143 lines
3.7 KiB
C
143 lines
3.7 KiB
C
#define _POSIX_C_SOURCE 199309L
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <wayland-server.h>
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#include <GLES3/gl3.h>
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#include <wlr/backend/drm.h>
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#include <wlr/session.h>
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#include <wlr/common/list.h>
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struct state {
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float color[3];
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int dec;
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struct timespec last_frame;
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struct wl_listener output_add;
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struct wl_listener output_remove;
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list_t *outputs;
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};
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struct output_state {
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struct wlr_output *output;
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struct state *state;
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struct wl_listener frame;
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};
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void output_frame(struct wl_listener *listener, void *data) {
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struct wlr_output *output = data;
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struct output_state *ostate = wl_container_of(
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listener, ostate, frame);
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struct state *s = ostate->state;
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struct timespec now;
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clock_gettime(CLOCK_MONOTONIC, &now);
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long ms = (now.tv_sec - s->last_frame.tv_sec) * 1000 +
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(now.tv_nsec - s->last_frame.tv_nsec) / 1000000;
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int inc = (s->dec + 1) % 3;
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s->color[inc] += ms / 2000.0f;
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s->color[s->dec] -= ms / 2000.0f;
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if (s->color[s->dec] < 0.0f) {
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s->color[inc] = 1.0f;
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s->color[s->dec] = 0.0f;
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s->dec = inc;
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}
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s->last_frame = now;
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wlr_drm_output_begin(output);
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glClearColor(s->color[0], s->color[1], s->color[2], 1.0);
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glClear(GL_COLOR_BUFFER_BIT);
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wlr_drm_output_end(output);
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}
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void output_add(struct wl_listener *listener, void *data) {
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struct wlr_output *output = data;
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struct state *state = wl_container_of(listener, state, output_add);
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fprintf(stderr, "Output '%s' added\n", output->name);
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wlr_output_set_mode(output, output->modes->items[0]);
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struct output_state *ostate = calloc(1, sizeof(struct output_state));
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ostate->output = output;
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ostate->state = state;
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ostate->frame.notify = output_frame;
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wl_list_init(&ostate->frame.link);
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wl_signal_add(&output->events.frame, &ostate->frame);
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list_add(state->outputs, ostate);
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}
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void output_remove(struct wl_listener *listener, void *data) {
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struct wlr_output *output = data;
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fprintf(stderr, "Output '%s' removed\n", output->name);
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// TODO: remove signal from state->output_frame
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}
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int timer_done(void *data) {
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*(bool *)data = true;
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return 1;
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}
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int timer_change_vt(void *data) {
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struct wlr_session *session = data;
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wlr_session_change_vt(session, 7);
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return 1;
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}
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int main() {
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if (getenv("DISPLAY")) {
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fprintf(stderr, "Detected that X is running. Run this in its own virtual terminal.\n");
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return 1;
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} else if (getenv("WAYLAND_DISPLAY")) {
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fprintf(stderr, "Detected that Wayland is running. Run this in its own virtual terminal.\n");
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return 1;
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}
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struct state state = {
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.color = { 1.0, 0.0, 0.0 },
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.dec = 0,
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.output_add = { .notify = output_add },
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.output_remove = { .notify = output_remove },
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.outputs = list_create(),
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};
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wl_list_init(&state.output_add.link);
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wl_list_init(&state.output_remove.link);
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clock_gettime(CLOCK_MONOTONIC, &state.last_frame);
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struct wl_display *display = wl_display_create();
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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) {
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return 1;
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}
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struct wlr_backend *wlr = wlr_drm_backend_create(display, session);
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wl_signal_add(&wlr->events.output_add, &state.output_add);
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wl_signal_add(&wlr->events.output_remove, &state.output_remove);
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if (!wlr || !wlr_backend_init(wlr)) {
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return 1;
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}
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bool done = false;
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struct wl_event_source *timer = wl_event_loop_add_timer(event_loop,
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timer_done, &done);
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struct wl_event_source *timer_vt = wl_event_loop_add_timer(event_loop,
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timer_change_vt, session);
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wl_event_source_timer_update(timer, 15000);
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wl_event_source_timer_update(timer_vt, 5000);
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while (!done) {
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wl_event_loop_dispatch(event_loop, 0);
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}
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wl_event_source_remove(timer);
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wlr_backend_destroy(wlr);
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wl_display_destroy(display);
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}
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