/*
 *  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.
 */

#include "pch.h"
#include "SamplerVkImpl.hpp"
#include "RenderDeviceVkImpl.hpp"
#include "VulkanTypeConversions.hpp"
#include "GraphicsAccessories.hpp"

namespace Diligent
{

SamplerVkImpl::SamplerVkImpl(IReferenceCounters* pRefCounters, RenderDeviceVkImpl* pRenderDeviceVk, const SamplerDesc& SamplerDesc) :
    // clang-format off
    TSamplerBase
    {
        pRefCounters,
        pRenderDeviceVk,
        SamplerDesc
    }
// clang-format on
{
    const auto& LogicalDevice = pRenderDeviceVk->GetLogicalDevice();

    VkSamplerCreateInfo SamplerCI = {};

    SamplerCI.sType            = VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO;
    SamplerCI.pNext            = nullptr;
    SamplerCI.flags            = 0; // reserved for future use
    SamplerCI.magFilter        = FilterTypeToVkFilter(m_Desc.MagFilter);
    SamplerCI.minFilter        = FilterTypeToVkFilter(m_Desc.MinFilter);
    SamplerCI.mipmapMode       = FilterTypeToVkMipmapMode(m_Desc.MipFilter);
    SamplerCI.addressModeU     = AddressModeToVkAddressMode(m_Desc.AddressU);
    SamplerCI.addressModeV     = AddressModeToVkAddressMode(m_Desc.AddressV);
    SamplerCI.addressModeW     = AddressModeToVkAddressMode(m_Desc.AddressW);
    SamplerCI.mipLodBias       = m_Desc.MipLODBias;
    SamplerCI.anisotropyEnable = IsAnisotropicFilter(m_Desc.MinFilter);
#ifdef DILIGENT_DEVELOPMENT
    if ((SamplerCI.anisotropyEnable != VK_FALSE) != IsAnisotropicFilter(m_Desc.MagFilter))
    {
        LOG_ERROR("Min and mag filters must both be either anisotropic filters or non-anisotropic ones");
    }
#endif

    SamplerCI.maxAnisotropy = static_cast<float>(m_Desc.MaxAnisotropy);
    SamplerCI.compareEnable = IsComparisonFilter(m_Desc.MinFilter);
#ifdef DILIGENT_DEVELOPMENT
    if ((SamplerCI.compareEnable != VK_FALSE) != IsComparisonFilter(m_Desc.MagFilter))
    {
        LOG_ERROR("Min and mag filters must both be either comparison filters or non-comparison ones");
    }
#endif

    SamplerCI.compareOp               = ComparisonFuncToVkCompareOp(m_Desc.ComparisonFunc);
    SamplerCI.minLod                  = m_Desc.MinLOD;
    SamplerCI.maxLod                  = m_Desc.MaxLOD;
    SamplerCI.borderColor             = BorderColorToVkBorderColor(m_Desc.BorderColor);
    SamplerCI.unnormalizedCoordinates = VK_FALSE;

    m_VkSampler = LogicalDevice.CreateSampler(SamplerCI);
}

SamplerVkImpl::~SamplerVkImpl()
{
    m_pDevice->SafeReleaseDeviceObject(std::move(m_VkSampler), m_CommandQueueMask);
}

} // namespace Diligent