Sergey Sharybin
f8a499b596
C-API is way smaller than the rest of the code which uses it. So better to conditionally compile stub implementation than to keep adding ifdef everywhere.
288 lines
9.8 KiB
C++
288 lines
9.8 KiB
C++
// Copyright 2013 Blender Foundation. All rights reserved.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software Foundation,
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// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// Author: Sergey Sharybin
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// Contributor(s): Brecht van Lommel
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#include "opensubdiv_gl_mesh_capi.h"
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#ifdef _MSC_VER
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# include <iso646.h>
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#endif
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#include <opensubdiv/far/stencilTable.h>
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#include <opensubdiv/osd/glMesh.h>
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#include <opensubdiv/osd/glPatchTable.h>
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using OpenSubdiv::Far::StencilTable;
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using OpenSubdiv::Osd::GLMeshInterface;
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using OpenSubdiv::Osd::GLPatchTable;
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using OpenSubdiv::Osd::Mesh;
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using OpenSubdiv::Osd::MeshBitset;
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// CPU backend.
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#include <opensubdiv/osd/cpuEvaluator.h>
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#include <opensubdiv/osd/cpuGLVertexBuffer.h>
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using OpenSubdiv::Osd::CpuGLVertexBuffer;
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using OpenSubdiv::Osd::CpuEvaluator;
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typedef Mesh<CpuGLVertexBuffer,
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StencilTable,
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CpuEvaluator,
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GLPatchTable> OsdCpuMesh;
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// OpenMP backend.
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#ifdef OPENSUBDIV_HAS_OPENMP
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# include <opensubdiv/osd/ompEvaluator.h>
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using OpenSubdiv::Osd::OmpEvaluator;
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typedef Mesh<CpuGLVertexBuffer,
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StencilTable,
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OmpEvaluator,
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GLPatchTable> OsdOmpMesh;
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#endif
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// OpenCL backend.
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#ifdef OPENSUBDIV_HAS_OPENCL
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# include <opensubdiv/osd/clEvaluator.h>
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# include <opensubdiv/osd/clGLVertexBuffer.h>
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# include "opensubdiv_device_context_opencl.h"
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using OpenSubdiv::Osd::CLEvaluator;
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using OpenSubdiv::Osd::CLGLVertexBuffer;
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using OpenSubdiv::Osd::CLStencilTable;
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/* TODO(sergey): Use CLDeviceContext similar to OSD examples? */
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typedef Mesh<CLGLVertexBuffer,
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CLStencilTable,
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CLEvaluator,
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GLPatchTable,
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CLDeviceContext> OsdCLMesh;
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static CLDeviceContext g_cl_device_context;
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#endif
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// CUDA backend.
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#ifdef OPENSUBDIV_HAS_CUDA
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# include <opensubdiv/osd/cudaEvaluator.h>
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# include <opensubdiv/osd/cudaGLVertexBuffer.h>
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# include "opensubdiv_device_context_cuda.h"
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using OpenSubdiv::Osd::CudaEvaluator;
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using OpenSubdiv::Osd::CudaGLVertexBuffer;
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using OpenSubdiv::Osd::CudaStencilTable;
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typedef Mesh<CudaGLVertexBuffer,
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CudaStencilTable,
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CudaEvaluator,
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GLPatchTable> OsdCudaMesh;
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static CudaDeviceContext g_cuda_device_context;
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#endif
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// Transform feedback backend.
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#ifdef OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK
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# include <opensubdiv/osd/glVertexBuffer.h>
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# include <opensubdiv/osd/glXFBEvaluator.h>
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using OpenSubdiv::Osd::GLXFBEvaluator;
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using OpenSubdiv::Osd::GLStencilTableTBO;
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using OpenSubdiv::Osd::GLVertexBuffer;
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typedef Mesh<GLVertexBuffer,
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GLStencilTableTBO,
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GLXFBEvaluator,
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GLPatchTable> OsdGLSLTransformFeedbackMesh;
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#endif
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// GLSL compute backend.
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#ifdef OPENSUBDIV_HAS_GLSL_COMPUTE
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# include <opensubdiv/osd/glComputeEvaluator.h>
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# include <opensubdiv/osd/glVertexBuffer.h>
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using OpenSubdiv::Osd::GLComputeEvaluator;
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using OpenSubdiv::Osd::GLStencilTableSSBO;
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using OpenSubdiv::Osd::GLVertexBuffer;
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typedef Mesh<GLVertexBuffer,
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GLStencilTableSSBO,
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GLComputeEvaluator,
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GLPatchTable> OsdGLSLComputeMesh;
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#endif
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#include <string>
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#include <vector>
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#include "MEM_guardedalloc.h"
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#include "opensubdiv_topology_refiner_capi.h"
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#include "internal/opensubdiv_gl_mesh_draw.h"
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#include "internal/opensubdiv_gl_mesh_fvar.h"
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#include "internal/opensubdiv_gl_mesh_internal.h"
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#include "internal/opensubdiv_topology_refiner_internal.h"
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namespace {
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GLMeshInterface* createGLMeshInterface(
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OpenSubdiv::Far::TopologyRefiner* topology_refiner,
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const MeshBitset& bits,
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const int num_vertex_elements,
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const int num_varying_elements,
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const int level,
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eOpenSubdivEvaluator evaluator_type) {
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GLMeshInterface* mesh = NULL;
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switch (evaluator_type) {
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#define CHECK_EVALUATOR_TYPE(type, class) \
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case OPENSUBDIV_EVALUATOR_##type: \
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mesh = new class(topology_refiner, \
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num_vertex_elements, \
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num_varying_elements, \
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level, \
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bits); \
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break;
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#define CHECK_EVALUATOR_TYPE_STUB(type) \
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case OPENSUBDIV_EVALUATOR_##type: \
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mesh = NULL; \
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break;
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CHECK_EVALUATOR_TYPE(CPU, OsdCpuMesh)
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#ifdef OPENSUBDIV_HAS_OPENMP
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CHECK_EVALUATOR_TYPE(OPENMP, OsdOmpMesh)
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#else
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CHECK_EVALUATOR_TYPE_STUB(OPENMP)
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#endif
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#ifdef OPENSUBDIV_HAS_OPENCL
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CHECK_EVALUATOR_TYPE(OPENCL, OsdCLMesh)
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#else
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CHECK_EVALUATOR_TYPE_STUB(OPENCL)
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#endif
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#ifdef OPENSUBDIV_HAS_CUDA
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CHECK_EVALUATOR_TYPE(CUDA, OsdCudaMesh)
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#else
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CHECK_EVALUATOR_TYPE_STUB(CUDA)
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#endif
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#ifdef OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK
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CHECK_EVALUATOR_TYPE(GLSL_TRANSFORM_FEEDBACK, OsdGLSLTransformFeedbackMesh)
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#else
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CHECK_EVALUATOR_TYPE_STUB(GLSL_TRANSFORM_FEEDBACK)
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#endif
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#ifdef OPENSUBDIV_HAS_GLSL_COMPUTE
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CHECK_EVALUATOR_TYPE(GLSL_COMPUTE, OsdGLSLComputeMesh)
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#else
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CHECK_EVALUATOR_TYPE_STUB(GLSL_COMPUTE)
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#endif
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#undef CHECK_EVALUATOR_TYPE
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#undef CHECK_EVALUATOR_TYPE_STUB
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}
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return mesh;
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}
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////////////////////////////////////////////////////////////////////////////////
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// GLMesh structure "methods".
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opensubdiv_capi::GLMeshFVarData* createFVarData(
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OpenSubdiv::Far::TopologyRefiner* topology_refiner,
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GLMeshInterface* mesh,
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const float *fvar_src_buffer) {
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using opensubdiv_capi::GLMeshFVarData;
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GLMeshFVarData* fvar_data = new GLMeshFVarData();
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fvar_data->create(topology_refiner,
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mesh->GetFarPatchTable(),
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2,
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fvar_src_buffer);
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return fvar_data;
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}
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unsigned int getPatchIndexBuffer(OpenSubdiv_GLMesh* gl_mesh) {
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return gl_mesh->internal->mesh_interface
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->GetPatchTable()
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->GetPatchIndexBuffer();
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}
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void bindVertexBuffer(OpenSubdiv_GLMesh* gl_mesh) {
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gl_mesh->internal->mesh_interface->BindVertexBuffer();
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}
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void setCoarsePositions(OpenSubdiv_GLMesh* gl_mesh,
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const float* positions,
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const int start_vertex,
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const int num_vertices) {
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gl_mesh->internal->mesh_interface->UpdateVertexBuffer(positions,
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start_vertex,
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num_vertices);
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}
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void refine(OpenSubdiv_GLMesh* gl_mesh) {
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gl_mesh->internal->mesh_interface->Refine();
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}
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void synchronize(struct OpenSubdiv_GLMesh* gl_mesh) {
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gl_mesh->internal->mesh_interface->Synchronize();
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}
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void assignFunctionPointers(OpenSubdiv_GLMesh* gl_mesh) {
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gl_mesh->getPatchIndexBuffer = getPatchIndexBuffer;
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gl_mesh->bindVertexBuffer = bindVertexBuffer;
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gl_mesh->setCoarsePositions = setCoarsePositions;
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gl_mesh->refine = refine;
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gl_mesh->synchronize = synchronize;
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gl_mesh->prepareDraw = opensubdiv_capi::GLMeshDisplayPrepare;
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gl_mesh->drawPatches = opensubdiv_capi::GLMeshDisplayDrawPatches;
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}
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} // namespace
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struct OpenSubdiv_GLMesh *openSubdiv_createOsdGLMeshFromTopologyRefiner(
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OpenSubdiv_TopologyRefiner* topology_refiner,
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eOpenSubdivEvaluator evaluator_type) {
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using OpenSubdiv::Far::TopologyRefiner;
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TopologyRefiner* osd_topology_refiner =
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topology_refiner->internal->osd_topology_refiner;
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// TODO(sergey): Query this from refiner.
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const bool is_adaptive = false;
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MeshBitset bits;
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bits.set(OpenSubdiv::Osd::MeshAdaptive, is_adaptive);
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bits.set(OpenSubdiv::Osd::MeshUseSingleCreasePatch, 0);
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bits.set(OpenSubdiv::Osd::MeshInterleaveVarying, 1);
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bits.set(OpenSubdiv::Osd::MeshFVarData, 1);
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bits.set(OpenSubdiv::Osd::MeshEndCapBSplineBasis, 1);
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const int num_vertex_elements = 3;
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const int num_varying_elements = 3;
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GLMeshInterface* mesh = createGLMeshInterface(
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osd_topology_refiner,
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bits,
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num_vertex_elements,
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num_varying_elements,
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osd_topology_refiner->GetMaxLevel(),
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evaluator_type);
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if (mesh == NULL) {
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return NULL;
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}
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OpenSubdiv_GLMesh* gl_mesh = OBJECT_GUARDED_NEW(OpenSubdiv_GLMesh);
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assignFunctionPointers(gl_mesh);
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gl_mesh->internal = new OpenSubdiv_GLMeshInternal();
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gl_mesh->internal->evaluator_type = evaluator_type;
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gl_mesh->internal->mesh_interface = mesh;
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// Face-varying support.
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// TODO(sergey): This part needs to be re-done.
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if (osd_topology_refiner->GetNumFVarChannels() > 0) {
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// TODO(sergey): This is a temporary stub to get things compiled. Need
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// to store base level UVs somewhere else.
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std::vector<float> uvs;
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std::vector<float> fvar_data_buffer;
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opensubdiv_capi::interpolateFVarData(*osd_topology_refiner,
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uvs,
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&fvar_data_buffer);
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gl_mesh->internal->fvar_data = createFVarData(osd_topology_refiner,
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mesh,
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&fvar_data_buffer[0]);
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} else {
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gl_mesh->internal->fvar_data = NULL;
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}
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return gl_mesh;
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}
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void openSubdiv_deleteOsdGLMesh(OpenSubdiv_GLMesh* gl_mesh) {
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delete gl_mesh->internal;
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OBJECT_GUARDED_DELETE(gl_mesh, OpenSubdiv_GLMesh);
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}
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