OpenSubdiv/opensubdiv/osd/cpuEvalLimitContext.cpp

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#include "../osd/cpuEvalLimitContext.h"
#include "../osd/vertexDescriptor.h"

#include <string.h>
#include <cassert>
#include <cstdio>
#include <cmath>

namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {

OsdCpuEvalLimitContext *
OsdCpuEvalLimitContext::Create(FarMesh<OsdVertex> const * farmesh) {

    assert(farmesh);
    
    // we do not support uniform yet
    if (not farmesh->GetPatchTables())
        return NULL;
                                          
    return new OsdCpuEvalLimitContext(farmesh);
}

OsdCpuEvalLimitContext::OsdCpuEvalLimitContext(FarMesh<OsdVertex> const * farmesh) :
    OsdEvalLimitContext(farmesh) {
    
    FarPatchTables const * patchTables = farmesh->GetPatchTables();
    assert(patchTables);

    // copy the data from the FarTables
    _patches = patchTables->GetPatchTable();

    _patchArrays = patchTables->GetPatchArrayVector();
    
    _vertexValenceBuffer = patchTables->GetVertexValenceTable();
    
    _quadOffsetBuffer = patchTables->GetQuadOffsetTable();
    
    // Copy the bitfields, the faceId will be the key to our map
    int npatches = patchTables->GetNumPatches();
    
    _patchBitFields.reserve(npatches);

     FarPatchTables::PatchParamTable const & ptxTable =
         patchTables->GetPatchParamTable();

     if ( not ptxTable.empty() ) {

        FarPatchParam const * pptr = &ptxTable[0];

        for (int arrayId = 0; arrayId < (int)_patchArrays.size(); ++arrayId) {

            FarPatchTables::PatchArray const & pa = _patchArrays[arrayId];

            for (unsigned int j=0; j < pa.GetNumPatches(); ++j) {
                _patchBitFields.push_back( pptr++->bitField );
            }
        }
    }
    

    _patchMap = new FarPatchTables::PatchMap( *patchTables );
}

OsdCpuEvalLimitContext::~OsdCpuEvalLimitContext() {
    delete _patchMap;
}

} // end namespace OPENSUBDIV_VERSION
} // end namespace OpenSubdiv