241 lines
11 KiB
C++
241 lines
11 KiB
C++
/* SPDX-FileCopyrightText: 2013 Blender Foundation
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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#include <cstdint> // for uint64_t
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#include "opensubdiv_capi_type.hh"
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struct OpenSubdiv_EvaluatorCacheImpl;
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struct OpenSubdiv_EvaluatorImpl;
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struct OpenSubdiv_EvaluatorInternal;
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struct OpenSubdiv_PatchCoord;
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struct OpenSubdiv_TopologyRefiner;
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struct OpenSubdiv_EvaluatorSettings {
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// Number of smoothly interpolated vertex data channels.
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int num_vertex_data;
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};
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// Callback type for doing input/output operations on buffers.
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// Useful to abstract GPU buffers.
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struct OpenSubdiv_Buffer {
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// Bind the buffer to the GPU.
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void (*bind_gpu)(const OpenSubdiv_Buffer *buffer);
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// Allocate the buffer directly on the host for the given size in bytes. This has to return
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// a pointer to the newly allocated memory.
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void *(*alloc)(const OpenSubdiv_Buffer *buffer, const unsigned int size);
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// Allocate the buffer directly on the device for the given size in bytes.
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void (*device_alloc)(const OpenSubdiv_Buffer *buffer, const unsigned int size);
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// Update the given range of the buffer with new data.
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void (*device_update)(const OpenSubdiv_Buffer *buffer,
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unsigned int start,
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unsigned int len,
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const void *data);
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// Wrap an existing GPU buffer, given its device handle, into the client's buffer type for
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// read-only use.
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void (*wrap_device_handle)(const OpenSubdiv_Buffer *buffer, uint64_t device_ptr);
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// Offset in the buffer where the data starts, if a single buffer is used for multiple data
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// channels.
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int buffer_offset;
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// Pointer to the client buffer data, which is modified or initialized through the various
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// callbacks.
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void *data;
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};
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struct OpenSubdiv_Evaluator {
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// Set settings for data buffers used.
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void (*setSettings)(OpenSubdiv_Evaluator *evaluator,
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const OpenSubdiv_EvaluatorSettings *settings);
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// Set coarse positions from a continuous array of coordinates.
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void (*setCoarsePositions)(OpenSubdiv_Evaluator *evaluator,
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const float *positions,
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const int start_vertex_index,
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const int num_vertices);
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// Set vertex data from a continuous array of coordinates.
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void (*setVertexData)(OpenSubdiv_Evaluator *evaluator,
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const float *data,
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const int start_vertex_index,
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const int num_vertices);
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// Set varying data from a continuous array of data.
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void (*setVaryingData)(OpenSubdiv_Evaluator *evaluator,
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const float *varying_data,
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const int start_vertex_index,
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const int num_vertices);
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// Set face varying data from a continuous array of data.
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//
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// TODO(sergey): Find a better name for vertex here. It is not the vertex of
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// geometry, but a vertex of UV map.
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void (*setFaceVaryingData)(OpenSubdiv_Evaluator *evaluator,
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const int face_varying_channel,
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const float *face_varying_data,
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const int start_vertex_index,
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const int num_vertices);
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// Set coarse vertex position from a continuous memory buffer where
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// first coordinate starts at offset of `start_offset` and there is `stride`
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// bytes between adjacent vertex coordinates.
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void (*setCoarsePositionsFromBuffer)(OpenSubdiv_Evaluator *evaluator,
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const void *buffer,
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const int start_offset,
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const int stride,
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const int start_vertex_index,
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const int num_vertices);
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// Set varying data from a continuous memory buffer where
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// first coordinate starts at offset of `start_offset` and there is `stride`
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// bytes between adjacent vertex coordinates.
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void (*setVaryingDataFromBuffer)(OpenSubdiv_Evaluator *evaluator,
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const void *buffer,
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const int start_offset,
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const int stride,
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const int start_vertex_index,
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const int num_vertices);
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// Set face varying data from a continuous memory buffer where
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// first coordinate starts at offset of `start_offset` and there is `stride`
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// bytes between adjacent vertex coordinates.
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//
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// TODO(sergey): Find a better name for vertex here. It is not the vertex of
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// geometry, but a vertex of UV map.
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void (*setFaceVaryingDataFromBuffer)(OpenSubdiv_Evaluator *evaluator,
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const int face_varying_channel,
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const void *buffer,
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const int start_offset,
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const int stride,
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const int start_vertex_index,
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const int num_vertices);
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// Refine after coarse positions update.
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void (*refine)(OpenSubdiv_Evaluator *evaluator);
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// Evaluate given ptex face at given bilinear coordinate.
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// If derivatives are NULL, they will not be evaluated.
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void (*evaluateLimit)(OpenSubdiv_Evaluator *evaluator,
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const int ptex_face_index,
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float face_u,
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float face_v,
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float P[3],
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float dPdu[3],
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float dPdv[3]);
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// Evaluate vertex data at a given bilinear coordinate of given ptex face.
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void (*evaluateVertexData)(OpenSubdiv_Evaluator *evaluator,
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const int ptex_face_index,
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float face_u,
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float face_v,
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float data[]);
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// Evaluate varying data at a given bilinear coordinate of given ptex face.
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void (*evaluateVarying)(OpenSubdiv_Evaluator *evaluator,
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const int ptex_face_index,
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float face_u,
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float face_v,
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float varying[3]);
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// Evaluate face-varying data at a given bilinear coordinate of given
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// ptex face.
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void (*evaluateFaceVarying)(OpenSubdiv_Evaluator *evaluator,
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const int face_varying_channel,
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const int ptex_face_index,
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float face_u,
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float face_v,
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float face_varying[2]);
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// Batched evaluation of multiple input coordinates.
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// Evaluate limit surface.
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// If derivatives are NULL, they will not be evaluated.
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//
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// NOTE: Output arrays must point to a memory of size float[3]*num_patch_coords.
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void (*evaluatePatchesLimit)(OpenSubdiv_Evaluator *evaluator,
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const OpenSubdiv_PatchCoord *patch_coords,
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const int num_patch_coords,
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float *P,
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float *dPdu,
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float *dPdv);
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// Copy the patch map to the given buffers, and output some topology information.
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void (*getPatchMap)(OpenSubdiv_Evaluator *evaluator,
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OpenSubdiv_Buffer *patch_map_handles,
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OpenSubdiv_Buffer *patch_map_quadtree,
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int *min_patch_face,
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int *max_patch_face,
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int *max_depth,
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int *patches_are_triangular);
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// Fill the given buffer with data from the evaluator's patch array buffer.
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void (*fillPatchArraysBuffer)(OpenSubdiv_Evaluator *evaluator,
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OpenSubdiv_Buffer *patch_array_buffer);
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// Fill the given buffer with data from the evaluator's patch index buffer.
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void (*wrapPatchIndexBuffer)(OpenSubdiv_Evaluator *evaluator,
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OpenSubdiv_Buffer *patch_index_buffer);
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// Fill the given buffer with data from the evaluator's patch parameter buffer.
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void (*wrapPatchParamBuffer)(OpenSubdiv_Evaluator *evaluator,
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OpenSubdiv_Buffer *patch_param_buffer);
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// Fill the given buffer with data from the evaluator's source buffer.
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void (*wrapSrcBuffer)(OpenSubdiv_Evaluator *evaluator, OpenSubdiv_Buffer *src_buffer);
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// Fill the given buffer with data from the evaluator's extra source buffer.
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void (*wrapSrcVertexDataBuffer)(OpenSubdiv_Evaluator *evaluator, OpenSubdiv_Buffer *src_buffer);
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// Fill the given buffer with data from the evaluator's face varying patch array buffer.
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void (*fillFVarPatchArraysBuffer)(OpenSubdiv_Evaluator *evaluator,
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const int face_varying_channel,
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OpenSubdiv_Buffer *patch_array_buffer);
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// Fill the given buffer with data from the evaluator's face varying patch index buffer.
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void (*wrapFVarPatchIndexBuffer)(OpenSubdiv_Evaluator *evaluator,
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const int face_varying_channel,
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OpenSubdiv_Buffer *patch_index_buffer);
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// Fill the given buffer with data from the evaluator's face varying patch parameter buffer.
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void (*wrapFVarPatchParamBuffer)(OpenSubdiv_Evaluator *evaluator,
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const int face_varying_channel,
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OpenSubdiv_Buffer *patch_param_buffer);
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// Fill the given buffer with data from the evaluator's face varying source buffer.
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void (*wrapFVarSrcBuffer)(OpenSubdiv_Evaluator *evaluator,
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const int face_varying_channel,
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OpenSubdiv_Buffer *src_buffer);
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// Return true if the evaluator has source vertex data set.
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bool (*hasVertexData)(OpenSubdiv_Evaluator *evaluator);
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// Implementation of the evaluator.
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OpenSubdiv_EvaluatorImpl *impl;
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// Type of the evaluator.
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eOpenSubdivEvaluator type;
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};
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struct OpenSubdiv_EvaluatorCache {
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// Implementation of the evaluator cache.
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OpenSubdiv_EvaluatorCacheImpl *impl;
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};
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OpenSubdiv_Evaluator *openSubdiv_createEvaluatorFromTopologyRefiner(
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OpenSubdiv_TopologyRefiner *topology_refiner,
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eOpenSubdivEvaluator evaluator_type,
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OpenSubdiv_EvaluatorCache *evaluator_cache);
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void openSubdiv_deleteEvaluator(OpenSubdiv_Evaluator *evaluator);
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OpenSubdiv_EvaluatorCache *openSubdiv_createEvaluatorCache(eOpenSubdivEvaluator evaluator_type);
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void openSubdiv_deleteEvaluatorCache(OpenSubdiv_EvaluatorCache *evaluator_cache);
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// Return the GLSL source code from the OpenSubDiv library used for patch evaluation.
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// This function is not thread-safe.
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const char *openSubdiv_getGLSLPatchBasisSource(void);
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