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#pragma once
#include "slang-gfx.h"
#include "core/slang-basic.h"
#include "core/slang-com-object.h"
#include "renderer-shared.h"
namespace gfx
{
class ShaderObjectLayoutBase;
template<typename T>
class VersionedObjectPool
{
public:
struct ObjectVersion
{
Slang::RefPtr<T> object;
Slang::RefPtr<TransientResourceHeapBase> transientHeap;
uint64_t transientHeapVersion;
bool canRecycle()
{
return (transientHeap->getVersion() != transientHeapVersion);
}
};
Slang::List<ObjectVersion> objects;
SlangInt lastAllocationIndex = -1;
ObjectVersion& allocate(TransientResourceHeapBase* currentTransientHeap)
{
for (SlangInt i = 0; i < objects.getCount(); i++)
{
auto& object = objects[i];
if (object.canRecycle())
{
object.transientHeap = currentTransientHeap;
object.transientHeapVersion = currentTransientHeap->getVersion();
lastAllocationIndex = i;
return object;
}
}
ObjectVersion v;
v.transientHeap = currentTransientHeap;
v.transientHeapVersion = currentTransientHeap->getVersion();
objects.add(v);
lastAllocationIndex = objects.getCount() - 1;
return objects.getLast();
}
ObjectVersion& getLastAllocation() { return objects[lastAllocationIndex]; }
};
class MutableShaderObjectData
{
public:
// Any "ordinary" / uniform data for this object
Slang::List<char> m_ordinaryData;
bool m_dirty = true;
Slang::Index getCount() { return m_ordinaryData.getCount(); }
void setCount(Slang::Index count) { m_ordinaryData.setCount(count); }
char* getBuffer() { return m_ordinaryData.getBuffer(); }
void markDirty() { m_dirty = true; }
// We don't actually create any GPU buffers here, since they will be handled
// by the immutable shader objects once the user calls `getCurrentVersion`.
ResourceViewBase* getResourceView(
RendererBase* device,
slang::TypeLayoutReflection* elementLayout,
slang::BindingType bindingType)
{
return nullptr;
}
};
template<typename TShaderObject, typename TShaderObjectLayoutImpl>
class MutableShaderObject : public ShaderObjectBaseImpl<
TShaderObject,
TShaderObjectLayoutImpl,
MutableShaderObjectData>
{
typedef ShaderObjectBaseImpl<
TShaderObject,
TShaderObjectLayoutImpl,
MutableShaderObjectData> Super;
protected:
Slang::OrderedDictionary<ShaderOffset, Slang::RefPtr<ResourceViewBase>> m_resources;
Slang::OrderedDictionary<ShaderOffset, Slang::RefPtr<SamplerStateBase>> m_samplers;
Slang::OrderedHashSet<ShaderOffset> m_objectOffsets;
VersionedObjectPool<ShaderObjectBase> m_shaderObjectVersions;
bool m_dirty = true;
bool isDirty()
{
if (m_dirty) return true;
if (this->m_data.m_dirty) return true;
for (auto& object : this->m_objects)
{
if (object && object->isDirty())
return true;
}
return false;
}
void markDirty()
{
m_dirty = true;
}
public:
Result init(RendererBase* device, ShaderObjectLayoutBase* layout)
{
this->m_device = device;
auto layoutImpl = static_cast<TShaderObjectLayoutImpl*>(layout);
this->m_layout = layoutImpl;
Slang::Index subObjectCount = layoutImpl->getSubObjectCount();
this->m_objects.setCount(subObjectCount);
return SLANG_OK;
}
public:
virtual SLANG_NO_THROW const void* SLANG_MCALL getRawData() override
{
return this->m_data.getBuffer();
}
virtual SLANG_NO_THROW size_t SLANG_MCALL getSize() override
{
return this->m_data.getCount();
}
virtual SLANG_NO_THROW Result SLANG_MCALL setData(ShaderOffset const& offset, void const* data, size_t size) override
{
if (!size) return SLANG_OK;
if (SlangInt(offset.uniformOffset + size) > this->m_data.getCount())
this->m_data.setCount(offset.uniformOffset + size);
memcpy(this->m_data.getBuffer() + offset.uniformOffset, data, size);
this->m_data.markDirty();
markDirty();
return SLANG_OK;
}
virtual SLANG_NO_THROW Result SLANG_MCALL
setObject(ShaderOffset const& offset, IShaderObject* object) override
{
Super::setObject(offset, object);
m_objectOffsets.Add(offset);
markDirty();
return SLANG_OK;
}
virtual SLANG_NO_THROW Result SLANG_MCALL setResource(ShaderOffset const& offset, IResourceView* resourceView) override
{
m_resources[offset] = static_cast<ResourceViewBase*>(resourceView);
markDirty();
return SLANG_OK;
}
virtual SLANG_NO_THROW Result SLANG_MCALL setSampler(ShaderOffset const& offset, ISamplerState* sampler) override
{
m_samplers[offset] = static_cast<SamplerStateBase*>(sampler);
markDirty();
return SLANG_OK;
}
virtual SLANG_NO_THROW Result SLANG_MCALL setCombinedTextureSampler(ShaderOffset const& offset, IResourceView* textureView, ISamplerState* sampler) override
{
m_samplers[offset] = static_cast<SamplerStateBase*>(sampler);
m_resources[offset] = static_cast<ResourceViewBase*>(textureView);
markDirty();
return SLANG_OK;
}
virtual SLANG_NO_THROW Result SLANG_MCALL getCurrentVersion(
ITransientResourceHeap* transientHeap, IShaderObject** outObject) override
{
if (!isDirty())
{
returnComPtr(outObject, getLastAllocatedShaderObject());
return SLANG_OK;
}
Slang::RefPtr<ShaderObjectBase> object =
allocateShaderObject(static_cast<TransientResourceHeapBase*>(transientHeap));
SLANG_RETURN_ON_FAIL(object->setData(ShaderOffset(), this->m_data.getBuffer(), this->m_data.getCount()));
for (auto res : m_resources)
SLANG_RETURN_ON_FAIL(object->setResource(res.Key, res.Value));
for (auto sampler : m_samplers)
SLANG_RETURN_ON_FAIL(object->setSampler(sampler.Key, sampler.Value));
for (auto offset : m_objectOffsets)
{
if (offset.bindingRangeIndex < 0)
return SLANG_E_INVALID_ARG;
auto layout = this->getLayout();
if (offset.bindingRangeIndex >= layout->getBindingRangeCount())
return SLANG_E_INVALID_ARG;
auto bindingRange = layout->getBindingRange(offset.bindingRangeIndex);
auto subObject = this->m_objects[bindingRange.subObjectIndex + offset.bindingArrayIndex];
if (subObject)
{
ComPtr<IShaderObject> subObjectVersion;
SLANG_RETURN_ON_FAIL(subObject->getCurrentVersion(transientHeap, subObjectVersion.writeRef()));
SLANG_RETURN_ON_FAIL(object->setObject(offset, subObjectVersion));
}
}
m_dirty = false;
this->m_data.m_dirty = false;
returnComPtr(outObject, object);
return SLANG_OK;
}
public:
Slang::RefPtr<ShaderObjectBase> allocateShaderObject(TransientResourceHeapBase* transientHeap)
{
auto& version = m_shaderObjectVersions.allocate(transientHeap);
if (!version.object)
{
ComPtr<IShaderObject> shaderObject;
SLANG_RETURN_NULL_ON_FAIL(this->m_device->createShaderObject(this->m_layout, shaderObject.writeRef()));
version.object = static_cast<ShaderObjectBase*>(shaderObject.get());
}
return version.object;
}
Slang::RefPtr<ShaderObjectBase> getLastAllocatedShaderObject()
{
return m_shaderObjectVersions.getLastAllocation().object;
}
};
}
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