godot/thirdparty/msdfgen/core/bitmap-interpolation.hpp
2024-03-13 09:12:50 +02:00

26 lines
671 B
C++

#pragma once
#include "arithmetics.hpp"
#include "Vector2.hpp"
#include "BitmapRef.hpp"
namespace msdfgen {
template <typename T, int N>
static void interpolate(T *output, const BitmapConstRef<T, N> &bitmap, Point2 pos) {
pos -= .5;
int l = (int) floor(pos.x);
int b = (int) floor(pos.y);
int r = l+1;
int t = b+1;
double lr = pos.x-l;
double bt = pos.y-b;
l = clamp(l, bitmap.width-1), r = clamp(r, bitmap.width-1);
b = clamp(b, bitmap.height-1), t = clamp(t, bitmap.height-1);
for (int i = 0; i < N; ++i)
output[i] = mix(mix(bitmap(l, b)[i], bitmap(r, b)[i], lr), mix(bitmap(l, t)[i], bitmap(r, t)[i], lr), bt);
}
}