in modules/core/src/matrix.cpp [2207:2498]
void _OutputArray::create(int d, const int* sizes, int mtype, int i,
bool allowTransposed, int fixedDepthMask) const
{
int k = kind();
mtype = CV_MAT_TYPE(mtype);
if( k == MAT )
{
CV_Assert( i < 0 );
Mat& m = *(Mat*)obj;
if( allowTransposed )
{
if( !m.isContinuous() )
{
CV_Assert(!fixedType() && !fixedSize());
m.release();
}
if( d == 2 && m.dims == 2 && m.data &&
m.type() == mtype && m.rows == sizes[1] && m.cols == sizes[0] )
return;
}
if(fixedType())
{
if(CV_MAT_CN(mtype) == m.channels() && ((1 << CV_MAT_TYPE(flags)) & fixedDepthMask) != 0 )
mtype = m.type();
else
CV_Assert(CV_MAT_TYPE(mtype) == m.type());
}
if(fixedSize())
{
CV_Assert(m.dims == d);
for(int j = 0; j < d; ++j)
CV_Assert(m.size[j] == sizes[j]);
}
m.create(d, sizes, mtype);
return;
}
if( k == UMAT )
{
CV_Assert( i < 0 );
UMat& m = *(UMat*)obj;
if( allowTransposed )
{
if( !m.isContinuous() )
{
CV_Assert(!fixedType() && !fixedSize());
m.release();
}
if( d == 2 && m.dims == 2 && !m.empty() &&
m.type() == mtype && m.rows == sizes[1] && m.cols == sizes[0] )
return;
}
if(fixedType())
{
if(CV_MAT_CN(mtype) == m.channels() && ((1 << CV_MAT_TYPE(flags)) & fixedDepthMask) != 0 )
mtype = m.type();
else
CV_Assert(CV_MAT_TYPE(mtype) == m.type());
}
if(fixedSize())
{
CV_Assert(m.dims == d);
for(int j = 0; j < d; ++j)
CV_Assert(m.size[j] == sizes[j]);
}
m.create(d, sizes, mtype);
return;
}
if( k == MATX )
{
CV_Assert( i < 0 );
int type0 = CV_MAT_TYPE(flags);
CV_Assert( mtype == type0 || (CV_MAT_CN(mtype) == 1 && ((1 << type0) & fixedDepthMask) != 0) );
CV_Assert( d == 2 && ((sizes[0] == sz.height && sizes[1] == sz.width) ||
(allowTransposed && sizes[0] == sz.width && sizes[1] == sz.height)));
return;
}
if( k == STD_VECTOR || k == STD_VECTOR_VECTOR )
{
CV_Assert( d == 2 && (sizes[0] == 1 || sizes[1] == 1 || sizes[0]*sizes[1] == 0) );
size_t len = sizes[0]*sizes[1] > 0 ? sizes[0] + sizes[1] - 1 : 0;
std::vector<uchar>* v = (std::vector<uchar>*)obj;
if( k == STD_VECTOR_VECTOR )
{
std::vector<std::vector<uchar> >& vv = *(std::vector<std::vector<uchar> >*)obj;
if( i < 0 )
{
CV_Assert(!fixedSize() || len == vv.size());
vv.resize(len);
return;
}
CV_Assert( i < (int)vv.size() );
v = &vv[i];
}
else
CV_Assert( i < 0 );
int type0 = CV_MAT_TYPE(flags);
CV_Assert( mtype == type0 || (CV_MAT_CN(mtype) == CV_MAT_CN(type0) && ((1 << type0) & fixedDepthMask) != 0) );
int esz = CV_ELEM_SIZE(type0);
CV_Assert(!fixedSize() || len == ((std::vector<uchar>*)v)->size() / esz);
switch( esz )
{
case 1:
((std::vector<uchar>*)v)->resize(len);
break;
case 2:
((std::vector<Vec2b>*)v)->resize(len);
break;
case 3:
((std::vector<Vec3b>*)v)->resize(len);
break;
case 4:
((std::vector<int>*)v)->resize(len);
break;
case 6:
((std::vector<Vec3s>*)v)->resize(len);
break;
case 8:
((std::vector<Vec2i>*)v)->resize(len);
break;
case 12:
((std::vector<Vec3i>*)v)->resize(len);
break;
case 16:
((std::vector<Vec4i>*)v)->resize(len);
break;
case 24:
((std::vector<Vec6i>*)v)->resize(len);
break;
case 32:
((std::vector<Vec8i>*)v)->resize(len);
break;
case 36:
((std::vector<Vec<int, 9> >*)v)->resize(len);
break;
case 48:
((std::vector<Vec<int, 12> >*)v)->resize(len);
break;
case 64:
((std::vector<Vec<int, 16> >*)v)->resize(len);
break;
case 128:
((std::vector<Vec<int, 32> >*)v)->resize(len);
break;
case 256:
((std::vector<Vec<int, 64> >*)v)->resize(len);
break;
case 512:
((std::vector<Vec<int, 128> >*)v)->resize(len);
break;
default:
CV_Error_(CV_StsBadArg, ("Vectors with element size %d are not supported. Please, modify OutputArray::create()\n", esz));
}
return;
}
if( k == NONE )
{
CV_Error(CV_StsNullPtr, "create() called for the missing output array" );
return;
}
if( k == STD_VECTOR_MAT )
{
std::vector<Mat>& v = *(std::vector<Mat>*)obj;
if( i < 0 )
{
CV_Assert( d == 2 && (sizes[0] == 1 || sizes[1] == 1 || sizes[0]*sizes[1] == 0) );
size_t len = sizes[0]*sizes[1] > 0 ? sizes[0] + sizes[1] - 1 : 0, len0 = v.size();
CV_Assert(!fixedSize() || len == len0);
v.resize(len);
if( fixedType() )
{
int _type = CV_MAT_TYPE(flags);
for( size_t j = len0; j < len; j++ )
{
if( v[j].type() == _type )
continue;
CV_Assert( v[j].empty() );
v[j].flags = (v[j].flags & ~CV_MAT_TYPE_MASK) | _type;
}
}
return;
}
CV_Assert( i < (int)v.size() );
Mat& m = v[i];
if( allowTransposed )
{
if( !m.isContinuous() )
{
CV_Assert(!fixedType() && !fixedSize());
m.release();
}
if( d == 2 && m.dims == 2 && m.data &&
m.type() == mtype && m.rows == sizes[1] && m.cols == sizes[0] )
return;
}
if(fixedType())
{
if(CV_MAT_CN(mtype) == m.channels() && ((1 << CV_MAT_TYPE(flags)) & fixedDepthMask) != 0 )
mtype = m.type();
else
CV_Assert(CV_MAT_TYPE(mtype) == m.type());
}
if(fixedSize())
{
CV_Assert(m.dims == d);
for(int j = 0; j < d; ++j)
CV_Assert(m.size[j] == sizes[j]);
}
m.create(d, sizes, mtype);
return;
}
if( k == STD_VECTOR_UMAT )
{
std::vector<UMat>& v = *(std::vector<UMat>*)obj;
if( i < 0 )
{
CV_Assert( d == 2 && (sizes[0] == 1 || sizes[1] == 1 || sizes[0]*sizes[1] == 0) );
size_t len = sizes[0]*sizes[1] > 0 ? sizes[0] + sizes[1] - 1 : 0, len0 = v.size();
CV_Assert(!fixedSize() || len == len0);
v.resize(len);
if( fixedType() )
{
int _type = CV_MAT_TYPE(flags);
for( size_t j = len0; j < len; j++ )
{
if( v[j].type() == _type )
continue;
CV_Assert( v[j].empty() );
v[j].flags = (v[j].flags & ~CV_MAT_TYPE_MASK) | _type;
}
}
return;
}
CV_Assert( i < (int)v.size() );
UMat& m = v[i];
if( allowTransposed )
{
if( !m.isContinuous() )
{
CV_Assert(!fixedType() && !fixedSize());
m.release();
}
if( d == 2 && m.dims == 2 && m.u &&
m.type() == mtype && m.rows == sizes[1] && m.cols == sizes[0] )
return;
}
if(fixedType())
{
if(CV_MAT_CN(mtype) == m.channels() && ((1 << CV_MAT_TYPE(flags)) & fixedDepthMask) != 0 )
mtype = m.type();
else
CV_Assert(CV_MAT_TYPE(mtype) == m.type());
}
if(fixedSize())
{
CV_Assert(m.dims == d);
for(int j = 0; j < d; ++j)
CV_Assert(m.size[j] == sizes[j]);
}
m.create(d, sizes, mtype);
return;
}
CV_Error(Error::StsNotImplemented, "Unknown/unsupported array type");
}