41 lines
2.5 KiB
C++
41 lines
2.5 KiB
C++
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/*-*-mode:c++;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8-*-│
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│vi: set net ft=c++ ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/limits.h"
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#include "libc/log/check.h"
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#include "libc/log/log.h"
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#include "third_party/avir/lanczos.h"
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namespace {
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#include "third_party/avir/lancir.h"
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} // namespace
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/**
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* Does Lanczos interpolation.
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* @note computers w/o AVX2+FMA need to call BilinearScale()
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*/
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void lanczos(unsigned dyn, unsigned dxn, void *restrict dst, unsigned syn,
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unsigned sxn, const void *restrict src, unsigned sw) {
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avir::CLancIR lanczos;
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DCHECK_ALIGNED(64, dst);
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DCHECK_ALIGNED(64, src);
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LOGF("%10s%5zux×%-5zu→%5zu×%-5zu", "lanczos", sxn, syn, dxn, dyn);
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lanczos.resizeImage((const float *)src, sxn, syn, sw, (float *)dst, dxn, dyn,
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4);
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}
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