.TH IM_CP_DESC 3 "11 April 1990"
.SH NAME
im_cp_desc, im_append_Hist \- copy most of an image descriptor to another
image descriptor.
.SH SYNOPSIS
.B #include <vips/vips.h>

int im_cp_desc_array( IMAGE *out, IMAGE *in[] );

int im_cp_descv( IMAGE *out, IMAGE *in1, ... );

.B int im_cp_desc( IMAGE *out,  IMAGE *in );

.B int im_append_Hist( IMAGE *out, IMAGE *in );

.SH DESCRIPTION
.B im_cp_desc_array(3)
takes an output image and a NULL-terminated list of input images, which must
contain at least one input image. 

It copies the fields describing the size, bands, type, resolution, and
coding from the first input image to the output image. History and meta from
all images are copied over. If two input images have the same meta tag, the
earlier one takes precedence.

.B im_cp_descv(3)
is a varargs conveniece function for 
.B im_cp_desc_array(3).

.B im_cp_desc(3)
is a convenience function which calls
.B im_cp_descv( image1, image2, NULL ).

.B im_append_Hist(3)
appends the history attached to image2 to the end of the history on image1. It
is used by image processing functions which take more than one image as input,
and which need to make sure that all the input history appears in the output.

The first line of image2 history is not copied, as this conventionally holds
background information which is not part of the file history.

.SH RETURN VALUE
The function returns 0 on success and -1 on error.
.SH COPYRIGHT
.br
N. Dessipris
.SH AUTHOR
N. Dessipris \- 11/04/1990