diff --git a/Makefile.am b/Makefile.am
index 1e63a58c..c94c211e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -285,6 +285,7 @@ libwestoninclude_HEADERS =			\
 	libweston/compositor-rdp.h		\
 	libweston/compositor-wayland.h		\
 	libweston/compositor-x11.h		\
+	libweston/windowed-output-api.h		\
 	libweston/plugin-registry.h		\
 	libweston/timeline-object.h		\
 	shared/matrix.h				\
diff --git a/libweston/windowed-output-api.h b/libweston/windowed-output-api.h
new file mode 100644
index 00000000..e0f78b4d
--- /dev/null
+++ b/libweston/windowed-output-api.h
@@ -0,0 +1,92 @@
+/*
+ * Copyright © 2016 Armin Krezović
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef WESTON_WINDOWED_OUTPUT_API_H
+#define WESTON_WINDOWED_OUTPUT_API_H
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#include "plugin-registry.h"
+
+struct weston_compositor;
+struct weston_output;
+
+#define WESTON_WINDOWED_OUTPUT_API_NAME "weston_windowed_output_api_v1"
+
+struct weston_windowed_output_api {
+	/** Assign a given width and height to an output.
+	 *
+	 * \param output An output to be configured.
+	 * \param width  Desired width of the output.
+	 * \param height Desired height of the output.
+	 *
+	 * Returns 0 on success, -1 on failure.
+	 *
+	 * This assigns a desired width and height to a windowed
+         * output. The backend decides what should be done and applies
+	 * the desired configuration. After using this function and
+	 * generic weston_output_set_*, a windowed
+	 * output should be in a state where weston_output_enable()
+	 * can be run.
+	 */
+	int (*output_set_size)(struct weston_output *output,
+			       int width, int height);
+
+	/** Create a new windowed output.
+	 *
+	 * \param compositor The compositor instance.
+	 * \param name       Desired name for a new output.
+	 *
+	 * Returns 0 on success, -1 on failure.
+	 *
+	 * This creates a new output in the backend using this API.
+	 * After this function is ran, the created output should be
+	 * ready for configuration using the output_configure() and
+	 * weston_output_set_{scale,transform}().
+	 *
+	 * An optional name can be assigned to it, so it can be used
+	 * by compositor to configure it. It can't be NULL.
+	 */
+	int (*output_create)(struct weston_compositor *compositor,
+			     const char *name);
+};
+
+static inline const struct weston_windowed_output_api *
+weston_windowed_output_get_api(struct weston_compositor *compositor)
+{
+	const void *api;
+	api = weston_plugin_api_get(compositor, WESTON_WINDOWED_OUTPUT_API_NAME,
+				    sizeof(struct weston_windowed_output_api));
+
+	return (const struct weston_windowed_output_api *)api;
+}
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif /* WESTON_WINDOWED_OUTPUT_API_H */