1 files changed, 128 insertions, 14 deletions

diff --git a/example/main.c b/example/main.c
index 4240b9e3..2c168d98 100644
--- a/example/main.c
+++ b/example/main.c
@@ -1,19 +1,133 @@
-#define _POSIX_C_SOURCE 200112L
+#define _POSIX_C_SOURCE 199309L
+#include <stdio.h>
 #include <stdlib.h>
-#include <wlr/backend.h>
-#include <wlr/backend/wayland.h>
+#include <time.h>
 #include <wayland-server.h>
+#include <GLES3/gl3.h>
+#include <wlr/backend/drm.h>
+#include <wlr/session.h>
+#include <wlr/common/list.h>
 
-int main(int argc, char **argv) {
-	// TODO: Move this stuff to a wlr backend selector function
-	char *_wl_display = getenv("WAYLAND_DISPLAY");
-	if (_wl_display) {
-		unsetenv("WAYLAND_DISPLAY");
-		setenv("_WAYLAND_DISPLAY", _wl_display, 1);
+struct state {
+	float color[3];
+	int dec;
+	struct timespec last_frame;
+	struct wl_listener output_add;
+	struct wl_listener output_remove;
+	list_t *outputs;
+};
+
+struct output_state {
+	struct wlr_output *output;
+	struct state *state;
+	struct wl_listener frame;
+};
+
+void output_frame(struct wl_listener *listener, void *data) {
+	struct wlr_output *output = 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;
+
+	wlr_drm_output_begin(output);
+
+	glClearColor(s->color[0], s->color[1], s->color[2], 1.0);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	wlr_drm_output_end(output);
+}
+
+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);
+	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);
+	list_add(state->outputs, ostate);
+}
+
+void output_remove(struct wl_listener *listener, void *data) {
+	struct wlr_output *output = data;
+	fprintf(stderr, "Output '%s' removed\n", output->name);
+	// TODO: remove signal from state->output_frame
+}
+
+int timer_done(void *data) {
+	*(bool *)data = true;
+	return 1;
+}
+
+int main() {
+	if (getenv("DISPLAY")) {
+		fprintf(stderr, "Detected that X is running. Run this in its own virtual terminal.\n");
+		return 1;
+	} else if (getenv("WAYLAND_DISPLAY")) {
+		fprintf(stderr, "Detected that Wayland is running. Run this in its own virtual terminal.\n");
+		return 1;
+	}
+
+	struct state state = {
+		.color = { 1.0, 0.0, 0.0 },
+		.dec = 0,
+		.output_add = { .notify = output_add },
+		.output_remove = { .notify = output_remove },
+		.outputs = list_create(),
+	};
+
+	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);
+
+	struct wlr_session *session = wlr_session_start();
+	if (!session) {
+		return 1;
+	}
+
+	struct wlr_backend *wlr = wlr_drm_backend_create(display, session);
+	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);
+
+	wl_event_source_timer_update(timer, 5000);
+
+	while (!done) {
+		wl_event_loop_dispatch(event_loop, 0);
 	}
-	struct wl_display *wl_display = wl_display_create();
-	struct wlr_wl_backend *backend = wlr_wl_backend_init(wl_display, 1);
-	wlr_wl_backend_free(backend);
-	wl_display_destroy(wl_display);
-	return 0;
+
+	wl_event_source_remove(timer);
+	wlr_backend_destroy(wlr);
+	wl_display_destroy(display);
 }