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-rw-r--r--cg-brilliance.c296
1 files changed, 296 insertions, 0 deletions
diff --git a/cg-brilliance.c b/cg-brilliance.c
new file mode 100644
index 0000000..8ed3124
--- /dev/null
+++ b/cg-brilliance.c
@@ -0,0 +1,296 @@
+/* See LICENSE file for copyright and license details. */
+#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 = (int64_t)1 << 61;
+
+/**
+ * The default class for the program
+ */
+char default_class[] = PKGNAME "::cg-brilliance::standard";
+
+/**
+ * Class suffixes
+ */
+const char* const* class_suffixes = (const char* const[]){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;
+
+/**
+ * The brilliance of the red channel
+ */
+static double rvalue = 0;
+
+/**
+ * The brilliance of the green channel
+ */
+static double gvalue = 0;
+
+/**
+ * The brilliance of the blue channel
+ */
+static double bvalue = 0;
+
+
+
+/**
+ * Print usage information and exit
+ */
+void usage(void)
+{
+ fprintf(stderr,
+ "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] "
+ "(-x | [-p priority] [-d] (all | red green blue))\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
+ usage();
+ return 0;
+ (void) arg;
+}
+
+
+/**
+ * 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)
+{
+ char* red = NULL;
+ char* green = NULL;
+ char* blue = NULL;
+ int q = xflag + dflag;
+ if ((q > 1) || (xflag && (prio != NULL || argc)))
+ usage();
+ if (argc == 1)
+ red = green = blue = argv[0];
+ else if (argc == 3)
+ {
+ red = argv[0];
+ green = argv[1];
+ blue = argv[2];
+ }
+ else if (argc || !xflag)
+ usage();
+ if (argc)
+ {
+ if (parse_double(&rvalue, red) < 0)
+ usage();
+ if (parse_double(&gvalue, blue) < 0)
+ usage();
+ if (parse_double(&bvalue, green) < 0)
+ usage();
+ }
+ return 0;
+}
+
+
+/**
+ * Fill a filter
+ *
+ * @param filter The filter to fill
+ */
+static void fill_filter(libcoopgamma_filter_t* restrict filter)
+{
+ size_t i;
+ switch (filter->depth)
+ {
+#define X(CONST, MAX, TYPE, MEMBER) \
+ case CONST: \
+ for (i = 0; i < filter->ramps.MEMBER.red_size; i++) \
+ { \
+ double val = (double)(filter->ramps.MEMBER.red[i]); \
+ val *= rvalue; \
+ if (val < 0) filter->ramps.MEMBER.red[i] = 0; \
+ else if (val > (double)(MAX)) filter->ramps.MEMBER.red[i] = MAX; \
+ else filter->ramps.MEMBER.red[i] = (TYPE)val; \
+ } \
+ for (i = 0; i < filter->ramps.MEMBER.green_size; i++) \
+ { \
+ double val = (double)(filter->ramps.MEMBER.green[i]); \
+ val *= gvalue; \
+ if (val < 0) filter->ramps.MEMBER.green[i] = 0; \
+ else if (val > (double)(MAX)) filter->ramps.MEMBER.green[i] = MAX; \
+ else filter->ramps.MEMBER.green[i] = (TYPE)val; \
+ } \
+ for (i = 0; i < filter->ramps.MEMBER.blue_size; i++) \
+ { \
+ double val = (double)(filter->ramps.MEMBER.blue[i]); \
+ val *= bvalue; \
+ if (val < 0) filter->ramps.MEMBER.blue[i] = 0; \
+ else if (val > (double)(MAX)) filter->ramps.MEMBER.blue[i] = MAX; \
+ else filter->ramps.MEMBER.blue[i] = (TYPE)val; \
+ } \
+ break
+ X(LIBCOOPGAMMA_UINT8, UINT8_MAX, uint8_t, u8);
+ X(LIBCOOPGAMMA_UINT16, UINT16_MAX, uint16_t, u16);
+ X(LIBCOOPGAMMA_UINT32, UINT32_MAX, uint32_t, u32);
+ X(LIBCOOPGAMMA_UINT64, UINT64_MAX, uint64_t, u64);
+#undef X
+ case LIBCOOPGAMMA_FLOAT:
+ libclut_rgb_brightness(&(filter->ramps.f), (float)1, float, rvalue, gvalue, bvalue);
+ libclut_clip(&(filter->ramps.f), (float)1, float, 1, 1, 1);
+ break;
+ case LIBCOOPGAMMA_DOUBLE:
+ libclut_rgb_brightness(&(filter->ramps.d), (double)1, double, rvalue, gvalue, bvalue);
+ libclut_clip(&(filter->ramps.d), (double)1, double, 1, 1, 1);
+ break;
+ 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;
+
+ if (!xflag)
+ if ((r = make_slaves()) < 0)
+ return r;
+
+ for (i = 0, r = 1; i < filters_n; i++)
+ {
+ if (!(crtc_updates[i].master) || !(crtc_info[crtc_updates[i].crtc].supported))
+ continue;
+ if (!xflag)
+ fill_filter(&(crtc_updates[i].filter));
+ 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;
+
+ 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;
+}
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