Vips.Image.sink (original) (raw)

Method

Vips Imagesink

Declaration [src]


int
vips_sink (
  VipsImage* im,
  VipsStartFn start_fn,
  VipsGenerateFn generate_fn,
  VipsStopFn stop_fn,
  void* a,
  void* b
)

Description [src]

Loops over an image. generate_fn is called for every pixel in the image, with the reg argument being a region of calculated pixels.vips_sink() is used to implement operations likevips_avg() which have no image output.

Each set of pixels is sized according to the requirements of the image pipeline that generated im.

Parameters

start_fn

Type: VipsStartFn

Start sequences with this function.

generate_fn

Type: VipsGenerateFn

Generate pixels with this function.

stop_fn

Type: VipsStopFn

Stop sequences with this function.

a

Type: void*

User data.

The argument can be NULL.
The data is owned by the caller of the method.

b

Type: void*

User data.

The argument can be NULL.
The data is owned by the caller of the method.

Return value

Type: int

0 on success, or -1 on error.