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https://github.com/PixarAnimationStudios/OpenSubdiv
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541aeddd3a
Add EvalStencils and EvalPatches API for most of CPU and GPU evaluators. with this change, Eval API in the osd layer consists of following parts: - Evaluators (Cpu, Omp, Tbb, Cuda, CL, GLXFB, GLCompute, D3D11Compute) implements EvalStencils and EvalPatches(*). Both supports derivatives (not fully implemented though) - Interop vertex buffer classes (optional, same as before) Note that these classes are not necessary to use Evaluators. All evaluators have EvalStencils/Patches which take device-specific buffer objects. For example, GLXFBEvaluator can take GLuint directly for both stencil tables and input primvars. Although using these interop classes makes it easy to integrate osd into relatively simple applications. - device-dependent StencilTable and PatchTable (optional) These are also optional, but can be used simply a substitute of Far::StencilTable and Far::PatchTable for osd evaluators. - PatchArray, PatchCoord, PatchParam They are tiny structs used for GPU based patch evaluation. (*) TODO and known issues: - CLEvaluator and D3D11Evaluator's EvalPatches() have not been implemented. - GPU Gregory patch evaluation has not been implemented in EvalPatches(). - CudaEvaluator::EvalPatches() is very unstable. - All patch evaluation kernels have not been well optimized. - Currently GLXFB kernel doesn't support derivative evaluation. There's a technical difficulty for the multi-stream output.
84 lines
2.6 KiB
C++
84 lines
2.6 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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#ifndef OPENSUBDIV3_OSD_CPU_VERTEX_BUFFER_H
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#define OPENSUBDIV3_OSD_CPU_VERTEX_BUFFER_H
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#include "../version.h"
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#include <cstddef>
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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namespace Osd {
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/// \brief Concrete vertex buffer class for cpu subvision.
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///
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/// CpuVertexBuffer implements the VertexBufferInterface. An instance
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/// of this buffer class can be passed to CpuEvaluator
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///
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class CpuVertexBuffer {
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public:
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/// Creator. Returns NULL if error.
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static CpuVertexBuffer * Create(int numElements, int numVertices,
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void *deviceContext = NULL);
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/// Destructor.
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~CpuVertexBuffer();
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/// This method is meant to be used in client code in order to provide
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/// coarse vertices data to Osd.
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void UpdateData(const float *src, int startVertex, int numVertices,
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void *deviceContext = NULL);
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/// Returns how many elements defined in this vertex buffer.
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int GetNumElements() const;
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/// Returns how many vertices allocated in this vertex buffer.
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int GetNumVertices() const;
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/// Returns the address of CPU buffer
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float * BindCpuBuffer();
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protected:
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/// Constructor.
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CpuVertexBuffer(int numElements, int numVertices);
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private:
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int _numElements;
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int _numVertices;
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float *_cpuBuffer;
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};
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} // end namespace Osd
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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 // OPENSUBDIV3_OSD_CPU_VERTEX_BUFFER_H
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