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Diffstat (limited to 'src/cg-negative.c')
| -rw-r--r-- | src/cg-negative.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/src/cg-negative.c b/src/cg-negative.c new file mode 100644 index 0000000..566b81a --- /dev/null +++ b/src/cg-negative.c @@ -0,0 +1,255 @@ +/** + * 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 = ((int64_t)1) << 62; + +/** + * The default class for the program + */ +char* const default_class = PKGNAME "::cg-negative::standard"; + + + +/** + * -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; + +/** + * +r: do not touch the green channel + */ +static int gplus = 0; + +/** + * +r: do not touch the blue channel + */ +static int bplus = 0; + + + +/** + * Print usage information and exit + */ +void usage(void) +{ + fprintf(stderr, + "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] (-d | [-p priority] [-x] [+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; +} + + +/** + * 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 = dflag + (xflag | rplus | gplus | bplus); + q += (method != NULL) && !strcmp(method, "?"); + q += (prio != NULL) && !strcmp(prio, "?"); + q += (rule != NULL) && (!strcmp(method, "?") || !strcmp(method, "??")); + for (; *crtcs; crtcs++) + q += !strcmp(*crtcs, "?"); + if (argc || q || (dflag && (prio != NULL))) + usage(); +} + + +/** + * Fill a filter + * + * @param The filter to fill + */ +static void fill_filter(libcoopgamma_filter_t* restrict filter) +{ + switch (filter->depth) + { +#define X(CONST, MEMBER, MAX, TYPE)\ + case CONST:\ + libclut_negative(&(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 < crtcs_n; i++) + crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE; + else if (dflag) + for (i = 0; i < crtcs_n; i++) + crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH; + else + for (i = 0; i < crtcs_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 < crtcs_n; i++) + { + if (!(crtc_updates[i].master) || !(crtc_info[i].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 = update_filter(i, -1)) < 0) + return r; + + if (!dflag) + return 0; + + 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; +} + |