VirtualBox

source: vbox/trunk/include/VBox/VBoxOGL.h@ 98103

Last change on this file since 98103 was 98103, checked in by vboxsync, 21 months ago

Copyright year updates by scm.

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File size: 2.8 KB
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1/* $Id: VBoxOGL.h 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * VBox 3D Support API
4 */
5/*
6 * Copyright (C) 2012-2023 Oracle and/or its affiliates.
7 *
8 * This file is part of VirtualBox base platform packages, as
9 * available from https://www.virtualbox.org.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation, in version 3 of the
14 * License.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, see <https://www.gnu.org/licenses>.
23 *
24 * The contents of this file may alternatively be used under the terms
25 * of the Common Development and Distribution License Version 1.0
26 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
27 * in the VirtualBox distribution, in which case the provisions of the
28 * CDDL are applicable instead of those of the GPL.
29 *
30 * You may elect to license modified versions of this file under the
31 * terms and conditions of either the GPL or the CDDL or both.
32 *
33 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
34 */
35
36#ifndef VBOX_INCLUDED_VBoxOGL_h
37#define VBOX_INCLUDED_VBoxOGL_h
38#ifndef RT_WITHOUT_PRAGMA_ONCE
39# pragma once
40#endif
41
42#include <iprt/cdefs.h>
43#include <iprt/types.h>
44
45RT_C_DECLS_BEGIN
46
47/* GUI and VBox OpenGL code require scaling factor value to be stored in container
48 * of type of 'double'. Communication between them is done via Main. In the same time,
49 * currently, Main does not like type of 'double' to be used for an interface method parameter.
50 * An integer type should be used instead. This value is used in order to specify scaling factor in type
51 * of 'integer' units. It is assumed that GUI feeds Main with its internal scaling factor value
52 * (which is originally of type of 'double') multiplied by this constant and converted resulting
53 * value to type of 'uint32_t'. Then Main provides this data to OpenGL HGCM thread. Finally, VBox OpenGL
54 * code divides received scalar by this constant and converts result to type of 'double'.
55 * This constant can be increased (multiplied by 10^n) in order to get better precision
56 * for scaling factor manipulations. */
57#define VBOX_OGL_SCALE_FACTOR_MULTIPLIER 10000.0
58
59/* 3D content scale factor range bounds. */
60#define VBOX_OGL_SCALE_FACTOR_MIN 0.01
61#define VBOX_OGL_SCALE_FACTOR_MAX 10.0
62
63bool RTCALL VBoxOglIsOfflineRenderingAppropriate(void);
64bool RTCALL VBoxOglIs3DAccelerationSupported(void);
65
66DECLEXPORT(int) VBoxOglSetScaleFactor(uint32_t idScreen, double dScaleFactorW, double dScaleFactorH);
67
68RT_C_DECLS_END
69
70#endif /* !VBOX_INCLUDED_VBoxOGL_h */
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