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diff --git a/src/internal.h b/src/internal.h
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+// Copyright 2012-2022 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#ifndef PUGL_INTERNAL_H
+#define PUGL_INTERNAL_H
+
+#include "attributes.h"
+#include "types.h"
+
+#include "pugl/pugl.h"
+
+#include <stddef.h>
+#include <stdint.h>
+
+PUGL_BEGIN_DECLS
+
+/// Set `blob` to `data` with length `len`, reallocating if necessary
+PuglStatus
+puglSetBlob(PuglBlob* dest, const void* data, size_t len);
+
+/// Reallocate and set `*dest` to `string`
+void
+puglSetString(char** dest, const char* string);
+
+/// Allocate and initialise world internals (implemented once per platform)
+PuglWorldInternals*
+puglInitWorldInternals(PuglWorldType type, PuglWorldFlags flags);
+
+/// Destroy and free world internals (implemented once per platform)
+void
+puglFreeWorldInternals(PuglWorld* world);
+
+/// Allocate and initialise view internals (implemented once per platform)
+PuglInternals*
+puglInitViewInternals(PuglWorld* world);
+
+/// Destroy and free view internals (implemented once per platform)
+void
+puglFreeViewInternals(PuglView* view);
+
+/// Return the Unicode code point for `buf` or the replacement character
+uint32_t
+puglDecodeUTF8(const uint8_t* buf);
+
+/// Dispatch an event with a simple `type` to `view`
+PuglStatus
+puglDispatchSimpleEvent(PuglView* view, PuglEventType type);
+
+/// Process configure event while already in the graphics context
+PUGL_WARN_UNUSED_RESULT
+PuglStatus
+puglConfigure(PuglView* view, const PuglEvent* event);
+
+/// Process expose event while already in the graphics context
+PUGL_WARN_UNUSED_RESULT
+PuglStatus
+puglExpose(PuglView* view, const PuglEvent* event);
+
+/// Dispatch `event` to `view`, entering graphics context if necessary
+PuglStatus
+puglDispatchEvent(PuglView* view, const PuglEvent* event);
+
+PUGL_END_DECLS
+
+#endif // PUGL_INTERNAL_H