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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_resize
//! @{
template<typename T1>
inline
void
op_resize::apply(Mat<typename T1::elem_type>& actual_out, const Op<T1,op_resize>& in)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const uword out_n_rows = in.aux_uword_a;
const uword out_n_cols = in.aux_uword_b;
const unwrap<T1> tmp(in.m);
const Mat<eT>& A = tmp.M;
const uword A_n_rows = A.n_rows;
const uword A_n_cols = A.n_cols;
const bool alias = (&actual_out == &A);
if(alias)
{
if( (A_n_rows == out_n_rows) && (A_n_cols == out_n_cols) )
{
return;
}
if(actual_out.is_empty())
{
actual_out.zeros(out_n_rows, out_n_cols);
return;
}
}
Mat<eT> B;
Mat<eT>& out = alias ? B : actual_out;
out.set_size(out_n_rows, out_n_cols);
if( (out_n_rows > A_n_rows) || (out_n_cols > A_n_cols) )
{
out.zeros();
}
if( (out.n_elem > 0) && (A.n_elem > 0) )
{
const uword end_row = (std::min)(out_n_rows, A_n_rows) - 1;
const uword end_col = (std::min)(out_n_cols, A_n_cols) - 1;
out.submat(0, 0, end_row, end_col) = A.submat(0, 0, end_row, end_col);
}
if(alias)
{
actual_out.steal_mem(B);
}
}
template<typename T1>
inline
void
op_resize::apply(Cube<typename T1::elem_type>& actual_out, const OpCube<T1,op_resize>& in)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const uword out_n_rows = in.aux_uword_a;
const uword out_n_cols = in.aux_uword_b;
const uword out_n_slices = in.aux_uword_c;
const unwrap_cube<T1> tmp(in.m);
const Cube<eT>& A = tmp.M;
const uword A_n_rows = A.n_rows;
const uword A_n_cols = A.n_cols;
const uword A_n_slices = A.n_slices;
const bool alias = (&actual_out == &A);
if(alias)
{
if( (A_n_rows == out_n_rows) && (A_n_cols == out_n_cols) && (A_n_slices == out_n_slices) )
{
return;
}
if(actual_out.is_empty())
{
actual_out.zeros(out_n_rows, out_n_cols, out_n_slices);
return;
}
}
Cube<eT> B;
Cube<eT>& out = alias ? B : actual_out;
out.set_size(out_n_rows, out_n_cols, out_n_slices);
if( (out_n_rows > A_n_rows) || (out_n_cols > A_n_cols) || (out_n_slices > A_n_slices) )
{
out.zeros();
}
if( (out.n_elem > 0) && (A.n_elem > 0) )
{
const uword end_row = (std::min)(out_n_rows, A_n_rows) - 1;
const uword end_col = (std::min)(out_n_cols, A_n_cols) - 1;
const uword end_slice = (std::min)(out_n_slices, A_n_slices) - 1;
out.subcube(0, 0, 0, end_row, end_col, end_slice) = A.subcube(0, 0, 0, end_row, end_col, end_slice);
}
if(alias)
{
actual_out.steal_mem(B);
}
}
//! @}
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