Add Chromium-only Blender WebEngine parity work

blender-5.2.0/source/blender/sequencer/SEQ_offscreen.hh

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+/* SPDX-FileCopyrightText: 2004 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#pragma once
+
+/** \file
+ * \ingroup sequencer
+ */
+
+#include "DNA_object_enums.h"
+#include "DNA_sequence_types.h"
+#include "DNA_view3d_enums.h"
+
+#include "IMB_imbuf_types.hh"
+
+namespace blender {
+
+struct Depsgraph;
+struct GPUOffScreen;
+struct GPUViewport;
+struct ImBuf;
+struct Object;
+struct Scene;
+struct View3DShading;
+
+namespace seq {
+using DrawViewFn = ImBuf *(*)(Depsgraph *,
+                              Scene *,
+                              View3DShading *,
+                              eDrawType,
+                              Object *,
+                              int,
+                              int,
+                              ImBufFlags,
+                              eV3DOffscreenDrawFlag,
+                              int,
+                              const char *,
+                              GPUOffScreen *,
+                              GPUViewport *,
+                              char *);
+extern DrawViewFn view3d_fn;
+}  // namespace seq
+}  // namespace blender