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Implement ImagingTransposeRotate180

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This commit is contained in:
Alexander 2017-09-11 01:47:47 +03:00
parent 67459795db
commit a2a2d8d716
4 changed files with 51 additions and 1 deletions
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1
PIL/Image.py
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@ -150,6 +150,7 @@ ROTATE_90 = 2
ROTATE_180 = 3 ROTATE_180 = 3
ROTATE_270 = 4 ROTATE_270 = 4
TRANSPOSE = 5 TRANSPOSE = 5
TRANSPOSE_ROTATE_180 = 6
# transforms # transforms
AFFINE = 0 AFFINE = 0

4
_imaging.c
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@ -1674,6 +1674,7 @@ _transpose(ImagingObject* self, PyObject* args)
case 2: /* rotate 90 */ case 2: /* rotate 90 */
case 4: /* rotate 270 */ case 4: /* rotate 270 */
case 5: /* transpose */ case 5: /* transpose */
case 6: /* transpose and rotate 180 */
imOut = ImagingNewDirty(imIn->mode, imIn->ysize, imIn->xsize); imOut = ImagingNewDirty(imIn->mode, imIn->ysize, imIn->xsize);
break; break;
default: default:
@ -1701,6 +1702,9 @@ _transpose(ImagingObject* self, PyObject* args)
case 5: case 5:
(void) ImagingTranspose(imOut, imIn); (void) ImagingTranspose(imOut, imIn);
break; break;
case 6:
(void) ImagingTransposeRotate180(imOut, imIn);
break;
} }
return PyImagingNew(imOut); return PyImagingNew(imOut);

44
libImaging/Geometry.c
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@ -160,6 +160,50 @@ ImagingTranspose(Imaging imOut, Imaging imIn)
} }
Imaging
ImagingTransposeRotate180(Imaging imOut, Imaging imIn)
{
ImagingSectionCookie cookie;
int x, y, xx, yy, xxsize, yysize;
int xr, yr;
if (!imOut || !imIn || strcmp(imIn->mode, imOut->mode) != 0)
return (Imaging) ImagingError_ModeError();
if (imIn->xsize != imOut->ysize || imIn->ysize != imOut->xsize)
return (Imaging) ImagingError_Mismatch();
ImagingCopyInfo(imOut, imIn);
#define TRANSPOSE(image) \
for (y = 0; y < imIn->ysize; y += ROTATE_CHUNK) { \
for (x = 0; x < imIn->xsize; x += ROTATE_CHUNK) { \
yysize = y + ROTATE_CHUNK < imIn->ysize ? y + ROTATE_CHUNK : imIn->ysize; \
xxsize = x + ROTATE_CHUNK < imIn->xsize ? x + ROTATE_CHUNK : imIn->xsize; \
for (yy = y; yy < yysize; yy++) { \
yr = imIn->ysize - 1 - yy; \
xr = imIn->xsize - 1 - x; \
for (xx = x; xx < xxsize; xx++, xr--) { \
imOut->image[xr][yr] = imIn->image[yy][xx]; \
} \
} \
} \
}
ImagingSectionEnter(&cookie);
if (imIn->image8)
TRANSPOSE(image8)
else
TRANSPOSE(image32)
ImagingSectionLeave(&cookie);
#undef TRANSPOSE
return imOut;
}
Imaging Imaging
ImagingRotate180(Imaging imOut, Imaging imIn) ImagingRotate180(Imaging imOut, Imaging imIn)
{ {

3
libImaging/Imaging.h
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@ -291,8 +291,9 @@ extern Imaging ImagingRankFilter(Imaging im, int size, int rank);
extern Imaging ImagingRotate90(Imaging imOut, Imaging imIn); extern Imaging ImagingRotate90(Imaging imOut, Imaging imIn);
extern Imaging ImagingRotate180(Imaging imOut, Imaging imIn); extern Imaging ImagingRotate180(Imaging imOut, Imaging imIn);
extern Imaging ImagingRotate270(Imaging imOut, Imaging imIn); extern Imaging ImagingRotate270(Imaging imOut, Imaging imIn);
extern Imaging ImagingResample(Imaging imIn, int xsize, int ysize, int filter, float box[4]);
extern Imaging ImagingTranspose(Imaging imOut, Imaging imIn); extern Imaging ImagingTranspose(Imaging imOut, Imaging imIn);
extern Imaging ImagingTransposeRotate180(Imaging imOut, Imaging imIn);
extern Imaging ImagingResample(Imaging imIn, int xsize, int ysize, int filter, float box[4]);
extern Imaging ImagingTransform( extern Imaging ImagingTransform(
Imaging imOut, Imaging imIn, int method, int x0, int y0, int x1, int y1, Imaging imOut, Imaging imIn, int method, int x0, int y0, int x1, int y1,
double *a, int filter, int fill); double *a, int filter, int fill);