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// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
// Copyright 2008-2016 National ICT Australia (NICTA)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------
//! \addtogroup op_repmat
//! @{
template<typename obj>
inline
void
op_repmat::apply_noalias(Mat<typename obj::elem_type>& out, const obj& X, const uword copies_per_row, const uword copies_per_col)
{
arma_extra_debug_sigprint();
typedef typename obj::elem_type eT;
const uword X_n_rows = obj::is_row ? uword(1) : X.n_rows;
const uword X_n_cols = obj::is_col ? uword(1) : X.n_cols;
out.set_size(X_n_rows * copies_per_row, X_n_cols * copies_per_col);
const uword out_n_rows = out.n_rows;
const uword out_n_cols = out.n_cols;
// if( (out_n_rows > 0) && (out_n_cols > 0) )
// {
// for(uword col = 0; col < out_n_cols; col += X_n_cols)
// for(uword row = 0; row < out_n_rows; row += X_n_rows)
// {
// out.submat(row, col, row+X_n_rows-1, col+X_n_cols-1) = X;
// }
// }
if( (out_n_rows > 0) && (out_n_cols > 0) )
{
if(copies_per_row != 1)
{
for(uword col_copy=0; col_copy < copies_per_col; ++col_copy)
{
const uword out_col_offset = X_n_cols * col_copy;
for(uword col=0; col < X_n_cols; ++col)
{
eT* out_colptr = out.colptr(col + out_col_offset);
const eT* X_colptr = X.colptr(col);
for(uword row_copy=0; row_copy < copies_per_row; ++row_copy)
{
const uword out_row_offset = X_n_rows * row_copy;
arrayops::copy( &out_colptr[out_row_offset], X_colptr, X_n_rows );
}
}
}
}
else
{
for(uword col_copy=0; col_copy < copies_per_col; ++col_copy)
{
const uword out_col_offset = X_n_cols * col_copy;
for(uword col=0; col < X_n_cols; ++col)
{
eT* out_colptr = out.colptr(col + out_col_offset);
const eT* X_colptr = X.colptr(col);
arrayops::copy( out_colptr, X_colptr, X_n_rows );
}
}
}
}
}
template<typename T1>
inline
void
op_repmat::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_repmat>& in)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const uword copies_per_row = in.aux_uword_a;
const uword copies_per_col = in.aux_uword_b;
const quasi_unwrap<T1> U(in.m);
if(U.is_alias(out))
{
Mat<eT> tmp;
op_repmat::apply_noalias(tmp, U.M, copies_per_row, copies_per_col);
out.steal_mem(tmp);
}
else
{
op_repmat::apply_noalias(out, U.M, copies_per_row, copies_per_col);
}
}
//! @}
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