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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::PipelineResourceAttribsGL struct
#include "BasicTypes.h"
#include "DebugUtilities.hpp"
#include "HashUtils.hpp"
namespace Diligent
{
// sizeof(PipelineResourceAttribsGL) == 8, x64
struct PipelineResourceAttribsGL
{
private:
static constexpr Uint32 _SamplerIndBits = 31;
static constexpr Uint32 _SamplerAssignedBits = 1;
public:
static constexpr Uint32 InvalidCacheOffset = ~0u;
static constexpr Uint32 InvalidSamplerInd = (1u << _SamplerIndBits) - 1;
// clang-format off
const Uint32 CacheOffset; // SRB and Signature use the same cache offsets for static resources.
// (thanks to sorting variables by type, where all static vars go first).
// Binding == BaseBinding[Range] + CacheOffset
const Uint32 SamplerInd : _SamplerIndBits; // ImtblSamplerAssigned == true: index of the immutable sampler in m_ImmutableSamplers.
// ImtblSamplerAssigned == false: index of the assigned sampler in m_Desc.Resources.
const Uint32 ImtblSamplerAssigned : _SamplerAssignedBits; // Immutable sampler flag
// clang-format on
PipelineResourceAttribsGL(Uint32 _CacheOffset,
Uint32 _SamplerInd,
bool _ImtblSamplerAssigned) noexcept :
// clang-format off
CacheOffset {_CacheOffset },
SamplerInd {_SamplerInd },
ImtblSamplerAssigned{_ImtblSamplerAssigned ? 1u : 0u}
// clang-format on
{
VERIFY(SamplerInd == _SamplerInd, "Sampler index (", _SamplerInd, ") exceeds maximum representable value");
VERIFY(!_ImtblSamplerAssigned || SamplerInd != InvalidSamplerInd, "Immutable sampler is assigned, but sampler index is not valid");
}
bool IsSamplerAssigned() const
{
return SamplerInd != InvalidSamplerInd;
}
bool IsImmutableSamplerAssigned() const
{
return ImtblSamplerAssigned != 0;
}
bool IsCompatibleWith(const PipelineResourceAttribsGL& rhs) const
{
// Ignore sampler index.
// clang-format off
return CacheOffset == rhs.CacheOffset &&
ImtblSamplerAssigned == rhs.ImtblSamplerAssigned;
// clang-format on
}
size_t GetHash() const
{
return ComputeHash(CacheOffset, ImtblSamplerAssigned);
}
};
} // namespace Diligent
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