DynamicBuffer.hpp

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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
 
 
#include "../../GraphicsEngine/interface/RenderDevice.h"
#include "../../GraphicsEngine/interface/DeviceContext.h"
#include "../../GraphicsEngine/interface/Buffer.h"
#include "../../../Common/interface/RefCntAutoPtr.hpp"
 
namespace Diligent
{
 
class DynamicBuffer
{
public:
 
    DynamicBuffer(IRenderDevice* pDevice, const BufferDesc& Desc);
 
    // clang-format off
    DynamicBuffer           (const DynamicBuffer&)  = delete;
    DynamicBuffer& operator=(const DynamicBuffer&)  = delete;
    DynamicBuffer           (      DynamicBuffer&&) = delete;
    DynamicBuffer& operator=(      DynamicBuffer&&) = delete;
    // clang-format on
 
 
 
    IBuffer* Resize(IRenderDevice*  pDevice,
                    IDeviceContext* pContext,
                    Uint32          NewSize);
 
 
 
    IBuffer* GetBuffer(IRenderDevice*  pDevice,
                       IDeviceContext* pContext);
 
 
    bool PendingUpdate() const
    {
        return (m_Desc.uiSizeInBytes > 0) && (!m_pBuffer || m_pStaleBuffer);
    }
 
 
    const BufferDesc& GetDesc()
    {
        return m_Desc;
    }
 
 
    Uint32 GetVersion() const
    {
        return m_Version;
    }
 
private:
    void CommitResize(IRenderDevice*  pDevice,
                      IDeviceContext* pContext);
 
    BufferDesc        m_Desc;
    const std::string m_Name;
    Uint32            m_Version = 0;
 
    RefCntAutoPtr<IBuffer> m_pBuffer;
    RefCntAutoPtr<IBuffer> m_pStaleBuffer;
};
 
} // namespace Diligent