mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
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360 lines
14 KiB
C++
360 lines
14 KiB
C++
//
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// Copyright (C) Pixar. All rights reserved.
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//
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// This license governs use of the accompanying software. If you
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// use the software, you accept this license. If you do not accept
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// the license, do not use the software.
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//
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// 1. Definitions
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// The terms "reproduce," "reproduction," "derivative works," and
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// "distribution" have the same meaning here as under U.S.
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// copyright law. A "contribution" is the original software, or
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// any additions or changes to the software.
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// A "contributor" is any person or entity that distributes its
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// contribution under this license.
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// "Licensed patents" are a contributor's patent claims that read
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// directly on its contribution.
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//
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// 2. Grant of Rights
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// (A) Copyright Grant- Subject to the terms of this license,
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// including the license conditions and limitations in section 3,
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// each contributor grants you a non-exclusive, worldwide,
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// royalty-free copyright license to reproduce its contribution,
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// prepare derivative works of its contribution, and distribute
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// its contribution or any derivative works that you create.
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// (B) Patent Grant- Subject to the terms of this license,
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// including the license conditions and limitations in section 3,
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// each contributor grants you a non-exclusive, worldwide,
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// royalty-free license under its licensed patents to make, have
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// made, use, sell, offer for sale, import, and/or otherwise
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// dispose of its contribution in the software or derivative works
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// of the contribution in the software.
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//
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// 3. Conditions and Limitations
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// (A) No Trademark License- This license does not grant you
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// rights to use any contributor's name, logo, or trademarks.
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// (B) If you bring a patent claim against any contributor over
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// patents that you claim are infringed by the software, your
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// patent license from such contributor to the software ends
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// automatically.
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// (C) If you distribute any portion of the software, you must
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// retain all copyright, patent, trademark, and attribution
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// notices that are present in the software.
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// (D) If you distribute any portion of the software in source
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// code form, you may do so only under this license by including a
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// complete copy of this license with your distribution. If you
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// distribute any portion of the software in compiled or object
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// code form, you may only do so under a license that complies
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// with this license.
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// (E) The software is licensed "as-is." You bear the risk of
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// using it. The contributors give no express warranties,
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// guarantees or conditions. You may have additional consumer
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// rights under your local laws which this license cannot change.
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// To the extent permitted under your local laws, the contributors
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// exclude the implied warranties of merchantability, fitness for
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// a particular purpose and non-infringement.
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//
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#ifndef OSD_CPU_EVAL_LIMIT_CONTEXT_H
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#define OSD_CPU_EVAL_LIMIT_CONTEXT_H
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#include "../version.h"
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#include "../osd/evalLimitContext.h"
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#include "../osd/vertexDescriptor.h"
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#include <map>
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#include <stdio.h>
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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class OsdCpuEvalLimitContext : public OsdEvalLimitContext {
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public:
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/// \brief Factory
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/// Returns an EvalLimitContext from the given farmesh.
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/// Note : the farmesh is expected to be feature-adaptive and have ptex
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/// coordinates tables.
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static OsdCpuEvalLimitContext * Create(FarMesh<OsdVertex> const * farmesh);
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/// Destructor
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virtual ~OsdCpuEvalLimitContext();
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/// Binds the data buffers.
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///
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/// @param inDesc vertex buffer data descriptor shared by all input data buffers
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///
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/// @param inQ input vertex data
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///
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/// @param outDesc vertex buffer data descriptor shared by all output data buffers
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///
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/// @param outQ output vertex data
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///
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/// @param outdQu optional output derivative along "u" of the vertex data
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///
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/// @param outdQv optional output derivative along "v" of the vertex data
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///
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template<class VERTEX_BUFFER, class OUTPUT_BUFFER>
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void BindVertexBuffers( OsdVertexBufferDescriptor const & inDesc, VERTEX_BUFFER *inQ,
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OsdVertexBufferDescriptor const & outDesc, OUTPUT_BUFFER *outQ,
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OUTPUT_BUFFER *outdQu=0,
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OUTPUT_BUFFER *outdQv=0) {
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_inDesc = inDesc;
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_inQ = inQ ? inQ->BindCpuBuffer() : 0;
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_outDesc = outDesc;
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_outQ = outQ ? outQ->BindCpuBuffer() : 0 ;
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_outdQu = outdQu ? outdQu->BindCpuBuffer() : 0 ;
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_outdQv = outdQv ? outdQv->BindCpuBuffer() : 0 ;
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}
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/// Unbind the data buffers
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void UnbindVertexBuffers() {
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_inQ = 0;
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_outQ = 0;
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_outdQu = 0;
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_outdQv = 0;
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}
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/// Returns the input vertex buffer descriptor
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const OsdVertexBufferDescriptor & GetInputDesc() const {
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return _inDesc;
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}
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/// Returns the output vertex buffer descriptor
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const OsdVertexBufferDescriptor & GetOutputDesc() const {
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return _outDesc;
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}
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/// Returns the input vertex buffer data
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float const * GetInputVertexData() const {
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return _inQ;
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}
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/// Returns the output vertex buffer data
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float * GetOutputVertexData() const {
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return _outQ;
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}
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/// Returns the U derivative of the output vertex buffer data
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float * GetOutputVertexDataUDerivative() const {
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return _outdQu;
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}
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/// Returns the V derivative of the output vertex buffer data
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float * GetOutputVertexDataVDerivative() const {
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return _outdQv;
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}
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/// Returns the vector of patch arrays
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const OsdPatchArrayVector & GetPatchArrayVector() const {
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return _patchArrays;
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}
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/// Returns the vector of per-patch parametric data
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const std::vector<FarPtexCoord::BitField> & GetPatchBitFields() const {
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return _patchBitFields;
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}
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/// The ordered array of control vertex indices for all the patches
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const std::vector<unsigned int> & GetControlVertices() const {
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return _patchBuffer;
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}
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/// XXXX
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const int * GetVertexValenceBuffer() const {
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return &_vertexValenceBuffer[0];
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}
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const unsigned int *GetQuadOffsetBuffer() const {
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return &_quadOffsetBuffer[0];
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}
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/// Maps coarse-face ptex coordinates to children patches
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struct PatchMap {
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public:
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/// \brief Returns the number and list of patch indices for a given face.
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///
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/// PatchMaps map coarse faces to their childrn feature adaptive patches.
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/// Coarse faces are indexed using their ptex face ID to resolve parametric
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/// ambiguity on non-quad faces. Note : this "map" is actually a vector, so
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/// queries are O(1) order.
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///
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/// @param faceid the ptex face index to search for
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///
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/// @param npatches the number of children patches found for the faceid
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///
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/// @param patches a set of pointers to the individual patch handles
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///
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bool GetChildPatchesHandles( int faceid, int * npatches, OsdPatchHandle const ** patches ) const {
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if (_handles.empty() or _offsets.empty() or (faceid>=(int)_offsets.size()))
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return false;
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*npatches = (faceid==(int)_offsets.size()-1 ? (unsigned int)_handles.size()-1 : _offsets[faceid+1]) - _offsets[faceid] + 1;
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*patches = &_handles[ _offsets[faceid] ];
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return true;
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}
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private:
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friend class OsdCpuEvalLimitContext;
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typedef std::multimap<unsigned int, OsdPatchHandle> MultiMap;
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// Inserts the patches from the array into the multimap
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int _AddPatchArray( int arrayid, int ringsize,
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FarPatchTables::PtexCoordinateTable const & ptxtable,
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int & nfaces, MultiMap & mmap ) {
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if (ptxtable.empty())
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return 0;
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for (int i=0; i<(int)ptxtable.size(); ++i) {
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int faceId = ptxtable[i].faceIndex;
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OsdPatchHandle handle = { arrayid, i*ringsize, (unsigned int)mmap.size() };
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mmap.insert( std::pair<unsigned int, OsdPatchHandle>(faceId, handle) );
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nfaces = std::max(nfaces, faceId);
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}
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return 1;
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}
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// Constructor
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PatchMap( FarPatchTables const & patchTables ) {
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int npatches = (int)patchTables.GetNumPatches();
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_handles.reserve(npatches);
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MultiMap mmap;
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// Insert all the patch arrays into the map
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int arrayId=0, nfaces=0;
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arrayId+=_AddPatchArray( arrayId,
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patchTables.GetRegularPatchRingsize(),
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patchTables.GetFullRegularPtexCoordinates(),
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nfaces, mmap );
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arrayId+=_AddPatchArray( arrayId,
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patchTables.GetBoundaryPatchRingsize(),
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patchTables.GetFullBoundaryPtexCoordinates(),
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nfaces, mmap );
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arrayId+=_AddPatchArray( arrayId,
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patchTables.GetCornerPatchRingsize(),
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patchTables.GetFullCornerPtexCoordinates(),
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nfaces, mmap );
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arrayId+=_AddPatchArray( arrayId,
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patchTables.GetGregoryPatchRingsize(),
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patchTables.GetFullGregoryPtexCoordinates(),
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nfaces, mmap );
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for (unsigned char pattern=0; pattern<5; ++pattern) {
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arrayId+=_AddPatchArray( arrayId,
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patchTables.GetRegularPatchRingsize(),
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patchTables.GetTransitionRegularPtexCoordinates(pattern),
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nfaces, mmap );
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for (unsigned char rot=0; rot<4; ++rot) {
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arrayId+=_AddPatchArray( arrayId,
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patchTables.GetBoundaryPatchRingsize(),
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patchTables.GetTransitionBoundaryPtexCoordinates(pattern, rot),
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nfaces, mmap );
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arrayId+=_AddPatchArray( arrayId,
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patchTables.GetCornerPatchRingsize(),
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patchTables.GetTransitionCornerPtexCoordinates(pattern, rot),
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nfaces, mmap );
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}
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}
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++nfaces;
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_handles.resize( mmap.size() );
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_offsets.reserve( nfaces );
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_offsets.push_back(0);
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unsigned int handlesIdx = 0, faceId=mmap.begin()->first;
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// Serialize the multi-map
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for (MultiMap::const_iterator it=mmap.begin(); it!=mmap.end(); ++it, ++handlesIdx) {
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assert(it->first >= faceId);
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if (it->first != faceId) {
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faceId = it->first;
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// position the offset marker to the new face
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_offsets.push_back( handlesIdx );
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}
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// copy the patch id into the table
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_handles[handlesIdx] = it->second;
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}
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}
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// Patch handle allowing location of individual patch data inside patch
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// arrays or in serialized form
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std::vector<OsdPatchHandle> _handles;
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// offset to the first handle of the child patches for each coarse face
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std::vector<unsigned int> _offsets;
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};
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/// Returns a map object that can connect a faceId to a list of children patches
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const PatchMap * GetPatchesMap() const {
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return _patchMap;
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}
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protected:
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explicit OsdCpuEvalLimitContext(FarMesh<OsdVertex> const * farmesh);
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private:
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//--------------------------------------------------------------------------
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int _AppendPatchArray( OsdPatchDescriptor const & desc,
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FarPatchTables::PTable const & pT,
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FarPatchTables::PtexCoordinateTable const & ptxT );
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// Topology data for a mesh
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OsdPatchArrayVector _patchArrays; // patch descriptor for each patch in the mesh
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std::vector<FarPtexCoord::BitField> _patchBitFields; // per-patch parametric info
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std::vector<unsigned int> _patchBuffer; // list of control vertices
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std::vector<int> _vertexValenceBuffer; // extra Gregory patch data buffers
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std::vector<unsigned int> _quadOffsetBuffer;
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PatchMap * _patchMap;
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OsdVertexBufferDescriptor _inDesc,
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_outDesc;
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float * _inQ, // input vertex data
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* _outQ, // output vertex data
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* _outdQu, // U derivative of output vertex data
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* _outdQv; // V derivative of output vertex data
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};
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} // end namespace OPENSUBDIV_VERSION
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using namespace OPENSUBDIV_VERSION;
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} // end namespace OpenSubdiv
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#endif /* OSD_CPU_EVAL_LIMIT_CONTEXT_H */
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