diff --git a/display.c b/display.c
index 756e081..f0cf52d 100644
--- a/display.c
+++ b/display.c
@@ -9,134 +9,6 @@
 #include "log.h"
 #include "private.h"
 
-static int guess_plane_zpos_from_type(struct liftoff_display *display,
-				      uint32_t plane_id, uint32_t type)
-{
-	struct liftoff_plane *primary;
-
-	/* From far to close to the eye: primary, overlay, cursor. Unless
-	 * the overlay ID < primary ID. */
-	switch (type) {
-	case DRM_PLANE_TYPE_PRIMARY:
-		return 0;
-	case DRM_PLANE_TYPE_CURSOR:
-		return 2;
-	case DRM_PLANE_TYPE_OVERLAY:
-		if (liftoff_list_empty(&display->planes)) {
-			return 0; /* No primary plane, shouldn't happen */
-		}
-		primary = liftoff_container_of(display->planes.next,
-					       primary, link);
-		if (plane_id < primary->id) {
-			return -1;
-		} else {
-			return 1;
-		}
-	}
-	return 0;
-}
-
-static struct liftoff_plane *plane_create(struct liftoff_display *display,
-					  uint32_t id)
-{
-	struct liftoff_plane *plane, *cur;
-	drmModePlane *drm_plane;
-	drmModeObjectProperties *drm_props;
-	uint32_t i;
-	drmModePropertyRes *drm_prop;
-	struct liftoff_plane_property *prop;
-	uint64_t value;
-	bool has_type = false, has_zpos = false;
-
-	plane = calloc(1, sizeof(*plane));
-	if (plane == NULL) {
-		return NULL;
-	}
-
-	drm_plane = drmModeGetPlane(display->drm_fd, id);
-	if (drm_plane == NULL) {
-		return NULL;
-	}
-	plane->id = drm_plane->plane_id;
-	plane->possible_crtcs = drm_plane->possible_crtcs;
-	drmModeFreePlane(drm_plane);
-
-	drm_props = drmModeObjectGetProperties(display->drm_fd, id,
-					       DRM_MODE_OBJECT_PLANE);
-	if (drm_props == NULL) {
-		return NULL;
-	}
-	plane->props = calloc(drm_props->count_props,
-			      sizeof(struct liftoff_plane_property));
-	if (plane->props == NULL) {
-		drmModeFreeObjectProperties(drm_props);
-		return NULL;
-	}
-	for (i = 0; i < drm_props->count_props; i++) {
-		drm_prop = drmModeGetProperty(display->drm_fd,
-					      drm_props->props[i]);
-		if (drm_prop == NULL) {
-			drmModeFreeObjectProperties(drm_props);
-			return NULL;
-		}
-		prop = &plane->props[i];
-		memcpy(prop->name, drm_prop->name, sizeof(prop->name));
-		prop->id = drm_prop->prop_id;
-		drmModeFreeProperty(drm_prop);
-		plane->props_len++;
-
-		value = drm_props->prop_values[i];
-		if (strcmp(prop->name, "type") == 0) {
-			plane->type = value;
-			has_type = true;
-		} else if (strcmp(prop->name, "zpos") == 0) {
-			plane->zpos = value;
-			has_zpos = true;
-		}
-	}
-	drmModeFreeObjectProperties(drm_props);
-
-	if (!has_type) {
-		liftoff_log(LIFTOFF_ERROR,
-			    "plane %"PRIu32" is missing the 'type' property",
-			    plane->id);
-		free(plane);
-		return NULL;
-	} else if (!has_zpos) {
-		plane->zpos = guess_plane_zpos_from_type(display, plane->id,
-							 plane->type);
-	}
-
-	/* During plane allocation, we will use the plane list order to fill
-	 * planes with FBs. Primary planes need to be filled first, then planes
-	 * far from the primary planes, then planes closer and closer to the
-	 * primary plane. */
-	if (plane->type == DRM_PLANE_TYPE_PRIMARY) {
-		liftoff_list_insert(&display->planes, &plane->link);
-	} else {
-		liftoff_list_for_each(cur, &display->planes, link) {
-			if (cur->type != DRM_PLANE_TYPE_PRIMARY &&
-			    plane->zpos >= cur->zpos) {
-				liftoff_list_insert(cur->link.prev, &plane->link);
-				break;
-			}
-		}
-
-		if (plane->link.next == NULL) { /* not inserted */
-			liftoff_list_insert(display->planes.prev, &plane->link);
-		}
-	}
-
-	return plane;
-}
-
-static void plane_destroy(struct liftoff_plane *plane)
-{
-	liftoff_list_remove(&plane->link);
-	free(plane->props);
-	free(plane);
-}
-
 struct liftoff_display *liftoff_display_create(int drm_fd)
 {
 	struct liftoff_display *display;
diff --git a/include/private.h b/include/private.h
index 287dec2..5b293db 100644
--- a/include/private.h
+++ b/include/private.h
@@ -70,4 +70,7 @@ struct liftoff_layer_property *layer_get_property(struct liftoff_layer *layer,
 void layer_get_rect(struct liftoff_layer *layer, struct liftoff_rect *rect);
 bool layer_intersects(struct liftoff_layer *a, struct liftoff_layer *b);
 
+struct liftoff_plane *plane_create(struct liftoff_display *display, uint32_t id);
+void plane_destroy(struct liftoff_plane *plane);
+
 #endif
diff --git a/meson.build b/meson.build
index 0a42bf7..d6f5fe7 100644
--- a/meson.build
+++ b/meson.build
@@ -32,6 +32,7 @@ liftoff_lib = library(
 		'list.c',
 		'log.c',
 		'output.c',
+		'plane.c',
 	),
 	include_directories: liftoff_inc,
 	version: meson.project_version(),
diff --git a/plane.c b/plane.c
new file mode 100644
index 0000000..a445dc5
--- /dev/null
+++ b/plane.c
@@ -0,0 +1,131 @@
+#include <inttypes.h>
+#include <stdlib.h>
+#include <string.h>
+#include "private.h"
+
+static int guess_plane_zpos_from_type(struct liftoff_display *display,
+				      uint32_t plane_id, uint32_t type)
+{
+	struct liftoff_plane *primary;
+
+	/* From far to close to the eye: primary, overlay, cursor. Unless
+	 * the overlay ID < primary ID. */
+	switch (type) {
+	case DRM_PLANE_TYPE_PRIMARY:
+		return 0;
+	case DRM_PLANE_TYPE_CURSOR:
+		return 2;
+	case DRM_PLANE_TYPE_OVERLAY:
+		if (liftoff_list_empty(&display->planes)) {
+			return 0; /* No primary plane, shouldn't happen */
+		}
+		primary = liftoff_container_of(display->planes.next,
+					       primary, link);
+		if (plane_id < primary->id) {
+			return -1;
+		} else {
+			return 1;
+		}
+	}
+	return 0;
+}
+
+struct liftoff_plane *plane_create(struct liftoff_display *display, uint32_t id)
+{
+	struct liftoff_plane *plane, *cur;
+	drmModePlane *drm_plane;
+	drmModeObjectProperties *drm_props;
+	uint32_t i;
+	drmModePropertyRes *drm_prop;
+	struct liftoff_plane_property *prop;
+	uint64_t value;
+	bool has_type = false, has_zpos = false;
+
+	plane = calloc(1, sizeof(*plane));
+	if (plane == NULL) {
+		return NULL;
+	}
+
+	drm_plane = drmModeGetPlane(display->drm_fd, id);
+	if (drm_plane == NULL) {
+		return NULL;
+	}
+	plane->id = drm_plane->plane_id;
+	plane->possible_crtcs = drm_plane->possible_crtcs;
+	drmModeFreePlane(drm_plane);
+
+	drm_props = drmModeObjectGetProperties(display->drm_fd, id,
+					       DRM_MODE_OBJECT_PLANE);
+	if (drm_props == NULL) {
+		return NULL;
+	}
+	plane->props = calloc(drm_props->count_props,
+			      sizeof(struct liftoff_plane_property));
+	if (plane->props == NULL) {
+		drmModeFreeObjectProperties(drm_props);
+		return NULL;
+	}
+	for (i = 0; i < drm_props->count_props; i++) {
+		drm_prop = drmModeGetProperty(display->drm_fd,
+					      drm_props->props[i]);
+		if (drm_prop == NULL) {
+			drmModeFreeObjectProperties(drm_props);
+			return NULL;
+		}
+		prop = &plane->props[i];
+		memcpy(prop->name, drm_prop->name, sizeof(prop->name));
+		prop->id = drm_prop->prop_id;
+		drmModeFreeProperty(drm_prop);
+		plane->props_len++;
+
+		value = drm_props->prop_values[i];
+		if (strcmp(prop->name, "type") == 0) {
+			plane->type = value;
+			has_type = true;
+		} else if (strcmp(prop->name, "zpos") == 0) {
+			plane->zpos = value;
+			has_zpos = true;
+		}
+	}
+	drmModeFreeObjectProperties(drm_props);
+
+	if (!has_type) {
+		liftoff_log(LIFTOFF_ERROR,
+			    "plane %"PRIu32" is missing the 'type' property",
+			    plane->id);
+		free(plane);
+		return NULL;
+	} else if (!has_zpos) {
+		plane->zpos = guess_plane_zpos_from_type(display, plane->id,
+							 plane->type);
+	}
+
+	/* During plane allocation, we will use the plane list order to fill
+	 * planes with FBs. Primary planes need to be filled first, then planes
+	 * far from the primary planes, then planes closer and closer to the
+	 * primary plane. */
+	if (plane->type == DRM_PLANE_TYPE_PRIMARY) {
+		liftoff_list_insert(&display->planes, &plane->link);
+	} else {
+		liftoff_list_for_each(cur, &display->planes, link) {
+			if (cur->type != DRM_PLANE_TYPE_PRIMARY &&
+			    plane->zpos >= cur->zpos) {
+				liftoff_list_insert(cur->link.prev, &plane->link);
+				break;
+			}
+		}
+
+		if (plane->link.next == NULL) { /* not inserted */
+			liftoff_list_insert(display->planes.prev, &plane->link);
+		}
+	}
+
+	return plane;
+}
+
+void plane_destroy(struct liftoff_plane *plane)
+{
+	liftoff_list_remove(&plane->link);
+	free(plane->props);
+	free(plane);
+}