mirror of
https://github.com/ncblakely/GiantsTools
synced 2024-07-03 20:11:45 +02:00
466 lines
14 KiB
C++
466 lines
14 KiB
C++
//--------------------------------------------------------------------------------------
|
|
// File: PrimitiveBatch.cpp
|
|
//
|
|
// Copyright (c) Microsoft Corporation. All rights reserved.
|
|
// Licensed under the MIT License.
|
|
//
|
|
// http://go.microsoft.com/fwlink/?LinkId=248929
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
#include "pch.h"
|
|
#include "PrimitiveBatch.h"
|
|
#include "DirectXHelpers.h"
|
|
#include "GraphicsMemory.h"
|
|
#include "PlatformHelpers.h"
|
|
|
|
using namespace DirectX;
|
|
using namespace DirectX::Internal;
|
|
using Microsoft::WRL::ComPtr;
|
|
|
|
|
|
// Internal PrimitiveBatch implementation class.
|
|
class PrimitiveBatchBase::Impl
|
|
{
|
|
public:
|
|
Impl(_In_ ID3D11DeviceContext* deviceContext, size_t maxIndices, size_t maxVertices, size_t vertexSize);
|
|
|
|
void Begin();
|
|
void End();
|
|
|
|
void Draw(D3D11_PRIMITIVE_TOPOLOGY topology, bool isIndexed, _In_opt_count_(indexCount) uint16_t const* indices, size_t indexCount, size_t vertexCount, _Out_ void** pMappedVertices);
|
|
|
|
private:
|
|
void FlushBatch();
|
|
|
|
#if defined(_XBOX_ONE) && defined(_TITLE)
|
|
ComPtr<ID3D11DeviceContextX> mDeviceContext;
|
|
#else
|
|
ComPtr<ID3D11DeviceContext> mDeviceContext;
|
|
#endif
|
|
ComPtr<ID3D11Buffer> mIndexBuffer;
|
|
ComPtr<ID3D11Buffer> mVertexBuffer;
|
|
|
|
size_t mMaxIndices;
|
|
size_t mMaxVertices;
|
|
size_t mVertexSize;
|
|
|
|
D3D11_PRIMITIVE_TOPOLOGY mCurrentTopology;
|
|
bool mInBeginEndPair;
|
|
bool mCurrentlyIndexed;
|
|
|
|
size_t mCurrentIndex;
|
|
size_t mCurrentVertex;
|
|
|
|
size_t mBaseIndex;
|
|
size_t mBaseVertex;
|
|
|
|
#if defined(_XBOX_ONE) && defined(_TITLE)
|
|
void *grfxMemoryIB;
|
|
void *grfxMemoryVB;
|
|
#else
|
|
D3D11_MAPPED_SUBRESOURCE mMappedIndices;
|
|
D3D11_MAPPED_SUBRESOURCE mMappedVertices;
|
|
#endif
|
|
};
|
|
|
|
|
|
namespace
|
|
{
|
|
// Helper for creating a D3D vertex or index buffer.
|
|
#if defined(_XBOX_ONE) && defined(_TITLE)
|
|
void CreateDynamicBuffer(_In_ ID3D11DeviceX* device, uint32_t bufferSize, D3D11_BIND_FLAG bindFlag, _Outptr_ ID3D11Buffer** pBuffer)
|
|
{
|
|
D3D11_BUFFER_DESC desc = {};
|
|
|
|
desc.ByteWidth = bufferSize;
|
|
desc.BindFlags = bindFlag;
|
|
desc.Usage = D3D11_USAGE_DEFAULT;
|
|
desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
|
|
|
|
ThrowIfFailed(
|
|
device->CreatePlacementBuffer(&desc, nullptr, pBuffer)
|
|
);
|
|
|
|
SetDebugObjectName(*pBuffer, "DirectXTK:PrimitiveBatch");
|
|
}
|
|
#else
|
|
void CreateDynamicBuffer(_In_ ID3D11Device* device, uint32_t bufferSize, D3D11_BIND_FLAG bindFlag, _Outptr_ ID3D11Buffer** pBuffer)
|
|
{
|
|
D3D11_BUFFER_DESC desc = {};
|
|
|
|
desc.ByteWidth = bufferSize;
|
|
desc.BindFlags = bindFlag;
|
|
desc.Usage = D3D11_USAGE_DYNAMIC;
|
|
desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
|
|
|
|
ThrowIfFailed(
|
|
device->CreateBuffer(&desc, nullptr, pBuffer)
|
|
);
|
|
|
|
assert(pBuffer != nullptr && *pBuffer != nullptr);
|
|
_Analysis_assume_(pBuffer != nullptr && *pBuffer != nullptr);
|
|
|
|
SetDebugObjectName(*pBuffer, "DirectXTK:PrimitiveBatch");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
// Constructor.
|
|
PrimitiveBatchBase::Impl::Impl(_In_ ID3D11DeviceContext* deviceContext, size_t maxIndices, size_t maxVertices, size_t vertexSize)
|
|
: mMaxIndices(maxIndices),
|
|
mMaxVertices(maxVertices),
|
|
mVertexSize(vertexSize),
|
|
mCurrentTopology(D3D11_PRIMITIVE_TOPOLOGY_UNDEFINED),
|
|
mInBeginEndPair(false),
|
|
mCurrentlyIndexed(false),
|
|
mCurrentIndex(0),
|
|
mCurrentVertex(0),
|
|
mBaseIndex(0),
|
|
mBaseVertex(0),
|
|
#if defined(_XBOX_ONE) && defined(_TITLE)
|
|
grfxMemoryIB(nullptr),
|
|
grfxMemoryVB(nullptr)
|
|
#else
|
|
mMappedIndices{},
|
|
mMappedVertices{}
|
|
#endif
|
|
{
|
|
ComPtr<ID3D11Device> device;
|
|
deviceContext->GetDevice(&device);
|
|
|
|
if (!maxVertices)
|
|
throw std::exception("maxVertices must be greater than 0");
|
|
|
|
if (vertexSize > D3D11_REQ_MULTI_ELEMENT_STRUCTURE_SIZE_IN_BYTES)
|
|
throw std::exception("Vertex size is too large for DirectX 11");
|
|
|
|
uint64_t ibBytes = uint64_t(maxIndices) * sizeof(uint16_t);
|
|
if (ibBytes > uint64_t(D3D11_REQ_RESOURCE_SIZE_IN_MEGABYTES_EXPRESSION_A_TERM * 1024u * 1024u)
|
|
|| ibBytes > UINT32_MAX)
|
|
throw std::exception("IB too large for DirectX 11");
|
|
|
|
uint64_t vbBytes = uint64_t(maxVertices) * uint64_t(vertexSize);
|
|
if (vbBytes > uint64_t(D3D11_REQ_RESOURCE_SIZE_IN_MEGABYTES_EXPRESSION_A_TERM * 1024u * 1024u)
|
|
|| vbBytes > UINT32_MAX)
|
|
throw std::exception("VB too large for DirectX 11");
|
|
|
|
#if defined(_XBOX_ONE) && defined(_TITLE)
|
|
ThrowIfFailed(deviceContext->QueryInterface(IID_GRAPHICS_PPV_ARGS(mDeviceContext.GetAddressOf())));
|
|
|
|
ComPtr<ID3D11DeviceX> deviceX;
|
|
ThrowIfFailed(device.As(&deviceX));
|
|
|
|
// If you only intend to draw non-indexed geometry, specify maxIndices = 0 to skip creating the index buffer.
|
|
if (maxIndices > 0)
|
|
{
|
|
CreateDynamicBuffer(deviceX.Get(), static_cast<uint32_t>(ibBytes), D3D11_BIND_INDEX_BUFFER, &mIndexBuffer);
|
|
}
|
|
|
|
// Create the vertex buffer.
|
|
CreateDynamicBuffer(deviceX.Get(), static_cast<uint32_t>(vbBytes), D3D11_BIND_VERTEX_BUFFER, &mVertexBuffer);
|
|
|
|
grfxMemoryIB = grfxMemoryVB = nullptr;
|
|
#else
|
|
mDeviceContext = deviceContext;
|
|
|
|
// If you only intend to draw non-indexed geometry, specify maxIndices = 0 to skip creating the index buffer.
|
|
if (maxIndices > 0)
|
|
{
|
|
CreateDynamicBuffer(device.Get(), static_cast<uint32_t>(ibBytes), D3D11_BIND_INDEX_BUFFER, &mIndexBuffer);
|
|
}
|
|
|
|
// Create the vertex buffer.
|
|
CreateDynamicBuffer(device.Get(), static_cast<uint32_t>(vbBytes), D3D11_BIND_VERTEX_BUFFER, &mVertexBuffer);
|
|
#endif
|
|
}
|
|
|
|
|
|
// Begins a batch of primitive drawing operations.
|
|
void PrimitiveBatchBase::Impl::Begin()
|
|
{
|
|
if (mInBeginEndPair)
|
|
throw std::exception("Cannot nest Begin calls");
|
|
|
|
#if defined(_XBOX_ONE) && defined(_TITLE)
|
|
mDeviceContext->IASetIndexBuffer(nullptr, DXGI_FORMAT_UNKNOWN, 0);
|
|
#else
|
|
// Bind the index buffer.
|
|
if (mMaxIndices > 0)
|
|
{
|
|
mDeviceContext->IASetIndexBuffer(mIndexBuffer.Get(), DXGI_FORMAT_R16_UINT, 0);
|
|
}
|
|
|
|
// Bind the vertex buffer.
|
|
auto vertexBuffer = mVertexBuffer.Get();
|
|
UINT vertexStride = static_cast<UINT>(mVertexSize);
|
|
UINT vertexOffset = 0;
|
|
|
|
mDeviceContext->IASetVertexBuffers(0, 1, &vertexBuffer, &vertexStride, &vertexOffset);
|
|
#endif
|
|
|
|
// If this is a deferred D3D context, reset position so the first Map calls will use D3D11_MAP_WRITE_DISCARD.
|
|
if (mDeviceContext->GetType() == D3D11_DEVICE_CONTEXT_DEFERRED)
|
|
{
|
|
mCurrentIndex = 0;
|
|
mCurrentVertex = 0;
|
|
}
|
|
|
|
mInBeginEndPair = true;
|
|
}
|
|
|
|
|
|
// Ends a batch of primitive drawing operations.
|
|
void PrimitiveBatchBase::Impl::End()
|
|
{
|
|
if (!mInBeginEndPair)
|
|
throw std::exception("Begin must be called before End");
|
|
|
|
FlushBatch();
|
|
|
|
mInBeginEndPair = false;
|
|
}
|
|
|
|
|
|
namespace
|
|
{
|
|
// Can we combine adjacent primitives using this topology into a single draw call?
|
|
bool CanBatchPrimitives(D3D11_PRIMITIVE_TOPOLOGY topology) noexcept
|
|
{
|
|
switch (topology)
|
|
{
|
|
case D3D11_PRIMITIVE_TOPOLOGY_POINTLIST:
|
|
case D3D11_PRIMITIVE_TOPOLOGY_LINELIST:
|
|
case D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST:
|
|
// Lists can easily be merged.
|
|
return true;
|
|
|
|
default:
|
|
// Strips cannot.
|
|
return false;
|
|
}
|
|
|
|
// We could also merge indexed strips by inserting degenerates,
|
|
// but that's not always a perf win, so let's keep things simple.
|
|
}
|
|
|
|
|
|
#if !defined(_XBOX_ONE) || !defined(_TITLE)
|
|
// Helper for locking a vertex or index buffer.
|
|
void LockBuffer(_In_ ID3D11DeviceContext* deviceContext, _In_ ID3D11Buffer* buffer, size_t currentPosition, _Out_ size_t* basePosition, _Out_ D3D11_MAPPED_SUBRESOURCE* mappedResource)
|
|
{
|
|
D3D11_MAP mapType = (currentPosition == 0) ? D3D11_MAP_WRITE_DISCARD : D3D11_MAP_WRITE_NO_OVERWRITE;
|
|
|
|
ThrowIfFailed(
|
|
deviceContext->Map(buffer, 0, mapType, 0, mappedResource)
|
|
);
|
|
|
|
*basePosition = currentPosition;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
// Adds new geometry to the batch.
|
|
_Use_decl_annotations_
|
|
void PrimitiveBatchBase::Impl::Draw(D3D11_PRIMITIVE_TOPOLOGY topology, bool isIndexed, uint16_t const* indices, size_t indexCount, size_t vertexCount, void** pMappedVertices)
|
|
{
|
|
if (isIndexed && !indices)
|
|
throw std::exception("Indices cannot be null");
|
|
|
|
if (indexCount >= mMaxIndices)
|
|
throw std::exception("Too many indices");
|
|
|
|
if (vertexCount >= mMaxVertices)
|
|
throw std::exception("Too many vertices");
|
|
|
|
if (!mInBeginEndPair)
|
|
throw std::exception("Begin must be called before Draw");
|
|
|
|
// Can we merge this primitive in with an existing batch, or must we flush first?
|
|
bool wrapIndexBuffer = (mCurrentIndex + indexCount > mMaxIndices);
|
|
bool wrapVertexBuffer = (mCurrentVertex + vertexCount > mMaxVertices);
|
|
|
|
if ((topology != mCurrentTopology) ||
|
|
(isIndexed != mCurrentlyIndexed) ||
|
|
!CanBatchPrimitives(topology) ||
|
|
wrapIndexBuffer || wrapVertexBuffer)
|
|
{
|
|
FlushBatch();
|
|
}
|
|
|
|
#if defined(_XBOX_ONE) && defined(_TITLE)
|
|
if (mCurrentTopology == D3D11_PRIMITIVE_TOPOLOGY_UNDEFINED)
|
|
{
|
|
auto& grfxMem = GraphicsMemory::Get();
|
|
|
|
if (isIndexed)
|
|
{
|
|
grfxMemoryIB = grfxMem.Allocate(mDeviceContext.Get(), mMaxIndices * sizeof(uint16_t), 64);
|
|
}
|
|
|
|
grfxMemoryVB = grfxMem.Allocate(mDeviceContext.Get(), mMaxVertices * mVertexSize, 64);
|
|
|
|
mCurrentTopology = topology;
|
|
mCurrentlyIndexed = isIndexed;
|
|
mCurrentIndex = mCurrentVertex = 0;
|
|
}
|
|
|
|
// Copy over the index data.
|
|
if (isIndexed)
|
|
{
|
|
assert(grfxMemoryIB != nullptr);
|
|
auto outputIndices = reinterpret_cast<uint16_t*>(grfxMemoryIB) + mCurrentIndex;
|
|
|
|
for (size_t i = 0; i < indexCount; i++)
|
|
{
|
|
outputIndices[i] = (uint16_t)(indices[i] + mCurrentVertex);
|
|
}
|
|
|
|
mCurrentIndex += indexCount;
|
|
}
|
|
|
|
// Return the output vertex data location.
|
|
assert(grfxMemoryVB != nullptr);
|
|
*pMappedVertices = reinterpret_cast<uint8_t*>(grfxMemoryVB) + (mCurrentVertex * mVertexSize);
|
|
|
|
mCurrentVertex += vertexCount;
|
|
#else
|
|
if (wrapIndexBuffer)
|
|
mCurrentIndex = 0;
|
|
|
|
if (wrapVertexBuffer)
|
|
mCurrentVertex = 0;
|
|
|
|
// If we are not already in a batch, lock the buffers.
|
|
if (mCurrentTopology == D3D11_PRIMITIVE_TOPOLOGY_UNDEFINED)
|
|
{
|
|
if (isIndexed)
|
|
{
|
|
LockBuffer(mDeviceContext.Get(), mIndexBuffer.Get(), mCurrentIndex, &mBaseIndex, &mMappedIndices);
|
|
}
|
|
|
|
LockBuffer(mDeviceContext.Get(), mVertexBuffer.Get(), mCurrentVertex, &mBaseVertex, &mMappedVertices);
|
|
|
|
mCurrentTopology = topology;
|
|
mCurrentlyIndexed = isIndexed;
|
|
}
|
|
|
|
// Copy over the index data.
|
|
if (isIndexed)
|
|
{
|
|
auto outputIndices = static_cast<uint16_t*>(mMappedIndices.pData) + mCurrentIndex;
|
|
|
|
for (size_t i = 0; i < indexCount; i++)
|
|
{
|
|
outputIndices[i] = static_cast<uint16_t>(indices[i] + mCurrentVertex - mBaseVertex);
|
|
}
|
|
|
|
mCurrentIndex += indexCount;
|
|
}
|
|
|
|
// Return the output vertex data location.
|
|
*pMappedVertices = static_cast<uint8_t*>(mMappedVertices.pData) + (mCurrentVertex * mVertexSize);
|
|
|
|
mCurrentVertex += vertexCount;
|
|
#endif
|
|
}
|
|
|
|
|
|
// Sends queued primitives to the graphics device.
|
|
void PrimitiveBatchBase::Impl::FlushBatch()
|
|
{
|
|
// Early out if there is nothing to flush.
|
|
if (mCurrentTopology == D3D11_PRIMITIVE_TOPOLOGY_UNDEFINED)
|
|
return;
|
|
|
|
mDeviceContext->IASetPrimitiveTopology(mCurrentTopology);
|
|
|
|
#if defined(_XBOX_ONE) && defined(_TITLE)
|
|
if (mCurrentlyIndexed)
|
|
{
|
|
// Draw indexed geometry.
|
|
mDeviceContext->IASetPlacementIndexBuffer(mIndexBuffer.Get(), grfxMemoryIB, DXGI_FORMAT_R16_UINT);
|
|
mDeviceContext->IASetPlacementVertexBuffer(0, mVertexBuffer.Get(), grfxMemoryVB, (UINT)mVertexSize);
|
|
|
|
mDeviceContext->DrawIndexed((UINT)mCurrentIndex, 0, 0);
|
|
}
|
|
else
|
|
{
|
|
// Draw non-indexed geometry.
|
|
mDeviceContext->IASetPlacementVertexBuffer(0, mVertexBuffer.Get(), grfxMemoryVB, (UINT)mVertexSize);
|
|
|
|
mDeviceContext->Draw((UINT)mCurrentVertex, 0);
|
|
}
|
|
|
|
grfxMemoryIB = grfxMemoryVB = nullptr;
|
|
#else
|
|
mDeviceContext->Unmap(mVertexBuffer.Get(), 0);
|
|
|
|
if (mCurrentlyIndexed)
|
|
{
|
|
// Draw indexed geometry.
|
|
mDeviceContext->Unmap(mIndexBuffer.Get(), 0);
|
|
|
|
mDeviceContext->DrawIndexed(
|
|
static_cast<UINT>(mCurrentIndex - mBaseIndex),
|
|
static_cast<UINT>(mBaseIndex),
|
|
static_cast<INT>(mBaseVertex));
|
|
}
|
|
else
|
|
{
|
|
// Draw non-indexed geometry.
|
|
mDeviceContext->Draw(static_cast<UINT>(mCurrentVertex - mBaseVertex), static_cast<UINT>(mBaseVertex));
|
|
}
|
|
#endif
|
|
|
|
mCurrentTopology = D3D11_PRIMITIVE_TOPOLOGY_UNDEFINED;
|
|
}
|
|
|
|
|
|
// Public constructor.
|
|
PrimitiveBatchBase::PrimitiveBatchBase(_In_ ID3D11DeviceContext* deviceContext, size_t maxIndices, size_t maxVertices, size_t vertexSize)
|
|
: pImpl(std::make_unique<Impl>(deviceContext, maxIndices, maxVertices, vertexSize))
|
|
{
|
|
}
|
|
|
|
|
|
// Move constructor.
|
|
PrimitiveBatchBase::PrimitiveBatchBase(PrimitiveBatchBase&& moveFrom) noexcept
|
|
: pImpl(std::move(moveFrom.pImpl))
|
|
{
|
|
}
|
|
|
|
|
|
// Move assignment.
|
|
PrimitiveBatchBase& PrimitiveBatchBase::operator= (PrimitiveBatchBase&& moveFrom) noexcept
|
|
{
|
|
pImpl = std::move(moveFrom.pImpl);
|
|
return *this;
|
|
}
|
|
|
|
|
|
// Public destructor.
|
|
PrimitiveBatchBase::~PrimitiveBatchBase()
|
|
{
|
|
}
|
|
|
|
|
|
void PrimitiveBatchBase::Begin()
|
|
{
|
|
pImpl->Begin();
|
|
}
|
|
|
|
|
|
void PrimitiveBatchBase::End()
|
|
{
|
|
pImpl->End();
|
|
}
|
|
|
|
|
|
_Use_decl_annotations_
|
|
void PrimitiveBatchBase::Draw(D3D11_PRIMITIVE_TOPOLOGY topology, bool isIndexed, uint16_t const* indices, size_t indexCount, size_t vertexCount, void** pMappedVertices)
|
|
{
|
|
pImpl->Draw(topology, isIndexed, indices, indexCount, vertexCount, pMappedVertices);
|
|
}
|