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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
/// Declaration of Diligent::RenderPassCache class
#include <unordered_map>
#include <mutex>
#include "GraphicsTypes.h"
#include "Constants.h"
#include "HashUtils.hpp"
#include "VulkanUtilities/VulkanObjectWrappers.hpp"
#include "RefCntAutoPtr.hpp"
namespace Diligent
{
class RenderDeviceVkImpl;
class RenderPassVkImpl;
class RenderPassCache
{
public:
RenderPassCache(RenderDeviceVkImpl& DeviceVk) noexcept;
// clang-format off
RenderPassCache (const RenderPassCache&) = delete;
RenderPassCache (RenderPassCache&&) = delete;
RenderPassCache& operator = (const RenderPassCache&) = delete;
RenderPassCache& operator = (RenderPassCache&&) = delete;
// clang-format on
~RenderPassCache();
// This structure is used as the key to find framebuffer
struct RenderPassCacheKey
{
// clang-format off
RenderPassCacheKey() :
NumRenderTargets{0},
SampleCount {0},
DSVFormat {TEX_FORMAT_UNKNOWN}
{}
// clang-format on
RenderPassCacheKey(Uint32 _NumRenderTargets,
Uint32 _SampleCount,
const TEXTURE_FORMAT _RTVFormats[],
TEXTURE_FORMAT _DSVFormat) :
// clang-format off
NumRenderTargets{static_cast<decltype(NumRenderTargets)>(_NumRenderTargets)},
SampleCount {static_cast<decltype(SampleCount)> (_SampleCount) },
DSVFormat {_DSVFormat }
// clang-format on
{
VERIFY_EXPR(_NumRenderTargets <= std::numeric_limits<decltype(NumRenderTargets)>::max());
VERIFY_EXPR(_SampleCount <= std::numeric_limits<decltype(SampleCount)>::max());
for (Uint32 rt = 0; rt < NumRenderTargets; ++rt)
RTVFormats[rt] = _RTVFormats[rt];
}
// Default memeber initialization is intentionally omitted
Uint8 NumRenderTargets;
Uint8 SampleCount;
TEXTURE_FORMAT DSVFormat;
TEXTURE_FORMAT RTVFormats[MAX_RENDER_TARGETS];
bool operator==(const RenderPassCacheKey& rhs) const
{
// clang-format off
if (GetHash() != rhs.GetHash() ||
NumRenderTargets != rhs.NumRenderTargets ||
SampleCount != rhs.SampleCount ||
DSVFormat != rhs.DSVFormat)
{
return false;
}
// clang-format on
for (Uint32 rt = 0; rt < NumRenderTargets; ++rt)
if (RTVFormats[rt] != rhs.RTVFormats[rt])
return false;
return true;
}
size_t GetHash() const
{
if (Hash == 0)
{
Hash = ComputeHash(NumRenderTargets, SampleCount, DSVFormat);
for (Uint32 rt = 0; rt < NumRenderTargets; ++rt)
HashCombine(Hash, RTVFormats[rt]);
}
return Hash;
}
private:
mutable size_t Hash = 0;
};
RenderPassVkImpl* GetRenderPass(const RenderPassCacheKey& Key);
void Destroy();
private:
struct RenderPassCacheKeyHash
{
std::size_t operator()(const RenderPassCacheKey& Key) const
{
return Key.GetHash();
}
};
RenderDeviceVkImpl& m_DeviceVkImpl;
std::mutex m_Mutex;
std::unordered_map<RenderPassCacheKey, RefCntAutoPtr<RenderPassVkImpl>, RenderPassCacheKeyHash> m_Cache;
};
} // namespace Diligent
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