to 'cg-sleepmode.c')
| -rw-r--r-- | cg-sleepmode.c | 443 |
1 files changed, 443 insertions, 0 deletions
diff --git a/cg-sleepmode.c b/cg-sleepmode.c new file mode 100644 index 0000000..67b5570 --- /dev/null +++ b/cg-sleepmode.c @@ -0,0 +1,443 @@ +/* See LICENSE file for copyright and license details. */ +#include "cg-base.h" + +#include <libclut.h> + +#if defined(_GNU_SOURCE) +# undef _GNU_SOURCE +#endif +#include <errno.h> +#include <sched.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> + + + +/** + * The default filter priority for the program + */ +const int64_t default_priority = (int64_t)3 << 59; + +/** + * The default class for the program + */ +char default_class[] = PKGNAME "::cg-sleepmode::standard"; + +/** + * Class suffixes + */ +const char* const* class_suffixes = (const char* const[]){NULL}; + + + +/** + * -r: fade-out time for the red channel + */ +static char* rflag; + +/** + * -g: fade-out time for the green channel + */ +static char* gflag; + +/** + * -b: fade-out time for the blue channel + */ +static char* bflag; + +/** + * The duration, in seconds, of the red channel's fade out + */ +static double red_time = 3; + +/** + * The duration, in seconds, of the green channel's fade out + */ +static double green_time = 2; + +/** + * The duration, in seconds, of the blue channel's fade out + */ +static double blue_time = 1; + +/** + * The luminosity of red channel after the fade out + */ +static double red_target = 0.5; + +/** + * The luminosity of green channel after the fade out + */ +static double green_target = 0; + +/** + * The luminosity of blue channel after the fade out + */ +static double blue_target = 0; + +/** + * Time to fade in? + */ +static volatile sig_atomic_t received_int = 0; + + + +/** + * Print usage information and exit + */ +void usage(void) +{ + fprintf(stderr, + "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] [-p priority] " + "[-r red-fadeout-time] [-g green-fadeout-time] [-b blue-fadeout-time] " + "[red-luminosity [green-luminosity [blue-luminosity]]]\n", + argv0); + exit(1); +} + + +/** + * Called when a signal is received + * that tells the program to terminate + * + * @param signo The received signal + */ +static void sig_int(int signo) +{ + received_int = 1; + (void) signo; +} + + +/** + * 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) +{ + if (opt[0] == '-') + switch (opt[1]) + { + case 'r': + if (rflag || !(rflag = arg)) + usage(); + return 1; + case 'g': + if (gflag || !(gflag = arg)) + usage(); + return 1; + case 'b': + if (bflag || !(bflag = arg)) + usage(); + return 1; + default: + usage(); + } + else + usage(); + return 0; +} + + +/** + * 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* restrict out, const char* restrict 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; +} + + +/** + * 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) +{ + int q = (rflag || gflag || bflag || argc); + if ((q > 1) || (argc > 3)) + usage(); + if (rflag != NULL) + if (parse_double(&red_time, rflag) < 0) + usage(); + if (gflag != NULL) + if (parse_double(&green_time, gflag) < 0) + usage(); + if (bflag != NULL) + if (parse_double(&blue_time, bflag) < 0) + usage(); + if (argc >= 1) + if (parse_double(&red_target, argv[0]) < 0) + usage(); + if (argc >= 2) + if (parse_double(&green_target, argv[1]) < 0) + usage(); + if (argc >= 3) + if (parse_double(&blue_target, argv[2]) < 0) + usage(); + if (red_target >= 1) + red_time = 0; + if (green_target >= 1) + green_time = 0; + if (blue_target >= 1) + blue_time = 0; + return 0; + (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_rgb_brightness(&(filter->ramps.MEMBER), MAX, TYPE, red, green, blue);\ + break; +LIST_DEPTHS +#undef X + default: + abort(); + } +} + + +/** + * Get the current monotonic time as a double + * + * @param now Output parameter for the current time (monotonic) + * @return Zero on success, -1 on error + */ +static int double_time(double* restrict now) +{ +#ifndef CLOCK_MONOTONIC_RAW +# define CLOCK_MONOTONIC_RAW CLOCK_MONOTONIC +#endif + struct timespec ts; + if (clock_gettime(CLOCK_MONOTONIC_RAW, &ts) < 0) + return -1; + *now = (double)(ts.tv_nsec); + *now /= 1000000000L; + *now += (double)(ts.tv_sec); + return 0; +} + + +/** + * 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, fade_red, fade_green, fade_blue; + size_t i, j; + double t, starttime, red, green, blue, redt, greent, bluet; + + redt = (red_target - 1) / red_time; + greent = (green_target - 1) / green_time; + bluet = (blue_target - 1) / blue_time; + fade_red = !isinf(redt) && !isnan(redt); + fade_green = !isinf(greent) && !isnan(greent); + fade_blue = !isinf(bluet) && !isnan(bluet); + + for (i = 0; i < filters_n; i++) + crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH; + + if ((r = make_slaves()) < 0) + return r; + + if ((r = double_time(&starttime)) < 0) + return r; + + red = red_target < 0 ? 0 : red_target > 1 ? 1 : red_target; + green = green_target < 0 ? 0 : green_target > 1 ? 1 : green_target; + blue = blue_target < 0 ? 0 : blue_target > 1 ? 1 : blue_target; + + for (;;) + { + if ((r = double_time(&t)) < 0) + return r; + t -= starttime; + if (fade_red) + {if (red = 1 + t * redt, red > 1) red = 1; else if (red < 0) red = 0;} + if (fade_green) + {if (green = 1 + t * greent, green > 1) green = 1; else if (green < 0) green = 0;} + if (fade_blue) + {if (blue = 1 + t * bluet, blue > 1) blue = 1; else if (blue < 0) blue = 0;} + + 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); + r = update_filter(i, 0); + if ((r == -2) || ((r == -1) && (errno != EAGAIN))) + return r; + if (crtc_updates[i].slaves != NULL) + for (j = 0; crtc_updates[i].slaves[j] != 0; j++) + { + r = update_filter(crtc_updates[i].slaves[j], 0); + if ((r == -2) || ((r == -1) && (errno != EAGAIN))) + return r; + } + } + + while (r != 1) + if ((r = synchronise(-1)) < 0) + return r; + + sched_yield(); + + if ((t >= red_time) && (t >= green_time) && (t >= blue_time)) + break; + } + + if ((signal(SIGINT, sig_int) == SIG_ERR) || + (signal(SIGTERM, sig_int) == SIG_ERR) || + (signal(SIGHUP, sig_int) == SIG_ERR)) + return -1; + + if (libcoopgamma_set_nonblocking(&cg, 0) < 0) + return -1; + for (;;) + if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0) + { + if (received_int) + goto fade_in; + switch (errno) + { + case 0: + break; + case ENOTRECOVERABLE: + goto enotrecoverable; + default: + return 1; + } + } + + fade_in: + if (libcoopgamma_set_nonblocking(&cg, 1) < 0) + return -1; + + t = red_time; + t = t > green_time ? t : green_time; + t = t > blue_time ? t : blue_time; + redt = t - red_time; + greent = t - green_time; + bluet = t - blue_time; + t = red_time + green_time + blue_time; + if (red_time > 0) + t = t < red_time ? t : red_time; + if (green_time > 0) + t = t < green_time ? t : green_time; + if (blue_time > 0) + t = t < blue_time ? t : blue_time; + red_time = t + redt; + green_time = t + greent; + blue_time = t + bluet; + + red = green = blue = 1; + + if ((r = double_time(&starttime)) < 0) + return r; + + for (;;) + { + if ((r = double_time(&t)) < 0) + return r; + t -= starttime; + redt = t / red_time; + greent = t / green_time; + bluet = t / blue_time; + if (!isinf(redt) && !isnan(redt)) + { + red = red_target * (1 - redt) + redt; + if (red > 1) red = 1; else if (red < 0) red = 0; + } + if (!isinf(greent) && !isnan(greent)) + { + green = green_target * (1 - greent) + greent; + if (green > 1) green = 1; else if (green < 0) green = 0; + } + if (!isinf(bluet) && !isnan(bluet)) + { + blue = blue_target * (1 - bluet) + bluet; + if (blue > 1) blue = 1; else if (blue < 0) blue = 0; + } + + 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); + r = update_filter(i, 0); + if ((r == -2) || ((r == -1) && (errno != EAGAIN))) + return r; + if (crtc_updates[i].slaves != NULL) + for (j = 0; crtc_updates[i].slaves[j] != 0; j++) + { + r = update_filter(crtc_updates[i].slaves[j], 0); + if ((r == -2) || ((r == -1) && (errno != EAGAIN))) + return r; + } + } + + while (r != 1) + if ((r = synchronise(-1)) < 0) + return r; + + sched_yield(); + + if ((t >= red_time) && (t >= green_time) && (t >= blue_time)) + break; + } + + return 0; + enotrecoverable: + for (;;) + if (pause() < 0) + return -1; +} |