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+/*
+ Copyright 2012-2019 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+/**
+ @file pugl_gl.h OpenGL-specific API.
+*/
+
+#ifndef PUGL_PUGL_GL_H
+#define PUGL_PUGL_GL_H
+
+#include "pugl/pugl.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ OpenGL extension function.
+*/
+typedef void (*PuglGlFunc)(void);
+
+/**
+ Return the address of an OpenGL extension function.
+*/
+PUGL_API PuglGlFunc
+puglGetProcAddress(const char* name);
+
+/**
+ OpenGL graphics backend.
+
+ Pass the return value to puglInitBackend() to draw to a view with OpenGL.
+*/
+PUGL_API const PuglBackend*
+puglGlBackend(void);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif // PUGL_PUGL_GL_H