1/****************************************************************************
2**
3** Copyright (C) 2019 Klaralvdalens Datakonsult AB (KDAB).
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the Qt3D module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#ifndef QT3DRENDER_RENDER_OPENGL_TEXTURESUBMISSIONCONTEXT_H
41#define QT3DRENDER_RENDER_OPENGL_TEXTURESUBMISSIONCONTEXT_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists for the convenience
48// of other Qt classes. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54
55#include <qglobal.h>
56#include <QVector>
57
58QT_BEGIN_NAMESPACE
59
60class QOpenGLContext;
61
62namespace Qt3DRender {
63namespace Render {
64namespace OpenGL {
65
66class GraphicsContext;
67class GLTexture;
68
69class Q_AUTOTEST_EXPORT TextureSubmissionContext
70{
71public:
72 enum TextureScope
73 {
74 TextureScopeMaterial = 0,
75 TextureScopeTechnique
76 // per-pass for deferred rendering?
77 };
78
79 TextureSubmissionContext();
80 ~TextureSubmissionContext();
81
82 void initialize(GraphicsContext *context);
83 void endDrawing();
84 int activateTexture(TextureScope scope, QOpenGLContext *gl, GLTexture* tex);
85 void deactivateTexture(GLTexture *tex);
86 void deactivateTexturesWithScope(TextureScope ts);
87
88private:
89 void decayTextureScores();
90 int assignUnitForTexture(GLTexture* tex);
91
92 // active textures, indexed by texture unit
93 struct ActiveTexture {
94 GLTexture *texture = nullptr;
95 int score = 0;
96 TextureScope scope = TextureScopeMaterial;
97 bool pinned = false;
98 };
99 QVector<ActiveTexture> m_activeTextures;
100};
101
102} // namespace OpenGL
103} // namespace Render
104} // namespace Qt3DRender
105
106QT_END_NAMESPACE
107
108#endif // QT3DRENDER_RENDER_OPENGL_TEXTURESUBMISSIONCONTEXT_H
109

source code of qt3d/src/plugins/renderers/opengl/graphicshelpers/texturesubmissioncontext_p.h