From b9ad6ec904bf1f03a2142409d23421a09a1573aa Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Sat, 6 Aug 2016 01:19:34 +0200 Subject: Add cg-gamma MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- src/cg-gamma.c | 549 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 549 insertions(+) create mode 100644 src/cg-gamma.c (limited to 'src') diff --git a/src/cg-gamma.c b/src/cg-gamma.c new file mode 100644 index 0000000..8d2ab0b --- /dev/null +++ b/src/cg-gamma.c @@ -0,0 +1,549 @@ +/** + * 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 . + */ +#define _DEFAULT_SOURCE +#define _BSD_SOURCE + +#include "cg-base.h" + +#include + +#include +#include +#include +#include +#include +#include +#include +#include + + + +/** + * The default filter priority for the program + */ +const int64_t default_priority = 0; + +/** + * The default class for the program + */ +char* const default_class = PKGNAME "::cg-gamma::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; + +/** + * -f: gamma listing file + */ +static char* fflag = NULL; + +/** + * The gamma of the red channel + */ +static double rgamma = 1; + +/** + * The gamma of the green channel + */ +static double ggamma = 1; + +/** + * The gamma of the blue channel + */ +static double bgamma = 1; + +/** + * `NULL`-terminated list of output + * names list in the configuration file + */ +static char** names = NULL; + +/** + * The gamma of the red channel on monitor + * with same index in `names` + */ +static double* rgammas = NULL; + +/** + * The gamma of the green channel on monitor + * with same index in `names` + */ +static double* ggammas = NULL; + +/** + * The gamma of the blue channel on monitor + * with same index in `names` + */ +static double* bgammas = NULL; + + + +/** + * Print usage information and exit + */ +void usage(void) +{ + fprintf(stderr, + "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] " + "(-d | [-p priority] [-x] [-f file | all | red green blue])\n", + argv0); + exit(1); +} + + +/** + * Perform cleanup so valgrind output is clean + * + * @param ret The value to return + * @return `ret` is returned as is + */ +static int cleanup(int ret) +{ + int saved_errno = errno; + if (names != NULL) + { + char** p = names; + while (*p) + free(*p++); + } + free(names); + free(rgammas); + free(ggammas); + free(bgammas); + errno = saved_errno; + return ret; +} + + +/** + * 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; + case 'f': + if (fflag || !(fflag = arg)) + usage(); + return 1; + default: + usage(); + } + return 0; +} + + +/** + * Get the pathname of a configuration file + * + * @param confname The filename (excluding directory) of the configuration file + * @return The full pathname of the configuration file, `NULL` on error + */ +static char* get_conf_file(const char* restrict confname) +{ + struct passwd* pw; + char* path; + + pw = getpwuid(getuid()); + if ((pw == NULL) || (pw->pw_dir == NULL)) + return NULL; + + path = malloc(strlen(pw->pw_dir) + strlen(confname) + sizeof("/.config/")); + if (path == NULL) + return NULL; + + sprintf(path, "%s/.config/%s", pw->pw_dir, confname); + + if (access(path, F_OK) < 0) + sprintf(path, "/etc/%s", confname); + + return path; +} + + +/** + * 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; +} + + +/** + * Parse gamma configuration file + * + * @param pathname The pathname of the file + * @return Zero on success, -1 on error + */ +static int parse_gamma_file(const char* restrict pathname) +{ + int fd, saved_errno; + char* line = NULL; + size_t size = 0, lineno = 0, ptr = 0, alloc = 0; + ssize_t n; + FILE* f = NULL; + char* p; + char* q; + char* r; + char* g; + char* b; + + fd = open(pathname, O_RDONLY); + if (fd == -1) + return -1; + + f = fdopen(fd, "rb"); + if (f == NULL) + goto fail; + + while (n = getline(&line, &size, f), n >= 0) + { + lineno += 1; + + if ((n > 0) && (line[n - 1] == '\n')) + line[n - 1] = '\0'; + p = line; + while ((*p == ' ') || (*p == '\t')) p++; + if ((!*p) || (*p == '#')) + continue; + + r = strpbrk(line, " \t"); + if (r == NULL) + goto bad; + while (r[1] == ' ' || r[1] == '\t') r++; + g = strpbrk(r + 1, " \t"); + if (g == NULL) + goto bad; + while (g[1] == ' ' || g[1] == '\t') g++; + b = strpbrk(g + 1, " \t"); + if (b == NULL) + goto bad; + while (b[1] == ' ' || b[1] == '\t') b++; + + for (;;) + { + q = strpbrk(b + 1, " \t"); + if (q == NULL) + break; + while (q[1] == ' ' || q[1] == '\t') q++; + if (!*q) + break; + r = g, g = b, b = q; + } + + *r++ = '\0'; + *g++ = '\0'; + *b++ = '\0'; + + q = strpbrk(r, " \t"); + if (q != NULL) + *q = '\0'; + q = strpbrk(g, " \t"); + if (q != NULL) + *q = '\0'; + q = strpbrk(b, " \t"); + if (q != NULL) + *q = '\0'; + + q = strchr(p, '\0'); + while ((q != p) && ((q[-1] == ' ') || (q[-1] == '\t'))) + q--; + *q = '\0'; + + if (ptr == alloc) + { + void* new; + size_t new_size = alloc ? (alloc << 1) : 4; + + new = realloc(rgammas, new_size * sizeof(*rgammas)); + if (new == NULL) + goto fail; + rgammas = new; + + new = realloc(ggammas, new_size * sizeof(*ggammas)); + if (new == NULL) + goto fail; + ggammas = new; + + new = realloc(bgammas, new_size * sizeof(*bgammas)); + if (new == NULL) + goto fail; + bgammas = new; + + new = realloc(names, (new_size + 1) * sizeof(*names)); + if (new == NULL) + goto fail; + names = new; + memset(names + alloc, 0, (new_size + 1 - alloc) * sizeof(*names)); + + alloc = new_size; + } + + if ((parse_double(rgammas + ptr, r) < 0) || + (parse_double(ggammas + ptr, g) < 0) || + (parse_double(bgammas + ptr, b) < 0)) + goto bad; + names[ptr] = malloc(strlen(p) + 1); + if (names[ptr] == NULL) + goto fail; + strcpy(names[ptr], p); + ptr++; + + continue; + bad: + fprintf(stderr, "%s: ignoring malformatted line in %s: %zu\n", argv0, pathname, lineno); + } + + if (fclose(f) < 0) + { + f = NULL; + goto fail; + } + close(fd); + free(line); + return 0; + fail: + saved_errno = errno; + free(line); + if (f != NULL) + fclose(f); + if (fd >= 0) + close(fd); + errno = saved_errno; + return -1; +} + + +/** + * 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 free_fflag = 0, saved_errno; + int q = xflag + dflag + (fflag && argc); + 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) || (xflag && ((fflag != NULL) || (argc > 0) || (prio != NULL)))) + usage(); + if (argc == 1) + { + if (parse_double(&rgamma, argv[0]) < 0) + usage(); + bgamma = ggamma = rgamma; + } + else if (argc == 3) + { + if (parse_double(&rgamma, argv[0]) < 0) + usage(); + if (parse_double(&ggamma, argv[1]) < 0) + usage(); + if (parse_double(&bgamma, argv[2]) < 0) + usage(); + } + else if (argc) + usage(); + if (!argc && !fflag && !xflag) + { + fflag = get_conf_file("gamma"); + if (fflag == NULL) + return -1; + free_fflag = 1; + } + if (fflag) + if (parse_gamma_file(fflag) < 0) + goto fail; + if (free_fflag) + free(fflag), fflag = NULL; + return 0; + fail: + saved_errno = errno; + if (free_fflag) + free(fflag), fflag = NULL; + errno = saved_errno; + return cleanup(-1); +} + + +/** + * Fill a filter + * + * @param filter The filter to fill + * @param r The red gamma + * @param g The green gamma + * @param b The blue gamma + */ +static void fill_filter(libcoopgamma_filter_t* restrict filter, double r, double g, double b) +{ + switch (filter->depth) + { +#define X(CONST, MEMBER, MAX, TYPE)\ + case CONST:\ + libclut_gamma(&(filter->ramps.MEMBER), MAX, TYPE, r, g, b);\ + 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 && (names != NULL)) + if ((r = make_slaves()) < 0) + return cleanup(r); + + if (names == NULL) + 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), rgamma, ggamma, bgamma); + r = update_filter(i, 0); + if ((r == -2) || ((r == -1) && (errno != EAGAIN))) + return cleanup(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 cleanup(r); + } + } + else + for (i = 0, r = 1; i < crtcs_n; i++) + { + if (!(crtc_info[i].supported)) + continue; + for (j = 0; names[j] != NULL; j++) + if (!strcasecmp(crtc_updates[i].filter.crtc, names[j])) + { + fill_filter(&(crtc_updates[i].filter), rgammas[j], ggammas[j], bgammas[j]); + r = update_filter(i, 0); + if ((r == -2) || ((r == -1) && (errno != EAGAIN))) + return cleanup(r); + break; + } + } + + while (r != 1) + if ((r = synchronise(-1)) < 0) + return cleanup(r); + + if (!dflag) + return cleanup(0); + + if (libcoopgamma_set_nonblocking(&cg, 0) < 0) + return cleanup(-1); + for (;;) + if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0) + switch (errno) + { + case 0: + break; + case ENOTRECOVERABLE: + goto enotrecoverable; + default: + return cleanup(-1); + } + + enotrecoverable: + for (;;) + if (pause() < 0) + return cleanup(-1); +} + -- cgit v1.2.3-70-g09d2