int(*VipsGenerateFn)(VipsRegion*out,void*seq,void*a,void*b,gboolean*stop)

Fillout->valid with pixels.seq contains per-thread state, such as theinput regions. Setstop toTRUE to stop processing.

out

Type: VipsRegion

VipsRegion to fill.

The data is owned by the caller of the function.

seq

Type: void*

Sequence value.

The argument can beNULL.

The data is owned by the caller of the function.

a

Type: void*

User data.

The argument can beNULL.

The data is owned by the caller of the function.

b

Type: void*

User data.

The argument can beNULL.

The data is owned by the caller of the function.

stop

Type: gboolean*

Set this to stop processing.

The data is owned by the caller of the function.