jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2022, Rodrigo Tobar <rtobarc@gmail.com>.
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <LibPDF/Interpolation.h>
8
9namespace PDF {
10
11static float slope(float x_min, float x_max, float y_min, float y_max)
12{
13 return (y_max - y_min) / (x_max - x_min);
14}
15
16LinearInterpolation1D::LinearInterpolation1D(float x_min, float x_max, float y_min, float y_max)
17 : m_x_min(x_min)
18 , m_y_min(y_min)
19 , m_slope(slope(x_min, x_max, y_min, y_max))
20{
21}
22
23float LinearInterpolation1D::interpolate(float x) const
24{
25 return m_y_min + ((x - m_x_min) * m_slope);
26}
27
28void LinearInterpolation1D::interpolate(Span<float> const& x, Span<float> y) const
29{
30 for (size_t i = 0; i < x.size(); ++i) {
31 y[i] = interpolate(x[i]);
32 }
33}
34
35}