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FLIP_LEFT_RIGHT with multi-band format

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This commit is contained in:
Junxiao Shi 2024-06-02 17:38:27 +00:00
parent 0df0935bb4
commit c4434df6a1
3 changed files with 15 additions and 24 deletions
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3
Tests/test_file_tiff.py
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@ -905,6 +905,9 @@ class TestFileTiff:
im2 = im.crop((2, 2, 7, 7))
check_image(im2, 5, 5, pixel)
im3 = im.transpose(Image.Transpose.FLIP_LEFT_RIGHT)
check_image(im3, 10, 10, pixel)
@pytest.mark.skipif(not is_win32(), reason="Windows only")
class TestFileTiffW32:

6
src/_imaging.c
View File

@ -2143,14 +2143,16 @@ _transpose(ImagingObject *self, PyObject *args) {
case 1: /* flip top bottom */
case 3: /* rotate 180 */
imOut = ImagingNewDirty(
imIn->mode, (ImagingNewParams){imIn->xsize, imIn->ysize});
imIn->mode,
(ImagingNewParams){imIn->xsize, imIn->ysize, imIn->depth, imIn->bands});
break;
case 2: /* rotate 90 */
case 4: /* rotate 270 */
case 5: /* transpose */
case 6: /* transverse */
imOut = ImagingNewDirty(
imIn->mode, (ImagingNewParams){imIn->ysize, imIn->xsize});
imIn->mode,
(ImagingNewParams){imIn->ysize, imIn->xsize, imIn->depth, imIn->bands});
break;
default:
PyErr_SetString(PyExc_ValueError, "No such transpose operation");

30
src/libImaging/Geometry.c
View File

@ -17,7 +17,7 @@
Imaging
ImagingFlipLeftRight(Imaging imOut, Imaging imIn) {
ImagingSectionCookie cookie;
int x, y, xr;
// int x, y, xr;
if (!imOut || !imIn || strcmp(imIn->mode, imOut->mode) != 0) {
return (Imaging)ImagingError_ModeError();
@ -28,32 +28,18 @@ ImagingFlipLeftRight(Imaging imOut, Imaging imIn) {
ImagingCopyPalette(imOut, imIn);
#define FLIP_LEFT_RIGHT(INT, image) \
for (y = 0; y < imIn->ysize; y++) { \
INT *in = (INT *)imIn->image[y]; \
INT *out = (INT *)imOut->image[y]; \
xr = imIn->xsize - 1; \
for (x = 0; x < imIn->xsize; x++, xr--) { \
out[xr] = in[x]; \
} \
}
ImagingSectionEnter(&cookie);
if (imIn->image8) {
if (strncmp(imIn->mode, "I;16", 4) == 0) {
FLIP_LEFT_RIGHT(UINT16, image8)
} else {
FLIP_LEFT_RIGHT(UINT8, image8)
for (int y = 0; y < imIn->ysize; ++y) {
char *in = imIn->image[y];
char *out = imOut->image[y];
int xr = imIn->linesize - imIn->pixelsize;
for (int x = 0; x < imIn->linesize;
x += imIn->pixelsize, xr -= imIn->pixelsize) {
memcpy(out + xr, in + x, imIn->pixelsize);
}
} else {
FLIP_LEFT_RIGHT(INT32, image32)
}
ImagingSectionLeave(&cookie);
#undef FLIP_LEFT_RIGHT
return imOut;
}