cosmopolitan/third_party/avir/resize.cc

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2020-06-15 14:18:57 +00:00
/*-*-mode:c++;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8-*-│
vi: set net ft=c++ ts=2 sts=2 sw=2 fenc=utf-8 :vi
Copyright 2020 Justine Alexandra Roberts Tunney
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "third_party/avir/resize.h"
namespace {
#include "third_party/avir/avir_float4_sse.h"
} // namespace
struct ResizerImpl {
ResizerImpl() : resizer{8, 8, avir::CImageResizerParamsULR()} {}
avir::CImageResizer<avir::fpclass_float4> resizer;
};
void NewResizer(Resizer *resizer, int aResBitDepth, int aSrcBitDepth) {
FreeResizer(resizer);
resizer->p = new ResizerImpl();
}
void FreeResizer(Resizer *resizer) {
if (!resizer->p) return;
delete (ResizerImpl *)resizer->p;
resizer->p = nullptr;
}
void ResizeImage(Resizer *resizer, float *Dest, int DestHeight, int DestWidth,
const float *Src, int SrcHeight, int SrcWidth) {
ResizerImpl *impl = (ResizerImpl *)resizer->p;
int SrcScanLineSize = 0;
double ResizingStep = 0;
impl->resizer.resizeImage(Src, SrcWidth, SrcHeight, SrcScanLineSize, Dest,
DestWidth, DestHeight, 4, ResizingStep);
}