mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
synced 2024-11-23 12:10:08 +00:00
ee061291b7
All kernels take offset/length/stride to apply subdivision partially in each vertex elements. Also the offset can be used for client-based VBO aggregation, without modifying index buffers. This is useful for topology sharing, in conjunction with glDrawElementsBaseVertex etc. However, gregory patch shader fetches vertex buffer via texture buffer, which index should also be offsetted too. Although gl_BaseVertexARB extension should be able to do that job, it's a relatively new extension. So we use OsdBaseVertex() call to mitigate the compatibility issue as clients can provide it in their way at least for the time being.
416 lines
15 KiB
C++
416 lines
15 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/ompKernel.h"
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#include "../osd/vertexDescriptor.h"
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#include <algorithm>
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#include <cmath>
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#include <cstdlib>
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#include <omp.h>
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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static inline void
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clear(float *dst, OsdVertexBufferDescriptor const &desc) {
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if (dst) {
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memset(dst, 0, desc.length*sizeof(float));
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}
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}
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static inline void
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addWithWeight(float *dst, const float *srcOrigin, int srcIndex, float weight,
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OsdVertexBufferDescriptor const &desc) {
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if (srcOrigin && dst) {
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const float *src = srcOrigin + srcIndex * desc.stride;
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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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}
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static inline void
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copy(float *dstOrigin, const float *src, int dstIndex,
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OsdVertexBufferDescriptor const &desc) {
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if (dstOrigin && src) {
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float *dst = dstOrigin + dstIndex * desc.stride;
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memcpy(dst, src, desc.length*sizeof(float));
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}
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}
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void OsdOmpComputeFace(
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float * vertex, float * varying,
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OsdVertexBufferDescriptor const &vertexDesc,
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OsdVertexBufferDescriptor const &varyingDesc,
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const int *F_IT, const int *F_ITa, int offset, int tableOffset, int start, int end) {
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int numThreads = omp_get_max_threads();
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float *vertexResultsArray = (float*)alloca(vertexDesc.length * sizeof(float) * numThreads);
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float *varyingResultsArray = (float*)alloca(varyingDesc.length * sizeof(float) * numThreads);
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#pragma omp parallel for
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for (int i = start + tableOffset; i < end + tableOffset; i++) {
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int h = F_ITa[2*i];
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int n = F_ITa[2*i+1];
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float weight = 1.0f/n;
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int dstIndex = offset + i - tableOffset;
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int threadId = omp_get_thread_num();
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float *vertexResults = vertexResultsArray +
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vertexDesc.length * threadId;
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float *varyingResults = varyingResultsArray +
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varyingDesc.length * threadId;
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// clear
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clear(vertexResults, vertexDesc);
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clear(varyingResults, varyingDesc);
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for (int j = 0; j < n; ++j) {
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int index = F_IT[h+j];
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addWithWeight(vertexResults, vertex, index, weight, vertexDesc);
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addWithWeight(varyingResults, varying, index, weight, varyingDesc);
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}
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// write results
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copy(vertex, vertexResults, dstIndex, vertexDesc);
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copy(varying, varyingResults, dstIndex, varyingDesc);
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}
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}
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void OsdOmpComputeEdge(
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float * vertex, float * varying,
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OsdVertexBufferDescriptor const &vertexDesc,
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OsdVertexBufferDescriptor const &varyingDesc,
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const int *E_IT, const float *E_W, int offset, int tableOffset, int start, int end) {
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int numThreads = omp_get_max_threads();
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float *vertexResultsArray = (float*)alloca(vertexDesc.length * sizeof(float) * numThreads);
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float *varyingResultsArray = (float*)alloca(varyingDesc.length * sizeof(float) * numThreads);
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#pragma omp parallel for
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for (int i = start + tableOffset; i < end + tableOffset; i++) {
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int eidx0 = E_IT[4*i+0];
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int eidx1 = E_IT[4*i+1];
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int eidx2 = E_IT[4*i+2];
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int eidx3 = E_IT[4*i+3];
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float vertWeight = E_W[i*2+0];
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int dstIndex = offset + i - tableOffset;
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int threadId = omp_get_thread_num();
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float *vertexResults = vertexResultsArray +
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vertexDesc.length * threadId;
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float *varyingResults = varyingResultsArray +
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varyingDesc.length * threadId;
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// clear
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clear(vertexResults, vertexDesc);
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clear(varyingResults, varyingDesc);
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addWithWeight(vertexResults, vertex, eidx0, vertWeight, vertexDesc);
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addWithWeight(vertexResults, vertex, eidx1, vertWeight, vertexDesc);
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if (eidx2 != -1) {
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float faceWeight = E_W[i*2+1];
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addWithWeight(vertexResults, vertex, eidx2, faceWeight, vertexDesc);
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addWithWeight(vertexResults, vertex, eidx3, faceWeight, vertexDesc);
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}
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addWithWeight(varyingResults, varying, eidx0, 0.5f, varyingDesc);
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addWithWeight(varyingResults, varying, eidx1, 0.5f, varyingDesc);
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copy(vertex, vertexResults, dstIndex, vertexDesc);
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copy(varying, varyingResults, dstIndex, varyingDesc);
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}
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}
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void OsdOmpComputeVertexA(
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float * vertex, float * varying,
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OsdVertexBufferDescriptor const &vertexDesc,
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OsdVertexBufferDescriptor const &varyingDesc,
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const int *V_ITa, const float *V_W,
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int offset, int tableOffset, int start, int end, int pass) {
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int numThreads = omp_get_max_threads();
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float *vertexResultsArray = (float*)alloca(vertexDesc.length * sizeof(float) * numThreads);
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float *varyingResultsArray = (float*)alloca(varyingDesc.length * sizeof(float) * numThreads);
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#pragma omp parallel for
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for (int i = start + tableOffset; i < end + tableOffset; i++) {
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int n = V_ITa[5*i+1];
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int p = V_ITa[5*i+2];
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int eidx0 = V_ITa[5*i+3];
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int eidx1 = V_ITa[5*i+4];
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float weight = (pass == 1) ? V_W[i] : 1.0f - V_W[i];
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// In the case of fractional weight, the weight must be inverted since
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// the value is shared with the k_Smooth kernel (statistically the
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// k_Smooth kernel runs much more often than this one)
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if (weight > 0.0f && weight < 1.0f && n > 0)
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weight = 1.0f - weight;
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int dstIndex = offset + i - tableOffset;
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int threadId = omp_get_thread_num();
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float *vertexResults = vertexResultsArray +
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vertexDesc.length * threadId;
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float *varyingResults = varyingResultsArray +
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varyingDesc.length * threadId;
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clear(vertexResults, vertexDesc);
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clear(varyingResults, varyingDesc);
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if (pass) {
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// copy previous results
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addWithWeight(vertexResults, vertex, dstIndex, 1.0f, vertexDesc);
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}
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if (eidx0 == -1 || (pass == 0 && (n == -1))) {
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addWithWeight(vertexResults, vertex, p, weight, vertexDesc);
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} else {
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addWithWeight(vertexResults, vertex, p, weight * 0.75f, vertexDesc);
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addWithWeight(vertexResults, vertex, eidx0, weight * 0.125f, vertexDesc);
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addWithWeight(vertexResults, vertex, eidx1, weight * 0.125f, vertexDesc);
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}
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copy(vertex, vertexResults, dstIndex, vertexDesc);
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if (not pass) {
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addWithWeight(varyingResults, varying, p, 1.0f, varyingDesc);
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copy(varying, varyingResults, dstIndex, varyingDesc);
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}
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}
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}
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void OsdOmpComputeVertexB(
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float * vertex, float * varying,
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OsdVertexBufferDescriptor const &vertexDesc,
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OsdVertexBufferDescriptor const &varyingDesc,
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const int *V_ITa, const int *V_IT, const float *V_W,
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int offset, int tableOffset, int start, int end) {
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int numThreads = omp_get_max_threads();
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float *vertexResultsArray = (float*)alloca(vertexDesc.length * sizeof(float) * numThreads);
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float *varyingResultsArray = (float*)alloca(varyingDesc.length * sizeof(float) * numThreads);
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#pragma omp parallel for
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for (int i = start + tableOffset; i < end + tableOffset; i++) {
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int h = V_ITa[5*i];
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int n = V_ITa[5*i+1];
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int p = V_ITa[5*i+2];
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float weight = V_W[i];
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float wp = 1.0f/static_cast<float>(n*n);
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float wv = (n-2.0f) * n * wp;
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int dstIndex = offset + i - tableOffset;
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int threadId = omp_get_thread_num();
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float *vertexResults = vertexResultsArray +
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vertexDesc.length * threadId;
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float *varyingResults = varyingResultsArray +
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varyingDesc.length * threadId;
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clear(vertexResults, vertexDesc);
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clear(varyingResults, varyingDesc);
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addWithWeight(vertexResults, vertex, p, weight * wv, vertexDesc);
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for (int j = 0; j < n; ++j) {
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addWithWeight(vertexResults, vertex, V_IT[h+j*2], weight * wp, vertexDesc);
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addWithWeight(vertexResults, vertex, V_IT[h+j*2+1], weight * wp, vertexDesc);
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}
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addWithWeight(varyingResults, varying, p, 1.0f, varyingDesc);
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copy(vertex, vertexResults, dstIndex, vertexDesc);
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copy(varying, varyingResults, dstIndex, varyingDesc);
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}
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}
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void OsdOmpComputeLoopVertexB(
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float * vertex, float * varying,
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OsdVertexBufferDescriptor const &vertexDesc,
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OsdVertexBufferDescriptor const &varyingDesc,
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const int *V_ITa, const int *V_IT, const float *V_W,
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int vertexOffset, int tableOffset, int start, int end) {
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int numThreads = omp_get_max_threads();
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float *vertexResultsArray = (float*)alloca(vertexDesc.length * sizeof(float) * numThreads);
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float *varyingResultsArray = (float*)alloca(varyingDesc.length * sizeof(float) * numThreads);
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#pragma omp parallel for
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for (int i = start + tableOffset; i < end + tableOffset; i++) {
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int h = V_ITa[5*i];
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int n = V_ITa[5*i+1];
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int p = V_ITa[5*i+2];
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float weight = V_W[i];
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float wp = 1.0f/static_cast<float>(n);
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float beta = 0.25f * cosf(static_cast<float>(M_PI) * 2.0f * wp) + 0.375f;
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beta = beta * beta;
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beta = (0.625f - beta) * wp;
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int dstIndex = i + vertexOffset - tableOffset;
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int threadId = omp_get_thread_num();
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float *vertexResults = vertexResultsArray +
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vertexDesc.length * threadId;
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float *varyingResults = varyingResultsArray +
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varyingDesc.length * threadId;
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clear(vertexResults, vertexDesc);
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clear(varyingResults, varyingDesc);
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addWithWeight(vertexResults, vertex, p, weight * (1.0f - (beta * n)), vertexDesc);
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for (int j = 0; j < n; ++j)
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addWithWeight(vertexResults, vertex, V_IT[h+j], weight * beta, vertexDesc);
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addWithWeight(varyingResults, varying, p, 1.0f, varyingDesc);
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copy(vertex, vertexResults, dstIndex, vertexDesc);
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copy(varying, varyingResults, dstIndex, varyingDesc);
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}
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}
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void OsdOmpComputeBilinearEdge(
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float * vertex, float * varying,
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OsdVertexBufferDescriptor const &vertexDesc,
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OsdVertexBufferDescriptor const &varyingDesc,
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const int *E_IT, int vertexOffset, int tableOffset, int start, int end) {
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int numThreads = omp_get_max_threads();
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float *vertexResultsArray = (float*)alloca(vertexDesc.length * sizeof(float) * numThreads);
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float *varyingResultsArray = (float*)alloca(varyingDesc.length * sizeof(float) * numThreads);
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#pragma omp parallel for
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for (int i = start + tableOffset; i < end + tableOffset; i++) {
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int eidx0 = E_IT[2*i+0];
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int eidx1 = E_IT[2*i+1];
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int dstIndex = i + vertexOffset - tableOffset;
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int threadId = omp_get_thread_num();
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float *vertexResults = vertexResultsArray +
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vertexDesc.length * threadId;
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float *varyingResults = varyingResultsArray +
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varyingDesc.length * threadId;
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clear(vertexResults, vertexDesc);
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clear(varyingResults, varyingDesc);
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addWithWeight(vertexResults, vertex, eidx0, 0.5f, vertexDesc);
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addWithWeight(vertexResults, vertex, eidx1, 0.5f, vertexDesc);
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addWithWeight(varyingResults, varying, eidx0, 0.5f, varyingDesc);
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addWithWeight(varyingResults, varying, eidx1, 0.5f, varyingDesc);
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copy(vertex, vertexResults, dstIndex, vertexDesc);
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copy(varying, varyingResults, dstIndex, varyingDesc);
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}
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}
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void OsdOmpComputeBilinearVertex(
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float * vertex, float * varying,
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OsdVertexBufferDescriptor const &vertexDesc,
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OsdVertexBufferDescriptor const &varyingDesc,
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const int *V_ITa, int vertexOffset, int tableOffset, int start, int end) {
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int numThreads = omp_get_max_threads();
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float *vertexResultsArray = (float*)alloca(vertexDesc.length * sizeof(float) * numThreads);
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float *varyingResultsArray = (float*)alloca(varyingDesc.length * sizeof(float) * numThreads);
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#pragma omp parallel for
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for (int i = start + tableOffset; i < end + tableOffset; i++) {
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int p = V_ITa[i];
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int dstIndex = i + vertexOffset - tableOffset;
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int threadId = omp_get_thread_num();
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float *vertexResults = vertexResultsArray +
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vertexDesc.length * threadId;
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float *varyingResults = varyingResultsArray +
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varyingDesc.length * threadId;
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clear(vertexResults, vertexDesc);
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clear(varyingResults, varyingDesc);
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addWithWeight(vertexResults, vertex, p, 1.0f, vertexDesc);
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addWithWeight(varyingResults, varying, p, 1.0f, varyingDesc);
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copy(vertex, vertexResults, dstIndex, vertexDesc);
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copy(varying, varyingResults, dstIndex, varyingDesc);
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}
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}
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void OsdOmpEditVertexAdd(
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float * vertex,
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OsdVertexBufferDescriptor const &vertexDesc,
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int primVarOffset, int primVarWidth, int vertexOffset, int tableOffset,
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int start, int end,
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const unsigned int *editIndices, const float *editValues) {
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#pragma omp parallel for
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for (int i = start+tableOffset; i < end+tableOffset; i++) {
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if (vertex) {
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int editIndex = editIndices[i] + vertexOffset;
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float *dst = vertex + editIndex * vertexDesc.stride + primVarOffset;
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for (int i = 0; i < primVarWidth; ++i) {
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dst[i] += editValues[i];
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}
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}
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}
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}
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void OsdOmpEditVertexSet(
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float * vertex,
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OsdVertexBufferDescriptor const &vertexDesc,
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int primVarOffset, int primVarWidth, int vertexOffset, int tableOffset,
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int start, int end,
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const unsigned int *editIndices, const float *editValues) {
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#pragma omp parallel for
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for (int i = start+tableOffset; i < end+tableOffset; i++) {
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if (vertex) {
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int editIndex = editIndices[i] + vertexOffset;
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float *dst = vertex + editIndex * vertexDesc.stride + primVarOffset;
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for (int i = 0; i < primVarWidth; ++i) {
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dst[i] = editValues[i];
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}
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}
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}
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}
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} // end namespace OPENSUBDIV_VERSION
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} // end namespace OpenSubdiv
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