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/*
* Copyright (c) 2023 Arm Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef CKW_SRC_TILEVIEW_H
#define CKW_SRC_TILEVIEW_H
#include "ckw/Error.h"
#include "ckw/types/DataType.h"
#include "src/ITile.h"
#include <cstdint>
namespace ckw
{
/** A rectangular active area of a tile. */
class TileArea
{
public:
/** Create a new tile rectangular active area.
*
* The range of rows and columns is defined by pairs of start and end indices, inclusive lower and exclusive upper.
* In other word, any row and column indices satisfied the following conditions will be part of the active area:
*
* row_start <= row_index < row_end
* col_start <= col_index < col_end
*
* @param[in] row_start The start index of the row range.
* @param[in] row_end The end index of the row range.
* @param[in] col_start The start index of the column range.
* @param[in] col_end The end index of the column range.
*/
TileArea(int32_t row_start, int32_t row_end, int32_t col_start, int32_t col_end);
/** Get the start row index. */
int32_t row_start() const;
/** Get the end row (exclusive) index. */
int32_t row_end() const;
/** Get the start column index. */
int32_t col_start() const;
/** Get the end column (exclusive) index. */
int32_t col_end() const;
private:
int32_t _row_start;
int32_t _row_end;
int32_t _col_start;
int32_t _col_end;
};
/** A rectangular view of a tile. */
template <typename T>
class TileView
{
public:
/** Default constructor */
TileView() : _tile(nullptr), _area(0, 0, 0, 0)
{
}
/** Create a tile view that refers to the whole tile.
*
* @param[in] tile The tile object.
*/
TileView(const T &tile) : _tile(&tile), _area(0, tile.info().height(), 0, tile.info().width())
{
}
/** Create a new rectangular view of the given tile.
*
* @param[in] tile The tile object.
* @param[in] area The rectangular active area.
*/
TileView(const T &tile, const TileArea &area) : _tile(&tile), _area(area)
{
}
/** Get the tile object.
*
* The caller must guarantee that the tile view refers to the whole tile.
*/
const T &full_tile() const
{
CKW_ASSERT(is_full_tile());
return *_tile;
}
/** Get the data type of the tile. */
DataType data_type() const
{
return _tile->info().data_type();
}
/** Get the start row index. */
int32_t row_start() const
{
return _area.row_start();
}
/** Get the end row index. */
int32_t row_end() const
{
return _area.row_end();
}
/** Get the start column index. */
int32_t col_start() const
{
return _area.col_start();
}
/** Get the end column index. */
int32_t col_end() const
{
return _area.col_end();
}
/** Get the height of the tile view. */
int32_t height() const
{
return _area.row_end() - _area.row_start();
}
/** Get the width of the tile view. */
int32_t width() const
{
return _area.col_end() - _area.col_start();
}
/** See @ref IVectorAccess::vector. */
TileVariable vector(int32_t row) const
{
return _tile->vector(row_start() + row, col_start(), width());
}
/** See @ref IScalarAccess::scalar. */
TileVariable scalar(int32_t row, int32_t col) const
{
return _tile->scalar(row_start() + row, col_start() + col);
}
/** Get the name of the tile. */
const std::string &name() const
{
return _tile->name();
}
/** Get whether the tile view is a scalar element. */
bool is_scalar() const
{
return height() == 1 && width() == 1;
}
/** Get whether the tile view refers to the whole tile. */
bool is_full_tile() const
{
return row_start() == 0 && row_end() == _tile->info().height() && col_start() == 0 &&
col_end() == _tile->info().width();
}
/** Set the rectangular active area.
*
* @param[in] area The rectangular active area.
*/
TileView &area(const TileArea &area)
{
_area = area;
return *this;
}
/** Get the tile area */
TileArea area() const
{
return _area;
}
private:
const T *_tile;
TileArea _area;
};
} // namespace ckw
#endif // CKW_SRC_TILEVIEW_H
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