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42e8de3b52
This is a rather trivial changeset. Now that these two are present in the `std` namespace there's no reason for us to continue using the `gsl` ones. Additionally this ensures future compatibility with other 3rd party libraries.
96 lines
3.0 KiB
C++
96 lines
3.0 KiB
C++
// Copyright (c) Microsoft Corporation.
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// Licensed under the MIT license.
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#include "precomp.h"
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#include "OutputCellRect.hpp"
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// Routine Description:
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// - Constructs an empty in-memory region for holding output buffer cell data.
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OutputCellRect::OutputCellRect() noexcept :
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_rows(0),
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_cols(0)
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{
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}
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// Routine Description:
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// - Constructs an in-memory region for holding a copy of output buffer cell data.
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// - NOTE: This creatively skips the constructors for every cell. You must fill
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// every single cell in this rectangle before iterating/reading for it to be valid.
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// - NOTE: This is designed for perf-sensitive paths ONLY. Take care.
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// Arguments:
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// - rows - Rows in the rectangle (height)
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// - cols - Columns in the rectangle (width)
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OutputCellRect::OutputCellRect(const til::CoordType rows, const til::CoordType cols) :
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_rows(rows),
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_cols(cols)
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{
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_storage.resize(gsl::narrow<size_t>(rows * cols));
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}
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// Routine Description:
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// - Gets a read/write span over a single row inside the rectangle.
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// Arguments:
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// - row - The Y position or row index in the buffer.
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// Return Value:
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// - Read/write span of OutputCells
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std::span<OutputCell> OutputCellRect::GetRow(const til::CoordType row)
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{
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return std::span<OutputCell>(_FindRowOffset(row), _cols);
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}
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// Routine Description:
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// - Gets a read-only iterator view over a single row of the rectangle.
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// Arguments:
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// - row - The Y position or row index in the buffer.
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// Return Value:
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// - Read-only iterator of OutputCells
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OutputCellIterator OutputCellRect::GetRowIter(const til::CoordType row) const
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{
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const std::span<const OutputCell> view(_FindRowOffset(row), _cols);
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return OutputCellIterator(view);
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}
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// Routine Description:
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// - Internal helper to find the pointer to the specific row offset in the giant
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// contiguous block of memory allocated for this rectangle.
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// Arguments:
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// - row - The Y position or row index in the buffer.
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// Return Value:
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// - Pointer to the location in the rectangle that represents the start of the requested row.
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OutputCell* OutputCellRect::_FindRowOffset(const til::CoordType row)
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{
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return &_storage.at(gsl::narrow_cast<size_t>(row * _cols));
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}
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// Routine Description:
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// - Internal helper to find the pointer to the specific row offset in the giant
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// contiguous block of memory allocated for this rectangle.
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// Arguments:
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// - row - The Y position or row index in the buffer.
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// Return Value:
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// - Pointer to the location in the rectangle that represents the start of the requested row.
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const OutputCell* OutputCellRect::_FindRowOffset(const til::CoordType row) const
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{
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return &_storage.at(gsl::narrow_cast<size_t>(row * _cols));
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}
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// Routine Description:
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// - Gets the height of the rectangle
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// Return Value:
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// - Height
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til::CoordType OutputCellRect::Height() const noexcept
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{
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return _rows;
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}
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// Routine Description:
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// - Gets the width of the rectangle
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// Return Value:
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// - Width
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til::CoordType OutputCellRect::Width() const noexcept
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{
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return _cols;
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}
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