OpenSubdiv/opensubdiv/osd/ompEvalStencilsController.cpp

156 lines
4.6 KiB
C++

//
// Copyright 2013 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
// names, trademarks, service marks, or product names of the Licensor
// and its affiliates, except as required to comply with Section 4(c) of
// the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
#include "../osd/ompEvalStencilsController.h"
#include <cassert>
namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {
namespace Osd {
OmpEvalStencilsController::OmpEvalStencilsController(int numThreads) {
_numThreads = (numThreads == -1) ? omp_get_num_procs() : numThreads;
}
OmpEvalStencilsController::~OmpEvalStencilsController() {
}
int
OmpEvalStencilsController::_UpdateValues( CpuEvalStencilsContext * context ) {
int result=0;
Far::LimitStencilTables const * stencils = context->GetStencilTables();
int nstencils = stencils->GetNumStencils();
if (not nstencils)
return result;
VertexBufferDescriptor ctrlDesc = _currentBindState.controlDataDesc,
outDesc = _currentBindState.outputDataDesc;
// make sure that we have control data to work with
if (not ctrlDesc.CanEval(outDesc))
return 0;
float const * ctrl = _currentBindState.controlData + ctrlDesc.offset;
if (not ctrl)
return result;
#pragma omp parallel for
for (int i=0; i<nstencils; ++i) {
int size = stencils->GetSizes()[i];
Far::Index offset = stencils->GetOffsets()[i];
Far::Index const * index = &stencils->GetControlIndices().at(offset);
float const * weight = &stencils->GetWeights().at(offset);
float * out = _currentBindState.outputData + i * outDesc.stride + outDesc.offset;
memset(out, 0, outDesc.length*sizeof(float));
for (int j=0; j<size; ++j, ++index, ++weight) {
float const * cv = ctrl + (*index)*ctrlDesc.stride;
for (int k=0; k<outDesc.length; ++k) {
out[k] += cv[k] * (*weight);
}
}
}
return nstencils;
}
int
OmpEvalStencilsController::_UpdateDerivs( CpuEvalStencilsContext * context ) {
int result=0;
Far::LimitStencilTables const * stencils = context->GetStencilTables();
int nstencils = stencils->GetNumStencils();
if (not nstencils)
return result;
VertexBufferDescriptor ctrlDesc = _currentBindState.controlDataDesc,
duDesc = _currentBindState.outputDuDesc,
dvDesc = _currentBindState.outputDvDesc;
// make sure that we have control data to work with
if (not (ctrlDesc.CanEval(duDesc) and ctrlDesc.CanEval(dvDesc)))
return 0;
float const * ctrl = _currentBindState.controlData + ctrlDesc.offset;
if (not ctrl)
return result;
#pragma omp parallel for
for (int i=0; i<nstencils; ++i) {
int size = stencils->GetSizes()[i];
Far::Index offset = stencils->GetOffsets()[i];
Far::Index const * index = &stencils->GetControlIndices().at(offset);
float const * duweight = &stencils->GetDuWeights().at(offset),
* dvweight = &stencils->GetDvWeights().at(offset);
float * du = _currentBindState.outputUDeriv + i * duDesc.stride + duDesc.offset,
* dv = _currentBindState.outputVDeriv + i * dvDesc.stride + dvDesc.offset;
memset(du, 0, duDesc.length*sizeof(float));
memset(dv, 0, dvDesc.length*sizeof(float));
for (int j=0; j<size; ++j, ++index, ++duweight, ++dvweight) {
float const * cv = ctrl + (*index)*ctrlDesc.stride;
for (int k=0; k<duDesc.length; ++k) {
du[k] += cv[k] * (*duweight);
dv[k] += cv[k] * (*dvweight);
}
}
}
return nstencils;
}
void
OmpEvalStencilsController::Synchronize() {
}
} // end namespace Osd
} // end namespace OPENSUBDIV_VERSION
} // end namespace OpenSubdiv