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-rw-r--r--src/cg-sleepmode.c466
1 files changed, 466 insertions, 0 deletions
diff --git a/src/cg-sleepmode.c b/src/cg-sleepmode.c
new file mode 100644
index 0000000..bfb88a0
--- /dev/null
+++ b/src/cg-sleepmode.c
@@ -0,0 +1,466 @@
+/**
+ * cg-tools -- Cooperative gamma-enabled tools
+ * Copyright (C) 2016 Mattias Andrée (maandree@kth.se)
+ *
+ * This program 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.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#define _DEFAULT_SOURCE
+#define _BSD_SOURCE
+#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* const default_class = PKGNAME "::cg-sleepmode::standard";
+
+
+
+/**
+ * -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] [-r 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
+ * @retunr 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 (!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 method The argument associated with the "-M" option
+ * @param site The argument associated with the "-S" option
+ * @param crtcs The arguments associated with the "-c" options, `NULL`-terminated
+ * @param prio The argument associated with the "-p" option
+ * @param rule The argument associated with the "-R" option
+ * @return Zero on success, -1 on error
+ */
+int handle_args(int argc, char* argv[], char* method, char* site,
+ char** crtcs, char* prio, char* rule)
+{
+ int q = (rflag || gflag || bflag || argc);
+ q += (method != NULL) && !strcmp(method, "?");
+ q += (prio != NULL) && !strcmp(prio, "?");
+ q += (rule != NULL) && (!strcmp(rule, "?") || !strcmp(rule, "??"));
+ for (; *crtcs; crtcs++)
+ q += !strcmp(*crtcs, "?");
+ 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;
+}
+
+
+/**
+ * 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 < crtcs_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 < crtcs_n; i++)
+ {
+ if (!(crtc_updates[i].master) || !(crtc_info[i].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 < crtcs_n; i++)
+ {
+ if (!(crtc_updates[i].master) || !(crtc_info[i].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;
+}
+
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