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Merge pull request #2728 from uploadcare/fast-geometry

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Faster ImagingFlipLeftRight
This commit is contained in:
Alexander Karpinsky 2017-09-10 13:08:24 +03:00 committed by GitHub
commit 97141bcfd6
1 changed files with 19 additions and 13 deletions
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32
libImaging/Geometry.c
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@ -26,24 +26,30 @@ ImagingFlipLeftRight(Imaging imOut, Imaging imIn)
ImagingCopyInfo(imOut, imIn);
#define FLIP_HORIZ(image)\
for (y = 0; y < imIn->ysize; y++) {\
xr = imIn->xsize-1;\
for (x = 0; x < imIn->xsize; x++, xr--)\
imOut->image[y][x] = imIn->image[y][xr];\
}
ImagingSectionEnter(&cookie);
if (imIn->image8)
FLIP_HORIZ(image8)
else
FLIP_HORIZ(image32)
if (imIn->image8) {
for (y = 0; y < imIn->ysize; y++) {
UINT8* in = (UINT8*) imIn->image8[y];
UINT8* out = (UINT8*) imOut->image8[y];
x = 0;
xr = imIn->xsize-1;
for (; x < imIn->xsize; x++, xr--)
out[xr] = in[x];
}
} else {
for (y = 0; y < imIn->ysize; y++) {
UINT32* in = (UINT32*) imIn->image32[y];
UINT32* out = (UINT32*) imOut->image32[y];
x = 0;
xr = imIn->xsize-1;
for (; x < imIn->xsize; x++, xr--)
out[xr] = in[x];
}
}
ImagingSectionLeave(&cookie);
#undef FLIP_HORIZ
return imOut;
}