source/blender/draw/engines/external/external_engine.h


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/* SPDX-License-Identifier: GPL-2.0-or-later
 * Copyright 2017 Blender Foundation. */

/** \file
 * \ingroup draw_engine
 */

#pragma once

extern DrawEngineType draw_engine_external_type;
extern RenderEngineType DRW_engine_viewport_external_type;

/* Check whether an external engine is to be used to draw content of an image editor.
 * If the drawing is possible, the render engine is "acquired" so that it is not freed by the
 * render engine for until drawing is finished.
 *
 * NOTE: Released by the draw engine when it is done drawing. */
bool DRW_engine_external_acquire_for_image_editor(void);