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-rw-r--r--cg-darkroom.c299
1 files changed, 299 insertions, 0 deletions
diff --git a/cg-darkroom.c b/cg-darkroom.c
new file mode 100644
index 0000000..b9b79f1
--- /dev/null
+++ b/cg-darkroom.c
@@ -0,0 +1,299 @@
+/* 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)3 << 61;
+
+/**
+ * The default class for the program
+ */
+char default_class[] = PKGNAME "::cg-darkroom::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 value = 0.25;
+
+
+
+/**
+ * Print usage information and exit
+ */
+void usage(void)
+{
+ fprintf(stderr,
+ "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] "
+ "(-x | [-p priority] [-d] [brightness])\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)
+{
+ int q = xflag + dflag;
+ if ((q > 1) || (xflag && (prio != NULL || argc)))
+ usage();
+ if (argc == 1)
+ {
+ if (parse_double(&value, argv[0]) < 0)
+ usage();
+ }
+ else if (argc)
+ usage();
+ return 0;
+}
+
+
+/**
+ * Fill a filter
+ *
+ * @param filter The filter to fill
+ * @return Zero on success, -1 on error
+ */
+static int fill_filter(libcoopgamma_filter_t* restrict filter)
+{
+ union libcoopgamma_ramps dramps;
+ size_t size;
+
+ if ((0 <= value) && (value <= 1))
+ {
+ switch (filter->depth)
+ {
+#define X(CONST, MEMBER, MAX, TYPE)\
+ case CONST:\
+ libclut_negative(&(filter->ramps.MEMBER), MAX, TYPE, 1, 0, 0);\
+ libclut_rgb_brightness(&(filter->ramps.MEMBER), MAX, TYPE, 1, 0, 0);\
+ libclut_cie_brightness(&(filter->ramps.MEMBER), MAX, TYPE, value, value, value);\
+ break;
+LIST_DEPTHS
+#undef X
+ default:
+ abort();
+ }
+ return 0;
+ }
+ if (filter->depth == LIBCOOPGAMMA_DOUBLE)
+ {
+ libclut_negative(&(filter->ramps.d), (double)1, double, 1, 0, 0);
+ libclut_rgb_brightness(&(filter->ramps.d), (double)1, double, 1, 0, 0);
+ libclut_cie_brightness(&(filter->ramps.d), (double)1, double, value, value, value);
+ libclut_clip(&(filter->ramps.d), (double)1, double, 1, 0, 0);
+ return 0;
+ }
+ if (filter->depth == LIBCOOPGAMMA_FLOAT)
+ {
+ libclut_negative(&(filter->ramps.f), (float)1, float, 1, 0, 0);
+ libclut_rgb_brightness(&(filter->ramps.f), (float)1, float, 1, 0, 0);
+ libclut_cie_brightness(&(filter->ramps.f), (float)1, float, value, value, value);
+ libclut_clip(&(filter->ramps.f), (float)1, float, 1, 0, 0);
+ return 0;
+ }
+
+ size = dramps.d.red_size = filter->ramps.d.red_size;
+ size += dramps.d.green_size = filter->ramps.d.green_size;
+ size += dramps.d.blue_size = filter->ramps.d.blue_size;
+ dramps.d.red = calloc(size, sizeof(double));
+ if (dramps.d.red == NULL)
+ return -1;
+ dramps.d.green = dramps.d.red + dramps.d.red_size;
+ dramps.d.blue = dramps.d.green + dramps.d.green_size;
+
+ libclut_start_over(&(dramps.d), (double)1, double, 1, 0, 0);
+ libclut_negative(&(dramps.d), (double)1, double, 1, 0, 0);
+ libclut_rgb_brightness(&(dramps.d), (double)1, double, 1, 0, 0);
+ libclut_cie_brightness(&(dramps.d), (double)1, double, value, value, value);
+ libclut_clip(&(dramps.d), (double)1, double, 1, 0, 0);
+
+ switch (filter->depth)
+ {
+ case LIBCOOPGAMMA_UINT8:
+ libclut_translate(&(filter->ramps.u8), UINT8_MAX, uint8_t, &(dramps.d), (double)1, double);
+ break;
+ case LIBCOOPGAMMA_UINT16:
+ libclut_translate(&(filter->ramps.u16), UINT16_MAX, uint16_t, &(dramps.d), (double)1, double);
+ break;
+ case LIBCOOPGAMMA_UINT32:
+ libclut_translate(&(filter->ramps.u32), UINT32_MAX, uint32_t, &(dramps.d), (double)1, double);
+ break;
+ case LIBCOOPGAMMA_UINT64:
+ libclut_translate(&(filter->ramps.u64), UINT64_MAX, uint64_t, &(dramps.d), (double)1, double);
+ break;
+ default:
+ abort();
+ }
+
+ free(dramps.d.red);
+ 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;
+
+ 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)
+ if ((r = fill_filter(&(crtc_updates[i].filter))) < 0)
+ return r;
+ 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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