Vips.Image.subsample (original) (raw)
Method
VipsImagesubsample
Declaration [src]
int
vips_subsample (
VipsImage* in,
VipsImage** out,
int xfac,
int yfac,
...
)
Description [src]
Subsample an image by an integer fraction. This is fast, nearest-neighbour shrink.
For small horizontal shrinks, this operation will fetch lines of pixels from in and then subsample that line. For large shrinks it will fetch single pixels.
If point is set, in will always be sampled in points. This can be faster if the previous operations in the pipeline are very slow.
Optional arguments
point:gboolean, turn on point sample mode
This method is not directly available to language bindings.
Parameters
out
Type: VipsImage
Output image.
| The argument will be set by the function. |
|---|
| The caller of the method takes ownership of the returned data, and is responsible for freeing it. |
xfac
Type: int
Horizontal shrink factor.
yfac
Type: int
Vertical shrink factor.
...
Type: ``
NULL-terminated list of optional named arguments.
Return value
Type: int
0 on success, -1 on error.