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authorMattias Andrée <maandree@kth.se>2016-12-19 01:42:52 +0100
committerMattias Andrée <maandree@kth.se>2016-12-19 01:42:52 +0100
commit0ceaa2965c6b3bcbf61a11a9b19b8bd6db6ad84f (patch)
treee47344d4ff848de042dfc1f11d05b3165a3384c4 /src
parentdoc for next tool (diff)
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Add cg-linear
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to 'src')
-rw-r--r--src/cg-linear.c280
1 files changed, 280 insertions, 0 deletions
diff --git a/src/cg-linear.c b/src/cg-linear.c
new file mode 100644
index 0000000..9423014
--- /dev/null
+++ b/src/cg-linear.c
@@ -0,0 +1,280 @@
+/**
+ * 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/>.
+ */
+#include "cg-base.h"
+
+#include <libclut.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+
+/**
+ * The default filter priority for the program
+ */
+const int64_t default_priority = NO_DEFAULT_PRIORITY;
+
+/**
+ * The default class base for the program
+ */
+char default_class[] = PKGNAME "::cg-linear::standard";
+
+/**
+ * Class suffixes
+ */
+const char* const* class_suffixes = (const char* const[]){":start", ":stop", NULL};
+
+
+
+/**
+ * -d: keep process alive and remove filter on death
+ */
+static int dflag = 0;
+
+/**
+ * -x: remove filter rather than adding it
+ */
+static int xflag = 0;
+
+/**
+ * +r: do not touch the red channel
+ */
+static int rplus = 0;
+
+/**
+ * +g: do not touch the green channel
+ */
+static int gplus = 0;
+
+/**
+ * +b: do not touch the blue channel
+ */
+static int bplus = 0;
+
+/**
+ * The priority of the linearisation filter
+ */
+static int64_t start_priority;
+
+/**
+ * The priority of the delinearisation filter
+ */
+static int64_t stop_priority;
+
+
+
+/**
+ * Print usage information and exit
+ */
+void usage(void)
+{
+ fprintf(stderr,
+ "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule-base] "
+ "(-x | -p start-priority:stop-priority [-d] [+rgb])\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 'd':
+ if (dflag || xflag)
+ usage();
+ dflag = 1;
+ break;
+ case 'x':
+ if (xflag || dflag)
+ usage();
+ xflag = 1;
+ break;
+ default:
+ usage();
+ }
+ else
+ switch (opt[1])
+ {
+ case 'r':
+ if (rplus)
+ usage();
+ rplus = 1;
+ break;
+ case 'g':
+ if (gplus)
+ usage();
+ gplus = 1;
+ break;
+ case 'b':
+ if (bplus)
+ usage();
+ bplus = 1;
+ break;
+ default:
+ usage();
+ }
+ return 0;
+ (void) arg;
+}
+
+
+/**
+ * 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 = xflag + (dflag | rplus | gplus | bplus);
+ char *p, *end;
+ if (argc || (q > 1) || (xflag && (prio != NULL)))
+ usage();
+ if (!xflag && (prio == NULL))
+ usage();
+ if (prio != NULL)
+ {
+ p = strchr(prio, ':');
+ if (!p)
+ usage();
+ *p++ = '\0';
+ errno = 0;
+ start_priority = (size_t)strtoul(prio, &end, 10);
+ if (errno || *end || !*prio)
+ usage();
+ stop_priority = (size_t)strtoul(p, &end, 10);
+ if (errno || *end || !*prio)
+ usage();
+ p[-1] = ':';
+ }
+ return 0;
+ (void) argv;
+}
+
+
+/**
+ * Fill a filter
+ *
+ * @param filter The filter to fill
+ * @param is_start If the fitler is a linearisation filter
+ */
+static void fill_filter(libcoopgamma_filter_t* restrict filter, int is_start)
+{
+ switch (filter->depth)
+ {
+#define X(CONST, MEMBER, MAX, TYPE)\
+ case CONST:\
+ if (is_start)\
+ libclut_linearise(&(filter->ramps.MEMBER), MAX, TYPE, !rplus, !gplus, !bplus);\
+ else\
+ libclut_standardise(&(filter->ramps.MEMBER), MAX, TYPE, !rplus, !gplus, !bplus);\
+ break;
+LIST_DEPTHS
+#undef X
+ default:
+ abort();
+ }
+}
+
+
+/**
+ * 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;
+
+ if (xflag)
+ for (i = 0; i < filters_n; i++)
+ crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE;
+ else if (dflag)
+ for (i = 0; i < filters_n; i++)
+ crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
+ else
+ for (i = 0; i < filters_n; i++)
+ crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_REMOVAL;
+
+ for (i = 0, r = 1; i < filters_n; i++)
+ {
+ if (!(crtc_info[crtc_updates[i].crtc].supported))
+ continue;
+ if (!xflag) {
+ int is_start = strchr(crtc_updates[i].filter.class, '\0')[-1] == 't';
+ fill_filter(&(crtc_updates[i].filter), is_start);
+ crtc_updates[i].filter.priority = is_start ? start_priority : stop_priority;
+ }
+ r = update_filter(i, 0);
+ if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
+ return r;
+ }
+
+ while (r != 1)
+ if ((r = synchronise(-1)) < 0)
+ return r;
+
+ if (!dflag)
+ return 0;
+
+ if (libcoopgamma_set_nonblocking(&cg, 0) < 0)
+ return -1;
+ for (;;)
+ if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0)
+ switch (errno)
+ {
+ case 0:
+ break;
+ case ENOTRECOVERABLE:
+ goto enotrecoverable;
+ default:
+ return -1;
+ }
+
+ enotrecoverable:
+ for (;;)
+ if (pause() < 0)
+ return -1;
+}
+