diff options
| -rw-r--r-- | src/state.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/src/state.c b/src/state.c index cf2a2dd..a3219fa 100644 --- a/src/state.c +++ b/src/state.c @@ -20,10 +20,32 @@ #include <string.h> #include <stdlib.h> #include <errno.h> +#include <limits.h> #include <libgamma.h> + #define try(...) do { if (!(__VA_ARGS__)) goto fail; } while (0) +#define t(...) do { if (__VA_ARGS__) goto fail; } while (0) + + + +/** + * The name of the process. + */ +extern char *argv0; + + + +/** + * All sites. + */ +static libgamma_site_state_t *sites = NULL; + +/** + * The number of sites stored in `sites`. + */ +static size_t sites_n = 0; @@ -179,3 +201,98 @@ fail: return saved_errno = errno, free(env), free(display), errno = saved_errno, rc; } + +/** + * Parse a value for the -d option, or select preferred adjustment method. + * + * @param display The argument for the -d option. `NULL` for the preferred adjustment method. + * @return The adjustment method. -1 if not found. + */ +static int +get_clut_method(const char *display) +{ + int method; + const char *env; + + if (!display) { + if (!libgamma_list_methods(&method, 1, 0)) { + fprintf(stderr, "No display was found.\n" + "DRM support missing.\n" + "Can you even see?\n"); + return errno = 0, -1; + } + return method; + } + if (!strcasecmp(display, "none")) return INT_MAX; + if (!strcasecmp(display, "drm")) return LIBGAMMA_METHOD_LINUX_DRM; + if (!strchr(display, '=')) { + fprintf(stderr, "Specified display\n" + "cannot be recognised.\n" + "Try something else.\n"); + return errno = 0, -1; + } + + for (method = 0; method < LIBGAMMA_METHOD_COUNT; method++) { + env = libgamma_method_default_site_variable(method); + if (env && (strstr(display, env) == display) && (display[strlen(env)] == '=')) + return method; + } + + fprintf(stderr, "Specified display\n" + "cannot be recognised.\n" + "Try to recompile.\n"); + return errno = 0, -1; +} + + +/** + * Initialise the CLUT support. + * + * @param settings The settings. + * @return 0 on success, -1 on error. + */ +int +initialise_clut(const struct settings *settings) +{ + int method, error = 0, is_none = 0; + const char *sitename_; + char *sitename = NULL; + void *new; + size_t i; + int saved_errno; + + try (sites = calloc(settings->monitors_n + 2, sizeof(*sites))); + + for (i = 0; i < settings->monitors_n; i++) { + switch (settings->monitors_arg[i]) { + case 'd': + t ((method = get_clut_method(sitename_ = settings->monitors_id[i])) < 0); + if ((is_none = (method == INT_MAX))) + break; + sitename_ = strchr(sitename_, '='); + if (sitename_) try ((sitename = strdup(sitename_ + 1))); + t ((error = libgamma_site_initialise(sites + sites_n, method, sitename))); + sitename = NULL; + sites_n++; + break; + + case 'm': + ;/* TODO -m */ + break; + + case 'e': + ;/* TODO -e */ + break; + } + } + + new = realloc(sites, (sites_n + 1) * sizeof(*sites)); + sites = new ? new : sites; + + return 0; +fail: + if (error) libgamma_perror(argv0, error), errno = 0; + saved_errno = errno, free(sitename), errno = saved_errno; + return -1; +} + |