mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
synced 2024-11-23 04:00:07 +00:00
246 lines
8.1 KiB
C++
246 lines
8.1 KiB
C++
//
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// Copyright 2013 Pixar
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//
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// Licensed under the Apache License, Version 2.0 (the "Apache License")
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// with the following modification; you may not use this file except in
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// compliance with the Apache License and the following modification to it:
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// Section 6. Trademarks. is deleted and replaced with:
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//
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// 6. Trademarks. This License does not grant permission to use the trade
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// names, trademarks, service marks, or product names of the Licensor
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// and its affiliates, except as required to comply with Section 4(c) of
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// the License and to reproduce the content of the NOTICE file.
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//
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// You may obtain a copy of the Apache License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the Apache License with the above modification is
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// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the Apache License for the specific
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// language governing permissions and limitations under the Apache License.
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//
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#include "../osd/cpuKernel.h"
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#include "../osd/bufferDescriptor.h"
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#include <cassert>
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#include <cmath>
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#include <cstdlib>
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#include <vector>
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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namespace Osd {
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template <class T> T *
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elementAtIndex(T * src, int index, BufferDescriptor const &desc) {
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return src + index * desc.stride;
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}
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static inline void
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clear(float *dst, BufferDescriptor const &desc) {
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assert(dst);
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memset(dst, 0, desc.length*sizeof(float));
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}
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static inline void
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addWithWeight(float *dst, const float *src, int srcIndex, float weight,
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BufferDescriptor const &desc) {
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assert(src && dst);
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src = elementAtIndex(src, srcIndex, desc);
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for (int k = 0; k < desc.length; ++k) {
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dst[k] += src[k] * weight;
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}
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}
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static inline void
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copy(float *dst, int dstIndex, const float *src, BufferDescriptor const &desc) {
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assert(src && dst);
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dst = elementAtIndex(dst, dstIndex, desc);
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memcpy(dst, src, desc.length*sizeof(float));
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}
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void
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CpuEvalStencils(float const * src, BufferDescriptor const &srcDesc,
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float * dst, BufferDescriptor const &dstDesc,
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int const * sizes,
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int const * offsets,
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int const * indices,
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float const * weights,
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int start, int end) {
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assert(start>=0 && start<end);
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if (start>0) {
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sizes += start;
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indices += offsets[start];
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weights += offsets[start];
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}
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src += srcDesc.offset;
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dst += dstDesc.offset;
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if (srcDesc.length == 4 && dstDesc.length == 4 &&
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srcDesc.stride == 4 && dstDesc.stride == 4) {
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// SIMD fast path for aligned primvar data (4 floats)
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ComputeStencilKernel<4>(src, dst,
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sizes, indices, weights, start, end);
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} else if (srcDesc.length == 8 && dstDesc.length == 8 &&
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srcDesc.stride == 8 && dstDesc.stride == 8) {
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// SIMD fast path for aligned primvar data (8 floats)
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ComputeStencilKernel<8>(src, dst,
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sizes, indices, weights, start, end);
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} else {
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// Slow path for non-aligned data
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float * result = (float*)alloca(srcDesc.length * sizeof(float));
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int nstencils = end-start;
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for (int i=0; i<nstencils; ++i, ++sizes) {
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clear(result, srcDesc);
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for (int j=0; j<*sizes; ++j) {
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addWithWeight(result, src, *indices++, *weights++, srcDesc);
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}
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copy(dst, i, result, dstDesc);
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}
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}
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}
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void
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CpuEvalStencils(float const * src, BufferDescriptor const &srcDesc,
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float * dst, BufferDescriptor const &dstDesc,
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float * dstDu, BufferDescriptor const &dstDuDesc,
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float * dstDv, BufferDescriptor const &dstDvDesc,
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int const * sizes,
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int const * offsets,
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int const * indices,
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float const * weights,
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float const * duWeights,
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float const * dvWeights,
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int start, int end) {
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if (start > 0) {
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sizes += start;
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indices += offsets[start];
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weights += offsets[start];
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duWeights += offsets[start];
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dvWeights += offsets[start];
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}
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src += srcDesc.offset;
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dst += dstDesc.offset;
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dstDu += dstDuDesc.offset;
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dstDv += dstDvDesc.offset;
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int nOutLength = dstDesc.length + dstDuDesc.length + dstDvDesc.length;
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float * result = (float*)alloca(nOutLength * sizeof(float));
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float * resultDu = result + dstDesc.length;
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float * resultDv = resultDu + dstDuDesc.length;
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int nStencils = end - start;
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for (int i = 0; i < nStencils; ++i, ++sizes) {
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// clear
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memset(result, 0, nOutLength * sizeof(float));
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for (int j=0; j<*sizes; ++j) {
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addWithWeight(result, src, *indices, *weights++, srcDesc);
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addWithWeight(resultDu, src, *indices, *duWeights++, srcDesc);
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addWithWeight(resultDv, src, *indices, *dvWeights++, srcDesc);
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++indices;
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}
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copy(dst, i, result, dstDesc);
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copy(dstDu, i, resultDu, dstDuDesc);
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copy(dstDv, i, resultDv, dstDvDesc);
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}
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}
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void
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CpuEvalStencils(float const * src, BufferDescriptor const &srcDesc,
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float * dst, BufferDescriptor const &dstDesc,
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float * dstDu, BufferDescriptor const &dstDuDesc,
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float * dstDv, BufferDescriptor const &dstDvDesc,
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float * dstDuu, BufferDescriptor const &dstDuuDesc,
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float * dstDuv, BufferDescriptor const &dstDuvDesc,
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float * dstDvv, BufferDescriptor const &dstDvvDesc,
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int const * sizes,
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int const * offsets,
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int const * indices,
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float const * weights,
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float const * duWeights,
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float const * dvWeights,
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float const * duuWeights,
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float const * duvWeights,
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float const * dvvWeights,
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int start, int end) {
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if (start > 0) {
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sizes += start;
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indices += offsets[start];
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weights += offsets[start];
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duWeights += offsets[start];
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dvWeights += offsets[start];
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duuWeights += offsets[start];
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duvWeights += offsets[start];
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dvvWeights += offsets[start];
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}
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src += srcDesc.offset;
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dst += dstDesc.offset;
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dstDu += dstDuDesc.offset;
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dstDv += dstDvDesc.offset;
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dstDuu += dstDuuDesc.offset;
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dstDuv += dstDuvDesc.offset;
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dstDvv += dstDvvDesc.offset;
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int nOutLength = dstDesc.length + dstDuDesc.length + dstDvDesc.length
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+ dstDuuDesc.length + dstDuvDesc.length + dstDvvDesc.length;
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float * result = (float*)alloca(nOutLength * sizeof(float));
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float * resultDu = result + dstDesc.length;
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float * resultDv = resultDu + dstDuDesc.length;
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float * resultDuu = resultDv + dstDvDesc.length;
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float * resultDuv = resultDuu + dstDuuDesc.length;
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float * resultDvv = resultDuv + dstDuvDesc.length;
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int nStencils = end - start;
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for (int i = 0; i < nStencils; ++i, ++sizes) {
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// clear
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memset(result, 0, nOutLength * sizeof(float));
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for (int j=0; j<*sizes; ++j) {
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addWithWeight(result, src, *indices, *weights++, srcDesc);
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addWithWeight(resultDu, src, *indices, *duWeights++, srcDesc);
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addWithWeight(resultDv, src, *indices, *dvWeights++, srcDesc);
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addWithWeight(resultDuu, src, *indices, *duuWeights++, srcDesc);
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addWithWeight(resultDuv, src, *indices, *duvWeights++, srcDesc);
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addWithWeight(resultDvv, src, *indices, *dvvWeights++, srcDesc);
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++indices;
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}
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copy(dst, i, result, dstDesc);
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copy(dstDu, i, resultDu, dstDuDesc);
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copy(dstDv, i, resultDv, dstDvDesc);
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copy(dstDuu, i, resultDuu, dstDuuDesc);
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copy(dstDuv, i, resultDuv, dstDuvDesc);
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copy(dstDvv, i, resultDvv, dstDvvDesc);
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}
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}
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} // end namespace Osd
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} // end namespace OPENSUBDIV_VERSION
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} // end namespace OpenSubdiv
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