python-pillow/Pillow
1
1
Fork 0
mirror of https://github.com/python-pillow/Pillow.git synced 2025-01-29 18:54:16 +03:00
Code Issues Packages Projects Releases Wiki Activity

2 times faster ImagingRotate180

Browse Source
This commit is contained in:
Alexander 2017-09-11 01:07:38 +03:00
parent 97141bcfd6
commit 67459795db
1 changed files with 19 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
libImaging/Geometry.c
View File

@ -32,18 +32,16 @@ ImagingFlipLeftRight(Imaging imOut, Imaging imIn)
for (y = 0; y < imIn->ysize; y++) { for (y = 0; y < imIn->ysize; y++) {
UINT8* in = (UINT8*) imIn->image8[y]; UINT8* in = (UINT8*) imIn->image8[y];
UINT8* out = (UINT8*) imOut->image8[y]; UINT8* out = (UINT8*) imOut->image8[y];
x = 0;
xr = imIn->xsize-1; xr = imIn->xsize-1;
for (; x < imIn->xsize; x++, xr--) for (x = 0; x < imIn->xsize; x++, xr--)
out[xr] = in[x]; out[xr] = in[x];
} }
} else { } else {
for (y = 0; y < imIn->ysize; y++) { for (y = 0; y < imIn->ysize; y++) {
UINT32* in = (UINT32*) imIn->image32[y]; UINT32* in = (UINT32*) imIn->image32[y];
UINT32* out = (UINT32*) imOut->image32[y]; UINT32* out = (UINT32*) imOut->image32[y];
x = 0;
xr = imIn->xsize-1; xr = imIn->xsize-1;
for (; x < imIn->xsize; x++, xr--) for (x = 0; x < imIn->xsize; x++, xr--)
out[xr] = in[x]; out[xr] = in[x];
} }
} }
@ -175,25 +173,29 @@ ImagingRotate180(Imaging imOut, Imaging imIn)
ImagingCopyInfo(imOut, imIn); ImagingCopyInfo(imOut, imIn);
#define ROTATE_180(image)\
for (y = 0; y < imIn->ysize; y++, yr--) {\
xr = imIn->xsize-1;\
for (x = 0; x < imIn->xsize; x++, xr--)\
imOut->image[y][x] = imIn->image[yr][xr];\
}
ImagingSectionEnter(&cookie); ImagingSectionEnter(&cookie);
yr = imIn->ysize-1; yr = imIn->ysize-1;
if (imIn->image8) if (imIn->image8) {
ROTATE_180(image8) for (y = 0; y < imIn->ysize; y++, yr--) {
else UINT8* in = (UINT8*) imIn->image8[y];
ROTATE_180(image32) UINT8* out = (UINT8*) imOut->image8[yr];
xr = imIn->xsize-1;
for (x = 0; x < imIn->xsize; x++, xr--)
out[xr] = in[x];
}
} else {
for (y = 0; y < imIn->ysize; y++, yr--) {
UINT32* in = (UINT32*) imIn->image32[y];
UINT32* out = (UINT32*) imOut->image32[yr];
xr = imIn->xsize-1;
for (x = 0; x < imIn->xsize; x++, xr--)
out[xr] = in[x];
}
}
ImagingSectionLeave(&cookie); ImagingSectionLeave(&cookie);
#undef ROTATE_180
return imOut; return imOut;
} }