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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
/// Implementation of the Diligent::TextureViewBase template class
#include "TextureView.h"
#include "DeviceObjectBase.hpp"
#include "RefCntAutoPtr.hpp"
#include "GraphicsAccessories.hpp"
namespace Diligent
{
/// Template class implementing base functionality of the texture view interface
/// \tparam EngineImplTraits - Engine implementation type traits.
template <typename EngineImplTraits>
class TextureViewBase : public DeviceObjectBase<typename EngineImplTraits::TextureViewInterface, typename EngineImplTraits::RenderDeviceImplType, TextureViewDesc>
{
public:
// Base interface that this class inherits (ITextureViewD3D12, ITextureViewVk, etc.).
using BaseInterface = typename EngineImplTraits::TextureViewInterface;
// Render device implementation type (RenderDeviceD3D12Impl, RenderDeviceVkImpl, etc.).
using RenderDeviceImplType = typename EngineImplTraits::RenderDeviceImplType;
using TDeviceObjectBase = DeviceObjectBase<BaseInterface, RenderDeviceImplType, TextureViewDesc>;
/// \param pRefCounters - Reference counters object that controls the lifetime of this texture view.
/// \param pDevice - Pointer to the render device.
/// \param ViewDesc - Texture view description.
/// \param pTexture - Pointer to the texture that the view is to be created for.
/// \param bIsDefaultView - Flag indicating if the view is default view, and is thus
/// part of the texture object. In this case the view will attach
/// to the texture's reference counters.
TextureViewBase(IReferenceCounters* pRefCounters,
RenderDeviceImplType* pDevice,
const TextureViewDesc& ViewDesc,
ITexture* pTexture,
bool bIsDefaultView) :
// Default views are created as part of the texture, so we cannot not keep strong
// reference to the texture to avoid cyclic links. Instead, we will attach to the
// reference counters of the texture.
TDeviceObjectBase(pRefCounters, pDevice, ViewDesc),
m_pTexture(pTexture),
// For non-default view, we will keep strong reference to texture
m_spTexture(bIsDefaultView ? nullptr : pTexture)
{}
IMPLEMENT_QUERY_INTERFACE_IN_PLACE(IID_TextureView, TDeviceObjectBase)
/// Implementation of ITextureView::SetSampler()
virtual void DILIGENT_CALL_TYPE SetSampler(ISampler* pSampler) override final
{
#ifdef DILIGENT_DEVELOPMENT
if (this->m_Desc.ViewType != TEXTURE_VIEW_SHADER_RESOURCE)
LOG_ERROR("Texture view \"", this->m_Desc.Name, "\": a sampler can be attached to a shader resource view only. The view type is ", GetTexViewTypeLiteralName(this->m_Desc.ViewType));
#endif
m_pSampler = pSampler;
}
/// Implementation of ITextureView::GetSampler()
virtual ISampler* DILIGENT_CALL_TYPE GetSampler() override final
{
return m_pSampler;
}
const ISampler* GetSampler() const
{
return m_pSampler;
}
/// Implementation of ITextureView::GetTexture()
virtual ITexture* DILIGENT_CALL_TYPE GetTexture() override final
{
return m_pTexture;
}
const ITexture* DILIGENT_CALL_TYPE GetTexture() const
{
return m_pTexture;
}
template <typename TextureType>
TextureType* GetTexture()
{
return ValidatedCast<TextureType>(m_pTexture);
}
template <typename TextureType>
TextureType* GetTexture() const
{
return ValidatedCast<TextureType>(m_pTexture);
}
protected:
/// Strong reference to the sampler
RefCntAutoPtr<ISampler> m_pSampler;
/// Raw pointer to the texture
ITexture* const m_pTexture;
/// Strong reference to the texture. Used for non-default views
/// to keep the texture alive
RefCntAutoPtr<ITexture> m_spTexture;
};
} // namespace Diligent
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