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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2013 Blender Foundation.
* All rights reserved.
*/
#include "opensubdiv_capi.h"
#ifdef _MSC_VER
# include "iso646.h"
#endif
#include <stdlib.h>
#include <GL/glew.h>
#include <opensubdiv/version.h>
#include <opensubdiv/osd/glMesh.h>
/* CPU Backend */
#include <opensubdiv/osd/cpuGLVertexBuffer.h>
#include <opensubdiv/osd/cpuEvaluator.h>
#ifdef OPENSUBDIV_HAS_OPENMP
# include <opensubdiv/osd/ompEvaluator.h>
#endif /* OPENSUBDIV_HAS_OPENMP */
#ifdef OPENSUBDIV_HAS_OPENCL
# include <opensubdiv/osd/clGLVertexBuffer.h>
# include <opensubdiv/osd/clEvaluator.h>
# include "opensubdiv_device_context_opencl.h"
#endif /* OPENSUBDIV_HAS_OPENCL */
#ifdef OPENSUBDIV_HAS_CUDA
# include <opensubdiv/osd/cudaGLVertexBuffer.h>
# include <opensubdiv/osd/cudaEvaluator.h>
# include "opensubdiv_device_context_cuda.h"
#endif /* OPENSUBDIV_HAS_CUDA */
#ifdef OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK
# include <opensubdiv/osd/glXFBEvaluator.h>
# include <opensubdiv/osd/glVertexBuffer.h>
#endif /* OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK */
#ifdef OPENSUBDIV_HAS_GLSL_COMPUTE
# include <opensubdiv/osd/glComputeEvaluator.h>
# include <opensubdiv/osd/glVertexBuffer.h>
#endif /* OPENSUBDIV_HAS_GLSL_COMPUTE */
#include <opensubdiv/osd/glPatchTable.h>
#include <opensubdiv/far/stencilTable.h>
#include <opensubdiv/far/primvarRefiner.h>
#include "opensubdiv_intern.h"
#include "opensubdiv_topology_refiner.h"
#include "MEM_guardedalloc.h"
#include <string>
#include <vector>
using std::string;
using std::vector;
#define STRINGIFY_ARG(x) "" #x
#define STRINGIFY_APPEND(a, b) "" a #b
#define STRINGIFY(x) STRINGIFY_APPEND("", x)
/* **************** Types declaration **************** */
using OpenSubdiv::Osd::GLMeshInterface;
using OpenSubdiv::Osd::Mesh;
using OpenSubdiv::Osd::MeshBitset;
using OpenSubdiv::Far::StencilTable;
using OpenSubdiv::Osd::GLPatchTable;
using OpenSubdiv::Osd::Mesh;
/* CPU backend */
using OpenSubdiv::Osd::CpuGLVertexBuffer;
using OpenSubdiv::Osd::CpuEvaluator;
typedef Mesh<CpuGLVertexBuffer,
StencilTable,
CpuEvaluator,
GLPatchTable> OsdCpuMesh;
#ifdef OPENSUBDIV_HAS_OPENMP
using OpenSubdiv::Osd::OmpEvaluator;
typedef Mesh<CpuGLVertexBuffer,
StencilTable,
OmpEvaluator,
GLPatchTable> OsdOmpMesh;
#endif /* OPENSUBDIV_HAS_OPENMP */
#ifdef OPENSUBDIV_HAS_OPENCL
using OpenSubdiv::Osd::CLEvaluator;
using OpenSubdiv::Osd::CLGLVertexBuffer;
using OpenSubdiv::Osd::CLStencilTable;
/* TODO(sergey): Use CLDeviceCOntext similar to OSD examples? */
typedef Mesh<CLGLVertexBuffer,
CLStencilTable,
CLEvaluator,
GLPatchTable,
CLDeviceContext> OsdCLMesh;
static CLDeviceContext g_clDeviceContext;
#endif /* OPENSUBDIV_HAS_OPENCL */
#ifdef OPENSUBDIV_HAS_CUDA
using OpenSubdiv::Osd::CudaEvaluator;
using OpenSubdiv::Osd::CudaGLVertexBuffer;
using OpenSubdiv::Osd::CudaStencilTable;
typedef Mesh<CudaGLVertexBuffer,
CudaStencilTable,
CudaEvaluator,
GLPatchTable> OsdCudaMesh;
static CudaDeviceContext g_cudaDeviceContext;
#endif /* OPENSUBDIV_HAS_CUDA */
#ifdef OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK
using OpenSubdiv::Osd::GLXFBEvaluator;
using OpenSubdiv::Osd::GLStencilTableTBO;
using OpenSubdiv::Osd::GLVertexBuffer;
typedef Mesh<GLVertexBuffer,
GLStencilTableTBO,
GLXFBEvaluator,
GLPatchTable> OsdGLSLTransformFeedbackMesh;
#endif /* OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK */
#ifdef OPENSUBDIV_HAS_GLSL_COMPUTE
using OpenSubdiv::Osd::GLComputeEvaluator;
using OpenSubdiv::Osd::GLStencilTableSSBO;
using OpenSubdiv::Osd::GLVertexBuffer;
typedef Mesh<GLVertexBuffer,
GLStencilTableSSBO,
GLComputeEvaluator,
GLPatchTable> OsdGLSLComputeMesh;
#endif
namespace {
#if !defined(OPENSUBDIV_VERSION_NUMBER) && !defined(OPENSUBDIV_VERSION_MINOR)
void stringSplit(vector<string>* tokens,
const string& str,
const string& separators,
bool skip_empty) {
size_t token_start = 0, token_length = 0;
for (size_t i = 0; i < str.length(); ++i) {
const char ch = str[i];
if (separators.find(ch) == string::npos) {
/* Append non-separator char to a token. */
++token_length;
} else {
/* Append current token to the list (if any). */
if (token_length > 0 || !skip_empty) {
string token = str.substr(token_start, token_length);
tokens->push_back(token);
}
/* Re-set token pointers, */
token_start = i + 1;
token_length = 0;
}
}
/* Append token which might be at the end of the string. */
if ((token_length != 0) ||
(!skip_empty && token_start > 0 &&
separators.find(str[token_start-1]) != string::npos)) {
string token = str.substr(token_start, token_length);
tokens->push_back(token);
}
}
#endif
struct FVarVertex {
float u, v;
void Clear() {
u = v = 0.0f;
}
void AddWithWeight(FVarVertex const & src, float weight) {
u += weight * src.u;
v += weight * src.v;
}
};
static void interpolate_fvar_data(OpenSubdiv::Far::TopologyRefiner& refiner,
const std::vector<float> uvs,
std::vector<float> &fvar_data) {
/* TODO(sergey): Make it somehow more generic way. */
const int fvar_width = 2;
const int max_level = refiner.GetMaxLevel();
size_t fvar_data_offset = 0, values_offset = 0;
for (int channel = 0; channel < refiner.GetNumFVarChannels(); ++channel) {
const int num_values = refiner.GetLevel(0).GetNumFVarValues(channel) * 2,
num_values_max = refiner.GetLevel(max_level).GetNumFVarValues(channel),
num_values_total = refiner.GetNumFVarValuesTotal(channel);
if (num_values_total <= 0) {
continue;
}
OpenSubdiv::Far::PrimvarRefiner primvar_refiner(refiner);
if (refiner.IsUniform()) {
/* For uniform we only keep the highest level of refinement. */
fvar_data.resize(fvar_data.size() + num_values_max * fvar_width);
std::vector<FVarVertex> buffer(num_values_total - num_values_max);
FVarVertex *src = &buffer[0];
memcpy(src, &uvs[values_offset], num_values * sizeof(float));
/* Defer the last level to treat separately with its alternate
* destination.
*/
for (int level = 1; level < max_level; ++level) {
FVarVertex *dst = src + refiner.GetLevel(level-1).GetNumFVarValues(channel);
primvar_refiner.InterpolateFaceVarying(level, src, dst, channel);
src = dst;
}
FVarVertex *dst = reinterpret_cast<FVarVertex *>(&fvar_data[fvar_data_offset]);
primvar_refiner.InterpolateFaceVarying(max_level, src, dst, channel);
fvar_data_offset += num_values_max * fvar_width;
} else {
/* For adaptive we keep all levels. */
fvar_data.resize(fvar_data.size() + num_values_total * fvar_width);
FVarVertex *src = reinterpret_cast<FVarVertex *>(&fvar_data[fvar_data_offset]);
memcpy(src, &uvs[values_offset], num_values * sizeof(float));
for (int level = 1; level <= max_level; ++level) {
FVarVertex *dst = src + refiner.GetLevel(level-1).GetNumFVarValues(channel);
primvar_refiner.InterpolateFaceVarying(level, src, dst, channel);
src = dst;
}
fvar_data_offset += num_values_total * fvar_width;
}
values_offset += num_values;
}
}
} // namespace
struct OpenSubdiv_GLMesh *openSubdiv_createOsdGLMeshFromTopologyRefiner(
OpenSubdiv_TopologyRefinerDescr *topology_refiner,
int evaluator_type,
int level)
{
using OpenSubdiv::Far::TopologyRefiner;
MeshBitset bits;
/* TODO(sergey): Adaptive subdivisions are not currently
* possible because of the lack of tessellation shader.
*/
bits.set(OpenSubdiv::Osd::MeshAdaptive, 0);
bits.set(OpenSubdiv::Osd::MeshUseSingleCreasePatch, 0);
bits.set(OpenSubdiv::Osd::MeshInterleaveVarying, 1);
bits.set(OpenSubdiv::Osd::MeshFVarData, 1);
bits.set(OpenSubdiv::Osd::MeshEndCapBSplineBasis, 1);
const int num_vertex_elements = 3;
const int num_varying_elements = 3;
GLMeshInterface *mesh = NULL;
TopologyRefiner *refiner = topology_refiner->osd_refiner;
switch(evaluator_type) {
#define CHECK_EVALUATOR_TYPE(type, class) \
case OPENSUBDIV_EVALUATOR_ ## type: \
mesh = new class(refiner, \
num_vertex_elements, \
num_varying_elements, \
level, \
bits); \
break;
CHECK_EVALUATOR_TYPE(CPU, OsdCpuMesh)
#ifdef OPENSUBDIV_HAS_OPENMP
CHECK_EVALUATOR_TYPE(OPENMP, OsdOmpMesh)
#endif
#ifdef OPENSUBDIV_HAS_OPENCL
CHECK_EVALUATOR_TYPE(OPENCL, OsdCLMesh)
#endif
#ifdef OPENSUBDIV_HAS_CUDA
CHECK_EVALUATOR_TYPE(CUDA, OsdCudaMesh)
#endif
#ifdef OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK
CHECK_EVALUATOR_TYPE(GLSL_TRANSFORM_FEEDBACK,
OsdGLSLTransformFeedbackMesh)
#endif
#ifdef OPENSUBDIV_HAS_GLSL_COMPUTE
CHECK_EVALUATOR_TYPE(GLSL_COMPUTE, OsdGLSLComputeMesh)
#endif
#undef CHECK_EVALUATOR_TYPE
}
if (mesh == NULL) {
return NULL;
}
OpenSubdiv_GLMesh *gl_mesh =
(OpenSubdiv_GLMesh *) OBJECT_GUARDED_NEW(OpenSubdiv_GLMesh);
gl_mesh->evaluator_type = evaluator_type;
gl_mesh->descriptor = (OpenSubdiv_GLMeshDescr *) mesh;
gl_mesh->topology_refiner = topology_refiner;
if (refiner->GetNumFVarChannels() > 0) {
std::vector<float> fvar_data;
interpolate_fvar_data(*refiner, topology_refiner->uvs, fvar_data);
openSubdiv_osdGLAllocFVar(topology_refiner, gl_mesh, &fvar_data[0]);
}
else {
gl_mesh->fvar_data = NULL;
}
return gl_mesh;
}
void openSubdiv_deleteOsdGLMesh(struct OpenSubdiv_GLMesh *gl_mesh)
{
openSubdiv_osdGLDestroyFVar(gl_mesh);
switch (gl_mesh->evaluator_type) {
#define CHECK_EVALUATOR_TYPE(type, class) \
case OPENSUBDIV_EVALUATOR_ ## type: \
delete (class *) gl_mesh->descriptor; \
break;
CHECK_EVALUATOR_TYPE(CPU, OsdCpuMesh)
#ifdef OPENSUBDIV_HAS_OPENMP
CHECK_EVALUATOR_TYPE(OPENMP, OsdOmpMesh)
#endif
#ifdef OPENSUBDIV_HAS_OPENCL
CHECK_EVALUATOR_TYPE(OPENCL, OsdCLMesh)
#endif
#ifdef OPENSUBDIV_HAS_CUDA
CHECK_EVALUATOR_TYPE(CUDA, OsdCudaMesh)
#endif
#ifdef OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK
CHECK_EVALUATOR_TYPE(GLSL_TRANSFORM_FEEDBACK,
OsdGLSLTransformFeedbackMesh)
#endif
#ifdef OPENSUBDIV_HAS_GLSL_COMPUTE
CHECK_EVALUATOR_TYPE(GLSL_COMPUTE, OsdGLSLComputeMesh)
#endif
#undef CHECK_EVALUATOR_TYPE
}
/* NOTE: OSD refiner was owned by gl_mesh, no need to free it here. */
OBJECT_GUARDED_DELETE(gl_mesh->topology_refiner, OpenSubdiv_TopologyRefinerDescr);
OBJECT_GUARDED_DELETE(gl_mesh, OpenSubdiv_GLMesh);
}
unsigned int openSubdiv_getOsdGLMeshPatchIndexBuffer(struct OpenSubdiv_GLMesh *gl_mesh)
{
return ((GLMeshInterface *)gl_mesh->descriptor)->GetPatchTable()->GetPatchIndexBuffer();
}
unsigned int openSubdiv_getOsdGLMeshVertexBuffer(struct OpenSubdiv_GLMesh *gl_mesh)
{
return ((GLMeshInterface *)gl_mesh->descriptor)->BindVertexBuffer();
}
void openSubdiv_osdGLMeshUpdateVertexBuffer(struct OpenSubdiv_GLMesh *gl_mesh,
const float *vertex_data,
int start_vertex,
int num_verts)
{
((GLMeshInterface *)gl_mesh->descriptor)->UpdateVertexBuffer(vertex_data,
start_vertex,
num_verts);
}
void openSubdiv_osdGLMeshRefine(struct OpenSubdiv_GLMesh *gl_mesh)
{
((GLMeshInterface *)gl_mesh->descriptor)->Refine();
}
void openSubdiv_osdGLMeshSynchronize(struct OpenSubdiv_GLMesh *gl_mesh)
{
((GLMeshInterface *)gl_mesh->descriptor)->Synchronize();
}
void openSubdiv_osdGLMeshBindVertexBuffer(OpenSubdiv_GLMesh *gl_mesh)
{
((GLMeshInterface *)gl_mesh->descriptor)->BindVertexBuffer();
}
const struct OpenSubdiv_TopologyRefinerDescr *openSubdiv_getGLMeshTopologyRefiner(
OpenSubdiv_GLMesh *gl_mesh)
{
return gl_mesh->topology_refiner;
}
int openSubdiv_supportGPUDisplay(void)
{
// TODO: simplify extension check once Blender adopts GL 3.2
return openSubdiv_gpu_legacy_support() &&
(GLEW_VERSION_3_2 ||
(GLEW_VERSION_3_1 && GLEW_EXT_geometry_shader4) ||
(GLEW_VERSION_3_0 &&
GLEW_EXT_geometry_shader4 &&
GLEW_ARB_uniform_buffer_object &&
(GLEW_ARB_texture_buffer_object || GLEW_EXT_texture_buffer_object)));
/* also ARB_explicit_attrib_location? */
}
int openSubdiv_getVersionHex(void)
{
#if defined(OPENSUBDIV_VERSION_NUMBER)
return OPENSUBDIV_VERSION_NUMBER;
#elif defined(OPENSUBDIV_VERSION_MAJOR)
return OPENSUBDIV_VERSION_MAJOR * 10000 +
OPENSUBDIV_VERSION_MINOR * 100 +
OPENSUBDIV_VERSION_PATCH;
#elif defined(OPENSUBDIV_VERSION)
const char* version = STRINGIFY(OPENSUBDIV_VERSION);
if (version[0] == 'v') {
version += 1;
}
int major = 0, minor = 0, patch = 0;
vector<string> tokens;
stringSplit(&tokens, version, "_", true);
if (tokens.size() == 3) {
major = atoi(tokens[0].c_str());
minor = atoi(tokens[1].c_str());
patch = atoi(tokens[2].c_str());
}
return major * 10000 + minor * 100 + patch;
#else
return 0;
#endif
}
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