mirror of https://github.com/Chlumsky/msdfgen.git
27 lines
704 B
C++
27 lines
704 B
C++
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#pragma once
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#include "types.h"
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#include "arithmetics.hpp"
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#include "Vector2.hpp"
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#include "BitmapRef.hpp"
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namespace msdfgen {
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template <typename T, int N>
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static void interpolate(T *output, const BitmapConstRef<T, N> &bitmap, Point2 pos) {
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pos -= real(.5);
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int l = (int) floor(pos.x);
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int b = (int) floor(pos.y);
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int r = l+1;
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int t = b+1;
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real lr = pos.x-real(l);
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real bt = pos.y-real(b);
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l = clamp(l, bitmap.width-1), r = clamp(r, bitmap.width-1);
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b = clamp(b, bitmap.height-1), t = clamp(t, bitmap.height-1);
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for (int i = 0; i < N; ++i)
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output[i] = mix(mix(bitmap(l, b)[i], bitmap(r, b)[i], lr), mix(bitmap(l, t)[i], bitmap(r, t)[i], lr), bt);
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}
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}
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