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/*
* Copyright 2019-2021 Diligent Graphics LLC
* Copyright 2015-2019 Egor Yusov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#pragma once
/// \file
/// Implementation of the Diligent::BufferViewBase template class
#include "BufferView.h"
#include "DeviceObjectBase.hpp"
#include "GraphicsTypes.h"
#include "RefCntAutoPtr.hpp"
namespace Diligent
{
/// Template class implementing base functionality of the buffer view object
/// \tparam EngineImplTraits - Engine implementation type traits.
template <typename EngineImplTraits>
class BufferViewBase : public DeviceObjectBase<typename EngineImplTraits::BufferViewInterface, typename EngineImplTraits::RenderDeviceImplType, BufferViewDesc>
{
public:
// Base interface that this class inherits (IBufferViewD3D12, IBufferViewVk, etc.).
using BaseInterface = typename EngineImplTraits::BufferViewInterface;
// Render device implementation type (RenderDeviceD3D12Impl, RenderDeviceVkImpl, etc.).
using RenderDeviceImplType = typename EngineImplTraits::RenderDeviceImplType;
// Buffer implementation type (BufferD3D12Impl, BufferVkImpl, etc.).
using BufferImplType = typename EngineImplTraits::BufferImplType;
using TDeviceObjectBase = DeviceObjectBase<BaseInterface, RenderDeviceImplType, BufferViewDesc>;
/// \param pRefCounters - Reference counters object that controls the lifetime of this buffer view.
/// \param pDevice - Pointer to the render device.
/// \param ViewDesc - Buffer view description.
/// \param pBuffer - Pointer to the buffer that the view is to be created for.
/// \param bIsDefaultView - Flag indicating if the view is a default view, and is thus
/// part of the buffer object. In this case the view will attach
/// to the buffer's reference counters.
BufferViewBase(IReferenceCounters* pRefCounters,
RenderDeviceImplType* pDevice,
const BufferViewDesc& ViewDesc,
IBuffer* pBuffer,
bool bIsDefaultView) :
// Default views are created as part of the buffer, so we cannot not keep strong
// reference to the buffer to avoid cyclic links. Instead, we will attach to the
// reference counters of the buffer.
TDeviceObjectBase(pRefCounters, pDevice, ViewDesc),
m_pBuffer{pBuffer},
// For non-default view, we will keep strong reference to buffer
m_spBuffer{bIsDefaultView ? nullptr : pBuffer}
{}
IMPLEMENT_QUERY_INTERFACE_IN_PLACE(IID_BufferView, TDeviceObjectBase)
/// Implementation of IBufferView::GetBuffer()
virtual IBuffer* DILIGENT_CALL_TYPE GetBuffer() const override final
{
return m_pBuffer;
}
template <typename BufferType>
BufferType* GetBuffer()
{
return ValidatedCast<BufferType>(m_pBuffer);
}
template <typename BufferType>
BufferType* GetBuffer() const
{
return ValidatedCast<BufferType>(m_pBuffer);
}
protected:
/// Pointer to the buffer
IBuffer* const m_pBuffer;
/// Strong reference to the buffer. Used for non-default views
/// to keep the buffer alive
RefCntAutoPtr<IBuffer> m_spBuffer;
};
} // namespace Diligent
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