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compute bounds and kk before passes

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homm 2016-12-01 14:04:31 +03:00
parent 4ff7afbe16
commit d382183591
1 changed files with 34 additions and 29 deletions
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63
libImaging/Resample.c
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@ -569,52 +569,57 @@ ImagingResampleInner(Imaging imIn, int xsize, int ysize,
Imaging imTemp = NULL;
Imaging imOut = NULL;
int ksize;
int *bounds;
double *kk;
int ksize_horiz, ksize_vert;
int *bounds_horiz, *bounds_vert;
double *kk_horiz, *kk_vert;
ksize_horiz = precompute_coeffs(imIn->xsize, box[0], box[2], xsize,
filterp, &bounds_horiz, &kk_horiz);
if ( ! ksize_horiz) {
return NULL;
}
ksize_vert = precompute_coeffs(imIn->ysize, box[1], box[3], ysize,
filterp, &bounds_vert, &kk_vert);
if ( ! ksize_vert) {
free(bounds_horiz);
free(kk_horiz);
return NULL;
}
/* two-pass resize, first pass */
if (box[0] || box[2] != xsize) {
ksize = precompute_coeffs(imIn->xsize, box[0], box[2], xsize, filterp,
&bounds, &kk);
if ( ! ksize) {
return NULL;
}
imTemp = ImagingNew(imIn->mode, xsize, imIn->ysize);
if (imTemp) {
ResampleHorizontal(imTemp, imIn,
ksize_horiz, bounds_horiz, kk_horiz);
}
free(bounds_horiz);
free(kk_horiz);
if ( ! imTemp) {
free(bounds);
free(kk);
free(bounds_vert);
free(kk_vert);
return NULL;
}
ResampleHorizontal(imTemp, imIn, ksize, bounds, kk);
free(bounds);
free(kk);
imOut = imIn = imTemp;
}
/* second pass */
if (box[1] || box[3] != ysize) {
ksize = precompute_coeffs(imIn->ysize, box[1], box[3], ysize, filterp,
&bounds, &kk);
if ( ! ksize) {
ImagingDelete(imTemp);
return NULL;
}
imOut = ImagingNew(imIn->mode, imIn->xsize, ysize);
if ( ! imOut) {
free(bounds);
free(kk);
return NULL;
if (imOut) {
/* imIn can be the original image or horizontally resampled one */
ResampleVertical(imOut, imIn,
ksize_vert, bounds_vert, kk_vert);
}
/* imIn can be the original image or horizontally resampled one */
ResampleVertical(imOut, imIn, ksize, bounds, kk);
/* it's safe to call ImagingDelete with empty value
if previous step was not performed. */
ImagingDelete(imTemp);
free(bounds);
free(kk);
free(bounds_vert);
free(kk_vert);
if ( ! imOut) {
return NULL;
}
}
/* none of the previous steps are performed, copying */