Method

VipsImagereorder_prepare_many

Declaration [src] 

int
vips_reorder_prepare_many (
  VipsImage* image,
  VipsRegion** regions,
  VipsRect* r
)

Description [src]

vips_reorder_prepare_many() runs vips_region_prepare() on each region in regions, requesting the pixels in r.

It tries to request the regions in the order which will cause least recomputation. This can give a large speedup, in some cases.

See also

vips_region_prepare(), vips_reorder_margin_hint().

Parameters

regions

Type: An array of VipsRegion*

The set of regions to prepare.

The data is owned by the caller of the method.
r

Type: VipsRect

The VipsRect to prepare on each region.

The data is owned by the caller of the method.

Return value

Type: int

0 on success, or -1 on error.