#ifndef _MIXER_H
#define _MIXER_H 1
+#include <epoxy/gl.h>
+#include <functional>
+
#include "ref_counted_gl_sync.h"
class QSurface;
+
void start_mixer(QSurface *surface, QSurface *surface2, QSurface *surface3, QSurface *surface4);
void mixer_quit();