Inital commit of libotd.

backend/drm/otd.c

@@ -0,0 +1,71 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "otd.h"
+#include "drm.h"
+#include "event.h"
+#include "session.h"
+#include "udev.h"
+
+struct otd *otd_start(void)
+{
+	struct otd *otd = calloc(1, sizeof *otd);
+	if (!otd)
+		return NULL;
+
+	if (!otd_new_session(otd)) {
+		fprintf(stderr, "Could not create session\n");
+		goto error;
+	}
+
+	if (!otd_udev_start(otd)) {
+		fprintf(stderr, "Could not start udev\n");
+		goto error_session;
+	}
+
+	otd_udev_find_gpu(otd);
+	if (otd->fd == -1) {
+		fprintf(stderr, "Could not open GPU\n");
+		goto error_udev;
+	}
+
+	if (!init_renderer(otd)) {
+		fprintf(stderr, "Could not initalise renderer\n");
+		goto error_fd;
+	}
+
+	scan_connectors(otd);
+
+	return otd;
+
+error_fd:
+	release_device(otd, otd->fd);
+error_udev:
+	otd_udev_finish(otd);
+error_session:
+	otd_close_session(otd);
+error:
+	free(otd);
+	return NULL;
+}
+
+void otd_finish(struct otd *otd)
+{
+	if (!otd)
+		return;
+
+	for (size_t i = 0; i < otd->display_len; ++i) {
+		destroy_display_renderer(otd, &otd->displays[i]);
+	}
+
+	destroy_renderer(otd);
+	otd_close_session(otd);
+	otd_udev_finish(otd);
+
+	close(otd->fd);
+	free(otd->events);
+	free(otd->displays);
+	free(otd);
+}
+