/*     Copyright 2015-2018 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
 * 
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS.
 *
 *  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 "RenderDevice.h"
#include "DeviceContext.h"

namespace Diligent
{
    struct UploadBufferDesc
    {
        Uint32 Width = 0;
        Uint32 Height = 0;
        Uint32 Depth = 1;
        TEXTURE_FORMAT Format = TEX_FORMAT_UNKNOWN;

        bool operator == (const UploadBufferDesc &rhs) const
        {
            return Width  == rhs.Width  && 
                   Height == rhs.Height &&
                   Depth  == rhs.Depth  &&
                   Format == rhs.Format;
        }
    };

    class IUploadBuffer : public IObject
    {
    public:
        virtual void WaitForCopyScheduled() = 0;
        virtual void* GetDataPtr() = 0;
        virtual size_t GetRowStride()  const = 0;
        virtual size_t GetDepthStride()const = 0;
        virtual const UploadBufferDesc& GetDesc()const = 0;
    };

    struct TextureUploaderDesc
    {

    };

    class ITextureUploader : public IObject
    {
    public:
        virtual void RenderThreadUpdate(IDeviceContext *pContext) = 0;
        virtual void AllocateUploadBuffer(const UploadBufferDesc& Desc, bool IsRenderThread, IUploadBuffer **ppBuffer) = 0;
        virtual void ScheduleGPUCopy(ITexture *pDstTexture, Uint32 ArraySlice, Uint32 MipLevel, IUploadBuffer *pUploadBuffer) = 0;
        virtual void RecycleBuffer(IUploadBuffer *pUploadBuffer) = 0;
    };

    void CreateTextureUploader(IRenderDevice *pDevice, const TextureUploaderDesc& Desc, ITextureUploader **ppUploader);
}
