diff options
Diffstat (limited to 'examples/gamma-control.c')
| -rw-r--r-- | examples/gamma-control.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/examples/gamma-control.c b/examples/gamma-control.c deleted file mode 100644 index 69d1cd75..00000000 --- a/examples/gamma-control.c +++ /dev/null @@ -1,194 +0,0 @@ -#define _POSIX_C_SOURCE 200809L -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/mman.h> -#include <sys/types.h> -#include <unistd.h> -#include <wayland-client-protocol.h> -#include <wayland-client.h> -#include "wlr-gamma-control-unstable-v1-client-protocol.h" - -struct output { - struct wl_output *wl_output; - struct zwlr_gamma_control_v1 *gamma_control; - uint32_t ramp_size; - int table_fd; - uint16_t *table; - struct wl_list link; -}; - -static struct wl_list outputs; -static struct zwlr_gamma_control_manager_v1 *gamma_control_manager = NULL; - -static int create_anonymous_file(off_t size) { - char template[] = "/tmp/wlroots-shared-XXXXXX"; - int fd = mkstemp(template); - if (fd < 0) { - return -1; - } - - int ret; - do { - errno = 0; - ret = ftruncate(fd, size); - } while (errno == EINTR); - if (ret < 0) { - close(fd); - return -1; - } - - unlink(template); - return fd; -} - -static int create_gamma_table(uint32_t ramp_size, uint16_t **table) { - size_t table_size = ramp_size * 3 * sizeof(uint16_t); - int fd = create_anonymous_file(table_size); - if (fd < 0) { - fprintf(stderr, "failed to create anonymous file\n"); - return -1; - } - - void *data = - mmap(NULL, table_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); - if (data == MAP_FAILED) { - fprintf(stderr, "failed to mmap()\n"); - close(fd); - return -1; - } - - *table = data; - return fd; -} - -static void gamma_control_handle_gamma_size(void *data, - struct zwlr_gamma_control_v1 *gamma_control, uint32_t ramp_size) { - struct output *output = data; - output->ramp_size = ramp_size; - output->table_fd = create_gamma_table(ramp_size, &output->table); - if (output->table_fd < 0) { - exit(EXIT_FAILURE); - } -} - -static void gamma_control_handle_failed(void *data, - struct zwlr_gamma_control_v1 *gamma_control) { - fprintf(stderr, "failed to set gamma table\n"); - exit(EXIT_FAILURE); -} - -static const struct zwlr_gamma_control_v1_listener gamma_control_listener = { - .gamma_size = gamma_control_handle_gamma_size, - .failed = gamma_control_handle_failed, -}; - -static void registry_handle_global(void *data, struct wl_registry *registry, - uint32_t name, const char *interface, uint32_t version) { - if (strcmp(interface, wl_output_interface.name) == 0) { - struct output *output = calloc(1, sizeof(*output)); - output->wl_output = wl_registry_bind(registry, name, - &wl_output_interface, 1); - wl_list_insert(&outputs, &output->link); - } else if (strcmp(interface, - zwlr_gamma_control_manager_v1_interface.name) == 0) { - gamma_control_manager = wl_registry_bind(registry, name, - &zwlr_gamma_control_manager_v1_interface, 1); - } -} - -static void registry_handle_global_remove(void *data, - struct wl_registry *registry, uint32_t name) { - // Who cares? -} - -static const struct wl_registry_listener registry_listener = { - .global = registry_handle_global, - .global_remove = registry_handle_global_remove, -}; - -static void fill_gamma_table(uint16_t *table, uint32_t ramp_size, - double contrast, double brightness, double gamma) { - uint16_t *r = table; - uint16_t *g = table + ramp_size; - uint16_t *b = table + 2 * ramp_size; - for (uint32_t i = 0; i < ramp_size; ++i) { - double val = (double)i / (ramp_size - 1); - val = contrast * pow(val, 1.0 / gamma) + (brightness - 1); - if (val > 1.0) { - val = 1.0; - } else if (val < 0.0) { - val = 0.0; - } - r[i] = g[i] = b[i] = (uint16_t)(UINT16_MAX * val); - } -} - -static const char usage[] = "usage: gamma-control [options]\n" - " -h show this help message\n" - " -c <value> set contrast (default: 1)\n" - " -b <value> set brightness (default: 1)\n" - " -g <value> set gamma (default: 1)\n"; - -int main(int argc, char *argv[]) { - wl_list_init(&outputs); - - double contrast = 1, brightness = 1, gamma = 1; - int opt; - while ((opt = getopt(argc, argv, "hc:b:g:")) != -1) { - switch (opt) { - case 'c': - contrast = strtod(optarg, NULL); - break; - case 'b': - brightness = strtod(optarg, NULL); - break; - case 'g': - gamma = strtod(optarg, NULL); - break; - case 'h': - default: - fprintf(stderr, usage); - return opt == 'h' ? EXIT_SUCCESS : EXIT_FAILURE; - } - } - - struct wl_display *display = wl_display_connect(NULL); - if (display == NULL) { - fprintf(stderr, "failed to create display\n"); - return -1; - } - - struct wl_registry *registry = wl_display_get_registry(display); - wl_registry_add_listener(registry, ®istry_listener, NULL); - wl_display_roundtrip(display); - - if (gamma_control_manager == NULL) { - fprintf(stderr, - "compositor doesn't support wlr-gamma-control-unstable-v1\n"); - return EXIT_FAILURE; - } - - struct output *output; - wl_list_for_each(output, &outputs, link) { - output->gamma_control = zwlr_gamma_control_manager_v1_get_gamma_control( - gamma_control_manager, output->wl_output); - zwlr_gamma_control_v1_add_listener(output->gamma_control, - &gamma_control_listener, output); - } - wl_display_roundtrip(display); - - wl_list_for_each(output, &outputs, link) { - fill_gamma_table(output->table, output->ramp_size, - contrast, brightness, gamma); - zwlr_gamma_control_v1_set_gamma(output->gamma_control, - output->table_fd); - } - - while (wl_display_dispatch(display) != -1) { - // This space is intentionnally left blank - } - - return EXIT_SUCCESS; -} |