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Showing content from http://libvips.github.io/libvips/API/current/method.Image.reorder_prepare_many.html below:

Vips.Image.reorder_prepare_many

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

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().

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.

Type: int

0 on success, or -1 on error.

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