137 lines
No EOL
4.3 KiB
C++
137 lines
No EOL
4.3 KiB
C++
#ifdef __cplusplus
|
|
extern "C"
|
|
{
|
|
#endif
|
|
#include <stddef.h>
|
|
|
|
//I fucking hate c++
|
|
typedef struct ftedracofuncs_s
|
|
{
|
|
void (*Release)(struct ftedracofuncs_s *ctx); //frees all memory
|
|
|
|
struct ftedracoattr_s
|
|
{
|
|
void *ptr;
|
|
int isnormalised;
|
|
unsigned int type; //gl constants, because why not
|
|
unsigned int components; //1-4
|
|
unsigned int bytestride;
|
|
unsigned int usage; //typical usage type.
|
|
unsigned int uniqueid; //annoying extra lookup.
|
|
} *attrib;
|
|
unsigned int num_attribs;
|
|
|
|
//mesh data
|
|
char triangleloop;
|
|
unsigned int num_indexes;
|
|
unsigned int *ptr_indexes, num_vertexes;
|
|
} ftedracofuncs_t;
|
|
|
|
ftedracofuncs_t *Draco_Decode(void *ptr, size_t size);
|
|
|
|
#ifdef __cplusplus
|
|
};
|
|
#endif
|
|
|
|
#if !defined(DRACO_API_ONLY) && defined(HAVE_DRACO)
|
|
#include <draco/compression/decode.h>
|
|
|
|
struct dracofuncs_t : public ftedracofuncs_s
|
|
{
|
|
draco::Decoder decoder;
|
|
draco::DecoderBuffer buffer;
|
|
draco::Mesh mesh;
|
|
|
|
static void DoRelease(ftedracofuncs_s *ctx)
|
|
{
|
|
auto d = reinterpret_cast<dracofuncs_t*>(ctx);
|
|
delete[] d->ptr_indexes;
|
|
for (auto i = d->num_attribs; i --> 0; )
|
|
delete[] (char*)d->attrib[i].ptr;
|
|
delete[] d->attrib;
|
|
delete d; //do all the third-party destructor stuff too.
|
|
}
|
|
dracofuncs_t()
|
|
{
|
|
Release = DoRelease;
|
|
}
|
|
};
|
|
template <class attrtype, int gltype>
|
|
static void CopyAttribute(unsigned int numpoints, draco::PointAttribute *attr, ftedracofuncs_s::ftedracoattr_s *oattr)
|
|
{
|
|
auto nc = oattr->components;
|
|
auto *out = new attrtype[numpoints*nc];
|
|
for (size_t i = 0; i < numpoints; i++)
|
|
attr->GetMappedValue(draco::PointIndex(i), &out[i*nc]);
|
|
|
|
oattr->bytestride = sizeof(attrtype)*nc; //the output data is tightly packed.
|
|
oattr->ptr = out;
|
|
oattr->type = gltype;
|
|
};
|
|
ftedracofuncs_t *Draco_Decode(void *ptr, size_t size)
|
|
{
|
|
size_t tris;
|
|
dracofuncs_t *d = new dracofuncs_t();
|
|
|
|
d->buffer.Init((const char *)ptr, size);
|
|
if (!d->decoder.DecodeBufferToGeometry(&d->buffer, &d->mesh).ok())
|
|
{ //check for corruption...
|
|
delete d;
|
|
return NULL;
|
|
}
|
|
|
|
tris = d->mesh.num_faces();
|
|
d->num_indexes = tris*3;
|
|
d->ptr_indexes = new unsigned int[d->num_indexes];
|
|
while (tris --> 0)
|
|
{
|
|
auto &tri = d->mesh.face(draco::FaceIndex(tris));
|
|
d->ptr_indexes[tris*3+0] = tri[0].value();
|
|
d->ptr_indexes[tris*3+1] = tri[1].value();
|
|
d->ptr_indexes[tris*3+2] = tri[2].value();
|
|
}
|
|
|
|
d->num_vertexes = d->mesh.num_points();
|
|
d->num_attribs = d->mesh.num_attributes();
|
|
d->attrib = new struct ftedracofuncs_s::ftedracoattr_s[d->num_attribs];
|
|
for (unsigned int i = 0; i < d->num_attribs; i++)
|
|
{
|
|
draco::PointAttribute *attr = d->mesh.attribute(i);
|
|
auto oattr = &d->attrib[i];
|
|
oattr->isnormalised = attr->normalized();
|
|
oattr->bytestride = attr->byte_stride();
|
|
oattr->components = attr->num_components();
|
|
oattr->usage = attr->attribute_type();
|
|
oattr->uniqueid = attr->unique_id();
|
|
#define GL_BYTE 0x1400
|
|
#define GL_UNSIGNED_BYTE 0x1401
|
|
#define GL_SHORT 0x1402
|
|
#define GL_UNSIGNED_SHORT 0x1403
|
|
#define GL_INT 0x1404
|
|
#define GL_UNSIGNED_INT 0x1405
|
|
#define GL_FLOAT 0x1406
|
|
#define GL_DOUBLE 0x140A
|
|
#define GL_INT64_ARB 0x140E
|
|
#define GL_UNSIGNED_INT64_ARB 0x140F
|
|
|
|
switch(attr->data_type())
|
|
{
|
|
default:
|
|
memset(oattr, 0, sizeof(*oattr));
|
|
break;
|
|
case draco::DataType::DT_INT8: CopyAttribute< int8_t, GL_BYTE >(d->num_vertexes, attr, oattr); break;
|
|
case draco::DataType::DT_UINT8: CopyAttribute<uint8_t, GL_UNSIGNED_BYTE >(d->num_vertexes, attr, oattr); break;
|
|
case draco::DataType::DT_INT16: CopyAttribute< int16_t, GL_SHORT >(d->num_vertexes, attr, oattr); break;
|
|
case draco::DataType::DT_UINT16: CopyAttribute<uint16_t, GL_UNSIGNED_SHORT >(d->num_vertexes, attr, oattr); break;
|
|
case draco::DataType::DT_INT32: CopyAttribute< int32_t, GL_INT >(d->num_vertexes, attr, oattr); break;
|
|
case draco::DataType::DT_UINT32: CopyAttribute<uint32_t, GL_UNSIGNED_INT >(d->num_vertexes, attr, oattr); break;
|
|
case draco::DataType::DT_INT64: CopyAttribute< int64_t, GL_INT64_ARB >(d->num_vertexes, attr, oattr); break;
|
|
case draco::DataType::DT_UINT64: CopyAttribute<uint64_t, GL_UNSIGNED_INT64_ARB >(d->num_vertexes, attr, oattr); break;
|
|
case draco::DataType::DT_FLOAT32: CopyAttribute<float, GL_FLOAT >(d->num_vertexes, attr, oattr); break;
|
|
case draco::DataType::DT_FLOAT64: CopyAttribute<double, GL_DOUBLE >(d->num_vertexes, attr, oattr); break;
|
|
}
|
|
}
|
|
return d;
|
|
}
|
|
|
|
#endif |