--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DPF-Prymula-audioplugins/dpf/dgl/src/pugl-upstream/include/pugl/gl.h	Mon Oct 16 21:53:34 2023 +0200
@@ -0,0 +1,94 @@
+// Copyright 2012-2020 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#ifndef PUGL_GL_H
+#define PUGL_GL_H
+
+#include "pugl/pugl.h"
+
+// IWYU pragma: begin_exports
+
+/* Unfortunately, GL includes vary across platforms, so include them here to
+   enable pure portable programs. */
+
+#ifndef PUGL_NO_INCLUDE_GL_H
+#  ifdef __APPLE__
+#    include <OpenGL/gl.h>
+#  else
+#    ifdef _WIN32
+#      include <windows.h>
+#    endif
+#    include <GL/gl.h>
+#  endif
+#endif
+
+#ifndef PUGL_NO_INCLUDE_GLU_H
+#  ifdef __APPLE__
+#    include <OpenGL/glu.h>
+#  else
+#    ifdef _WIN32
+#      include <windows.h>
+#    endif
+#    include <GL/glu.h>
+#  endif
+#endif
+
+// IWYU pragma: end_exports
+
+PUGL_BEGIN_DECLS
+
+/**
+   @defgroup gl OpenGL
+   OpenGL graphics support.
+   @ingroup pugl
+   @{
+*/
+
+/**
+   OpenGL extension function.
+*/
+typedef void (*PuglGlFunc)(void);
+
+/**
+   Return the address of an OpenGL extension function.
+*/
+PUGL_API
+PuglGlFunc
+puglGetProcAddress(const char* name);
+
+/**
+   Enter the OpenGL context.
+
+   This can be used to enter the graphics context in unusual situations, for
+   doing things like loading textures.  Note that this must not be used for
+   drawing, which may only be done while processing an expose event.
+*/
+PUGL_API
+PuglStatus
+puglEnterContext(PuglView* view);
+
+/**
+   Leave the OpenGL context.
+
+   This must only be called after puglEnterContext().
+*/
+PUGL_API
+PuglStatus
+puglLeaveContext(PuglView* view);
+
+/**
+   OpenGL graphics backend.
+
+   Pass the returned value to puglSetBackend() to draw to a view with OpenGL.
+*/
+PUGL_CONST_API
+const PuglBackend*
+puglGlBackend(void);
+
+PUGL_END_DECLS
+
+/**
+   @}
+*/
+
+#endif // PUGL_GL_H