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// Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
// Copyright (C) 2016 The Qt Company Ltd and/or its subsidiary(-ies).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QT3DRENDER_RENDER_RENDERSTATE_H
#define QT3DRENDER_RENDER_RENDERSTATE_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <Qt3DRender/private/genericstate_p.h>
#include <Qt3DRender/private/renderstates_p.h>
#include <Qt3DRender/private/statevariant_p.h>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
class QRenderState;
namespace Render {
class RenderState;
class Q_3DRENDERSHARED_PRIVATE_EXPORT RenderStateSet
{
public:
RenderStateSet();
~RenderStateSet();
template<typename GenericState>
void addState(const GenericState &state)
{
addState(StateVariant::fromValue(state));
}
/**
* @brief changeCost - metric of cost to change to this state-set from
* a candidate previous state-set. This is used to find an optimal
* ordering of state-sets when sending draw commands.
* @param previousState
* @return
*/
int changeCost(RenderStateSet* previousState);
StateMaskSet stateMask() const;
void merge(const RenderStateSet *other);
const std::vector<StateVariant>& states() const noexcept { return m_states; }
std::vector<StateVariant>& states() noexcept { return m_states; }
bool canAddStateOfType(StateMask type) const;
/**
* @brief contains - check if this set contains a matching piece of state
* @param ds
* @return
*/
bool contains(const StateVariant &ds) const;
private:
bool hasStateOfType(StateMask type) const;
bool allowMultipleStatesOfType(StateMask type) const;
private:
StateMaskSet m_stateMask;
std::vector<StateVariant> m_states;
};
template<>
Q_3DRENDERSHARED_PRIVATE_EXPORT void RenderStateSet::addState<StateVariant>(const StateVariant &state);
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
#endif // QT3DRENDER_RENDER_RENDERSTATE_H
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