PREDICATES(3) PREDICATES(3)
NAME
im_region_create, im_region_free - region creation and destruction
SYNOPSIS
#include <vips/vips.h>
REGION *im_region_create( im )
IMAGE *im;
int im_region_free( reg )
REGION *reg;
DESCRIPTION
These functions create and destroy regions on images. Regions are used
for PIO, see accompanying documentation. Regions have type
typedef struct {
Rect valid /* Area of im represented */
IMAGE *im; /* im we are defined on */
... more fields, all private and used for
... housekeeping
} REGION;
im_region_create(3) returns a pointer to a new region, or NULL on
error. Regions are made blank, with no input or output possible. See
im_prepare(3), im_generate(3), im_start_one(3) and IM_REGION_ADDR(3).
im_region_free(3) frees a region and any resources associated with that
region. When an image is closed, all regions which have been created
on that image are automatically freed.
RETURN VALUE
All int-valued functions return zero on success and non-zero on error.
COPYRIGHT
National Gallery, 1993
AUTHOR
J. Cupitt - 23/7/93
11 April 1990 PREDICATES(3)
im_region_create 7.14.5 - Generated Mon Sep 8 19:47:25 CDT 2008