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#define _POSIX_C_SOURCE 199309L
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <inttypes.h>
#include <wayland-server.h>
#include <GLES3/gl3.h>
#include <wlr/backend.h>
#include <wlr/session.h>
#include <wlr/types.h>
#include <xkbcommon/xkbcommon.h>
struct state {
float color[3];
int dec;
bool exit;
struct timespec last_frame;
struct xkb_keymap *keymap;
struct xkb_state *xkb_state;
struct wl_list keyboards;
struct wl_listener input_add;
struct wl_listener input_remove;
struct wl_listener output_add;
struct wl_listener output_remove;
struct wl_list outputs;
};
struct output_state {
struct state *state;
struct wlr_output *output;
struct wl_listener frame;
struct wl_list link;
};
struct keyboard_state {
struct state *state;
struct wlr_input_device *device;
struct wl_listener key;
struct wl_list link;
};
void output_frame(struct wl_listener *listener, void *data) {
struct output_state *ostate = wl_container_of(listener, ostate, frame);
struct state *s = ostate->state;
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
long ms = (now.tv_sec - s->last_frame.tv_sec) * 1000 +
(now.tv_nsec - s->last_frame.tv_nsec) / 1000000;
int inc = (s->dec + 1) % 3;
s->color[inc] += ms / 2000.0f;
s->color[s->dec] -= ms / 2000.0f;
if (s->color[s->dec] < 0.0f) {
s->color[inc] = 1.0f;
s->color[s->dec] = 0.0f;
s->dec = inc;
}
s->last_frame = now;
glClearColor(s->color[0], s->color[1], s->color[2], 1.0);
glClear(GL_COLOR_BUFFER_BIT);
}
void output_add(struct wl_listener *listener, void *data) {
struct wlr_output *output = data;
struct state *state = wl_container_of(listener, state, output_add);
fprintf(stderr, "Output '%s' added\n", output->name);
fprintf(stderr, "%s %s %"PRId32"mm x %"PRId32"mm\n", output->make, output->model,
output->phys_width, output->phys_height);
wlr_output_set_mode(output, output->modes->items[0]);
struct output_state *ostate = calloc(1, sizeof(struct output_state));
ostate->output = output;
ostate->state = state;
ostate->frame.notify = output_frame;
wl_list_init(&ostate->frame.link);
wl_signal_add(&output->events.frame, &ostate->frame);
wl_list_insert(&state->outputs, &ostate->link);
}
void output_remove(struct wl_listener *listener, void *data) {
struct wlr_output *output = data;
struct state *state = wl_container_of(listener, state, output_remove);
struct output_state *ostate = NULL, *_ostate;
wl_list_for_each(_ostate, &state->outputs, link) {
if (_ostate->output == output) {
ostate = _ostate;
break;
}
}
if (!ostate) {
return; // We are unfamiliar with this output
}
wl_list_remove(&ostate->link);
wl_list_remove(&ostate->frame.link);
}
static void handle_keysym(struct state *state, xkb_keysym_t sym,
enum wlr_key_state key_state) {
char name[64];
int l = xkb_keysym_get_name(sym, name, sizeof(name));
if (l != -1 && l != sizeof(name)) {
fprintf(stderr, "Key event: %s %s\n", name,
key_state == WLR_KEY_PRESSED ? "pressed" : "released");
}
if (sym == XKB_KEY_Escape) {
state->exit = true;
}
}
static void keyboard_key(struct wl_listener *listener, void *data) {
struct wlr_keyboard_key *event = data;
struct keyboard_state *kbstate = wl_container_of(listener, kbstate, key);
uint32_t keycode = event->keycode + 8;
const xkb_keysym_t *syms;
int nsyms = xkb_state_key_get_syms(kbstate->state->xkb_state, keycode, &syms);
for (int i = 0; i < nsyms; ++i) {
handle_keysym(kbstate->state, syms[i], event->state);
}
xkb_state_update_key(kbstate->state->xkb_state, keycode,
event->state == WLR_KEY_PRESSED ? XKB_KEY_DOWN : XKB_KEY_UP);
}
void input_add(struct wl_listener *listener, void *data) {
struct wlr_input_device *device = data;
struct state *state = wl_container_of(listener, state, input_add);
if (device->type != WLR_INPUT_DEVICE_KEYBOARD) {
return;
}
struct keyboard_state *kbstate = calloc(sizeof(struct keyboard_state), 1);
kbstate->device = device;
kbstate->state = state;
wl_list_init(&kbstate->key.link);
kbstate->key.notify = keyboard_key;
wl_signal_add(&device->keyboard->events.key, &kbstate->key);
wl_list_insert(&state->keyboards, &kbstate->link);
}
void input_remove(struct wl_listener *listener, void *data) {
struct wlr_input_device *device = data;
struct state *state = wl_container_of(listener, state, input_add);
if (device->type != WLR_INPUT_DEVICE_KEYBOARD) {
return;
}
struct keyboard_state *kbstate = NULL, *_kbstate;
wl_list_for_each(_kbstate, &state->keyboards, link) {
if (_kbstate->device == device) {
kbstate = kbstate;
break;
}
}
if (!kbstate) {
return; // We are unfamiliar with this keyboard
}
wl_list_remove(&kbstate->link);
wl_list_remove(&kbstate->key.link);
}
static int timer_done(void *data) {
struct state *state = data;
state->exit = true;
return 1;
}
int main() {
struct state state = {
.color = { 1.0, 0.0, 0.0 },
.dec = 0,
.exit = false,
.input_add = { .notify = input_add },
.input_remove = { .notify = input_remove },
.output_add = { .notify = output_add },
.output_remove = { .notify = output_remove },
};
struct xkb_rule_names rules;
memset(&rules, 0, sizeof(rules));
rules.rules = getenv("XKB_DEFAULT_RULES");
rules.model = getenv("XKB_DEFAULT_MODEL");
rules.layout = getenv("XKB_DEFAULT_LAYOUT");
rules.variant = getenv("XKB_DEFAULT_VARIANT");
rules.options = getenv("XKB_DEFAULT_OPTIONS");
struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
if (!context) {
fprintf(stderr, "Failed to create XKB context\n");
return 1;
}
state.keymap =
xkb_map_new_from_names(context, &rules, XKB_KEYMAP_COMPILE_NO_FLAGS);
if (!state.keymap) {
fprintf(stderr, "Failed to create XKB keymap\n");
return 1;
}
xkb_context_unref(context);
state.xkb_state = xkb_state_new(state.keymap);
wl_list_init(&state.keyboards);
wl_list_init(&state.input_add.link);
wl_list_init(&state.input_remove.link);
wl_list_init(&state.outputs);
wl_list_init(&state.output_remove.link);
wl_list_init(&state.output_remove.link);
clock_gettime(CLOCK_MONOTONIC, &state.last_frame);
struct wl_display *display = wl_display_create();
struct wl_event_loop *event_loop = wl_display_get_event_loop(display);
struct wlr_session *session = wlr_session_start(display);
if (!session) {
return 1;
}
struct wlr_backend *wlr = wlr_backend_autocreate(display, session);
wl_signal_add(&wlr->events.input_add, &state.input_add);
wl_signal_add(&wlr->events.input_remove, &state.input_remove);
wl_signal_add(&wlr->events.output_add, &state.output_add);
wl_signal_add(&wlr->events.output_remove, &state.output_remove);
if (!wlr || !wlr_backend_init(wlr)) {
return 1;
}
struct wl_event_source *timer = wl_event_loop_add_timer(event_loop,
timer_done, &state);
wl_event_source_timer_update(timer, 30000);
while (!state.exit) {
wl_event_loop_dispatch(event_loop, 0);
}
wlr_backend_destroy(wlr);
wl_display_destroy(display);
}
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