mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
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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.
282 lines
9.9 KiB
C++
282 lines
9.9 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/gcdKernel.h"
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#include "../osd/cpuKernel.h"
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#include "../osd/vertexDescriptor.h"
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#include <math.h>
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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const int GCD_WORK_STRIDE = 32;
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static inline void
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clear(float *origin, int index, OsdVertexBufferDescriptor const &desc) {
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if (origin) {
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float *dst = origin + index * desc.stride + desc.offset;
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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 *origin, int dstIndex, int srcIndex,
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float weight, OsdVertexBufferDescriptor const &desc) {
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if (origin) {
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const float *src = origin + srcIndex * desc.stride + desc.offset;
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float *dst = origin + dstIndex * desc.stride + desc.offset;
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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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void OsdGcdComputeFace(
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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,
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int vertexOffset, int tableOffset, int start, int end,
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dispatch_queue_t gcdq) {
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const int workSize = end-start;
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dispatch_apply(workSize/GCD_WORK_STRIDE, gcdq, ^(size_t blockIdx){
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const int start_i = start + blockIdx*GCD_WORK_STRIDE;
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const int end_i = start_i + GCD_WORK_STRIDE;
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OsdCpuComputeFace(vertex, varying, vertexDesc, varyingDesc,
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F_IT, F_ITa,
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vertexOffset, tableOffset, start_i, end_i);
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});
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const int start_e = end - workSize%GCD_WORK_STRIDE;
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const int end_e = end;
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if (start_e < end_e)
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OsdCpuComputeFace(vertex, varying, vertexDesc, varyingDesc,
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F_IT, F_ITa,
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vertexOffset, tableOffset, start_e, end_e);
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}
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void OsdGcdComputeEdge(
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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,
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int vertexOffset, int tableOffset, int start, int end,
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dispatch_queue_t gcdq) {
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const int workSize = end-start;
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dispatch_apply(workSize/GCD_WORK_STRIDE, gcdq, ^(size_t blockIdx){
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const int start_i = start + blockIdx*GCD_WORK_STRIDE;
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const int end_i = start_i + GCD_WORK_STRIDE;
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OsdCpuComputeEdge(vertex, varying, vertexDesc, varyingDesc,
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E_IT, E_W,
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vertexOffset, tableOffset, start_i, end_i);
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});
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const int start_e = end - workSize%GCD_WORK_STRIDE;
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const int end_e = end;
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if (start_e < end_e)
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OsdCpuComputeEdge(vertex, varying, vertexDesc, varyingDesc,
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E_IT, E_W,
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vertexOffset, tableOffset, start_e, end_e);
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}
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void OsdGcdComputeVertexA(
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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 vertexOffset, int tableOffset, int start, int end, int pass,
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dispatch_queue_t gcdq) {
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const int workSize = end-start;
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dispatch_apply(workSize/GCD_WORK_STRIDE, gcdq, ^(size_t blockIdx){
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const int start_i = start + blockIdx*GCD_WORK_STRIDE;
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const int end_i = start_i + GCD_WORK_STRIDE;
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OsdCpuComputeVertexA(vertex, varying, vertexDesc, varyingDesc,
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V_ITa, V_W,
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vertexOffset, tableOffset, start_i, end_i, pass);
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});
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const int start_e = end - workSize%GCD_WORK_STRIDE;
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const int end_e = end;
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if (start_e < end_e)
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OsdCpuComputeVertexA(vertex, varying, vertexDesc, varyingDesc,
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V_ITa, V_W,
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vertexOffset, tableOffset, start_e, end_e, pass);
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}
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void OsdGcdComputeVertexB(
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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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dispatch_queue_t gcdq) {
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const int workSize = end-start;
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dispatch_apply(workSize/GCD_WORK_STRIDE, gcdq, ^(size_t blockIdx){
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const int start_i = start + blockIdx*GCD_WORK_STRIDE;
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const int end_i = start_i + GCD_WORK_STRIDE;
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OsdCpuComputeVertexB(vertex, varying, vertexDesc, varyingDesc,
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V_ITa, V_IT, V_W,
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vertexOffset, tableOffset, start_i, end_i);
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});
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const int start_e = end - workSize%GCD_WORK_STRIDE;
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const int end_e = end;
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if (start_e < end_e)
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OsdCpuComputeVertexB(vertex, varying, vertexDesc, varyingDesc,
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V_ITa, V_IT, V_W,
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vertexOffset, tableOffset, start_e, end_e);
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}
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void OsdGcdComputeLoopVertexB(
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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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dispatch_queue_t gcdq) {
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dispatch_apply(end-start, gcdq, ^(size_t blockIdx){
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int i = start+blockIdx+tableOffset;
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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 = vertexOffset + i - tableOffset;
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clear(vertex, dstIndex, vertexDesc);
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clear(varying, dstIndex, varyingDesc);
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addWithWeight(vertex, dstIndex, p, weight * (1.0f - (beta * n)), vertexDesc);
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for (int j = 0; j < n; ++j)
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addWithWeight(vertex, dstIndex, V_IT[h+j], weight * beta, vertexDesc);
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addWithWeight(varying, dstIndex, p, 1.0f, varyingDesc);
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});
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}
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void OsdGcdComputeBilinearEdge(
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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,
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int vertexOffset, int tableOffset, int start, int end,
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dispatch_queue_t gcdq) {
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dispatch_apply(end-start, gcdq, ^(size_t blockIdx){
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int i = start+blockIdx+tableOffset;
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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 = vertexOffset + i - tableOffset;
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clear(vertex, dstIndex, vertexDesc);
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clear(varying, dstIndex, varyingDesc);
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addWithWeight(vertex, dstIndex, eidx0, 0.5f, vertexDesc);
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addWithWeight(vertex, dstIndex, eidx1, 0.5f, vertexDesc);
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addWithWeight(varying, dstIndex, eidx0, 0.5f, varyingDesc);
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addWithWeight(varying, dstIndex, eidx1, 0.5f, varyingDesc);
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});
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}
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void OsdGcdComputeBilinearVertex(
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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,
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int vertexOffset, int tableOffset, int start, int end,
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dispatch_queue_t gcdq) {
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dispatch_apply(end-start, gcdq, ^(size_t blockIdx){
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int i = start+blockIdx+tableOffset;
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int p = V_ITa[i];
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int dstIndex = vertexOffset + i - tableOffset;
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clear(vertex, dstIndex, vertexDesc);
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clear(varying, dstIndex, varyingDesc);
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addWithWeight(vertex, dstIndex, p, 1.0f, vertexDesc);
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addWithWeight(varying, dstIndex, p, 1.0f, varyingDesc);
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});
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}
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void OsdGcdEditVertexAdd(
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float * vertex,
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OsdVertexBufferDescriptor const &vertexDesc,
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int primVarOffset, int primVarWidth,
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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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dispatch_queue_t gcdq) {
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int vertexCount = end - start;
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dispatch_apply(vertexCount, gcdq, ^(size_t blockIdx){
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int i = start + blockIdx + tableOffset;
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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
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+ vertexDesc.offset + primVarOffset;
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dst[i] += editValues[i];
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}
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});
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}
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void OsdGcdEditVertexSet(
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float * vertex,
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OsdVertexBufferDescriptor const &vertexDesc,
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int primVarOffset, int primVarWidth,
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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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dispatch_queue_t gcdq) {
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int vertexCount = end - start;
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dispatch_apply(vertexCount, gcdq, ^(size_t blockIdx){
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int i = start + blockIdx + tableOffset;
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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
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+ vertexDesc.offset + primVarOffset;
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dst[i] = editValues[i];
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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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