Method

VipsImageshrink

Declaration [src]

int
vips_shrink (
  VipsImage* in,
  VipsImage** out,
  double hshrink,
  double vshrink,
  ...
)

Description [src]

Optional arguments:

ceil: round-up output dimensions

Shrink in by a pair of factors with a simple box filter. For non-integer factors, vips_shrink() will first shrink by the integer part with a box filter, then use vips_reduce() to shrink by the remaining fractional part.

This is a very low-level operation: see vips_resize() for a more convenient way to resize images.

This operation does not change xres or yres. The image resolution needs to be updated by the application.

Parameters

`out`	`VipsImage`
	Output image.
	The argument will be set by the function.
	The instance takes ownership of the data, and is responsible for freeing it.
`hshrink`	`double`
	Horizontal shrink.
`vshrink`	`double`
	Vertical shrink.
`...`
	`NULL`-terminated list of optional named arguments.

Return value

Returns:	`int`
	0 on success, -1 on error.