wlroots-hyprland/example/simple.c

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#define _POSIX_C_SOURCE 199309L
#include <stdio.h>
#include <stdlib.h>
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#include <time.h>
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#include <inttypes.h>
#include <wayland-server.h>
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#include <GLES3/gl3.h>
#include <wlr/backend.h>
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#include <wlr/session.h>
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#include <wlr/types.h>
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struct state {
float color[3];
int dec;
struct timespec last_frame;
struct wl_listener output_add;
struct wl_listener output_remove;
struct wl_list outputs;
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};
struct output_state {
struct wl_list link;
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struct wlr_output *output;
struct state *state;
struct wl_listener frame;
};
void output_frame(struct wl_listener *listener, void *data) {
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struct output_state *ostate = wl_container_of(listener, ostate, frame);
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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);
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fprintf(stderr, "%s %s %"PRId32"mm x %"PRId32"mm\n", output->make, output->model,
output->phys_width, output->phys_height);
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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);
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}
void output_remove(struct wl_listener *listener, void *data) {
struct wlr_output *output = data;
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struct state *state = wl_container_of(listener, state, output_remove);
struct output_state *ostate = NULL, *_ostate;
wl_list_for_each(_ostate, &state->outputs, link) {
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if (_ostate->output == output) {
ostate = _ostate;
break;
}
}
if (!ostate) {
return; // We are unfamiliar with this output
}
wl_list_remove(&ostate->link);
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wl_list_remove(&ostate->frame.link);
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}
int timer_done(void *data) {
*(bool *)data = true;
return 1;
}
int enable_outputs(void *data) {
struct state *state = data;
struct output_state *ostate;
wl_list_for_each(ostate, &state->outputs, link) {
struct wlr_output *output = ostate->output;
wlr_output_enable(output, true);
}
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return 1;
}
int disable_outputs(void *data) {
struct state *state = data;
struct output_state *ostate;
wl_list_for_each(ostate, &state->outputs, link) {
struct wlr_output *output = ostate->output;
wlr_output_enable(output, false);
}
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return 1;
}
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int main() {
struct state state = {
.color = { 1.0, 0.0, 0.0 },
.dec = 0,
.output_add = { .notify = output_add },
.output_remove = { .notify = output_remove }
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};
wl_list_init(&state.outputs);
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wl_list_init(&state.output_add.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);
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struct wlr_session *session = wlr_session_start(display);
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if (!session) {
return 1;
}
struct wlr_backend *wlr = wlr_backend_autocreate(display, session);
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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;
}
bool done = false;
struct wl_event_source *timer = wl_event_loop_add_timer(event_loop,
timer_done, &done);
struct wl_event_source *timer_disable_outputs =
wl_event_loop_add_timer(event_loop, disable_outputs, &state);
struct wl_event_source *timer_enable_outputs =
wl_event_loop_add_timer(event_loop, enable_outputs, &state);
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wl_event_source_timer_update(timer, 20000);
wl_event_source_timer_update(timer_disable_outputs, 5000);
wl_event_source_timer_update(timer_enable_outputs, 10000);
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while (!done) {
wl_event_loop_dispatch(event_loop, 0);
}
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wl_event_source_remove(timer);
wlr_backend_destroy(wlr);
wl_display_destroy(display);
}