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#define _POSIX_C_SOURCE 200809L
#include <errno.h>
#include <stdbool.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-output-power-management-unstable-v1-client-protocol.h"
struct output {
struct wl_output *wl_output;
struct zwlr_output_power_v1 *output_power;
struct wl_list link;
};
static struct wl_list outputs;
static struct zwlr_output_power_manager_v1 *output_power_manager = NULL;
static void output_power_handle_mode(void *data,
struct zwlr_output_power_v1 *output_power,
enum zwlr_output_power_v1_mode mode) {
struct output *output = data;
switch (mode) {
case ZWLR_OUTPUT_POWER_V1_MODE_OFF:
printf("Output %p disabled\n", output);
break;
case ZWLR_OUTPUT_POWER_V1_MODE_ON:
printf("Output %p enabled\n", output);
break;
}
}
static void output_power_handle_failed(void *data,
struct zwlr_output_power_v1 *output_power) {
fprintf(stderr, "failed to set output power mode\n");
exit(EXIT_FAILURE);
}
static const struct zwlr_output_power_v1_listener output_power_listener = {
.mode = output_power_handle_mode,
.failed = output_power_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(struct output));
output->wl_output = wl_registry_bind(registry, name,
&wl_output_interface, 1);
wl_list_insert(&outputs, &output->link);
} else if (strcmp(interface,
zwlr_output_power_manager_v1_interface.name) == 0) {
output_power_manager = wl_registry_bind(registry, name,
&zwlr_output_power_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 const char usage[] = "usage: output-power-management [options...]\n"
" -h: show this help message\n"
" -e: turn outputs on\n"
" -d: turn outputs off\n"
" -w: continuously watch for power mode changes\n";
int main(int argc, char *argv[]) {
wl_list_init(&outputs);
int opt;
enum zwlr_output_power_v1_mode mode =
ZWLR_OUTPUT_POWER_V1_MODE_ON;
bool watch_mode = false;
while ((opt = getopt(argc, argv, "edhw")) != -1) {
switch (opt) {
case 'e':
mode = ZWLR_OUTPUT_POWER_V1_MODE_ON;
break;
case 'd':
mode = ZWLR_OUTPUT_POWER_V1_MODE_OFF;
break;
case 'w':
watch_mode = true;
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 (output_power_manager == NULL) {
fprintf(stderr,
"compositor doesn't support wlr-output-power-management-unstable-v1\n");
return EXIT_FAILURE;
}
struct output *output;
wl_list_for_each(output, &outputs, link) {
output->output_power = zwlr_output_power_manager_v1_get_output_power(
output_power_manager, output->wl_output);
zwlr_output_power_v1_add_listener(output->output_power,
&output_power_listener, output);
}
wl_display_roundtrip(display);
wl_list_for_each(output, &outputs, link) {
zwlr_output_power_v1_set_mode(output->output_power,
mode);
}
if (!watch_mode) {
wl_display_roundtrip(display);
return EXIT_SUCCESS;
}
while (wl_display_dispatch(display) != -1) {
// nothing to see here, please move along
}
return EXIT_SUCCESS;
}
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