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/****************************************************************************
* Copyright (C) 2014-2019 without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* @file tessellator.h
*
* @brief Tessellator fixed function unit interface definition
*
******************************************************************************/
#pragma once
#include "tessellator.hpp"
struct SWR_TS_TESSELLATED_DATA
{
uint32_t NumPrimitives;
uint32_t NumDomainPoints;
uint32_t* ppIndices[3];
float* pDomainPointsU;
float* pDomainPointsV;
// For Tri: pDomainPointsW[i] = 1.0f - pDomainPointsU[i] - pDomainPointsV[i]
};
namespace Tessellator
{
/// Wrapper class for the CHWTessellator reference tessellator from MSFT
/// This class will store data not originally stored in CHWTessellator
class SWR_TS : private CHWTessellator
{
private:
typedef CHWTessellator SUPER;
SWR_TS_DOMAIN Domain;
OSALIGNSIMD(float) DomainPointsU[MAX_POINT_COUNT];
OSALIGNSIMD(float) DomainPointsV[MAX_POINT_COUNT];
uint32_t NumDomainPoints;
OSALIGNSIMD(uint32_t) Indices[3][MAX_INDEX_COUNT / 3];
uint32_t NumIndices;
public:
void Init(SWR_TS_DOMAIN tsDomain,
SWR_TS_PARTITIONING tsPartitioning,
SWR_TS_OUTPUT_TOPOLOGY tsOutputTopology)
{
static D3D11_TESSELLATOR_PARTITIONING CVT_TS_D3D_PARTITIONING[] = {
D3D11_TESSELLATOR_PARTITIONING_INTEGER, // SWR_TS_INTEGER
D3D11_TESSELLATOR_PARTITIONING_FRACTIONAL_ODD, // SWR_TS_ODD_FRACTIONAL
D3D11_TESSELLATOR_PARTITIONING_FRACTIONAL_EVEN, // SWR_TS_EVEN_FRACTIONAL
D3D11_TESSELLATOR_PARTITIONING_POW2 // SWR_TS_POW2
};
static D3D11_TESSELLATOR_OUTPUT_PRIMITIVE CVT_TS_D3D_OUTPUT_TOPOLOGY[] = {
D3D11_TESSELLATOR_OUTPUT_POINT, // SWR_TS_OUTPUT_POINT
D3D11_TESSELLATOR_OUTPUT_LINE, // SWR_TS_OUTPUT_LINE
D3D11_TESSELLATOR_OUTPUT_TRIANGLE_CCW, // SWR_TS_OUTPUT_TRI_CW - inverted logic, because DX
D3D11_TESSELLATOR_OUTPUT_TRIANGLE_CW // SWR_TS_OUTPUT_TRI_CCW - inverted logic, because DX
};
SUPER::Init(CVT_TS_D3D_PARTITIONING[tsPartitioning],
CVT_TS_D3D_OUTPUT_TOPOLOGY[tsOutputTopology]);
Domain = tsDomain;
NumDomainPoints = 0;
NumIndices = 0;
}
void Tessellate(const SWR_TESSELLATION_FACTORS& tsTessFactors,
SWR_TS_TESSELLATED_DATA& tsTessellatedData)
{
uint32_t IndexDiv = 0;
switch (Domain)
{
case SWR_TS_QUAD:
IndexDiv = 3;
SUPER::TessellateQuadDomain(
tsTessFactors.OuterTessFactors[SWR_QUAD_U_EQ0_TRI_U_LINE_DETAIL],
tsTessFactors.OuterTessFactors[SWR_QUAD_V_EQ0_TRI_W],
tsTessFactors.OuterTessFactors[SWR_QUAD_U_EQ1_TRI_V_LINE_DENSITY],
tsTessFactors.OuterTessFactors[SWR_QUAD_V_EQ1],
tsTessFactors.InnerTessFactors[SWR_QUAD_U_TRI_INSIDE],
tsTessFactors.InnerTessFactors[SWR_QUAD_V_INSIDE]);
break;
case SWR_TS_TRI:
IndexDiv = 3;
SUPER::TessellateTriDomain(
tsTessFactors.OuterTessFactors[SWR_QUAD_U_EQ0_TRI_U_LINE_DETAIL],
tsTessFactors.OuterTessFactors[SWR_QUAD_U_EQ1_TRI_V_LINE_DENSITY],
tsTessFactors.OuterTessFactors[SWR_QUAD_V_EQ0_TRI_W],
tsTessFactors.InnerTessFactors[SWR_QUAD_U_TRI_INSIDE]);
break;
case SWR_TS_ISOLINE:
IndexDiv = 2;
SUPER::TessellateIsoLineDomain(
tsTessFactors.OuterTessFactors[SWR_QUAD_U_EQ1_TRI_V_LINE_DENSITY],
tsTessFactors.OuterTessFactors[SWR_QUAD_U_EQ0_TRI_U_LINE_DETAIL]);
break;
default:
SWR_INVALID("Invalid Tessellation Domain: %d", Domain);
assert(false);
}
NumDomainPoints = (uint32_t)SUPER::GetPointCount();
DOMAIN_POINT* pPoints = SUPER::GetPoints();
for (uint32_t i = 0; i < NumDomainPoints; i++) {
DomainPointsU[i] = pPoints[i].u;
DomainPointsV[i] = pPoints[i].v;
}
tsTessellatedData.NumDomainPoints = NumDomainPoints;
tsTessellatedData.pDomainPointsU = &DomainPointsU[0];
tsTessellatedData.pDomainPointsV = &DomainPointsV[0];
NumIndices = (uint32_t)SUPER::GetIndexCount();
assert(NumIndices % IndexDiv == 0);
tsTessellatedData.NumPrimitives = NumIndices / IndexDiv;
uint32_t* pIndices = (uint32_t*)SUPER::GetIndices();
for (uint32_t i = 0; i < NumIndices; i++) {
Indices[i % IndexDiv][i / IndexDiv] = pIndices[i];
}
tsTessellatedData.ppIndices[0] = &Indices[0][0];
tsTessellatedData.ppIndices[1] = &Indices[1][0];
tsTessellatedData.ppIndices[2] = &Indices[2][0];
}
};
} // namespace Tessellator
/// Allocate and initialize a new tessellation context
INLINE HANDLE SWR_API
TSInitCtx(SWR_TS_DOMAIN tsDomain, ///< [IN] Tessellation domain (isoline, quad, triangle)
SWR_TS_PARTITIONING tsPartitioning, ///< [IN] Tessellation partitioning algorithm
SWR_TS_OUTPUT_TOPOLOGY tsOutputTopology, ///< [IN] Tessellation output topology
void* pContextMem, ///< [IN] Memory to use for the context
size_t& memSize) ///< [INOUT] In: Amount of memory in pContextMem. Out: Mem required
{
using Tessellator::SWR_TS;
SWR_ASSERT(tsDomain < SWR_TS_DOMAIN_COUNT);
SWR_ASSERT(tsPartitioning < SWR_TS_PARTITIONING_COUNT);
SWR_ASSERT(tsOutputTopology < SWR_TS_OUTPUT_TOPOLOGY_COUNT);
size_t origMemSize = memSize;
memSize = AlignUp(sizeof(SWR_TS), 64);
if (nullptr == pContextMem || memSize > origMemSize)
{
return nullptr;
}
HANDLE tsCtx = pContextMem;
SWR_TS* pTessellator = new (tsCtx) SWR_TS();
SWR_ASSERT(pTessellator == tsCtx);
pTessellator->Init(tsDomain, tsPartitioning, tsOutputTopology);
return tsCtx;
}
/// Destroy & de-allocate tessellation context
INLINE void SWR_API TSDestroyCtx(HANDLE tsCtx) ///< [IN] Tessellation context to be destroyed
{
using Tessellator::SWR_TS;
SWR_TS* pTessellator = (SWR_TS*)tsCtx;
if (pTessellator)
{
pTessellator->~SWR_TS();
}
}
/// Perform Tessellation
INLINE void SWR_API
TSTessellate(HANDLE tsCtx, ///< [IN] Tessellation Context
const SWR_TESSELLATION_FACTORS& tsTessFactors, ///< [IN] Tessellation Factors
SWR_TS_TESSELLATED_DATA& tsTessellatedData) ///< [OUT] Tessellated Data
{
using Tessellator::SWR_TS;
SWR_TS* pTessellator = (SWR_TS*)tsCtx;
SWR_ASSERT(pTessellator);
pTessellator->Tessellate(tsTessFactors, tsTessellatedData);
}
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