aboutsummaryrefslogtreecommitdiffstats
path: root/src/cg-rainbow.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--src/cg-rainbow.c278
1 files changed, 278 insertions, 0 deletions
diff --git a/src/cg-rainbow.c b/src/cg-rainbow.c
new file mode 100644
index 0000000..93009f9
--- /dev/null
+++ b/src/cg-rainbow.c
@@ -0,0 +1,278 @@
+/**
+ * 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>
+
+#include <errno.h>
+#include <math.h>
+#include <sched.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)1) << 60;
+
+/**
+ * The default class for the program
+ */
+char* const default_class = PKGNAME "::cg-rainbow::standard";
+
+
+
+/**
+ * -s: rainbow-frequency in Hz
+ */
+static char* sflag = NULL;
+
+/**
+ * -l: base luminosity
+ */
+static char* lflag = NULL;
+
+/**
+ * The rainbow-frequency multiplied by 3
+ */
+double rainbows_per_third_second = 1;
+
+/**
+ * The base luminosity
+ */
+double luminosity = (double)1 / 3;
+
+
+
+/**
+ * Print usage information and exit
+ */
+void usage(void)
+{
+ fprintf(stderr,
+ "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] [-p priority] "
+ " [-l luminosity] [-s rainbowhz]\n",
+ argv0);
+ exit(1);
+}
+
+
+/**
+ * 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 'l':
+ if (lflag || !(lflag = arg))
+ usage();
+ return 1;
+ case 's':
+ if (sflag || !(sflag = 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 = (lflag || sflag);
+ 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)
+ usage();
+ if (sflag != NULL)
+ {
+ if (parse_double(&rainbows_per_third_second, sflag) < 0)
+ usage();
+ rainbows_per_third_second *= 3;
+ }
+ if (lflag != NULL)
+ {
+ if (parse_double(&luminosity, lflag) < 0)
+ usage();
+ }
+ 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();
+ }
+}
+
+
+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;
+ size_t i, j;
+ double pal[3];
+ double t, starttime;
+
+ 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;
+
+ for (;;)
+ {
+ if ((r = double_time(&t)) < 0)
+ return r;
+ t -= starttime;
+ t *= rainbows_per_third_second;
+ pal[0] = pal[1] = pal[2] = luminosity;
+ pal[((long)t) % 3] += 1 - fmod(t, 1);
+ pal[((long)t + 1) % 3] += fmod(t, 1);
+ if (pal[0] > 1) pal[0] = 1;
+ if (pal[1] > 1) pal[1] = 1;
+ if (pal[2] > 1) pal[2] = 1;
+
+ 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), pal[0], pal[1], pal[2]);
+ 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();
+ }
+}
+
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-24 03:01:14 +0000