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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include "/usr/vesa/spec/terpdef.h"
# Quickie benchmark, 1-d sequential image interpolators.
define MAX_PIXELS 2048
define SZ_NAME 20
task interp
procedure interp()
real data[MAX_PIXELS], x[MAX_PIXELS], y[MAX_PIXELS]
real coeff[2 * MAX_PIXELS + SZ_ASI]
char interp_name[SZ_NAME]
int i, j, npix, nlines, interpolant
bool streq()
int clgeti()
begin
npix = min (MAX_PIXELS, clgeti ("npix"))
nlines = npix # square image
call clgstr ("interpolant", interp_name, SZ_NAME)
if (streq (interp_name, "nearest"))
interpolant = IT_NEAR
else if (streq (interp_name, "linear"))
interpolant = IT_LINEAR
else if (streq (interp_name, "poly3"))
interpolant = IT_POLY3
else if (streq (interp_name, "poly5"))
interpolant = IT_POLY5
else if (streq (interp_name, "spline3"))
interpolant = IT_SPLINE3
else
call error (0, "Unknown interpolant keyword")
call asiset (coeff, II_INIT, 0)
call asiset (coeff, II_INTERPOLANT, interpolant)
call asiset (coeff, II_ALLGOODPIX, YES)
do i = 1, npix { # initialize data, x arrays
data[i] = max(1.0, min(real(npix), real(i) + 0.15151))
x[i] = i
}
do j = 1, nlines { # interpolate npix ** 2
call asifit (data, npix, coeff)
call asieva (x, y, npix, coeff)
}
end
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