1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB). 4 ** Copyright (C) 2016 The Qt Company Ltd and/or its subsidiary(-ies). 5 ** Contact: https://www.qt.io/licensing/ 6 ** 7 ** This file is part of the Qt3D module of the Qt Toolkit. 8 ** 9 ** $QT_BEGIN_LICENSE:LGPL$ 10 ** Commercial License Usage 11 ** Licensees holding valid commercial Qt licenses may use this file in 12 ** accordance with the commercial license agreement provided with the 13 ** Software or, alternatively, in accordance with the terms contained in 14 ** a written agreement between you and The Qt Company. For licensing terms 15 ** and conditions see https://www.qt.io/terms-conditions. For further 16 ** information use the contact form at https://www.qt.io/contact-us. 17 ** 18 ** GNU Lesser General Public License Usage 19 ** Alternatively, this file may be used under the terms of the GNU Lesser 20 ** General Public License version 3 as published by the Free Software 21 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 22 ** packaging of this file. Please review the following information to 23 ** ensure the GNU Lesser General Public License version 3 requirements 24 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 25 ** 26 ** GNU General Public License Usage 27 ** Alternatively, this file may be used under the terms of the GNU 28 ** General Public License version 2.0 or (at your option) the GNU General 29 ** Public license version 3 or any later version approved by the KDE Free 30 ** Qt Foundation. The licenses are as published by the Free Software 31 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 32 ** included in the packaging of this file. Please review the following 33 ** information to ensure the GNU General Public License requirements will 34 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 35 ** https://www.gnu.org/licenses/gpl-3.0.html. 36 ** 37 ** $QT_END_LICENSE$ 38 ** 39 ****************************************************************************/ 40 41 #ifndef QT3DRENDER_RENDER_RENDERSTATE_H 42 #define QT3DRENDER_RENDER_RENDERSTATE_H 43 44 // 45 // W A R N I N G 46 // ------------- 47 // 48 // This file is not part of the Qt API. It exists for the convenience 49 // of other Qt classes. This header file may change from version to 50 // version without notice, or even be removed. 51 // 52 // We mean it. 53 // 54 55 #include <Qt3DRender/private/genericstate_p.h> 56 #include <Qt3DRender/private/renderstates_p.h> 57 #include <Qt3DRender/private/statevariant_p.h> 58 #include <QVector> 59 60 QT_BEGIN_NAMESPACE 61 62 namespace Qt3DRender { 63 64 class QRenderState; 65 66 namespace Render { 67 68 class RenderState; 69 70 class Q_3DRENDERSHARED_PRIVATE_EXPORT RenderStateSet 71 { 72 public: 73 RenderStateSet(); 74 ~RenderStateSet(); 75 76 template<typename GenericState> addState(const GenericState & state)77 void addState(const GenericState &state) 78 { 79 addState(StateVariant::fromValue(state)); 80 } 81 82 /** 83 * @brief changeCost - metric of cost to change to this state-set from 84 * a candidate previous state-set. This is used to find an optimal 85 * ordering of state-sets when sending draw commands. 86 * @param previousState 87 * @return 88 */ 89 int changeCost(RenderStateSet* previousState); 90 91 StateMaskSet stateMask() const; 92 void merge(const RenderStateSet *other); 93 states()94 const QVector<StateVariant>& states() const noexcept { return m_states; } states()95 QVector<StateVariant>& states() noexcept { return m_states; } 96 97 bool canAddStateOfType(StateMask type) const; 98 99 /** 100 * @brief contains - check if this set contains a matching piece of state 101 * @param ds 102 * @return 103 */ 104 bool contains(const StateVariant &ds) const; 105 106 private: 107 bool hasStateOfType(StateMask type) const; 108 bool allowMultipleStatesOfType(StateMask type) const; 109 110 private: 111 StateMaskSet m_stateMask; 112 QVector<StateVariant> m_states; 113 }; 114 115 template<> 116 Q_3DRENDERSHARED_PRIVATE_EXPORT void RenderStateSet::addState<StateVariant>(const StateVariant &state); 117 118 } // namespace Render 119 } // namespace Qt3DRender 120 121 QT_END_NAMESPACE 122 123 #endif // QT3DRENDER_RENDER_RENDERSTATE_H 124